期刊文献+
共找到1,721篇文章
< 1 2 87 >
每页显示 20 50 100
Application of fluid modulus inversion to complex lithology reservoirs in deep-water areas
1
作者 Zhaoming Chen Huaxing Lyu +2 位作者 Zhongtao Zhang Yanhui Zhu Baojun Liu 《Energy Geoscience》 EI 2024年第1期153-161,共9页
It has been a challenge to distinguish between seismic anomalies caused by complex lithology and hydrocarbon reservoirs using conventional fluid identification techniques,leading to difficulties in accurately predicti... It has been a challenge to distinguish between seismic anomalies caused by complex lithology and hydrocarbon reservoirs using conventional fluid identification techniques,leading to difficulties in accurately predicting hydrocarbon-bearing properties and determining oil-water contacts in reservoirs.In this study,we built a petrophysical model tailored to the deep-water area of the Baiyun Sag in the eastern South China Sea based on seismic data and explored the feasibility of the tri-parameter direct inversion method in the fluid identification of complex lithology reservoirs,offering a more precise alternative to conventional techniques.Our research found that the fluid modulus can successfully eliminate seismic amplitude anomalies caused by lithological variations.Furthermore,the seismic databased direct inversion for fluid modulus can remove the cumulative errors caused by indirect inversion and the influence of porosity.We discovered that traditional methods using seismic amplitude anomalies were ineffective in detecting fluids,determining gas-water contacts,or delineating high-quality reservoirs.However,the fluid factor Kf,derived from solid-liquid decoupling,proved to be sensitive to the identification of hydrocarbon-bearing properties,distinguishing between high-quality and poor-quality gas zones.Our findings confirm the value of the fluid modulus in fluid identification and demonstrate that the tri-parameter direct inversion method can significantly enhance hydrocarbon exploration in deep-water areas,reducing associated risks. 展开更多
关键词 Fluid identification Seismic fluid factor Solid-liquid decoupling Deep-water area Complex lithology reservoir
下载PDF
Research Advances and Exploration Significance of Large-area Accumulation of Low and Medium Abundance Lithologic Reservoirs 被引量:1
2
作者 ZHAO Wenzhi WANG Zecheng WANG Hongjun CHEN Mengjin 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2008年第3期463-476,共14页
In recent years, a series of large low and medium abundance oil and gas fields are discovered through exploration activities onshore China, which are commonly characterized by low porosity-permeability reservoirs, low... In recent years, a series of large low and medium abundance oil and gas fields are discovered through exploration activities onshore China, which are commonly characterized by low porosity-permeability reservoirs, low oil/gas column height, multiple thin hydrocarbon layers, and distribution in overlapping and connection, and so on. The advantageous conditions for large-area accumulation of low-medium abundance hydrocarbon reservoirs include: (1) large (fan) delta sandbodies are developed in the hinterland of large flow-uncontrolled lake basins and they are alternated with source rocks extensively in a structure like "sandwiches"; (2) effective hydrocarbon source kitchens are extensively distributed, offering maximum contact chances with various sandbodies and hydrocarbon source rocks; (3) oil and gas columns are low in height, hydrocarbon layers are mainly of normal-low pressure, and requirements for seal rock are low; (4) reservoirs have strong inheterogeneity and gas reservoirs are badly connected; (5) the hydrocarbon desorption and expulsion under uplifting and unloading environments cause widely distributed hydrocarbon source rocks of coal measures to form large-area reservoirs; (6) deep basin areas and synclinal areas possess reservoir-forming dynamics. The areas with great exploration potential include the Paleozoic and Mesozoic in the Ordos Basin, the Xujiahe Formation in Dachuanzhong in the Sichuan basin, deep basin areas in the Songliao basin etc. The core techniques of improving exploration efficiency consist of the sweetspot prediction technique that focuses on fine characterization of reservoirs, the hydrocarbon layer protecting and high-speed drilling technique, and the rework technique for enhancing productivity. 展开更多
关键词 reserve abundance lithologic hydrocarbon reservoir hydrocarbon-rich sag sweet spot exploration technique
下载PDF
Control of Formation of Lithological Reservoirs by Surrounding Mudstone 被引量:7
3
作者 Jiang Zhenxue Chen Dongxia +2 位作者 Pang Xiongqi Zhang Jun Tian Fenghua 《Petroleum Science》 SCIE CAS CSCD 2006年第2期1-6,共6页
Taking the Jiyang depression as an example, this paper discusses the control of the formation of lithological reservoir by surrounding rocks by integrated application of geological analysis, physical simulation, and t... Taking the Jiyang depression as an example, this paper discusses the control of the formation of lithological reservoir by surrounding rocks by integrated application of geological analysis, physical simulation, and the analysis of oil & gas accumulation mechanism. Geological statistical shows that the major burial depth and interval of lithological reservoirs in the Jiyang depression are related to the hydrocarbon generation in and expulsion from the Lower Tertiary source rocks and the time of the formation of most lithological reservoirs coincides with the peak of hydrocarbon generation and expulsion. The lithological traps located in the center of effective source rocks are propitious to high oil saturation than those located on the margin of effective source rocks. The hydrocarbon charge degree of the lithological reservoir has a positive correlation with the intensity of hydrocarbon expulsion from surrounding source rocks. Geological analyses and NMR experiments also show that the oil saturation of surrounding source rocks control the hydrocarbon potential of lithological traps, and a critical value for oil saturation of surrounding mudstone is required, that is, when the oil saturation of surrounding mudstone is lower than this critical value, no oil and gas accumulate in the lithological trap. The control of surrounding mudstone on the oil-bearing properties of lithological reservoirs is also analyzed by the mechanisms of hydrocarbon generation and expulsion as well as accumulation. 展开更多
关键词 lithological reservoir Jiyang depression expulsion threshold nuclear magnetic resonance accumulation mechanism
下载PDF
Formation mechanisms,potentials and exploration practices of large lithologic gas reservoirs in and around an intracratonic rift:Taking the Sinian-Cambrian of Sichuan Basin as an example 被引量:6
4
作者 WEI Guoqi YANG Wei +9 位作者 XIE Wuren SU NanX IE Zengye ZENG Fuying MA Shiyu JIN Hui WANG Zhihong ZHU Qiuying HAO Cuiguo WANG Xiaodan 《Petroleum Exploration and Development》 CSCD 2022年第3期530-545,共16页
By examining structures,sediments,reservoirs and accumulation assemblages in the Deyang-Anyue rift and its surrounding area,four new understandings are obtained.First,during the initiation period of Deyang-Anyue rift,... By examining structures,sediments,reservoirs and accumulation assemblages in the Deyang-Anyue rift and its surrounding area,four new understandings are obtained.First,during the initiation period of Deyang-Anyue rift,multiple groups of faults developed in the rift due to the effect of tensile force,bringing about multiple mound and shoal belts controlled by horsts in the second member of the Sinian Dengying Formation;in the development stage of the rift,the boundary faults of the rift controlled the development of mound and shoal belts at the platform margin in the fourth member of Dengying Formation;during the shrinkage period of the rift,platform margin grain shoals of the Cambrian Canglangpu Formation developed in the rift margin.Second,four sets of large-scale mound and shoal reservoirs in the second member of Dengying Formation,the fourth member of Dengying Formation,Canglangpu Formation and Longwangmiao Formation overlap with several sets of source rocks such as Qiongzhusi Formation source rocks and Dengying Formation argillaceous limestone or dolomite developed inside and outside the rift,forming good source-reservoir-cap rock combinations;the sealing of tight rock layers in the lateral and updip direction results in the formation model of large lithologic gas reservoirs of oil pool before gas,continuous charging and independent preservation of each gas reservoir.Third,six favorable exploration zones of large-scale lithologic gas reservoirs have been sorted out through comprehensive evaluation,namely,mound and shoal complex controlled by horsts in the northern part of the rift in the second member of Dengying Formation,isolated karst mound and shoal complex of the fourth member of Dengying Formation in the south of the rift,the superimposed area of multi-stage platform margin mounds and shoals of the second and fourth members of Dengying Formation and Canglangpu Formation in the north slope area,the platform margin mounds and shoals of the second and fourth members of Dengying Formation in the west side of the rift,the platform margin mound and shoal bodies of the fourth member of Dengying Formation in the south slope area,etc.Fourth,Well Pengtan-1 drilled on the mound and shoal complex controlled by horsts of the second member of Dengying Formation in the rift and Well Jiaotan-1 drilled on the platform margin mound and shoal complex of the North Slope have obtained high-yield gas flows in multiple target layers,marking the discovery of a new gas province with reserves of(2-3)×10^(12) m^(3).This has proved the huge exploration potential of large lithologic gas reservoir group related to intracratonic rift. 展开更多
关键词 intracratonic rift large lithologic gas reservoir accumulation mechanism Sichuan Basin Sinian-Cambrian Deying-Anyue rift mound and shoal belt
下载PDF
Major controlling factors and hydrocarbon accumulation models of large-scale lithologic reservoirs in shallow strata around the Bozhong sag,Bohai Bay Basin,China 被引量:1
5
作者 ZHOU Xinhuai WANG Deying +2 位作者 YU Haibo YANG Haifeng LI Long 《Petroleum Exploration and Development》 CSCD 2022年第4期758-769,共12页
Based on the practice of oil and gas exploration and the analysis of shallow lithologic reservoirs,combined with the allocation relationship and enrichment law of oil and gas accumulation factors,main controlling fact... Based on the practice of oil and gas exploration and the analysis of shallow lithologic reservoirs,combined with the allocation relationship and enrichment law of oil and gas accumulation factors,main controlling factors and models of hydrocarbon accumulation of large lithologic reservoirs in shallow strata around the Bozhong sag are summarized,and favorable exploration areas are proposed.The coupling of the four factors of“ridge-fault-sand-zone”is crucial for the hydrocarbon enrichment in the shallow lithologic reservoirs.The convergence intensity of deep convergence ridges is the basis for shallow oil and gas enrichment,the activity intensity of large fault cutting ridges and the thickness of cap rocks control the vertical migration ability of oil and gas,the coupling degree of large sand bodies and fault cutting ridges control large-scale oil and gas filling,the fault sealing ability of structural stress concentration zones affects the enrichment degree of lithologic oil and gas reservoirs.Three enrichment models including uplift convergence type,steep slope sand convergence type and depression uplift convergence type are established through the case study of lithologic reservoirs in shallow strata around the Bozhong sag. 展开更多
关键词 shallow lithologic reservoir main controlling factors convergence ridge accumulation model Bozhong sag Bohai Bay Basin
下载PDF
The Integrated Approach to Seismic Attributes of Lithological Characterization of Reservoirs: Case of the F3 Block, North Sea-Dutch Sector 被引量:1
6
作者 Oumarou Sanda Djeddi Mabrouk +3 位作者 Tabod C. Tabod Jean Marcel Jean M. Abate Essi Simon Ngos III 《Open Journal of Earthquake Research》 2020年第3期273-288,共16页
Technological development, particularly the development of signal processing, has contributed to the improvement of the quality of results in the analysis of the characteristics of hydrocarbon reservoirs. This scienti... Technological development, particularly the development of signal processing, has contributed to the improvement of the quality of results in the analysis of the characteristics of hydrocarbon reservoirs. This scientific advance is especially marked by the introduction of seismic attributes in the characterization of reservoirs. This paper is aimed at evaluating the contribution of seismic attributes in the lithological characterization of hydrocarbon accumulation zones. Thus, it has been found that instantaneous attributes make it possible to highlight the different properties of reservoir rocks. Techniques for extracting three-dimensional volume attributes have been applied to a 3D seismic data volume of the F3 block in the Dutch sector of the North Sea. The purpose of using these volume attributes is to extract signal characteristics from lithofacies in hydrocarbon zones. The results provide a remarkable contribution to instantaneous seismic attributes in reservoir location, hydrocarbon detection, and reservoir lithological prediction. The instantaneous amplitude, the derivative of amplitude 1, the factor Q, the energy and the Hilbert transform are attributes which highlight the presence of hydrocarbons through the bright spots. Thus, curvature, similarity, dip, and coherence are useful in the determination of traps such as faults and anticlines. The crossing of the instantaneous amplitude and the instantaneous frequency makes it possible to analyze the lithofacies. In the same way, the analysis of the crossed diagrams between the porosity and the instantaneous amplitude made it possible to define the different layers of the reservoir. 展开更多
关键词 SEISMIC SEISMIC Attributes CHARACTERIZATION lithologY reservoir
下载PDF
Formation conditions of Sinian–Cambrian large lithologic gas reservoirs in the north slope area of central Sichuan Basin,SW China
7
作者 WEI Guoqi XIE Zengye +10 位作者 YANG Yu LI Jian YANG Wei ZHAO Luzi YANG Chunlong ZHANG Lu XIE Wuren JIANG Hua LI Zhisheng LI Jin GUO Jianying 《Petroleum Exploration and Development》 CSCD 2022年第5期963-976,共14页
Based on analyses of characteristics,hydrocarbon charging history and geological conditions for the formation of Sinian-Cambrian reservoirs in the north slope area of central Sichuan paleo-uplift,the natural gas origi... Based on analyses of characteristics,hydrocarbon charging history and geological conditions for the formation of Sinian-Cambrian reservoirs in the north slope area of central Sichuan paleo-uplift,the natural gas origin,accumulation evolution,accumulation pattern and formation conditions of large lithologic gas reservoirs have been investigated.Through comprehensive analyses of natural gas composition,carbon and hydrogen isotopic compositions,fluid inclusions,reservoir bitumen,and geological conditions such as lithofacies paleogeography and beach body characterization,it is concluded that:(1)The natural gas in the Sinian-Cambrian of the north slope area is mainly oil cracking gas,and different contribution ratios of multiple sets of source rocks lead to different geochemical characteristics of natural gas in different reservoirs.(2)Although the both Sinian and Cambrian gas reservoirs in this area are lithologic gas reservoirs under monocline background,the former has normal-pressure and the latter has high-pressure.There are three types of source-reservoir-caprock combinations:single source with lower generation and upper reservoir,double sources with lower generation and upper reservoir or with side source and lateral reservoir,double sources with lower generation and upper reservoir or with upper generation and lower reservoir.The Permian-Triassic is the main generation period of oil,Early-Middle Jurassic is the main generation period of oil cracking gas and wet gas,and Late Jurassic-Cretaceous is the main generation period of dry gas.(3)The Sinian-Cambrian system of the north slope area has two favorable conditions for formation of large lithologic gas reservoirs,one is that the large scale beach facies reservoirs are located in the range of ancient oil reservoirs or near the source rocks,which is conducive to the"in-situ"large-scale accumulation of cracked gas in the paleo-oil reservoirs,the other is that the large scale mound-beach complex reservoirs and sealing layers of inter beach tight zones match effectively to form large lithologic traps under the slope background.The research results confirm that the north slope area has large multi-layer lithologic gas reservoirs with more than one trillion cubic meters of natural gas resources and great exploration potential. 展开更多
关键词 lithologic gas reservoir cracking gas accumulation pattern geochemical characteristics Sinian System Cambrian System Sichuan Basin
下载PDF
Automatic discrimination of sedimentary facies and lithologies in reef-bank reservoirs using borehole image logs 被引量:12
8
作者 柴华 李宁 +4 位作者 肖承文 刘兴礼 李多丽 王才志 吴大成 《Applied Geophysics》 SCIE CSCD 2009年第1期17-29,102,共14页
Reef-bank reservoirs are an important target for petroleum exploration in marine carbonates and also an essential supplemental area for oil and gas production in China. Due to the diversity of reservoirs and the extre... Reef-bank reservoirs are an important target for petroleum exploration in marine carbonates and also an essential supplemental area for oil and gas production in China. Due to the diversity of reservoirs and the extreme heterogeneity of reef-banks, it is very difficult to discriminate the sedimentary facies and lithologies in reef-bank reservoirs using conventional well logs. The borehole image log provides clear identification of sedimentary structures and textures and is an ideal tool for discriminating sedimentary facies and lithologies. After examining a large number of borehole images and cores, we propose nine typical patterns for borehole image interpretation and a method that uses these patterns to discriminate sedimentary facies and lithologies in reeI^bank reservoirs automatically. We also develop software with user-friendly interface. The results of applications in reef-bank reservoirs in the middle Tarim Basin and northeast Sichuan have proved that the proposed method and the corresponding software are quite effective. 展开更多
关键词 Reef-bank reservoirs sedimentary facies lithology borehole image logs pattern recognition
下载PDF
Formation conditions of Neogene large-scale high-abundance lithologic reservoir in the Laibei low uplift,Bohai Sea,East China 被引量:1
9
作者 XU Changgui YANG Haifeng +2 位作者 WANG Deying ZHAO Dijiang WANG Liliang 《Petroleum Exploration and Development》 CSCD 2021年第1期15-29,共15页
By using drilling,high-precision 3 D seismic data,data of geochemistry,logging and testing,the reservoir characteristics and accumulation conditions of the KL6-1 lithologic oilfield in the Laibei Low Uplift in the Boh... By using drilling,high-precision 3 D seismic data,data of geochemistry,logging and testing,the reservoir characteristics and accumulation conditions of the KL6-1 lithologic oilfield in the Laibei Low Uplift in the Bohai Sea are examined comprehensively.The study shows that:KL6-1 oilfield is a monolithic,high-quality,large-scale Neogene lithologic oilfield featuring shallow reservoir depth,high productivity,concentrated oil-bearing intervals,large oil-bearing area,and high reserve abundance;hydrocarbon source supply from two directions provides a sufficient material basis for the formation of large oil field;two types of"inherited structural ridge"developed under the effect of block rotation,late active faults formed by Neotectonic movement,and widely distributed contiguous sand bodies provide an efficient oil and gas transportation system for the large-scale accumulation of oil and gas;contiguous channel and lacustrine lowstand system sand bodies developed in low accommodation condition provide the basic condition for the formation of large-scale lithologic traps;deep formations structural ridge,faults(dominant migration pathways)and large-scale superimposed contiguous sand bodies constitute a"vine type"oil and gas migration and accumulation system in the Laibei Low Uplift,which is conducive to the formation of large-scale and high-abundance lithologic reservoir in this area.The successful discovery of KL6-1,100 million ton reserve order lithologic oil field,has revealed the exploration potential of Neogene large lithologic reservoirs in Bohai Sea,expanded the exploration field,and also has certain reference significance for the exploration of large lithologic reservoirs in similar areas. 展开更多
关键词 lowstand system sand bodies bidirectional hydrocarbon source LARGE-SCALE lithologic oil reservoir formation mechanism NEOGENE Bohai Bay Basin Bohai Sea area
下载PDF
Log identification method in complex sand reservoirs 被引量:3
10
作者 ZHAO Xiao-liang LIAO Xin-wei +2 位作者 CHEN Xi XU Sheng-feng XU An-zhu 《Mining Science and Technology》 EI CAS 2009年第4期531-536,共6页
In order to obtain effective parameters for complex sand reservoirs,a log evaluation method for relevant reservoir parameters is established based on an analysis in the gas-bearing sandstone with high porosity and low... In order to obtain effective parameters for complex sand reservoirs,a log evaluation method for relevant reservoir parameters is established based on an analysis in the gas-bearing sandstone with high porosity and low permeability,low porosity and permeability and on various characteristics of log responses to reservoir lithologies and physical properties in the Neopleozoic sand reservoir of the Ordos basin.This log evaluation method covers the Cook method that is used to evaluate the porosity and oiliness in high porosity and low permeability reservoirs and another method in which the mineral content,derived from geochemical logs,is used to identify formation lithologies.Some areas have high calcium and low silt content,not uniformly distributed,the results of which show up in the complex formation lithologies and conventional log responses with great deviation.The reliability of the method is verified by comparison with conventional log data and core analyses.The calculation results coincide with the core analytical data and gas tests,which indicate that this log evaluation method is available,provides novel ideas for study of similar complex reservoir lithologies and has some reference value. 展开更多
关键词 complex formation lithology reservoir parameter evaluation Cook method geochemical element element content mineral constituent lithological identification
下载PDF
Log evaluation of fractured igneous reservoirs in Songliao Basin 被引量:1
11
作者 Baozhi PAN Lihua ZHANG Ying ZHANG Chen HUANG 《Global Geology》 2007年第1期65-68,共4页
The petrophysical parameters are bad in most igneous reservoirs of Songliao Basin because of the very low porosity and permeability.The evaluation of igneous reservoirs has not been fully studied so far.The current te... The petrophysical parameters are bad in most igneous reservoirs of Songliao Basin because of the very low porosity and permeability.The evaluation of igneous reservoirs has not been fully studied so far.The current technique of formation evaluation and interpretation used in sedimentary formations face a series of problems and difficulties.In this study,The PCA was used to identify lithology,a multi-mineral model "QAPM" was proposed."Surface effect" must be considered when evaluating saturation.A software "SIMPLE" was developed and was used to deal with the logging data in over 70 wells with good results were achieved. 展开更多
关键词 igneous reservoirs lithologY Songliao Basin QAPM Model
下载PDF
Formation Conditions and Exploration-favoring Areas of Subtle Reservoirs in West Taibei Sag
12
作者 YuanMingsheng WangJinsong LiBin 《Petroleum Science》 SCIE CAS CSCD 2004年第2期87-98,共12页
At the initial stage of subtle reservoir exploration in the shallow to medium formations of the Taibei Sag, Tuha Basin, so far, three kinds of subtle reservoirs (stratigraphic, lithologic and structural-lithologic res... At the initial stage of subtle reservoir exploration in the shallow to medium formations of the Taibei Sag, Tuha Basin, so far, three kinds of subtle reservoirs (stratigraphic, lithologic and structural-lithologic reservoirs) have been found. Since both the amount and reserve of the discovered subtle reservoirs are small, a great exploration potential remains in the Taibei Sag. The shallow to medium formations in the west of the Taibei Sag were divided into three second-order sequences and ten third-order sequences, of which the rising cyclothems of SQ(J2q) and SQ8 (J2s2) datum level are major exploration targets for the subtle reservoirs (lithologic). The depositional systems of Qiquanhu and Subashi braided river delta were developed there, where the sedimentary sand body is dominated by the regional slopes and slope break belts. There are four main modes the formation of lithologic traps: deltaic front onlap on the slope belt, deltaic front toplap on the slope break belt, lately tilted frontal sand body and sublacustrine fan—slope fan on the slope break belt, of which the first three modes are the major styles of the formation of subtle reservoirs. Major targets for subtle reservoir exploration in the near future include Putaogou Member on the north slope of Huoyanshan, the east slope of Pubei, the nose-like palaeohigh regions of Huobei, Subashi and Lianmuqin, around the Shengbei secondary sag. 展开更多
关键词 Taibei Sag subtle reservoir exploration potential target sequence lithologic trap target zone
下载PDF
Hydraulic fracture geometry and proppant distribution in thin interbedded shale oil reservoirs
13
作者 ZOU Yushi SHI Shanzhi +4 位作者 ZHANG Shicheng LI Jianmin WANG Fei WANG Junchao ZHANG Xiaohuan 《Petroleum Exploration and Development》 CSCD 2022年第5期1185-1194,共10页
Small-scale true triaxial sand fracturing experiments are conducted on thin interbedded shale samples made from cores of Permian Lucaogou Formation shale oil reservoir in Jimsar sag, Junggar Basin, NW China. Combined ... Small-scale true triaxial sand fracturing experiments are conducted on thin interbedded shale samples made from cores of Permian Lucaogou Formation shale oil reservoir in Jimsar sag, Junggar Basin, NW China. Combined with high-precision CT scanning digital core model reconstruction technology, hydraulic fracture geometry and proppant distribution in thin interbedded shale oil reservoirs are studied. The research shows that: In thin interbedded shale oil reservoir, the interlayer difference of rock mechanics and the interlayer interface near the wellbore cannot restrain the growth of fracture height effectively, but has a significant impact on the fracture width distribution in the fracture height direction. Hydraulic fractures in these reservoirs tend to penetrate into the adjacent layer in “step-like” form, but have a smaller width at the interface deflection, which hinders the transport of proppant in vertical direction, resulting in a poor effect of layer-crossing growth. In shale layers with dense laminae, hydraulic fractures tend to form “丰” or “井” shapes. If the perforated interval is large in rock strength and high in breakdown pressure, the main fracture is fully developed initially, large in width, and supported by enough sand. In contrast, if the perforated interval is low in strength and rich in laminae, the fracturing fluid filtration loss is large, the breakdown pressure is low, the main fracture will not open wide initially, and likely to have sand plugging. Proppant is mainly concentrated in the main hydraulic fractures with large width near the perforated layer, activated laminae, branch fractures and fractures in adjacent layers contain only a small amount of(or zero) proppant. The proppant is placed in a limited range on the whole. The limit width of fracture that proppant can enter is about 2.7 times the proppant particle size. 展开更多
关键词 shale oil thin interbedded reservoir rock mechanics lithologic interface hydraulic fracturing fracture shape proppant distribution
下载PDF
松辽盆地北部基岩储层有效性评价技术
14
作者 高涛 王春燕 +2 位作者 王海燕 金雪英 覃豪 《特种油气藏》 CAS CSCD 北大核心 2024年第2期57-65,共9页
针对松辽盆地北部基岩岩性复杂、储层致密、裂缝发育以及储层参数计算精度低、储层有效性评价难等问题,提出“原岩+成分+结构”的三维岩性识别新方法;利用声波-密度交会图计算斜率M,利用中子-密度交会图计算斜率N,建立了基于M、N的变骨... 针对松辽盆地北部基岩岩性复杂、储层致密、裂缝发育以及储层参数计算精度低、储层有效性评价难等问题,提出“原岩+成分+结构”的三维岩性识别新方法;利用声波-密度交会图计算斜率M,利用中子-密度交会图计算斜率N,建立了基于M、N的变骨架密度有效孔隙度模型;通过研究基岩导电机理,校正裂缝附加导电性,建立了含裂缝储层含气饱和度模型;综合考虑有效孔隙度、次生孔隙度及裂缝发育程度,确定了基岩储层有效厚度标准及有效储层分类标准。应用结果表明:该套技术岩性解释符合率可达87.5%,气层识别符合率达88.5%,孔隙度、饱和度计算精度满足储量规范要求。研究结果可为松辽盆地北部基岩储层地质勘探及储量评价提供技术保障。 展开更多
关键词 基岩储层 储层有效性评价 岩性识别 有效孔隙度 含气饱和度 储层分类 松辽盆地
下载PDF
川东地区龙潭组页岩岩性序列及勘探意义
15
作者 姚永君 肖高杰 +6 位作者 范兴燕 胡国恒 黎李 王欣 张兵 杨凯 肖威 《地质科学》 CAS CSCD 北大核心 2024年第1期166-179,共14页
川东地区龙潭组具有较大的页岩气勘探前景,该地层沉积于海陆过渡环境,沉积相变化快,岩性复杂,存在难以通过常规的矿物成分方法划分岩相以及当前岩相划分尚不精确的问题,制约了该地区龙潭组页岩有利岩相带识别及勘探。本文基于岩心观察... 川东地区龙潭组具有较大的页岩气勘探前景,该地层沉积于海陆过渡环境,沉积相变化快,岩性复杂,存在难以通过常规的矿物成分方法划分岩相以及当前岩相划分尚不精确的问题,制约了该地区龙潭组页岩有利岩相带识别及勘探。本文基于岩心观察、野外剖面实测和薄片鉴定,结合钻井的泥地比、单层岩性厚度,建立了川东地区龙潭组7种特征岩性组合模式(泥页岩型、富泥含砂型、富泥含灰型、灰泥互层型、富灰含泥型、致密灰岩型和火成岩型);综合TOC、孔隙度、含气性、脆性指数等页岩储层特征参数,明确了不同岩性组合在龙潭组各段的平面分布规律。研究表明,纵向上优势岩性组合主要为龙潭一段富泥含灰型和泥页岩型,龙潭二段主要为泥页岩型、灰泥互层型和富泥含灰型。平面上龙潭一段优势岩性组合富泥含灰型主要分布在开州—云阳一带,泥页岩型主要分布在重庆—綦江一带;龙潭二段优势岩性组合泥页岩型分布在巴南—綦江一带,灰泥互层型分布在达州一带,富泥含灰型分布在万州—梁平—石柱一带。该项研究成果为川东地区龙潭组页岩气勘探提供了重要依据。 展开更多
关键词 川东地区 龙潭组 岩性组合 优势页岩储层 勘探意义
下载PDF
致密砂岩气藏与页岩气藏展布模式
16
作者 戴金星 董大忠 +7 位作者 倪云燕 龚德瑜 黄士鹏 洪峰 张延玲 刘全有 吴小奇 冯子齐 《石油勘探与开发》 EI CAS CSCD 北大核心 2024年第4期667-678,共12页
在阐述美国和中国致密砂岩气和页岩气资源潜力和年产量的基础上,系统梳理致密砂岩气藏与页岩气藏展布的研究沿革,分析页岩气藏、致密砂岩气藏展布特征及致密砂岩气成因类型。研究表明:(1)美国致密砂岩气在天然气总产量中占比由2008年的... 在阐述美国和中国致密砂岩气和页岩气资源潜力和年产量的基础上,系统梳理致密砂岩气藏与页岩气藏展布的研究沿革,分析页岩气藏、致密砂岩气藏展布特征及致密砂岩气成因类型。研究表明:(1)美国致密砂岩气在天然气总产量中占比由2008年的35%降至2023年的8%左右;美国页岩气2023年产量为8310×10^(8)m^(3),在天然气总产量中占比由2000—2008年的5%~17%升至2023年的70%以上。(2)中国致密砂岩气占天然气总产量比例由2010年的16%升至2023年的28%以上;2012年中国开始生产页岩气,2023年产量达250×10^(8)m^(3),约占天然气全国总产量的11%。(3)页岩气藏展布模式为连续型,根据页岩气藏是否有断层切割及断距与气层厚度的关系,连续型页岩气藏可分为连续式和断续式两种。(4)与以往大部分学者认为致密砂岩气藏展布模式为连续型的认识不同,致密砂岩气藏展布模式不是连续型;根据圈闭类型,致密砂岩气藏可分为岩性型、背斜型和向斜型3种。(5)中国3大克拉通盆地和埃及Obavied次盆的致密砂岩气为煤成气,美国阿巴拉契亚盆地和阿曼迦巴盐盆地的致密砂岩气为油型气。 展开更多
关键词 页岩气 致密砂岩气 气藏特征 连续型成藏 岩性型成藏 背斜型成藏 向斜型成藏 煤成气 油型气
下载PDF
重庆涪陵北部二叠系富有机质沉凝灰岩层系地质特征及甜点区优选
17
作者 董清源 徐旭辉 李国发 《石油实验地质》 CAS CSCD 北大核心 2024年第1期64-74,共11页
重庆涪陵北部二叠系吴家坪组二段(吴二段)沉凝灰岩是一种新型富有机质烃源岩,是非常规气藏勘探的新领域。明确吴二段沉凝灰岩层系关键甜点参数的分布是勘探评价的首要问题。通过钻测录井、实验分析及地震等资料,从沉凝灰岩层系的有机地... 重庆涪陵北部二叠系吴家坪组二段(吴二段)沉凝灰岩是一种新型富有机质烃源岩,是非常规气藏勘探的新领域。明确吴二段沉凝灰岩层系关键甜点参数的分布是勘探评价的首要问题。通过钻测录井、实验分析及地震等资料,从沉凝灰岩层系的有机地球化学特征、岩性特征、厚度分布、地层压力及裂缝发育等成藏富集地质条件入手,聚焦岩性品质及可压缝网两个关键因素,优中选优,评价目标甜点区。研究结果表明:涪陵北部吴二段沉凝灰岩层系处于深水陆棚相,有机质丰度高,TOC含量主要为5%~6%,Ro为1.90%~2.44%,有机质类型以Ⅰ和Ⅱ型为主,TOC含量大于4%的优质沉凝灰岩段厚度在15~20 m之间,分布面积广;优质沉凝灰岩段储集空间多样,孔隙度较高,脆性矿物含量较高,地层压力系数为高—超高压级别,同时转折端发育小型—微型裂缝带,体现了良好的“自生自储”含气勘探潜力;涪陵北部吴二段沉凝灰岩层系气藏具有优质控富、超压控藏及缝网控甜的规律。结合主控因素初步建立吴二段沉凝灰岩层系甜点评价标准,优选出3个目标甜点区,面积达186.4 km2,其中研究区西北部L2-L1井区油气显示良好,可以作为近期勘探的有利目标。 展开更多
关键词 沉凝灰岩层系 岩性品质 储层预测 甜点优选 吴二段 涪陵北部 重庆
下载PDF
塔里木盆地哈拉哈塘—哈得地区中生界物源转换及沉积充填响应
18
作者 易珍丽 石放 +5 位作者 尹太举 李斌 李猛 刘柳 王铸坤 余烨 《岩性油气藏》 CAS CSCD 北大核心 2024年第5期56-66,共11页
通过矿物成分分析、砂地比计算、地震属性分析及测井响应特征识别等技术手段,对塔里木盆地哈拉哈塘—哈得地区中生界典型沉积时期的古地貌形态、沉积体系展布、地层及砂体发育特征等进行了研究。研究结果表明:(1)塔里木盆地哈拉哈塘—... 通过矿物成分分析、砂地比计算、地震属性分析及测井响应特征识别等技术手段,对塔里木盆地哈拉哈塘—哈得地区中生界典型沉积时期的古地貌形态、沉积体系展布、地层及砂体发育特征等进行了研究。研究结果表明:(1)塔里木盆地哈拉哈塘—哈得地区三叠系物源主要来自东北部的天山造山带,其ZTR系数由东北部向凹陷中央逐渐增大;侏罗系和白垩系物源主要来自东南部和南部的昆仑山造山带,其ZTR系数由北部、南部向凹陷中央逐渐增大。(2)三叠纪晚期,随着古特提斯洋的增生,研究区北部天山的隆升强度减弱与南部昆仑山的隆升强度增大是此次物源转换的主要原因。(3)三叠纪,研究区的沉降-沉积中心位于南部,主要发育了一套北东—南西向的辫状河三角洲—深水湖泊沉积;侏罗纪和白垩纪,沉降-沉积中心则跃迁到研究区北部,主要发育了一套南东—北西向和南—北向的辫状河三角洲—浅水湖泊沉积。(4)三叠纪,砂体叠置样式的前积方向主要为北东—南西方向;侏罗纪和白垩纪,砂体叠置样式的前积方向主要为南东—北西方向和南—北方向。(5)三叠系岩性油气藏主要发育于研究区西南部,侏罗系和白垩系岩性油气藏主要发育于研究区西北部和北部。 展开更多
关键词 物源转换 沉积充填-叠置样式 地震属性 重矿物ZTR系数 隆升强度 岩性油气藏 中生界 哈拉哈塘—哈得地区 塔里木盆地
下载PDF
基于量子衍生涡流算法和T⁃S模糊推理模型的储层岩性识别
19
作者 赵娅 管玉 +1 位作者 李盼池 王伟 《石油地球物理勘探》 EI CSCD 北大核心 2024年第1期23-30,共8页
鉴于梯度下降法易陷入局部极值、普通群智能优化算法易早熟收敛,提出一种基于量子衍生涡流算法(Quantum Vortex Search Algorithm,QVSA)和T⁃S模糊推理模型的岩性识别方法,QVSA具有操作简单、收敛速度快、寻优能力强等优点,有助于T⁃S模... 鉴于梯度下降法易陷入局部极值、普通群智能优化算法易早熟收敛,提出一种基于量子衍生涡流算法(Quantum Vortex Search Algorithm,QVSA)和T⁃S模糊推理模型的岩性识别方法,QVSA具有操作简单、收敛速度快、寻优能力强等优点,有助于T⁃S模糊推理模型获得最优参数配置,从而实现储层岩性的准确识别。首先利用具有全局搜索能力的QVSA优化T⁃S模糊推理模型的各种参数;然后利用主成分分析方法降低获取的地震属性维度;再利用优化的T⁃S模糊推理模型识别储层岩性。实验结果表明,利用反映储层特征的8个地震属性识别储层岩性时,所提方法的识别正确率达到92%,比普通BP网络方法高5.1%,同时查准率、查全率、F1分数等指标也较BP网络方法提升明显。 展开更多
关键词 储层岩性识别 量子衍生涡流算法 T⁃S 模糊推理模型 模糊集 地震属性
下载PDF
东濮凹陷北部古近系沙三段超压岩性油气藏成藏机理
20
作者 张磊 李莎 +5 位作者 罗波波 吕伯强 谢敏 陈新平 陈冬霞 邓彩云 《岩性油气藏》 CAS CSCD 北大核心 2024年第4期57-70,共14页
东濮凹陷深部储层致密,超压广泛发育,油气生运聚过程复杂。利用测井、录井、钻井及地球化学分析等资料,对东濮凹陷北部古近系沙三段超压的形成机制、超压对源岩与储层的影响以及油气运移动力进行了系统研究,并阐明深层超压岩性油气藏的... 东濮凹陷深部储层致密,超压广泛发育,油气生运聚过程复杂。利用测井、录井、钻井及地球化学分析等资料,对东濮凹陷北部古近系沙三段超压的形成机制、超压对源岩与储层的影响以及油气运移动力进行了系统研究,并阐明深层超压岩性油气藏的成藏机理。研究结果表明:(1)东濮凹陷北部古近系沙三段超压岩性油气藏类型主要包括砂岩上倾尖灭油气藏、砂岩透镜体油气藏、裂缝油气藏3种纯岩性油气藏和岩性-构造油气藏、构造-岩性油气藏2种复合油气藏。岩性油气藏主要分布于东濮凹陷北部地区,尤其在前梨园洼陷、海通集洼陷、柳屯洼陷及濮城—卫城洼陷周边,具有“环洼有序分布”的特征。(2)研究区厚层膏盐岩发育及生烃过程产生的深层超压对烃源岩的生烃具有抑制作用,有效扩大了生油窗,增强了深部源岩的生烃能力,促进了其对环洼岩性油气藏的大规模近源供烃;膏盐岩发育、早期快速埋藏、超压的抗压实作用和晚期发育的溶蚀作用控制了优质储层的分布;深部广泛发育的超压和浮力协同作用为深层油气运移提供了有效动力。(3)研究区东部洼陷带为“单洼单源、早混相晚气相、自生自储、超压驱动运聚”成藏模式;东部陡坡带为“单洼多源、早混相晚气相、超压-浮力驱动侧向运聚”成藏模式;西部斜坡带为“单洼多源、油相、超压-浮力驱动侧向运聚”成藏模式;西部洼陷带为“单洼单源、油相、超压-浮力驱动侧向运聚”成藏模式。 展开更多
关键词 岩性油气藏 近源供烃 膏盐岩 超压驱动 浮力驱动 侧向运聚 沙三段 古近系 东濮凹陷
下载PDF
上一页 1 2 87 下一页 到第
使用帮助 返回顶部