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Surface-functionalized cellulose nanocrystals(CNC)and synergisms with surfactant for enhanced oil recovery in low-permeability reservoirs 被引量:1
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作者 Zhe Li Wan-Li Kang +6 位作者 Meng-Lan Li Hong-Bin Yang Tong-Yu Zhu Ying-Qi He Hai-Zhuang jang Bo-Bo Zhou Ji-Ting Hao 《Petroleum Science》 SCIE EI CAS CSCD 2023年第3期1572-1583,共12页
Nanocellulose,a natural polymeric nanomaterial,has attracted significant attention in enhanced oil recovery(EOR)applications due to its abundance,nanoscale,high oil-water interfacial adsorption ef-ficiency.In this stu... Nanocellulose,a natural polymeric nanomaterial,has attracted significant attention in enhanced oil recovery(EOR)applications due to its abundance,nanoscale,high oil-water interfacial adsorption ef-ficiency.In this study,surface-functionalized cellulose nanocrystals(SF-CNCs)were prepared via hy-drochloric acid hydrolysis and chemical modification,with adaptable nanosize and considerable dispersion stability in low-permeability reservoirs.The SF-CNCs were structurally characterized by FT-IR,Cryo-TEM,which have a diameter of 5-10 nm and a length of 100-200 nm.The SF-CNC dispersions possessed higher stability and stronger salt-tolerance than those of corresponding CNC dispersions,due to the strong hydrophilicity of the sulfonic acid group.It was synergistically used with a non-ionic surfactant(APG1214)to formulate a combined flooding system(0.1 wt%SF-CNC+0.2 wt%APG1214).The combined flooding system exhibits strong emulsification stability,low oil-water interfacial tension of o.03 mN/m,and the ability to alter the wettability for oil-wetting rocks.Furthermore,the combined system was_able to provide an optimum EOR efficiency of 20.2%in low-permeability cores with 30.13×10^(-3)μm^(2).Notably.it can enlarge the sweep volume and increase the displacement efficiency simultaneously.Overall,the newly formulated nanocellulose/surfactant combined system exhibits a remarkable EoR performance in low-permeability reservoirs. 展开更多
关键词 low-permeability reservoirs Enhanced oil recovery Cellulose nanocrystals(CNC) SURFACTANT Dispersion stability
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Characteristics and mechanisms of supercritical CO_(2) flooding under different factors in low-permeability reservoirs 被引量:6
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作者 Zheng Chen Yu-Liang Su +2 位作者 Lei Li Fan-Kun Meng Xiao-Mei Zhou 《Petroleum Science》 SCIE CAS CSCD 2022年第3期1174-1184,共11页
In recent years,supercritical CO_(2)flooding has become an effective method for developing lowpermeability reservoirs.In supercritical CO_(2)flooding different factors influence the mechanism of its displacement proce... In recent years,supercritical CO_(2)flooding has become an effective method for developing lowpermeability reservoirs.In supercritical CO_(2)flooding different factors influence the mechanism of its displacement process for oil recovery.Asynchronous injection-production modes can use supercritical CO_(2)to enhance oil recovery but may also worsen the injection capacity.Cores with high permeability have higher oil recovery rates and better injection capacity,however,gas channeling occurs.Supercritical CO_(2)flooding has a higher oil recovery at high pressure levels,which delays the occurrence of gas channeling.Conversely,gas injection has lower displacement efficiency but better injection capacity at the high water cut stage.This study analyzes the displacement characteristics of supercritical CO_(2)flooding with a series of experiments under different injection and production parameters.Experimental results show that the gas breakthrough stage has the fastest oil production and the supercritical CO_(2)injection capacity variation tendency is closely related to the gas-oil ratio.Further experiments show that higher injection rates represent significant ultimate oil recovery and injection index,providing a good reference for developing low-permeability reservoirs. 展开更多
关键词 low-permeability reservoir Supercritical CO_(2)flooding Influence mechanism Enhanced oil recovery Injection capacity
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Study on Optimal Water ControlMethods for Horizontal Wells in Bottom Water Clastic Rock Reservoirs
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作者 Xianghua Liu Hai Song +3 位作者 Lu Zhao Yan Zheng Neng Yang Dongling Qiu 《Fluid Dynamics & Materials Processing》 EI 2024年第10期2377-2392,共16页
The segmented water control technology for bottom water reservoirs can effectively delay the entry of bottom water and adjust the production profile.To clarify the impact of different methods on horizontal well produc... The segmented water control technology for bottom water reservoirs can effectively delay the entry of bottom water and adjust the production profile.To clarify the impact of different methods on horizontal well production with different reservoir conditions and to provide theoretical support for the scientific selection of methods for bottom water reservoirs,a numerical simulation method is presented in this study,which is able to deal with wellbore reservoir coupling under screen tube,perforation,and ICD(Inflow Control Device)completion.Assuming the geological characteristics of the bottom-water conglomerate reservoir in the Triassic Formation of the Tahe Block 9 as a test case,the three aforementioned completion methods are tested to predict the transient production characteristics.The impact of completion parameters,reservoir permeability,bottom-water energy,and individual well control on the time to encounter water in horizontal wells(during a water-free production period)is discussed.A boundary chart for the selection of completion methods is introduced accordingly.The results show that the optimized ICD completion development effect for heterogeneous reservoirs is the best,followed by optimized perforation completion.Permeability is the main factor affecting the performances of completion methods,while bottom water energy and single well controlled reserves have a scarce impact.The average permeability of the reservoir is less than 500 mD,and ICD has the best water control effect.If the permeability is greater than 500 mD,the water control effect of perforation completion becomes a better option. 展开更多
关键词 Completion method bottom water low-permeability oil reservoir horizontal well development effect
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Prolific Oil and Gas Reservoirs Discovered in Extremely Shallow Sea in Dagang
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《China Oil & Gas》 CAS 1999年第4期226-226,共1页
ProlificoilandgasflowswereobtainedfromWellGangshen78intheextremelyshallowseaareaonNovember22.Adailyoilproductionof542.58m3andadailygasproductionof90500m3wererecordedona12.7mmchoke.Itisreportedthattheproducingformation... ProlificoilandgasflowswereobtainedfromWellGangshen78intheextremelyshallowseaareaonNovember22.Adailyoilproductionof542.58m3andadailygasproductionof90500m3wererecordedona12.7mmchoke.ItisreportedthattheproducingformationinWellGangshen78doesnotbelongtoth... 展开更多
关键词 Prolific oil and Gas reservoirs Discovered in Extremely Shallow sea in Dagang
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Formation conditions of Neogene large-scale high-abundance lithologic reservoir in the Laibei low uplift,Bohai Sea,East China 被引量:1
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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
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深地、深海油气藏储量评估中针对不确定性的可靠技术选择与应用
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作者 何晨毓 肖玉茹 +1 位作者 黄学斌 刘丽琼 《中国石油勘探》 CAS CSCD 北大核心 2024年第4期166-174,共9页
对于新领域和复杂类型油气藏,储量评估关键参数的确定意义重大,也是勘探开发的难点和重点,建立可靠技术开展储量评估是目前国际主流做法,但国内强调勘探开发主体技术却少有关于储量评估可靠技术的研究。近年来国内石油公司不断在近万米... 对于新领域和复杂类型油气藏,储量评估关键参数的确定意义重大,也是勘探开发的难点和重点,建立可靠技术开展储量评估是目前国际主流做法,但国内强调勘探开发主体技术却少有关于储量评估可靠技术的研究。近年来国内石油公司不断在近万米深层和水深超过500m海域取得重大油气突破,在勘探评价阶段发现的超深层大型碳酸盐岩缝洞型油气藏和深海油气藏储量评估面临资料有限、投资约束和井控程度低等问题,如何选择或建立可靠技术开展储量评估已成为该领域的研究重点。从可靠技术的定义和适用性出发,重点针对深海和深地油气藏勘探投资大、不能大面积部署探井,以及深地和深海油气藏储量评估过程中的复杂性、特殊性及不确定性,开展可靠技术在储量评估关键参数选取中的适用条件和应用范围研究,通过典型案例解剖认为,深海油气藏地震振幅随偏移距变化(AVO)、直接烃指标(DHI)和压力系统法等可靠技术可识别油气藏的油水界面,4个区块验证成功率高达92%,应用该技术降低了勘探评价阶段的投资及开发风险。深地缝洞型碳酸盐岩油气藏利用地震敏感属性分析技术确定含油气边界和含油气面积,该技术通过钻井放空漏失、测井解释结果和生产动态等证实储层预测的可靠性较高,地震储层预测与实钻吻合率达84%,从而使储量评估结果更加接近油藏实际,确保了少井情况下储量评估结果的合理性,同时也推动了可靠技术在储量评估领域的应用。 展开更多
关键词 可靠技术 深海油气藏 深地缝洞型碳酸盐岩油气藏 储量评估
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渤海海域明下段岩性油藏油柱高度分布规律及影响因素
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作者 王德英 刘庆顺 +2 位作者 汤国民 刘泽宇 陶莉 《中国海上油气》 CAS CSCD 北大核心 2024年第4期37-48,共12页
渤海海域明下段岩性油藏特征、储量规模差异大,油柱高度作为油藏评价的关键参数,直接影响油藏储量规模,其分布规律及影响因素认识不清。基于渤海海域约460个明下段岩性油藏勘探开发数据,在充分了解地质背景的基础上,利用统计手段并结合... 渤海海域明下段岩性油藏特征、储量规模差异大,油柱高度作为油藏评价的关键参数,直接影响油藏储量规模,其分布规律及影响因素认识不清。基于渤海海域约460个明下段岩性油藏勘探开发数据,在充分了解地质背景的基础上,利用统计手段并结合地球化学证据,厘清了浅层明下段岩性油藏油柱高度空间展布规律,通过进一步分析油柱高度与油气充注强度、区域盖层展布、圈闭类型和断砂耦合程度等成藏要素关系,明确了油柱高度影响因素。结果表明:①受油气充注强度控制,明下段岩性油藏油柱高度平面上具有“凸起区小、凹陷区大”特征,平均油柱高度相差约2倍;②受区域盖层控制,纵向上具有“盖层之上油柱高度小、盖层之下油柱高度大”特征,下部Ⅲ/Ⅳ油组平均油柱高度为Ⅰ/Ⅱ油组约2倍;③受油气汇聚部位与侧封保存能力控制,高点依靠断裂侧封油藏油柱高度普遍高于岩性尖灭油藏的油柱高度,平均油柱高度相差约2.5倍;④明下段油气成藏受断砂耦合程度影响,但凸起区与凹陷区断裂油气运移能力差异较大,凸起区切穿馆陶组区域油气输导层断裂可起到运移作用,而凹陷区切穿深部汇聚脊的断裂才可作为有效的油源断裂。渤海海域明下段岩性油藏油柱高度分布规律及影响因素,对后续岩性油藏价值勘探、精细勘探具有借鉴意义。 展开更多
关键词 岩性油藏 油柱高度 明下段 分布规律 渤海海域
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新构造运动对渤海凸起区、斜坡—洼陷区浅层油气最终成藏的控制作用
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作者 米立军 徐建永 +2 位作者 刘志峰 朱文奇 吴斌 《中国石油勘探》 CAS CSCD 北大核心 2024年第1期92-105,共14页
浅层新近系馆陶组—明化镇组为渤海的主力含油气层系。新构造运动是渤海新生代晚期发生的对油气成藏影响最为深刻的构造事件,对浅层油气成藏的影响远大于深层,控制了渤海浅层油气最终成藏。研究表明,新构造运动导致的凹陷晚期快速生排... 浅层新近系馆陶组—明化镇组为渤海的主力含油气层系。新构造运动是渤海新生代晚期发生的对油气成藏影响最为深刻的构造事件,对浅层油气成藏的影响远大于深层,控制了渤海浅层油气最终成藏。研究表明,新构造运动导致的凹陷晚期快速生排烃、多种类型圈闭发育、油气运移活跃等,整体上调整、控制了浅层油气藏的定型和分布,但对不同构造带浅层油气成藏的控制作用存在差异。根据构造位置和油气成藏特点,可将渤海浅层油气藏归为两大类:凸起区浅层油气藏、斜坡—洼陷区浅层油气藏。通过系统分析两类构造带浅层油气的成藏特点,明确新构造运动对两类构造带油气最终成藏的控制作用与富集模式差异,并构建了相应成藏模式。凸起区的浅层具有“晚期油源断层+浅层稳定储盖组合”的“台阶”型油气成藏模式;斜坡—洼陷区的浅层具有“洼中隆+晚期断层”“深层运移脊+晚期断层”两种“倒漏斗”型油气成藏模式。渤海浅层已进入了以岩性油气藏为主的勘探阶段,应加强新构造运动控制下的“晚期运移断层+岩性圈闭”组合勘探。 展开更多
关键词 新构造运动 渤海 浅层油气藏 凸起区 斜坡—洼陷区 成藏模式 “倒漏斗”型
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胜利滩浅海油田高效开发技术进展及展望
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作者 翟亮 刘丽 +2 位作者 胡晨彬 张海娜 唐晓红 《油气地质与采收率》 CAS CSCD 北大核心 2024年第5期66-76,共11页
胜利滩浅海油田位于海陆交汇处,以埕岛油田、新北油田为典型代表,具有油藏类型多样、地面条件复杂、海工配套投资大的特点,效益开发难。立足胜利滩浅海油田开发实践,重点梳理了“十一五”以来技术成果,经过持续技术攻关,形成了以滩浅海... 胜利滩浅海油田位于海陆交汇处,以埕岛油田、新北油田为典型代表,具有油藏类型多样、地面条件复杂、海工配套投资大的特点,效益开发难。立足胜利滩浅海油田开发实践,重点梳理了“十一五”以来技术成果,经过持续技术攻关,形成了以滩浅海油田细分加密综合调整、滩浅海油田整体注采调控、海油陆采高效开发、滩浅海边际油藏有效动用、复杂裂缝性潜山油藏开发为核心的胜利特色滩浅海油田高效开发技术,建成国内首个400万吨级滩浅海油田——埕岛油田,实现了从陆上到海上的跨越。通过剖析滩浅海油田目前高质量发展面临的问题,明确了在新区效益建产与老区提高采收率技术支撑上面临的挑战。作为胜利油田持续上产的重要阵地,针对未来滩浅海油田面临的上产需求与未动用储量品位低以及老区稳产基础与液量受限两大挑战,提出了滩浅海油田“少井高产、高速高效”的发展方向,即持续攻关滩浅海复式油气藏效益动用、基于平台集约化的“3+2”开发方式下的二次井网重构、基于大模型的智能注采调控等关键技术,支撑胜利滩浅海油田高质量持续发展。 展开更多
关键词 滩浅海油田 高效开发 埕岛油田 整体注采调控 边际油田 裂缝性潜山油藏
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南海西部原油领域勘探进展与突破方向
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作者 邓勇 胡德胜 +4 位作者 游君君 满勇 满晓 陈林 付大巍 《中国海上油气》 CAS CSCD 北大核心 2024年第3期11-24,共14页
南海西部原油领域历经多年勘探,探明程度高,勘探难度日益增大。近年来,转变思路,大力拓展新领域。攻关岩性圈闭发育机制,建立了流三段“低位转换带控砂,湖侵互层叠置连片”的广覆式砂体沉积模式,阐明了大面积连片岩性圈闭形成机理,创建... 南海西部原油领域历经多年勘探,探明程度高,勘探难度日益增大。近年来,转变思路,大力拓展新领域。攻关岩性圈闭发育机制,建立了流三段“低位转换带控砂,湖侵互层叠置连片”的广覆式砂体沉积模式,阐明了大面积连片岩性圈闭形成机理,创建了“近源广覆式有序富集”成藏模式,发现南海西部首个大中型岩性油田;攻关深层大型储集体和优质储层发育机制,建立构造-层序-地貌耦合控砂分析技术,提出了限制型辫状河三角洲发育模式,明确了相带与溶蚀差异控储机制,涠西南凹陷B洼深层、乌石凹陷反转构造带倾末端、文昌B凹陷双古领域获得了勘探突破。同时明确了大型构造脊大型储集体耦合的深层领域、富烃凹陷周缘地层-岩性圈闭领域、源储对接潜山领域和烃源条件落实边部凹陷是南海西部原油领域下步重点勘探方向。 展开更多
关键词 南海西部 涠西南凹陷 乌石凹陷 文昌B凹 勘探进展 岩性油藏 涠洲11-6 中深层
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油气同采对北海B油田开发的影响及气锥控制方法研究
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作者 许晨 《石化技术》 CAS 2024年第10期223-225,共3页
对于气顶油藏开发的独特性及复杂性,以英国北海B油田的开发实践为例,研究北海海上气顶油藏在开发过程中油气同采对开发效果造成的影响,并针对气锥这一突出问题提出矿场实际解决方法。主要通过利用井口流压与海底汇管压力差及油井生产参... 对于气顶油藏开发的独特性及复杂性,以英国北海B油田的开发实践为例,研究北海海上气顶油藏在开发过程中油气同采对开发效果造成的影响,并针对气锥这一突出问题提出矿场实际解决方法。主要通过利用井口流压与海底汇管压力差及油井生产参数关系,建立模型,实时识别气锥发生油井并有效控制气锥对生产造成的影响,实现北海海上油田合规高效开发。 展开更多
关键词 英国北海 海上气顶油气藏 气锥控制 油气田开发
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Hydrate phase transition and seepage mechanism during natural gas hydrates production tests in the South China Sea:A review and prospect 被引量:1
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作者 Xu-wen Qin Cheng Lu +1 位作者 Ping-kang Wang Qian-yong Liang 《China Geology》 2022年第2期201-217,共17页
Natural gas hydrates(NGHs)are globally recognized as an important type of strategic alternative energy due to their high combustion efficiency,cleanness,and large amounts of resources.The NGHs reservoirs in the South ... Natural gas hydrates(NGHs)are globally recognized as an important type of strategic alternative energy due to their high combustion efficiency,cleanness,and large amounts of resources.The NGHs reservoirs in the South China Sea(SCS)mainly consist of clayey silts.NGHs reservoirs of this type boast the largest distribution range and the highest percentage of resources among NGHs reservoirs in the world.However,they are more difficult to exploit than sandy reservoirs.The China Geological Survey successfully carried out two NGHs production tests in the Shenhu Area in the northern SCS in 2017 and 2020,setting multiple world records,such as the longest gas production time,the highest total gas production,and the highest average daily gas production,as well as achieving a series of innovative theoretical results.As suggested by the in-depth research on the two production tests,key factors that restrict the gas production efficiency of hydrate dissociation include reservoir structure characterization,hydrate phase transition,multiphase seepage and permeability enhancement,and the simulation and regulation of production capacity,among which the hydrate phase transition and seepage mechanism are crucial.Study results reveal that the hydrate phase transition in the SCS is characterized by low dissociation temperature,is prone to produce secondary hydrates in the reservoirs,and is a complex process under the combined effects of the seepage,stress,temperature,and chemical fields.The multiphase seepage is controlled by multiple factors such as the physical properties of unconsolidated reservoirs,the hydrate phase transition,and exploitation methods and is characterized by strong methane adsorption,abrupt changes in absolute permeability,and the weak flow capacity of gas.To ensure the long-term,stable,and efficient NGHs exploitation in the SCS,it is necessary to further enhance the reservoir seepage capacity and increase gas production through secondary reservoir stimulation based on initial reservoir stimulation.With the constant progress in the NGHs industrialization,great efforts should be made to tackle the difficulties,such as determining the micro-change in temperature and pressure,the response mechanisms of material-energy exchange,the methods for efficient NGHs dissociation,and the boundary conditions for the formation of secondary hydrates in the large-scale,long-term gas production. 展开更多
关键词 Natural gas hydrates Clayey silt reservoir Hydrate phase transition Seepage mechanism oil and gas exploration engineering NGHs exploration trial engineering South China sea China
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东海盆地K区平湖组断层侧向封闭性评价及对油气成藏的控制作用 被引量:1
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作者 孙鹏 李宁 +2 位作者 胡欣蕾 刘禹 袁红旗 《上海国土资源》 2023年第2期140-147,共8页
为准确评价东海盆地K区平湖组断层侧向封闭性及其对油气成藏的控制作用,基于前人对断层侧向封闭性机制、影响因素的分析,从断层侧向封闭类型出发,分别针对岩性对接型及断层岩型封闭断层建立评价模型及下限,以此开展断层侧向封闭性评价,... 为准确评价东海盆地K区平湖组断层侧向封闭性及其对油气成藏的控制作用,基于前人对断层侧向封闭性机制、影响因素的分析,从断层侧向封闭类型出发,分别针对岩性对接型及断层岩型封闭断层建立评价模型及下限,以此开展断层侧向封闭性评价,并以N-1井区为例开展封闭性对油气成藏的控制作用分析。研究结果表明:K区平湖组断层侧向封闭类型以断层岩型封闭为主,断层封闭性受断层岩泥质含量(SGR)影响,封闭下限值为15%;纵向上平湖组断层岩SGR值自下而上逐渐降低,封闭能力逐渐变差,部分封闭断层逐渐转为开启;平面上K区中北部长时间活动的大规模断层侧向封闭能力明显强于南部断层。考虑到断层的侧向封闭性与油气能否在储层中聚集成藏是两个相互制约的地质要素,只有当断层岩SGR值介于15%~58%时,断层侧向封闭且储层发育,受断层遮挡的相关圈闭才能成为油气聚集成藏的有效圈闭。研究成果对明确东海盆地K区油气成藏规律,降低钻探风险具有较高的理论和实践意义。 展开更多
关键词 东海盆地 平湖组地层 断层 封闭性评价 断层岩泥质含量 控藏作用 油气储层
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Characteristics and mechanism of smart fluid for sweep-controlling during CO_(2) flooding
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作者 XIONG Chunming WEI Falin +5 位作者 YANG Haiyang ZHANG Song DING Bin LEI Zhengdong ZHANG Deping ZHOU Qiang 《Petroleum Exploration and Development》 SCIE 2023年第3期741-750,共10页
A smart response fluid was designed and developed to overcome the challenges of gas channeling during CO_(2)flooding in low-permeability,tight oil reservoirs.The fluid is based on Gemini surfactant with self-assembly ... A smart response fluid was designed and developed to overcome the challenges of gas channeling during CO_(2)flooding in low-permeability,tight oil reservoirs.The fluid is based on Gemini surfactant with self-assembly capabilities,and the tertiary amine group serves as the response component.The responsive characteristics and corresponding mechanism of the smart fluid during the interaction with CO_(2)/oil were studied,followed by the shear characteristics of the thickened aggregates obtained by the smart fluid responding to CO_(2).The temperature and salt resistance of the smart fluid and the aggregates were evaluated,and their feasibility and effectiveness in sweep-controlling during the CO_(2)flooding were confirmed.This research reveals:(1)Thickened aggregates could be assembled since the smart fluid interacted with CO_(2).When the mass fraction of the smart fluid ranged from 0.05%to 2.50%,the thickening ratio changed from 9 to 246,with viscosity reaching 13 to 3100 mPas.As a result,the sweep efficiency in low-permeability core models could be increased in our experiments.(2)When the smart fluid(0.5%to 1.0%)was exposed to simulated oil,the oil/fluid interfacial tension decreased to the level of 1×10^(-2)mN/m.Furthermore,the vesicle-like micelles in the smart fluid completely transformed into spherical micelles when the fluid was exposed to simulated oil with the saturation greater than 10%.As a result,the smart fluid could maintain low oil/fluid interfacial tension,and would not be thickened after oil exposure.(3)When the smart fluid interacted with CO_(2),the aggregates showed self-healing properties in terms of shear-thinning,static-thickening,and structural integrity after several shear-static cycles.Therefore,this fluid is safe to be placed in deep reservoirs.(4)The long-term temperature and salt resistance of the smart fluid and thickened aggregates have been confirmed. 展开更多
关键词 low-permeability reservoirs tight oil CO_(2)flooding sweep-controlling smart fluid fluid characteristics Gemini surfactant self-thickened SELF-HEALING
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反渗透钻井液在东海高压井的优化与应用 被引量:1
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作者 佘运虎 《石油化工应用》 CAS 2023年第8期24-28,共5页
随着油气田开发的进行,钻井井深不断增大,深部钻遇异常高压地层风险逐渐升高。为平衡地层压力,需要提高钻井液密度,而水基钻井液在高密度时容易出现泥浆增稠,泥饼质量变差,滤失量增大等问题。本文通过优选包被剂及加量、降滤失剂加量,... 随着油气田开发的进行,钻井井深不断增大,深部钻遇异常高压地层风险逐渐升高。为平衡地层压力,需要提高钻井液密度,而水基钻井液在高密度时容易出现泥浆增稠,泥饼质量变差,滤失量增大等问题。本文通过优选包被剂及加量、降滤失剂加量,对高密度下反渗透钻井液性能进行优化调整,使其抗温性能达到150℃,2.00 g/cm3密度条件流型良好,高温高压滤失量低于10.0 mL,以适应东海高压井钻井需求。现场应用结果显示,优化后的反渗透钻井液性能稳定,井壁稳定性良好,起下钻总体顺利,同时气测活跃,储层保护效果好,圆满完成了探勘开发目标,具有巨大的推广应用前景。 展开更多
关键词 反渗透 东海油气田 井壁稳定 高密度 储层保护
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基于微流控模型的渤海典型高渗砂岩储层油水赋存规律
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作者 孙鹏霄 蔡晖 +2 位作者 陈晓明 杨子由 姚君波 《特种油气藏》 CAS CSCD 北大核心 2023年第6期120-127,共8页
为进一步明确高渗砂岩储层水驱过程中微观油水赋存规律,通过扫描储层岩心,建立了渤海高渗砂岩微流控模型;基于形状因子和欧拉数等微观参数,编制计算程序,精细识别并提取膜状、滴状和柱状等5类剩余油的微观表征;针对不同流体物性及开发... 为进一步明确高渗砂岩储层水驱过程中微观油水赋存规律,通过扫描储层岩心,建立了渤海高渗砂岩微流控模型;基于形状因子和欧拉数等微观参数,编制计算程序,精细识别并提取膜状、滴状和柱状等5类剩余油的微观表征;针对不同流体物性及开发方式设计实验方案,明确了渤海典型高渗砂岩在不同原油性质及开发制度下微观油水赋存规律及演化特征。结果显示:随着剩余油非连续相增加,水淹范围内的绕流区、滞留区难以再动用,多孔和簇状剩余油成为主要的剩余油赋存形态;高速驱替水驱波及范围更大,但注入水绕流易导致采出端提前见水,波及范围不再显著增加;低黏储层中,高速驱替相较低速驱替波及系数提升0.154;高黏储层中,液流改向调整后水驱末期波及系数提高0.137。对于渤海油田典型储层物性及高含水开发阶段条件下,低黏储层更适合提高驱替速度进行挖潜,高黏储层适合液流改向进一步动用剩余油。研究结果为渤海油田水驱高效开发提供了借鉴。 展开更多
关键词 赋存规律 微流控模型 微观特征参数 剩余油 波及范围 高渗砂岩储层 渤海油田
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渤海海域东南部构造转换带分级及其差异控藏作用
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作者 高雁飞 王德英 +2 位作者 杨海风 宿雯 赵弟江 《中国海上油气》 CAS CSCD 北大核心 2023年第6期23-34,共12页
渤海东南部地区是渤海湾盆地油气最为富集的区域之一,受张家口—蓬莱、郯庐两组走滑断裂体系相互叠加的影响,研究区发育多种类型的构造转换带,控制了该区油气成藏与油气富集程度的差异。为弄清不同级别、不同类型构造转换带及其对油气... 渤海东南部地区是渤海湾盆地油气最为富集的区域之一,受张家口—蓬莱、郯庐两组走滑断裂体系相互叠加的影响,研究区发育多种类型的构造转换带,控制了该区油气成藏与油气富集程度的差异。为弄清不同级别、不同类型构造转换带及其对油气成藏的差异控制作用,依托24个油田200余口钻井资料,结合连片三维地震资料解释结果,对渤海海域东南部的构造转换带进行了分级、分类,并探讨了其差异控藏作用。首先依据构造转换带规模及其形成动力机制,将研究区构造转换带分为4个级别,渤海海域东南部地区为中生界先存构造被后期走滑改造而成的Ⅰ级转换带,Ⅰ级转换带内部进一步识别出Ⅱ级共轭型构造转换带、Ⅲ级叠覆型构造转换带、Ⅳ级S型构造转换带与断梢型构造转换带;分析总结了不同级次构造转换带对烃源岩、圈闭、运移与保存等油气成藏要素的差异控制作用及其差异控藏模式,Ⅱ级构造转换带主要控制烃源岩和油气深层优势汇聚方向,决定规模性有利富集区;Ⅲ级构造转换带主要控制规模性圈闭形成,决定油气优势富集场所;Ⅳ级构造转换带主要控制油气运移和保存,决定油气优势富集断块。该研究成果对海域同类型地区油气勘探具有较强的借鉴意义。 展开更多
关键词 构造转换带 分级 分类 差异控藏 大中型油气田 渤海海域东南部
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MRC储层改造技术在海上疏松砂岩稠油油藏剩余油挖潜中的应用
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作者 刘宁 杨光 杨继明 《石化技术》 CAS 2023年第12期33-34,49,共3页
油藏最大接触位移(MRC)储层改造技术可以增大原水平井段井控范围,改变流线方向,深挖局部剩余油,实现单井控水增油效果。A油田目前已进入特高含水阶段,剩余油高度分散,挖潜难度大,尤其是浅层疏松砂岩稠油油藏多口井出砂且治理难度大。S... 油藏最大接触位移(MRC)储层改造技术可以增大原水平井段井控范围,改变流线方向,深挖局部剩余油,实现单井控水增油效果。A油田目前已进入特高含水阶段,剩余油高度分散,挖潜难度大,尤其是浅层疏松砂岩稠油油藏多口井出砂且治理难度大。S井作为浅层疏松砂岩稠油油藏(M油藏)一口低产低效井,通过实施MRC储层改造技术成功实现了增产效果。该技术的成功应用为海上疏松砂岩稠油油藏剩余油挖潜开辟了新路径,具有广阔的应用价值。 展开更多
关键词 海上疏松砂岩 稠油油藏 特高含水 剩余油挖潜
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渤海锦州南变质岩潜山油藏储集层特征与发育控制因素 被引量:156
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作者 周心怀 项华 +2 位作者 于水 王刚 姚长华 《石油勘探与开发》 SCIE EI CAS CSCD 北大核心 2005年第6期17-20,共4页
渤海海域辽西低凸起锦州南(JZS)太古宇变质岩油藏是渤海海域最大的潜山油藏,岩性以片麻岩及其形成的碎裂岩为主。根据全井眼地层微电阻率扫描测井(FMI)及常规测井信息,将该变质岩潜山油藏储集层划分为4类:①网状缝-溶孔型;②角砾状破碎... 渤海海域辽西低凸起锦州南(JZS)太古宇变质岩油藏是渤海海域最大的潜山油藏,岩性以片麻岩及其形成的碎裂岩为主。根据全井眼地层微电阻率扫描测井(FMI)及常规测井信息,将该变质岩潜山油藏储集层划分为4类:①网状缝-溶孔型;②角砾状破碎型;③溶蚀裂缝型;④微裂缝-致密型。JZS油藏变质岩储集层发育经历了成岩阶段→前埋藏阶段→抬升剥蚀褶皱断裂阶段→表生阶段→后埋藏阶段,主要控制因素为新生界沉积前古地貌及中、新生代构造应力作用,风化残积物主要分布于局部高点的宽缓斜坡区,构造作用、表生期的风化淋沥作用和油气充注期有机酸溶解作用等对储集层形成与演化具有重要影响。JZS油藏变质岩储集层的演化模式对类似潜山油藏的勘探和开发方案设计具有借鉴意义。 展开更多
关键词 渤海海域 JZS油藏 变质岩潜山油藏 储集层特征 控制因素 演化模式
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南海北部新生代构造运动厘定及与油气成藏关系探讨 被引量:54
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作者 蔡周荣 刘维亮 +1 位作者 万志峰 郭峰 《海洋通报》 CAS CSCD 北大核心 2010年第2期161-165,共5页
通过分析并参考前人对南海构造运动的划分方案以及浅水区研究成果,结合深水区取得的最新认识,对新生代以来南海北部的构造运动重新进行厘定,共划分为四次构造运动:晚白垩世末的神狐运动、中始新世末开始的珠琼运动(包括一幕和二幕)、晚... 通过分析并参考前人对南海构造运动的划分方案以及浅水区研究成果,结合深水区取得的最新认识,对新生代以来南海北部的构造运动重新进行厘定,共划分为四次构造运动:晚白垩世末的神狐运动、中始新世末开始的珠琼运动(包括一幕和二幕)、晚渐新世末的南海运动以及中中新世末的东沙运动,并认为这四次构造运动对烃源岩的发育以及油气运聚成藏起着重要的控制作用。 展开更多
关键词 南海北部 新生代 构造运动 厘定 油气成藏
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