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岩屑荧光系统下砂岩目标的识别与分类
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作者 崔康宁 滕奇志 +1 位作者 吴晓红 何海波 《微型机与应用》 2014年第3期38-40,43,共4页
岩屑的砂岩部分是整个岩屑含油的集中区域,但是在岩屑的荧光图像中,由于岩屑颗粒的边界不明显,很难准确地得到砂岩目标,因此影响后续含油组分分析的准确性。岩屑荧光系统通过对岩屑样本同一个视域下的白光图像进行边缘流处理,得到砂岩目... 岩屑的砂岩部分是整个岩屑含油的集中区域,但是在岩屑的荧光图像中,由于岩屑颗粒的边界不明显,很难准确地得到砂岩目标,因此影响后续含油组分分析的准确性。岩屑荧光系统通过对岩屑样本同一个视域下的白光图像进行边缘流处理,得到砂岩目标,再与系统生成的训练文件作对比分析,从而得到岩屑样本的含油组分分析。 展开更多
关键词 岩屑荧光图像 边缘流分割 边缘流矢量 砂岩识别
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杭锦旗地区杭南区块J6井区砂岩体的识别 被引量:1
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作者 张玲玲 袁建国 +1 位作者 林晓芬 郭新 《石油物探》 EI CSCD 2005年第3期233-235,共3页
杭锦旗地区杭南区块构造简单,勘探程度较低,储层为隐蔽性岩性圈闭,井位选取比较困难。为此,采用综合识别方法对该区块J6井区的砂岩体进行了识别,并进行了含油气性预测。①通过对地震剖面反射特征的分析,确定反射异常带;②通过对测井曲... 杭锦旗地区杭南区块构造简单,勘探程度较低,储层为隐蔽性岩性圈闭,井位选取比较困难。为此,采用综合识别方法对该区块J6井区的砂岩体进行了识别,并进行了含油气性预测。①通过对地震剖面反射特征的分析,确定反射异常带;②通过对测井曲线特征的分析、岩性对比和地震模型正演,对异常进行解释;③利用波阻抗反演、地震属性分析技术,圈定砂岩体的展布范围;④通过对沉积环境、烃源岩、封堵性的研究,分析砂岩体的含气性,确定是否为岩性圈闭。最终解释结果为J6井山1段底部的砂岩体含气。 展开更多
关键词 地震反射特征 测井曲线特征 地震属性 模型正演 砂岩识别 岩性圈闭
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巧解砂岩分类三角图 被引量:10
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作者 张萌 黄思静 +6 位作者 冯文新 王雷 郑文宝 詹新 韩军铮 程振兴 彭靖松 《成都理工大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第4期423-429,共7页
在充分对比砂岩等边三角形和等腰三角形两种分类方案投点图的基础上,尝试从两种不同的思路对砂岩三角形分类方案投点图计算模型进行了推导,即直线方程推导模型和相似三角形推导模型,提出了更为简单的砂岩分类三角图投点计算模型。该计... 在充分对比砂岩等边三角形和等腰三角形两种分类方案投点图的基础上,尝试从两种不同的思路对砂岩三角形分类方案投点图计算模型进行了推导,即直线方程推导模型和相似三角形推导模型,提出了更为简单的砂岩分类三角图投点计算模型。该计算模型只与石英和岩屑的含量有关,而与三角图本身的形状(等腰或等边三角形)没有直接的关系。再根据Microsoft Excel所提供的逻辑函数建立了砂岩类型的自动识别模型,使大数据量砂岩的分类统计变得更加准确而快捷。最后通过对大数据量储集砂岩骨架组分的定量实例研究,验证了所建立的砂岩分类自动识别模型,以及砂岩分类三角图投点简化计算模型的良好效果。 展开更多
关键词 砂岩分类三角图 砂岩碎屑成分投点 等边三角形分类方案 等腰三角形分类方案 砂岩类型的自动识别模型
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变权重的高自然伽马曲线校正法及其在靖安地区长6油层的应用
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作者 陈守民 李传浩 +3 位作者 王碧涛 郑家钰 王建国 杨璐菁 《石油地质与工程》 CAS 2018年第3期64-67,共4页
砂岩中局部存在的高放射性物质引起的自然伽马曲线异常高值特征,往往会导致无法利用自然伽马曲线准确区分砂岩和泥岩,同时如果没有自然伽马能谱、地层元素俘获谱等校正原始自然伽马,最终会引起对油气藏地质规律的错误认识。为此,基于自... 砂岩中局部存在的高放射性物质引起的自然伽马曲线异常高值特征,往往会导致无法利用自然伽马曲线准确区分砂岩和泥岩,同时如果没有自然伽马能谱、地层元素俘获谱等校正原始自然伽马,最终会引起对油气藏地质规律的错误认识。为此,基于自然电位、自然伽马和地层密度的砂泥岩响应机理的互补性,提出了一种变权重的自然伽马曲线重构法。该方法适用于校正因砂岩局部富集钍、铀和钾元素引起的自然伽马曲线异常高值。在鄂尔多斯盆地三叠系长6油层组的应用效果表明,该方法能够有效克服由于钍、铀异常高值导致的原始自然伽马遗漏砂岩的难题,提高了砂岩识别精度。 展开更多
关键词 鄂尔多斯盆地 长6油层组 砂岩识别 自然伽马曲线校正
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泌阳凹陷陡坡带高精度三维地震攻关研究与效果 被引量:2
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作者 张永华 杨道庆 +3 位作者 罗家群 李连生 赵雨晴 季玉摇 《石油地球物理勘探》 EI CSCD 北大核心 2009年第A01期110-114,共5页
在分析泌阳凹陷南部陡坡带地质与地震资料的基础上,认为该区寻找岩性油气藏是主要目标。文中针对该区资料品质差、边界大断裂地震资料处理归位不准确、深层资料信噪比低、圈闭落实程度低等问题,实施了新的攻关方向:①优化三维地震采集... 在分析泌阳凹陷南部陡坡带地质与地震资料的基础上,认为该区寻找岩性油气藏是主要目标。文中针对该区资料品质差、边界大断裂地震资料处理归位不准确、深层资料信噪比低、圈闭落实程度低等问题,实施了新的攻关方向:①优化三维地震采集因素及观测系统设计;②开展叠前深度偏移处理,建立准确的偏移速度模型,使地震数据正确归位;③综合采用层序地层学、精细构造解释、地震相技术、相干体沿层属性、油井约束反演等各种地球物理技术,对陡坡带砂岩体储层进行预测和综合评价。查明了一批不同深度、不同类型的局部圈闭,经部署钻探,在陡坡带浅、中、深层均发现油层,勘探效果显著,在栗园地区新增探明石油地质储量828.29万t,在梨树凹地区新增预测石油地质储量385.79万t,为油田增储稳产起到了积极作用。 展开更多
关键词 泌阳凹陷 陡坡带 观测系统设计 高精度 叠前深度偏移 综合解释 砂岩识别
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Log identification method in complex sand reservoirs 被引量:3
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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
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Quantitative identification of relatively highlevel radioactive sandstone in the Upper Triassic Yanchang Formation of the Ordos Basin, China 被引量:2
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作者 Li Ya-Jun Zhang Xiao-Li Yan Yuan-Zi 《Applied Geophysics》 SCIE CSCD 2019年第3期314-320,395,396,共9页
Most relatively high-level radioactive sandstone(HRSS)reservoir has considerable oil(or gas)resource potential.HRSS is often wrongly identified due to its similar logging response characteristics as mudstone,which lea... Most relatively high-level radioactive sandstone(HRSS)reservoir has considerable oil(or gas)resource potential.HRSS is often wrongly identified due to its similar logging response characteristics as mudstone,which leads to the omission of effective reservoirs.In this paper,a quantitative identification method for HRSS is proposed after the analyzing of the response characteristics and relationship between spontaneous potential log and natural gamma-ray log in conventional sandstone and mudstone strata.Take the Upper Triassic Yanchang Formation in Ordos Basin as an example:the responses of spontaneous potential log and the responses of natural gamma-ray log are synchronized and positively correlated in conventional sandstone and mudstone strata,but they are not synchronized in HRSS.Quantitative identification of HRSS was realized based on this synchronization feature,and a"virtual compensation"of natural gamma-ray log was performed.At the same time,logging evaluation method about HRSS has been discussed.The final results shows that this identification method work effectively,and can reduce the misjudgment and omission of effective reservoirs. 展开更多
关键词 relatively high-level radioactive sandstone quantitative identification virtual compensation of radioactivity Ordos Basin Upper Triassic Yanchang Formation
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Fluids discrimination by ray-path elastic impedance inversion: A successful case from Sulige tight gas field 被引量:1
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作者 Wang Da-Xing Wang Hao-Fan +3 位作者 Ma Jin-Feng Wang Yong-Gang Zhang Na Li Lin 《Applied Geophysics》 SCIE CSCD 2019年第2期218-232,254,共16页
Existing seismic prediction methods struggle to effectively discriminate between fluids in tight gas reservoirs,such as those in the Sulige gas field in the Ordos Basin,where porosity and permeability are extremely lo... Existing seismic prediction methods struggle to effectively discriminate between fluids in tight gas reservoirs,such as those in the Sulige gas field in the Ordos Basin,where porosity and permeability are extremely low and the relationship between gas and water is complicated.In this paper,we have proposed a comprehensive seismic fluid identification method that combines ray-path elastic impedance(REI)inversion with fluid substitution for tight reservoirs.This approach is grounded in geophysical theory,forward modeling,and real data applications.We used geophysics experiments in tight gas reservoirs to determine that Brie's model is better suited to calculate the elastic parameters of mixed fluids than the conventional Wood’s model.This yielded a more reasonable and accurate fluid substitution model for tight gas reservoirs.We developed a forward model and carried out inversion of REI.which reduced the non-uniqueness problem that has plagued elastic impedance inversion in the angle domain.Our well logging forward model in the ray-path domain with different fluid saturations based on a fluid substitution model proved that REI identifies fluids more accurately when the ray parameters are large.The distribution of gas saturation can be distinguished from the crossplot of REI(p=0.10)and porosity.The inverted ray-path elastic impedance profile was further used to predict the porosity and gas saturation profile.Our new method achieved good results in the application of 2D seismic data in the western Sulige gas field. 展开更多
关键词 tight gas reservoir ray-path elastic impedance fluids identification rock-physical model gas saturation inversion
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