廊固凹陷构造油气成藏规律研究与区带优选

发布时间：2019-07-04 07:39

【摘要】：廊固凹陷油气勘探对象以构造类型为主,随着勘探程度逐渐提高,发现规模油气储量的难度越来越大。第四次资源评价认为,该凹陷剩余石油资源量1.72×108t,剩余天然气资源量954×108m3,具备较大的资源潜力。因此,进一步深化构造油气成藏规律研究,构建合理的成藏模式,优选有利区带,可为下步勘探提供依据。本文结合前人研究成果,以凹陷整体连片三维地震数据体为基础,综合运用石油地质学、层序地层学、沉积学等理论知识,对廊固凹陷的构造特征、烃源岩体系、储层及储盖组合特征开展整体重新认识,进一步明确了凹陷的基本石油地质特征。通过解剖典型油气藏,精细落实有利构造圈闭的分布,明确了廊固凹陷烃源岩分布范围宏观上控制油气富集区域,断裂构造特征控制油气聚集,砂体类型与断层、不整合面耦合控制油气成藏等油气成藏规律,并创新构建了大柳泉鼻状构造带侧生旁储-远源供烃-圈闭控藏成藏、下生上储-混源供烃-断层控藏成藏,河西务构造带平台式地垒反向断块、中央断垒带双向供烃垒断块等油气成藏模式,从而优选出大柳泉构造带、河西务构造带作为下步勘探的有利区带。
[Abstract]:The main oil and gas exploration objects in Langgu sag are structural types. With the gradual improvement of exploration degree, it is more and more difficult to discover large-scale oil and gas reserves. The fourth resource evaluation shows that the remaining oil resources and natural gas resources in the sag are 1.72 脳 108t and 954 脳 108m3, respectively, which have great resource potential. Therefore, further deepening the study of structural oil and gas accumulation law, constructing a reasonable reservoir forming model and optimizing favorable zones can provide the basis for further exploration. Based on the previous research results and the theoretical knowledge of petroleum geology, sequence stratigraphy and sedimentology, the structural characteristics, source rock system, reservoir and cap rock assemblage characteristics of Langgu sag are reunderstood in this paper, and the basic petroleum geological characteristics of the sag are further clarified by using the theoretical knowledge of petroleum geology, sequence stratigraphy and sedimentology. By dissecting typical oil and gas reservoirs and fine implementing the distribution of favorable structural traps, it is clear that the distribution range of source rocks in Langgu sag controls oil and gas accumulation area macroscopically, fault structure characteristics control oil and gas accumulation, sand body type and fault, unconformity surface coupling control oil and gas accumulation, and innovatively constructs lateral side reservoir, far source hydrocarbon supply and trap reservoir formation in Daliuquan nose structural belt. The oil and gas accumulation models, such as the lower upper reservoir-mixed source hydrocarbon supply-fault controlled reservoir formation, the platform barrier reverse fault block and the central fault base zone, are selected, so that the Daliuquan structural belt and the Hexiwu structural belt are selected as the favorable zone for the next exploration.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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