大情字井青一段油气富集控制因素
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摘要
为探究大情字井地区青一段复杂地质条件下的油气富集特征、控制因素、油气藏类型及下一步勘探方向等工作,结合大情字井地区沉积背景,并以石油地质学、沉积学、油气田开发地质学等理论作为指导,研究认为大情字井青一段具备形成规模性油藏的条件,古地貌演化与生油岩的生油范围及生烃阶段控制了油气成藏的基础,成藏期正向古构造控制了油气富集带,条带形水下分支河道砂体与指状河口坝砂体等有利储层控制了油气储存,油气运移场控制了油气优势运移方向,广泛分布的优质区域盖层控制了油气藏保存,不同生储盖组合方式为多种油藏形成提供了条件。将大情字井青一段油藏类型划分为:大型岩性上倾尖灭带控制的岩性上倾尖灭型油藏;反向正断层控制的断层遮挡型油藏;正断层与岩性共同控制的断块—岩性型油藏。
In order to explore the characteristics of oil and gas accumulation, the controling factors, reservoir types and the next exploration targets in the complex geologic conditions of Qing Ⅰ member, Qingshankou formation in Daqingzijing oilfield, in the background of the Daqingzijing oilfield, this paper takes theories of petroleum geology, sedimentology, and oil and gas field development geology as guidance. The research shows that this area has the conditions for the formation of large-scale reservoirs of Qing Ⅰ member, Qingshankou formation in Daqingzijing oilfield. The evolution of palaeogeomorphy, the oil generation range of the source rock and the hydrocarbon generation stage control the foundation of oil and gas accumulation. During the accumulation period, the positive palaeostructure controls the hydrocarbon accumulation zone. The strip-shaped subaqueous distributary channel sand-body, the finger-shaped estuary dam sand-body and other favorable reservoirs control oil and gas storage. The oil and gas migration field controls the dominant hydrocarbon migration direction. Widely distributed and high-quality regional cap rock control the preservation of oil and gas reservoirs. The different source-reservoir-cap assemblages provide conditions for the formation of multiple reservoirs. These different reservoirs are divided into the following three types: The lithologic updip pinch out reservoir which is located in large lithologic updip pinch out area; Fault screened reservoir which is screened by the reverse normal faults; Fault block-lithologic reservoir which is screened by the normal faults and the pinch out sand.
In order to explore the characteristics of oil and gas accumulation, the controling factors, reservoir types and the next exploration targets in the complex geologic conditions of Qing Ⅰ member, Qingshankou formation in Daqingzijing oilfield, in the background of the Daqingzijing oilfield, this paper takes theories of petroleum geology, sedimentology, and oil and gas field development geology as guidance. The research shows that this area has the conditions for the formation of large-scale reservoirs of Qing Ⅰ member, Qingshankou formation in Daqingzijing oilfield. The evolution of palaeogeomorphy, the oil generation range of the source rock and the hydrocarbon generation stage control the foundation of oil and gas accumulation. During the accumulation period, the positive palaeostructure controls the hydrocarbon accumulation zone. The strip-shaped subaqueous distributary channel sand-body, the finger-shaped estuary dam sand-body and other favorable reservoirs control oil and gas storage. The oil and gas migration field controls the dominant hydrocarbon migration direction. Widely distributed and high-quality regional cap rock control the preservation of oil and gas reservoirs. The different source-reservoir-cap assemblages provide conditions for the formation of multiple reservoirs. These different reservoirs are divided into the following three types: The lithologic updip pinch out reservoir which is located in large lithologic updip pinch out area; Fault screened reservoir which is screened by the reverse normal faults; Fault block-lithologic reservoir which is screened by the normal faults and the pinch out sand.
引文
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[10] 姜福全. 大情字井油田低幅度构造成藏可能性研究——微观特征对油气成藏影响[J]. 中国石油和化工标准与质量, 2012(10): 138.
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[2] 杨明达, 杨铭辉, 唐振兴, 等. 松辽盆地南部大情字井地区油气分布控制因素分析[J]. 石油实验地质, 2003(3): 252-256.
[3] 梁春秀, 王永春, 康伟力, 等. 现代勘探新技术在隐蔽油气藏勘探中的作用——松辽盆地大情字井超亿吨级油田的发现[J]. 中国石油勘探探, 2003(3): 58-65.
[4] 赵世新. 大情字井特低渗透油田油水运动规律[J]. 油气田地面工程, 2012, 31(12): 28-29.
[5] 张大伟, 贾庆素. 大情字井地区青一段沉积微相分布特征[J]. 断块油气田, 2006(6): 1-3.
[6] 韦乐乐, 刘秀婷, 彭喜明, 等. 鄂尔多斯盆地东南部三叠—侏罗纪裂缝研究[J]. 西部探矿工程, 2014, 26(5): 118-120.
[7] Nouidar M, Chellay E H. Facies and sequence stratigrapliy of a Late Barremian wave-dominated deltaic deposit, Agadir Basin[J]. Morocco Sedirnentary Geology, 2002, 150(3/4): 375-384.
[8] 刘宝柱, 孙万军, 陈少军, 等. 松辽盆地南部中浅层油气藏的成藏史[J]. 现代地质, 2003(1): 87-91.
[9] 郭巍, 于文祥, 刘招君, 等. 松辽盆地南部埋藏史[J]. 吉林大学学报(地球科学版), 2009(3): 353-360.
[10] 姜福全. 大情字井油田低幅度构造成藏可能性研究——微观特征对油气成藏影响[J]. 中国石油和化工标准与质量, 2012(10): 138.
[11] 柳广弟(主编). 石油地质学[M]. 北京: 石油工业出版社, 2009.