RESERVOIR ACCUMULATION DYNAMIC CONDITIONS OF CHANG 8 MEMBER IN THE SOUTHWEST MARGIN OF ORDOS BASIN
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摘要:
基于大量的新井钻探测试、声波测井及流体包裹体分析等资料，针对鄂尔多斯盆地西南缘长8段油气运移成藏动力机制不清的问题，以环县-彭阳及周缘地区深部异常压力为重点开展研究.结果表明：长7底部与长8上部普遍存在一定的剩余压力差，平面上压力分布特征与全盆地流体压力由中心向拗陷边缘逐渐减低的趋势相吻合.长7段烃源岩生烃作用产生的异常高压可驱使烃类向下以较大规模运移充注至长8储层，流体包裹体古压力模拟恢复出原油在充注进入长8段储层后仍具有一定的异常高压.整体上，与盆地内部相比，研究区源储剩余压差较小，但仍然是作为西南缘长8段油气成藏动力的主要机制.期待该研究能更进一步认识盆缘低渗致密油的成藏机理和分布规律，为拓展勘探领域提供参考.
Abstract:Based on massive data from new well drilling tests, acoustic logging and fluid inclusion analysis, the deep abnormal pressure in Huanxian-Pengyang area and its surroundings are studied to find out the dynamic mechanism of hydrocarbon migration and accumulation of Chang 8 Member in the southwest margin of Ordos Basin. The results show that there is a certain residual pressure difference between the bottom of Chang 7 and the top of Chang 8 members. The plane distribution characteristics of pressure show a gradually decreasing from the center to depression margin, which are consistent with the trend of whole basin fluid pressure. The abnormal high pressure from hydrocarbon generation of source rocks in Chang 7 Member can cause the hydrocarbon to migrate downward on a large scale and charge into Chang 8 reservoir. The restored paleopressure of fluid inclusion by simulation shows that the crude oil still remains a certain abnormal high pressure after charging into Chang 8 reservoir. Compared with the interior of basin, despite the low residual pressure difference between source and reservoir on the whole, it is still the main hydrocarbon accumulation dynamic mechanism of Chang 8 Member in the southwest margin. It is expected that the study can help further understand the accumulation mechanism and distribution rule of low permeability tight oil in the basin margin, and provide reference for expanding exploration fields.
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Key words:
- accumulation dynamic /
- oil-gas migration /
- fluid inclusion /
- Yanchang Formation /
- Ordos Basin
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[1] 罗晓容. 油气成藏动力学研究之我见[J]. 天然气地球科学, 2008, 19(2): 149-156. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200802004.htm
Luo X R. Understandings on dynamical studies of hydrocarbon migration and accumulation[J]. Natural Gas Geoscience, 2008, 19(2): 149-156. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200802004.htm
[2] 姚泾利, 徐丽, 邢蓝田, 等. 鄂尔多斯盆地延长组长7和长8油层组流体过剩压力特征与油气运移研究[J]. 天然气地球科学, 2015, 26(12): 2219-2226. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201512002.htm
Yao J L, Xu L, Xing L T, et al. Fluid overpressure and oil migration in Chang 7 and Chang 8 subsections of Yanchang Formation in Ordos Basin, China[J]. Natural Gas Geoscience, 2015, 26(12): 2219-2226. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX201512002.htm
[3] 罗晓容. 油气运聚动力学研究进展及存在问题[J]. 天然气地球科学, 2003, 14(5): 337-346. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200305002.htm
Luo X R. Review of hydrocarbon migration and accumulation dynamics[J]. Natural Gas Geoscience, 2003, 14(5): 337-346. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200305002.htm
[4] 刘震, 陈凯, 朱文奇, 等. 鄂尔多斯盆地西峰地区长7段泥岩古压力恢复[J]. 中国石油大学学报(自然科学版), 2012, 36(2): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201202000.htm
Liu Z, Chen K, Zhu W Q, et al. Paleo-pressure restoration of Chang 7 shale in Xifeng area, Ordos Basin[J]. Journal of China University of Petroleum (Edition of Natural Science), 2012, 36(2): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201202000.htm
[5] 姚泾利, 赵彦德, 邓秀芹, 等. 鄂尔多斯盆地延长组致密油成藏控制因素[J]. 吉林大学学报(地球科学版), 2015, 45(4): 983-992. https://www.cnki.com.cn/Article/CJFDTOTAL-CCDZ201504002.htm
Yao J L, Zhao Y D, Deng X Q, et al. Controlling factors of tight oil reservoir in Triassic Yanchang Formation in Ordos Basin[J]. Journal of Jilin University (Earth Science Edition), 2015, 45(4): 983-992. https://www.cnki.com.cn/Article/CJFDTOTAL-CCDZ201504002.htm
[6] 张忠义, 陈世加, 杨华, 等. 鄂尔多斯盆地三叠系长7段致密油成藏机理[J]. 石油勘探与开发, 2016, 43(4): 590-599.
Zhang Z Y, Chen S J, Yang H, et al. Tight oil accumulation mechanisms of Triassic Yanchang Formation Chang 7 Member, Ordos Basin, China[J]. Petroleum Exploration and Development, 2016, 43(4): 590-599.
[7] 雷华伟, 韩华峰, 乔力, 等. 鄂尔多斯盆地靖边油田曹崾岘区延9油藏富集规律[J]. 地质与资源, 2018, 27(5): 466-471. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract8494.shtml
Lei H W, Han H F, Qiao L, et al. Enrichment regularity of Y-9 reservoir in Caoyaoxian area of Jingbian Oilfield, Ordos Basin[J]. Geology and Resources, 2018, 27(5): 466-471. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract8494.shtml
[8] 周琦. 陆相断陷盆地致密油藏特征与分类[J]. 地质与资源, 2019, 28(1): 30-34. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract8373.shtml
Zhou Q. Characteristics and classification of tight reservoir in continental fault basins[J]. Geology and Resources, 2019, 28(1): 30-34. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract8373.shtml
[9] 石玉江, 李高仁, 周金昱, 等. 鄂尔多斯盆地中生界延长组低渗透致密油藏充注模式测井识别[J]. 测井技术, 2016, 40(2): 202-208. https://www.cnki.com.cn/Article/CJFDTOTAL-CJJS201602019.htm
Shi Y J, Li G R, Zhou J Y, et al. Filling mode and corresponding log interpretation method for low permeability-tight reservoirs in Yanchang Group, Mesozoic, Ordos Basin[J]. Well Logging Technology, 2016, 40(2): 202-208. https://www.cnki.com.cn/Article/CJFDTOTAL-CJJS201602019.htm
[10] 高岗, 刚文哲, 范泓澈, 等. 含油气盆地异常低压成因研究现状[J]. 天然气地球科学, 2008, 19(3): 311-315. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200803002.htm
Gao G, Gang W Z, Fan H C, et al. Research advances for the genesis of abnormally low formation pressure in petroliferous basins[J]. Natural Gas Geoscience, 2008, 19(3): 311-315. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200803002.htm
[11] 杨飏, 郭正权, 黄锦绣, 等. 鄂尔多斯盆地西南部延长组过剩压力与油藏的关系[J]. 地球科学与环境学报, 2008, 28(2): 49-52. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX200602009.htm
Yang Y, Guo Z Q, Huang J X, et al. Overpressure relation to oilfields in Yanchang Formation SW Ordos Basin[J]. Journal of Earth Sciences and Environment, 2006, 28(2): 49-52. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX200602009.htm
[12] Hunt J M. Generation and migration of petroleum from abnormally pressured fluid compartments[J]. AAPG Bulletin, 1990, 74(1): 1-12.
[13] 宋兴沛, 刘洛夫, 徐正建, 等. 鄂尔多斯盆地中西部长7段烃源岩及致密油潜力评价[J]. 新疆石油地质, 2017, 38(5): 553-558. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201705009.htm
Song X P, Liu L F, Xu Z J, et al. Evaluation of source rocks and tight off exploration potential of Chang-7 Member in central and western Ordos Basin[J]. Xinjiang Petroleum Geology, 2017, 38(5): 553-558. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD201705009.htm
[14] 刘明洁, 刘震, 刘静静, 等. 砂岩储集层致密与成藏耦合关系——以鄂尔多斯盆地西峰-安塞地区延长组为例[J]. 石油勘探与开发, 2014, 41(2): 168-175. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201402006.htm
Liu M J, Liu Z, Liu J J, et al. Coupling relationship between sandstone reservoir densification and hydrocarbon accumulation: A case from the Yanchang Formation of the Xifeng and Ansai areas, Ordos Basin[J]. Petroleum Exploration and Development, 2014, 41(2): 168-175. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201402006.htm
[15] 刘新社, 席胜利, 黄道军, 等. 鄂尔多斯盆地中生界石油二次运移动力条件[J]. 石油勘探与开发, 2008, 35(2): 143-147. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200802003.htm
Liu X S, Xi S L, Huang D J, et al. Dynamic conditions of Mesozoic petroleum secondary migration, Ordos Basin[J]. Petroleum Exploration and Development, 2008, 35(2): 143-147. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200802003.htm
[16] 吴保祥, 段毅, 郑朝阳, 等. 鄂尔多斯盆地古峰庄-王洼子地区长9油层组流体过剩压力与油气运移研究[J]. 地质学报, 2008, 82(6): 844-849. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200806015.htm
Wu B X, Duan Y, Zheng Z Y, et al. Fluid overpressure and migration of oil and gas from Chang 9 Member in Gufengzhuang-Wangwazi area, Ordos basin[J]. Acta Geologica Sinica, 2008, 82(6): 844-849. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200806015.htm
[17] 吴凯, 李善鹏, 罗丽荣, 等. 特低渗-致密砂岩储层成藏模拟试验与成藏机理[J]. 地球科学与环境学报, 2013, 35(4): 10-17. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX201304004.htm
Wu K, Li S P, Luo L R, et al. Simulation experiment of petroleum migration and accumulation mechanism for extra-low permeability and tight sandstone reservoirs[J]. Journal of Earth Sciences and Environment, 2013, 35(4): 10-17. https://www.cnki.com.cn/Article/CJFDTOTAL-XAGX201304004.htm
[18] 郑民, 李建忠, 吴晓智, 等. 致密储集层原油充注物理模拟——以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组为例[J]. 石油勘探与开发, 2016, 43(2): 219-227. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201602008.htm
Zheng M, Li J Z, Wu X Z, et al. Physical modeling of oil charging in tight reservoirs: A case study of Permian Lucaogou Formation in Jimsar sag, Junggar Basin, NW China[J]. Petroleum Exploration and Development, 2016, 43(2): 219-227. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201602008.htm
[19] 刘德汉, 卢焕章, 肖贤明. 油气包裹体及其在石油勘探和开发中的应用[M]. 广州: 广东科技出版社, 2007: 109-111.
Liu D H, Lu H Z, Xiao X M. Oil and gas inclusions and its application in oil exploration and development[M]. Guangzhou: Guangdong Science and Technology Press, 2007: 109-111. (in Chinese)
[20] 杨智, 付金华, 郭秋麟, 等. 鄂尔多斯盆地三叠系延长组陆相致密油发现、特征及潜力[J]. 中国石油勘探, 2017, 22(6): 9-15. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201706002.htm
Yang Z, Fu J H, Guo Q L, et al. Discovery, characteristics and resource potential of continental tight oil in Triassic Yanchang Formation, Ordos Basin[J]. China Petroleum Exploration, 2017, 22(6): 9-15. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201706002.htm
[21] 郭凯, 曾溅辉, 刘涛涛. 鄂尔多斯盆地延长组石油充注动力的包裹体热动力学模拟[J]. 地质科技情报, 2015, 34(2): 152-158. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201502022.htm
Guo K, Zeng J H, Liu T T. Petroleum inclusion thermodynamic simulation on oil charging pressure of Yanchang Formation in Ordos Basin[J]. Geological Science and Technology Information, 2015, 34(2): 152-158. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201502022.htm
[22] 邓秀芹, 刘新社, 李士祥. 鄂尔多斯盆地三叠系延长组超低渗透储层致密史与油藏成藏史[J]. 石油与天然气地质, 2009, 30(2): 156-161. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200902009.htm
Deng X Q, Liu X S, Li S X. The relationship between compacting history and hydrocarbon accumulating history of the super-low permeability reservoirs in the Triassic Yanchang Formation in the Ordos Basin[J]. Oil & Gas Geology, 2009, 30(2): 156-161. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200902009.htm
[23] 李相博, 刘显阳, 周世新, 等. 鄂尔多斯盆地延长组下组合油气来源及成藏模式[J]. 石油勘探与开发, 2012, 39(2): 172-180. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201202007.htm
Li X B, Liu X Y, Zhou S X, et al. Hydrocarbon origin and reservoir forming model of the Lower Yanchang Formation, Ordos Basin[J]. Petroleum Exploration and Development, 2012, 39(2): 172-180. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201202007.htm
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