东濮凹陷文留地区煤成气运聚机理及成藏过程
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摘要
文留地区是渤海湾盆地典型的煤成气区之一,随着勘探认识的不断深入,研究区煤成气运聚成藏过程的精细刻画仍需完善。运用流体包裹体技术分析文留地区煤成气成藏时间,基于断层活动特征明确研究区输导体系演化特征,根据断—盖组合关系及烃类流体包裹体丰度(GOI)测试结果分析气藏保存条件,最终明确文留地区煤成气成藏过程。研究表明,文东断层为研究区气源断层,其输导供烃条件可用断层输导效率系数(FTEC)进行量化表征,评价结果表明研究区具有优越的气源供给条件;文留地区煤成气来源于临近的洼陷带,煤成气在东营组沉积时期沿文东断层垂向运移至石炭—二叠系和沙四段储层聚集成藏,东营末构造抬升期气藏受构造运动影响而发生少量天然气散失。
The Wenliu area is one of the typical coal-formed gas accumulation zones in the Bohai Bay Basin. With the deepening of exploration, the fine characterization of the coal-forming gas accumulation process in this area still needs to be improved. The fluid inclusion technology was used to analyze the coal-formed gas accumulation date in Wenliu area. Based on the analysis of fault activity, the evolution characteristics of the transport system in the study area were determined. The gas-fluid inclusion abundance(GOI) test were used to analyze the gas preservation conditions, and finally the process of coal-formed gas accumulation in Wenliu area was carried out. The results show that the Wendong fault is a gas source fault in the study area, and its hydrocarbon supply conditions can be characterized by the Fault Transport Efficiency Coefficient(FTEC). The study area has superior gas supply conditions; the coal-formed gas in Wenliu area originates from the adjacent deep sag zone, and vertically transports along the Wendong fault to the Carboniferous-Permian and the Es4 sandstone reservoirs in the trap during the sedimentary period of the Dongying Formation. Small amount of the coal-formed gas loss occurred during the tectonic uplifting movements in the late sedimentary period of the Dongying Formation.
The Wenliu area is one of the typical coal-formed gas accumulation zones in the Bohai Bay Basin. With the deepening of exploration, the fine characterization of the coal-forming gas accumulation process in this area still needs to be improved. The fluid inclusion technology was used to analyze the coal-formed gas accumulation date in Wenliu area. Based on the analysis of fault activity, the evolution characteristics of the transport system in the study area were determined. The gas-fluid inclusion abundance(GOI) test were used to analyze the gas preservation conditions, and finally the process of coal-formed gas accumulation in Wenliu area was carried out. The results show that the Wendong fault is a gas source fault in the study area, and its hydrocarbon supply conditions can be characterized by the Fault Transport Efficiency Coefficient(FTEC). The study area has superior gas supply conditions; the coal-formed gas in Wenliu area originates from the adjacent deep sag zone, and vertically transports along the Wendong fault to the Carboniferous-Permian and the Es4 sandstone reservoirs in the trap during the sedimentary period of the Dongying Formation. Small amount of the coal-formed gas loss occurred during the tectonic uplifting movements in the late sedimentary period of the Dongying Formation.
引文
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[12] 刘辉, 胡修权, 梁家驹, 等. 准噶尔盆地准中4区块侏罗系断裂特征及对油气成藏的控制作用[J]. 地质论评, 2018, 64(6): 1489～1504.LIU Hui, HU Xiuquan, LIANG Jiaju, et al. Characteristics of Jurassic fault and its control effect on hydrocarbon accumulation in the Block 4 in the Middle of the Junggar Basin[J]. Geological Review, 2018, 64(6): 1489～1504. (in Chinese with English abstract)
[13] 吴孔友, 赵仲祥, 崔世凌, 等. 夏口断层对惠民南部地区油气成藏的控制作用[J]. 地质力学学报, 2012, 18(1): 32～41.WU Kongyou, ZHAO Zhongxiang, CUI Shiling, et al. Controlling of Xiakou fault on hydrocarbon accumulation in the southern part of Huimin depression[J]. Journal of Geomechanics, 2012, 18(1): 32～41. (in Chinese with English abstract)
[14] 刘景东, 蒋有录, 谈玉明, 等. 渤海湾盆地东濮凹陷膏盐岩与油气的关系[J]. 沉积学报, 2014, 32(1): 126～137.LIU Jingdong, JIANG Youlu, TAN Yuming, et al. Relationship between gypsum-salt rock and oil-gas in Dongpu Depression of Bohai Gulf Basin[J]. Acta Sedimentologica Sinica, 2014, 32(1): 126～137. (in Chinese with English abstract)
[15] 付广, 王浩然, 胡欣蕾. 断裂带盖层油气封盖断接厚度下限的预测方法及其应用[J]. 中国石油大学学报(自然科学版), 2015, 39(3): 30～37.FU Guang, WANG Haoran, HU Xinlei. Prediction method and application of caprock faulted-contact thickness lower limit for oil-gas sealing in fault zone[J]. Journal of China University of Petroleum, 2015, 39(3): 30～37. (in Chinese with English abstract)
[2] 常俊合, 李新军, 何江, 等. 东濮凹陷文古2井天然气地球化学特征及成因研究[J]. 天然气地球科学, 2005, 16(5): 608～611.CHANG Junhe, LI Xinjun, HE Jiang, et al. Researches on characteristics of geochemistry and formation of Wengu 2 well natural gas in Dongpu Depression[J]. Natural Gas Geoscience, 2005, 16(5): 608～611. (in Chinese with English abstract)
[3] Jiang Y L, Liu H, Song G Q, et al. Differential hydrocarbon enrichment and its main controlling factors in depressions of the Bohai Bay Basin[J]. Acta Geologica Sinica (English Edition), 2017, 91(5): 1855～1872.
[4] 蒋有录, 胡洪瑾,谈玉明,等. 东濮凹陷北部地区古近系油型气成因类型及分布特征[J]. 中国石油大学(自然科学版), 2017, 41(3): 42～48.JIANG Youlu, HU Hongjin, TAN Yuming, et al. Genesis and distrubution of paleogene oil-type goes in the Northern Dongpu Represcion[J]. Journal of China University of Petroleum (Ediaion of Natural Science), 2017, 41(3): 42～48. (in Chinese with English abstract)
[5] 戴金星, 戚厚发. 我国煤成烃气的δ13C—Ro关系[J]. 科学通报, 1989, 34(9): 690～692.DAI Jinxing, QI Houfa. Relationship between δ13C and Ro of coal-formed gas in China[J]. Chinese Science Bulletin, 1989, 34(9): 690～692. (in Chinese)
[6] Jiang Y L, Fang L, Liu J D, et al. Hydrocarbon charge history of the Paleogene reservoir in the northern Dongpu Depression, Bohai Bay Basin, China[J]. Petroleum Science, 2016, 13(4): 625～641.
[7] Jiang F J, Pang X Q, Yu S, et al. Charging history of Paleogene deep gas in the Qibei sag, Bohai Bay Basin, China[J]. Marine and Petroleum Geology, 2015, 67: 617～634.
[8] 董会, 王志海, 董敏, 等. 激光拉曼光谱在有机包裹体研究中的应用——以苏里格气田西部盒8段油气包裹体为例[J]. 地质力学学报, 2017, 23(4): 594～601.DONG Hui, WANG Zhihai, DONG Min, et al. Application of laser Raman spectroscopy in the study of organic inclusions: a case study on oil and gas inclusions in the 8th member of the Shihezi formation in western Sulige Gasfield[J]. Journal of Geomechanics, 2017, 23 4): 594～601. (in Chinese with English abstract)
[9] Yang P, Xie Y, Wang Z J, et al. Fluid activity and hydrocarbon accumulation period of Sinian Dengying Formation in northern Guizhou, South China[J]. Petroleum Exploration and Development, 2014, 41(3): 346～357.
[10] 蒋有录, 房磊, 谈玉明, 等. 渤海湾盆地东濮凹陷不同区带油气成藏期差异性及主控因素[J]. 地质论评, 2015, 61(6): 1321～1331.JIANG Youlu, FANG Lei, TAN Yuming, et al. Differences and main controlling factors of accumulation periods in Dongpu sag, Bohai Bay Basin[J]. Geological Review, 2015, 61(6): 1321～1331. (in Chinese with English abstract)
[11] 吴孔友, 查明, 王绪龙, 等. 准噶尔盆地莫索湾地区断层控油作用[J]. 地质力学学报, 2005, 11(1): 60～66.WU Kongyou, ZHA Ming, WANG Xulong, et al. Fault controls on oil and gas in the Mosuowan area, Junggar basin[J]. Journal of Geomechanics, 2005, 11(1): 60～66. (in Chinese with English abstract)
[12] 刘辉, 胡修权, 梁家驹, 等. 准噶尔盆地准中4区块侏罗系断裂特征及对油气成藏的控制作用[J]. 地质论评, 2018, 64(6): 1489～1504.LIU Hui, HU Xiuquan, LIANG Jiaju, et al. Characteristics of Jurassic fault and its control effect on hydrocarbon accumulation in the Block 4 in the Middle of the Junggar Basin[J]. Geological Review, 2018, 64(6): 1489～1504. (in Chinese with English abstract)
[13] 吴孔友, 赵仲祥, 崔世凌, 等. 夏口断层对惠民南部地区油气成藏的控制作用[J]. 地质力学学报, 2012, 18(1): 32～41.WU Kongyou, ZHAO Zhongxiang, CUI Shiling, et al. Controlling of Xiakou fault on hydrocarbon accumulation in the southern part of Huimin depression[J]. Journal of Geomechanics, 2012, 18(1): 32～41. (in Chinese with English abstract)
[14] 刘景东, 蒋有录, 谈玉明, 等. 渤海湾盆地东濮凹陷膏盐岩与油气的关系[J]. 沉积学报, 2014, 32(1): 126～137.LIU Jingdong, JIANG Youlu, TAN Yuming, et al. Relationship between gypsum-salt rock and oil-gas in Dongpu Depression of Bohai Gulf Basin[J]. Acta Sedimentologica Sinica, 2014, 32(1): 126～137. (in Chinese with English abstract)
[15] 付广, 王浩然, 胡欣蕾. 断裂带盖层油气封盖断接厚度下限的预测方法及其应用[J]. 中国石油大学学报(自然科学版), 2015, 39(3): 30～37.FU Guang, WANG Haoran, HU Xinlei. Prediction method and application of caprock faulted-contact thickness lower limit for oil-gas sealing in fault zone[J]. Journal of China University of Petroleum, 2015, 39(3): 30～37. (in Chinese with English abstract)