Hydrocarbon enrichment conditions and distribution in continental shale, West Liaohe Sag, Bohai Bay Basin
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摘要: 在大量泥页岩样品化验测试的基础上,分析了渤海湾盆地辽河西部凹陷页岩油气富集的条件,探讨了陆相裂谷盆地页岩油气分布特征和分布模式。研究认为,西部凹陷古近系沙四段和沙三段泥页岩累计厚度大、连续性好,有机质以腐泥型为主,发育一定量的腐殖型;有机质丰度高,TOC平均2.67%,热成熟度中等,Ro值0.4%~1.5%;泥页岩孔隙和裂缝较发育,孔隙以粒间孔和溶蚀孔最为发育,裂缝以构造缝和页理缝为主;储集物性好,含油气量高,具备页岩油气富集的基本条件。受沉积相、有机质类型与热成熟度联合控制,西部凹陷以发育页岩油为主,同时局部地区发育页岩气,页岩油气在纵向上和横向上有规律分布。纵向上,沙四段底部到沙三段上部地层依次发育页岩油气—页岩油—页岩气;横向上,断陷沉积中心以页岩油发育为主,盆地斜坡区为页岩油气频繁互层区域。Abstract: We analyzed the hydrocarbon enrichment conditions in shale in the West Liaohe Sag of Bohai Bay Basin, and discussed the distribution features and pattern of shale oil and gas in continental rift basins, based on the tests of a large number of shale samples. The shale in the third and fourth members of Paleogene Shahejie Formation in the West Liaohe Sag has a large total thickness, wide distribution, good continuity, high TOC content (average 2.67%), and medium maturity (0.4%-1.5%). Organic matter is mainly sapropelic, and partially of humic type. The shale developed considerable pores, mostly intergranular and dissolution pores, and tectonic (with some interlayer) fractures. Favorable physical properties of reservoirs and high hydrocarbon content made the study area a good place for shale oil and gas enrichment. Controlled by sedimentary facies, organic matter type and thermal maturity, the West Liaohe Sag mainly yields shale oil, and regionally shale gas. From the bottom of the fourth member to the upper part of the third member of the Shehejie Formation, we found shale oil and gas, shale oil, and shale gas in turn. In the basin center, we mainly found shale oil, while on the slope we found interbedded shale oil and gas.
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[1] Curtis J B.Fractured shale-gas systems[J].AAPG Bulletin,2002,86(11):1921-1938. [2] Mavor M.Barnett shale gas-in-place volume including sorbed and free gas volume//Proceedings of AAPG Southwest Section Meeting.Fort Worth,Texas:APPG,2003. [3] 张金川,金之钧,袁明生.页岩气成藏机理和分布[J].天然气工业,2004,24(7):15-18. Zhang Jinchuan,Jin Zhijun,Yuan Mingsheng.Reservoiring mechanism of shale gas and its distribution[J].Natural Gas Industry,2004,24(7):15-18. [4] 张金川,林腊梅,李玉喜,等.页岩油分类与评价[J].地学前缘,2012,19(5):322-331. Zhang Jinchuan,Lin Lamei,Li Yuxi,et al.Classification and evaluation of shale oil[J].Earth Science Frontiers,2012,19(5):322-331. [5] 王广源,张金川,李晓光,等.辽河东部凹陷古近系页岩气聚集条件分析[J].西安石油大学学报(自然科学版),2010,25(2):1-5. Wang Guangyuan,Zhang Jinchuan,Li Xiaoguang,et al.Accumulation conditions of the Paleogene shale gas in the eastern sag of Liaohe Depression[J].Journal of Xi'an Shiyou University (Natural Science Edition),2010,25(2):1-5. [6] 李宗亮.辽河坳陷东部凹陷南部沙三段页岩气聚集特征分析及资源量计算[J].特种油气藏,2011,18(4):23-25. Li Zongliang.Characteristics and resource extent of shale gas accumulation in the Es3 of south Eastern Depression of Liaohe oilfield[J].Special Oil and Gas Reservoirs,2011,18(4):23-25. [7] 李婉君,张金川,荆铁亚,等.辽河西部凹陷页岩油聚集条件及有利区优选[J].特种油气藏,2014,21(1):59-63. Li Wangjun,Zhang Jinchuan,Jing Tieya,et al.Shale oil accumulation conditions and optimization of favorable areas in the West Liaohe Sag[J].Special Oil and Gas Reservoirs,2014,21(1):59-63. [8] 李明刚,漆家福,童亨茂,等.辽河西部凹陷新生代断裂构造特征与油气成藏[J].石油勘探与开发,2010,37(3):281-288. Li Minggang,Qi Jiafu,Tong Hengmao,et al.Cenozoic fault structure and hydrocarbon accumulation in Western Sag,Liaohe Depression[J].Petroleum Exploration and Development,2010,37(3):281-288. [9] 廖兴明,姚继峰,于天欣,等.辽河盆地构造演化与油气[M].北京:石油工业出版社,1996:116-12. Liao Xingming,Yao Jifeng,Yu Tianxin,et al.Tectonic evolution and petroleum in Liaohe Depression[M].Beijing:Petroleum Industry Press,1996:116-12. [10] 薛叔浩,罗平,杨永泰,等.辽河坳陷沉积体系与油气分布[J].石油勘探与开发,1997,24(4):19-22. Xue Shuhao,Luo Ping,Yang Yongtai,et al.Depositional systems and oil/gas distribution in the Liaohe Depression[J].Petroleum Exploration and Development,1997,24(4):19-22. [11] 聂海宽,张金川,张培先,等.福特沃斯盆地Barnett页岩气藏特征及启示[J].地质科技情报,2009,28(2):87-93. Nie Haikuan,Zhang Jinchuan,Zhang Peixian,et al.Shale gas reservoir characteristics of Barnett shale gas reservoir in Fort Worth Basin[J].Geological Science and Technology Information,2009,28(2):87-93. [12] Bustin R M.Gas shale tapped for big pay[J].AAPG Explorer,2005,26(2):5-7. [13] Bowker K A.Barnett shale gas production,Fort Worth Basin:Issues and discussion[J].AAPG Bulletin,2007,91(4):523-533. [14] 邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653. Zou Caineng,Dong Dazhong,Wang Shejiao,et al.Geological characteristics,formation mechanism and resource potential of shale gas in China[J].Petroleum Exploration and Development,2010,37(6):641-653. [15] Jarvie D M,Hill R J,Ruble T E,et al.Unconventional shale-gas systems:The Mississippian Barnett shale of north-central Texas as one model for thermogenic shale-gas assessment[J].AAPG Bulletin,2007,91(4):475-499. [16] Gale J F W, Reed R M, Holder J.Natural fractures in the Barnett shale and their importance for hydraulic fracture treatments[J].AAPG Bulletin,2007,91(4):603-622. [17] 秦承志,王先彬,林锡祥,等.辽河盆地埋藏史及烃源岩成熟度演化史的数值模拟[J].沉积学报,2002,20(3):493-498. Qin Chengzhi,Wang Xianbin,Lin Xixiang,et al.Basin modeling of buried history and maturity history of source rock in Liaohe Basin[J].Acta Sedimentologica Sinica,2002,20(3):493-498.
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