Accumulation conditions of shale gas in Sujiatun Sub-depression, Lishu Fault Depression, Songliao Basin
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摘要: 通过对松辽盆地梨树断陷苏家屯次洼基本油气地质特征分析,认为营城组一段形成于断陷发育的鼎盛时期,发育稳定的大套泥岩夹薄砂岩地层.地化特征表明该段泥页岩具有有机质丰度较好、有机质类型丰富、热演化处于生气的成熟—高成熟阶段等特点.泥页岩中平均孔隙度达到3.52%,裂缝和微裂缝相对较发育,不仅可以为游离态气提供有利的储集空间,且脆性矿物含量相对较高,平均为41.1%,石英含量在15.1%~23.4%之间,岩石具有较好的可压性.钻井现场解析结果表明该段泥页岩中含气最高可达3.09 m3/t,且钻井气测全烃异常以及测试资料也表明该区页岩气的存在,说明该泥页岩中蕴藏着一定规模的页岩气资源,具有良好的资源前景和勘探潜力.Abstract: The geologic features of the Sujiatun Sub-depression in the Lishu Fault Depression indicated that during the heyday of fault depression development,a large set of mudstone interbedded with sandstone generated stably in the first member of the Yingcheng Formation.This set of shale is characterized by rich organic content,various organic types and is mature and high-mature for gas generation.The average porosity is 3.52% and a mass of fractures can be observed,providing room for free gas accumulation.In addition,the content of brittle minerals is relatively higher,with an average value of 41.1%.The content of quartz ranges from 15.1% to 23.4%.The shale is easy to crack.Field works have shown that the highest gas content in the shale may amount to 3.09 m3/t.The abnormity in total hydrocarbon measuring also predicts the existence of shale gas,indicating for good potential.
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Key words:
- shale gas /
- accumulation condition /
- Sujiatun Sub-depression /
- Lishu Fault Depression /
- Songliao Basin
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[1] Curtis J B.Fractured shale-gas systems[J].AAPG Bulletin,2002,86(11):1921-1938. [2] 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):14-18. [3] 张金川,薛会,张德明,等.页岩气及其成藏机理[J].现代地质,2003,17(4):466. [4] 陈新军,包书景,侯读杰,等.页岩气资源评价方法与关键参数探讨[J].石油勘探与开发,2012,29(5):566-571. [5] 李新景,胡素云,程克明.北美裂缝性页岩气勘探开发的启示[J].石油勘探与开发,2007,34(4):392-400. [6] 聂海宽,张金川.页岩气储层类型和特征研究:以四川盆地及其周缘下古生界为例[J].石油实验地质,2011,33(3):219-225. [7] 聂海宽,唐玄,边瑞康.页岩气成藏控制因素及中国南方页岩气发育有利区预测[J].石油学报,2009,30(4):484-491. [8] Nelson R A.Geologic analysis of naturally fractured reservoirs: Contributions in petroleum geology and engineering[M].Houston:Gulf Publishing Company,1985:320. [9] 陈祥,严永新,章新文,等.南襄盆地泌阳凹陷陆相页岩气形成条件研究[J].石油实验地质,2011,33(2):137-141. [10] 康玉柱.中国非常规泥页岩油气藏特征及勘探前景展望[J].天然气工业,2012,32(4):1-5. [11] 陈更生,董大忠,王世谦,等.页岩气藏形成机理与富集规律初探[J].天然气工业,2009,29(5):17-21. [12] 侯读杰,包书景,毛小平,等.页岩气资源潜力评价的几个关键问题讨论[J].地球科学与环境学报,2012,34(3):7-16. [13] 徐国盛,徐志星,段亮,等.页岩气研究现状及发展趋势[J].成都理工大学学报:自然科学版,2011,38(6):603-610. [14] 罗小平,刘军,徐国盛,等.湘中拗陷泥盆—石炭系海相泥页岩地球化学特征及等温吸附性能[J].成都理工大学学报:自然科学版,2012,39(2):206-214. -
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