鄂尔多斯盆地富县地区长7页岩气勘探潜力分析
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摘要
鄂尔多斯盆地是大型富含油气盆地,发育多套页岩层系,具备页岩气成藏的物质基础。为查明鄂尔多斯盆地富县地区长7页岩气的勘探潜力,本文在区内及邻区老井复查、岩心观察的基础上,利用有机地球化学和岩石学分析、含气量测试等多种手段,分析了长7页岩的基本特征、地化及含气性特征。在此基础上,对长7页岩气勘探潜力作了初步评价。结果表明,长7页岩埋深和厚度适中,有机质具有混合型的特点,且以Ⅱ1型为主,有机质含量高;岩石中脆性矿物石英含量不低,裂缝发育;长7全段含气量较高,其中以长73最优,可达6. 63 m3/t,是长7页岩气勘探的有利层位;研究区内泥页岩厚度大、含气量高的张家湾和直罗地区为页岩气勘探的有利区。
As a large-sized petroliferous basin with many shale formations,the Ordos basin has the material basis for shale gas development. In order to evaluate the shale gas exploration potential of Chang 7 formation,the authors investigated the geological and geochemical characteristics of Chang 7 formation with the aid of organic geochemical and petrologic analysis,gas quanitity test. On such a basis,the preliminary evaluation of Chang 7 formation shale gas exploration potential was carried out. The result showed that the Chang 7 formation shale has moderate burial depth and thickness,with high abundance of organic matters and mixed character which is mainly of Ⅱ1 type,with low content of brittle mineral quartz and much fracture. The Chang 7 formation intact gas content is high,which is the Chang 73 optimal,the maximum gas quantity could be up to 6. 63 m3/t,that is favourable for the formation of Chang 7 shale gas exploration. The favorable targets lie in the Zhangjiawan and Zhiluo area which has thicknese shale,high gas content.
As a large-sized petroliferous basin with many shale formations,the Ordos basin has the material basis for shale gas development. In order to evaluate the shale gas exploration potential of Chang 7 formation,the authors investigated the geological and geochemical characteristics of Chang 7 formation with the aid of organic geochemical and petrologic analysis,gas quanitity test. On such a basis,the preliminary evaluation of Chang 7 formation shale gas exploration potential was carried out. The result showed that the Chang 7 formation shale has moderate burial depth and thickness,with high abundance of organic matters and mixed character which is mainly of Ⅱ1 type,with low content of brittle mineral quartz and much fracture. The Chang 7 formation intact gas content is high,which is the Chang 73 optimal,the maximum gas quantity could be up to 6. 63 m3/t,that is favourable for the formation of Chang 7 shale gas exploration. The favorable targets lie in the Zhangjiawan and Zhiluo area which has thicknese shale,high gas content.
引文
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[17]邱欣卫,刘池洋,李元昊.鄂尔多斯盆地延长组凝灰岩夹层展布特征及其地质意义[J].沉积学报,2009,27(6):1138-1146.
[18]杜芳鹏,刘池洋,王建强,等.鄂尔多斯盆地南部上三叠统延长组软沉积变形特征及构造意义[J].现代地质,2014,28(2):314-320.
[19]师学耀.鄂尔多斯盆地富县探区黄家岭—水磨沟延长组长8油层组储层特征研究[D].西安:西北大学,2015.
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[21]许小强,姜呈馥,高栋臣,等.鄂尔多斯盆地东南部延长组长7页岩气储层列分特征及其控制因素[J].延安大学学报(自然科学版),2013,32(4):82-89.
[22]耳闯,赵靖舟,白玉彬,等.鄂尔多斯盆地三叠系延长组富有机质泥岩储层特征[J].石油与天然气地质,2013,34(5):708-716.
[23]任战利,李文厚,梁宇,等,鄂尔多斯盆地东南部延长组致密油成藏条件及主控因素[J].石油与天然气地质,2014,35(2):190-198.
[24]任战利,张盛,高胜利,等.鄂尔多斯盆地热演化程度异常分布区及其形成时期探讨[J].地质学报,2005,80(5):674-684.
[25]王香增,高胜利,高潮.鄂尔多斯盆地南部中生界陆相页岩气地质特征[J].石油勘探与开发,2014,41(3):294-304.
[26]王社教,王登华,李建忠,等.鄂尔多斯盆地页岩气勘探潜力分析[J].天然气工业,2011,31(12):40-46.
[27]宫美林,丁文龙,皮冬冬,等.鄂尔多斯盆地东南部下寺湾-云岩区二叠系山西组页岩气形成条件[J].东北石油大学学报,2013,37(3):1-10.
[28]Daniel J K,Ross R. Marc Bustin impact of mass balance calculations on adsorption capacities in microporous shale gas reservoirs[J]. Fuel,2007,86(17/18):2696-2706.
[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):14-20.
[3]Shirley K. Tax break rekindled interest:shale gas exciting again[J]. AAPG Explorer,2001,22(3):24-25.
[4]赵靖舟,方朝强,张洁,等.由北美页岩气勘探开发看我国页岩气选区评价[J].西安石油大学学报(自然科学版),2011,26(2):1-7.
[5]李新景,吕宗刚,董大忠,等.北美页岩气资源形成的地质条件[J].天然气工业,2009,29(5):27-32.
[6]李天星.页岩气引发能源革命[J].中国石油企业,2011,6:50-51.
[7]张金川,薛会,昌荣,等.中国非常规天然气勘探雏议[J].天然气工业,2006,26(12):53-56.
[8]李建忠,董大忠,陈更生,等.中国页岩气前景与战略地位[J].天然气工业,2009,29(5):11-16.
[9]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.
[10]Chen S B,Zhu Y M,Wang M,et al. Prospect conceiving of joint research and development of shale Gas and coalbed methane in China[J]. Energy and Power Engineering,2011(3):348-354.
[11]董大忠,邹才能,李建忠,等.页岩气资源潜力与勘探开发前景[J].地质通报,2011,30(2-3):324-336.
[12]王香增,贺永红,张立宽,等.鄂尔多斯盆地吴起—志丹地区长10烃源岩特征与生烃潜力[J].天然气地球科学,2013,24(3):461-469.
[13]姜呈馥,王香增,张丽霞,等.鄂尔多斯盆地东南部延长组长7段陆相页岩气地质特征及勘探潜力评价[M].中国地质,2013,40(6):1880-1888.
[14]周文,苏瑗,王付斌,等.鄂尔多斯盆地富县区块中生界页岩气成藏条件与勘探方向[J].地质勘探,2011,31(2):29-33.
[15]王香增.陕西延长石油(集团)有限责任公司油气勘探开发进展与展望[J].中国石油勘探,2018,23(1):36-43.
[16]刘池洋,赵红格,桂小军,等.鄂尔多斯盆地演化-改造的时空坐标及其成藏(矿)响应[J].地质学报,2006,80(5):618-637.
[17]邱欣卫,刘池洋,李元昊.鄂尔多斯盆地延长组凝灰岩夹层展布特征及其地质意义[J].沉积学报,2009,27(6):1138-1146.
[18]杜芳鹏,刘池洋,王建强,等.鄂尔多斯盆地南部上三叠统延长组软沉积变形特征及构造意义[J].现代地质,2014,28(2):314-320.
[19]师学耀.鄂尔多斯盆地富县探区黄家岭—水磨沟延长组长8油层组储层特征研究[D].西安:西北大学,2015.
[20]Gale,J Fw Reed RM,Holder M. Natural fractures in the Barnett Shale and their important for hydraulic fracture treatment[J]. American Association of Petroleum Geologists Bulletin,2007,91(4):603—622.
[21]许小强,姜呈馥,高栋臣,等.鄂尔多斯盆地东南部延长组长7页岩气储层列分特征及其控制因素[J].延安大学学报(自然科学版),2013,32(4):82-89.
[22]耳闯,赵靖舟,白玉彬,等.鄂尔多斯盆地三叠系延长组富有机质泥岩储层特征[J].石油与天然气地质,2013,34(5):708-716.
[23]任战利,李文厚,梁宇,等,鄂尔多斯盆地东南部延长组致密油成藏条件及主控因素[J].石油与天然气地质,2014,35(2):190-198.
[24]任战利,张盛,高胜利,等.鄂尔多斯盆地热演化程度异常分布区及其形成时期探讨[J].地质学报,2005,80(5):674-684.
[25]王香增,高胜利,高潮.鄂尔多斯盆地南部中生界陆相页岩气地质特征[J].石油勘探与开发,2014,41(3):294-304.
[26]王社教,王登华,李建忠,等.鄂尔多斯盆地页岩气勘探潜力分析[J].天然气工业,2011,31(12):40-46.
[27]宫美林,丁文龙,皮冬冬,等.鄂尔多斯盆地东南部下寺湾-云岩区二叠系山西组页岩气形成条件[J].东北石油大学学报,2013,37(3):1-10.
[28]Daniel J K,Ross R. Marc Bustin impact of mass balance calculations on adsorption capacities in microporous shale gas reservoirs[J]. Fuel,2007,86(17/18):2696-2706.