鄂尔多斯盆地南部延长组长7段致密油成藏条件与富集主控因素
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摘要
为评价鄂尔多斯盆地南部延长组长7段致密油的勘探前景,以地化分析测试、场发射扫描电镜、平衡深度法等研究手段,通过对烃源岩、储层、油气运移等方面的研究,深入探究该区长7段致密油各项成藏条件并进行潜力评价。结果表明,该区长7段优质烃源岩分布稳定,生油能力强,且上下邻近砂岩发育,具有良好的源储配置条件;该区致密油藏在早白垩世大规模形成,属于晚期成藏;在形成和聚集过程中主要受沉积微相和物性条件控制;根据评价结果可知,长71亚段油层组I类,Ⅱ类有利区发育较多。研究后认为,长7段致密油藏富集的主控因素有:源储配置是致密油形成的关键因素,各类孔隙发育是致密油富集的重要前提,顶部盖层和侧向遮挡是致密油保存的必要条件。
The tight oil of Chang 7 interval was found at the south part of Ordos Basin,but the research of accumulation geological conditions was seldom involved in study. In order to evaluate tight oil exploration prospect of Chang 7 interval,the analysis of geochemical test,field emission scanning electron microscopy( sem)and balance depth research were used to study sedimentary microfacies,reservoir rock and hydrocarbon migration. Finally the control factors of tight oil accumulation conditions in study area were identified. The high quality source rocks of Chang 7 interval are widely developed in the study area,the sandstone near hydrocarbon source rocks. The geological conditions of forming tight oilreservoir is good. The tight oil accumulation period in Yanchang Formation is at early Cretaceous,tight oil accumulation occurred in late stage. Tight oil reservoir formation and enrichment are controlled by sedimentary microfacies and quanlity reservoirs. The Chang71 interval is the main targets for exploration of tight oil in Yanchang Formation in study area. The main controlling factors of Chang 7 tight oil enrichment are as follows: good configuration of source rock and reservoir and constant charging are the key to the formation of the tight oil province,all kinds of pore development are the premise of tight oil enrichment,the top of the cap rocks and lateral block is necessary for dense oil saving.
The tight oil of Chang 7 interval was found at the south part of Ordos Basin,but the research of accumulation geological conditions was seldom involved in study. In order to evaluate tight oil exploration prospect of Chang 7 interval,the analysis of geochemical test,field emission scanning electron microscopy( sem)and balance depth research were used to study sedimentary microfacies,reservoir rock and hydrocarbon migration. Finally the control factors of tight oil accumulation conditions in study area were identified. The high quality source rocks of Chang 7 interval are widely developed in the study area,the sandstone near hydrocarbon source rocks. The geological conditions of forming tight oilreservoir is good. The tight oil accumulation period in Yanchang Formation is at early Cretaceous,tight oil accumulation occurred in late stage. Tight oil reservoir formation and enrichment are controlled by sedimentary microfacies and quanlity reservoirs. The Chang71 interval is the main targets for exploration of tight oil in Yanchang Formation in study area. The main controlling factors of Chang 7 tight oil enrichment are as follows: good configuration of source rock and reservoir and constant charging are the key to the formation of the tight oil province,all kinds of pore development are the premise of tight oil enrichment,the top of the cap rocks and lateral block is necessary for dense oil saving.
引文
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[14]杨华,李士祥,刘显阳.鄂尔多斯盆地致密油页岩油特征及资源潜力[J].石油学报,2013,34(1):1-11.
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[19]吉利明,吴涛,李林涛.鄂尔多斯盆地西峰地区延长组烃源岩干酪根地球化学特征[J].石油勘探与开发,2007,34(4):424-428.
[20]CHEN Z H,OSADETZ K G,JIANG C Q,et al.Spatial variation of Bakken or Lodgepoleoils in the Canadian Williston Basin[J].AAPG Bulletin,2009,93(6):829-85.
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[22]KUHN P P,DI PRIMIO R,HIU R,et al.Three-dimensional modeling study of the low-permeability system of the bakken formation[J].AAPG Bulletin,2012,96(10):1867-1897.
[23]姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158.
[24]郭馨蔚,师永民,杨悦,等.鄂尔多斯盆地长6油层组致密储层影响因素分析[J].大庆石油地质与开发,2013,32(5):165-169.
[25]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.
[26]任战利,刘丽,崔军平,等.盆地构造热演化史在油气成藏期次研究中的应用[J].石油与天然气地质,2008,29(4):502-506.
[27]任战利,张盛,高胜利,等.鄂尔多斯盆地构造热演化史及其成藏成矿意义[J].中国科学(D辑地球科学),2007,29(增刊):23-32.
[2]刘新,张玉纬,张威,等.全球致密油的概念、特征、分布及潜力预测[J].大庆石油地质与开发,2013,32(4):168-174.
[3]王飞宇,孟晓辉,冯伟平,等.湖相致密油资源量和可采性评价技术[J].大庆石油地质与开发,2013,32(3):144-149.
[4]孙赞东,贾承造,李相方,等.非常规油气勘探与开发(上册)[M].北京:石油工业出版社,2011.
[5]邹才能,陶士振,侯连华,等.非常规油气地质[M].北京:地质出版社,2011:127-167.
[6]贾承造,郑民,张永峰.中国非常规油气资源与勘探开发前景[J].石油勘探与开发,2012,39(2):121-136.
[7]邹才能,朱如凯,吴松涛,等.常规与非常规油气聚集类型特征机理及展望---以中国致密油和致密气为例[J].石油学报,2012,33(2):173-186.
[8]赵靖舟.非常规油气有关概念分类及资源潜力[J].天然气地球科学,2012,23(3):393-406.
[9]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):190-197.
[10]贾承造,邹才能,李建忠,等.中国致密油评价标准主要类型基本特征及资源前景[J].石油学报,2012,33(3):343-350.
[11]张凤奇,张凤博,钟红利,等.鄂尔多斯盆地甘泉南部地区延长组长7致密油富集主控因素[J].岩性油气藏,2016,28(3):12-19.
[12]杨华,张文正.论鄂尔多斯盆地长7段优质油源岩在低渗透油气成藏富集中的主导作用:地质地球化学特征[J].地球化学,2005,34(2):147-154.
[13]尤源,刘建平,冯胜斌,等.块状致密砂岩的非均质性及对致密油勘探开发的启示[J].大庆石油地质与开发,2015,34(4):168-174.
[14]杨华,李士祥,刘显阳.鄂尔多斯盆地致密油页岩油特征及资源潜力[J].石油学报,2013,34(1):1-11.
[15]李忠兴,屈雪峰,刘万涛,等.鄂尔多斯盆地长7段致密油合理开发方式探讨[J].石油勘探与开发,2015,42(2):217-221.
[16]李海波,郭和坤,杨正明,等.鄂尔多斯盆地陕北地区三叠系长7致密油赋存空间[J].石油勘探与开发,2015,42(3):396-400.
[17]杨华,窦伟坦,刘显阳,等.鄂尔多斯盆地三叠系延长组长7沉积相分析[J].沉积学报,2010,28(2):254-263.
[18]秦建中.中国烃源岩[M].北京:科学出版社,2005:32-33.
[19]吉利明,吴涛,李林涛.鄂尔多斯盆地西峰地区延长组烃源岩干酪根地球化学特征[J].石油勘探与开发,2007,34(4):424-428.
[20]CHEN Z H,OSADETZ K G,JIANG C Q,et al.Spatial variation of Bakken or Lodgepoleoils in the Canadian Williston Basin[J].AAPG Bulletin,2009,93(6):829-85.
[21]BROWNING J,TINKER S W,KONNOKOVA S,et al.Study develop fayetteville shale resewes,production forecast[J].Oil Gas Joural,2014,112(1):64-73.
[22]KUHN P P,DI PRIMIO R,HIU R,et al.Three-dimensional modeling study of the low-permeability system of the bakken formation[J].AAPG Bulletin,2012,96(10):1867-1897.
[23]姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158.
[24]郭馨蔚,师永民,杨悦,等.鄂尔多斯盆地长6油层组致密储层影响因素分析[J].大庆石油地质与开发,2013,32(5):165-169.
[25]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.
[26]任战利,刘丽,崔军平,等.盆地构造热演化史在油气成藏期次研究中的应用[J].石油与天然气地质,2008,29(4):502-506.
[27]任战利,张盛,高胜利,等.鄂尔多斯盆地构造热演化史及其成藏成矿意义[J].中国科学(D辑地球科学),2007,29(增刊):23-32.