渤海海域渤东地区烃源特征及资源潜力
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摘要
为了客观评价渤东地区的油气资源潜力,利用钻井和地震资料,在地层、构造和沉积研究基础上,结合岩样与油样的有机地化分析,对该区烃源岩特征、油气来源、优质烃源岩分布、烃源岩热演化特征进行了系统分析,并在此基础上用盆地模拟法对该区资源潜力进行了预测。研究认为,渤东地区发育4套烃源岩,其中沙三段和沙一段烃源岩达到优质级别,沙四段和东三段烃源岩为中等-好级别;渤东地区已发现原油来源具有多样性,但总体上以沙三段来源原油为主;在渤东地区4套烃源岩中,沙三段优质烃源岩分布广、厚度大、热演化程度高,生烃潜力占总生烃量的74.8%,是该区主力烃源岩;在该区的4个洼陷中,渤东西洼生烃强度最大,庙西北洼其次,这2个洼陷是潜在富烃洼陷。
In order to make an objective evaluation of the hydrocarbon resource potential in the Bodong Sag based on stratigraphy,tectonics and sedimentology,as well as organic geochemitry of rock and oil samples,the authors systematically studied the characteristics of source rocks,oil and gas sources,distribution of high-quality source rocks and thermal evolution of source rocks in the sag.And the resource potential of this sag is assessed using basin simulation technology.The research shows that four sets of source rocks are well developed in the sag,and the source rocks of E2S3 and E2S3are the best and the E2S4 and E3d3fall within the middle-good level.Crude oil found in the sag can be divided into four source types and each type is distributed in definite area.Among the four types,oil from E2S3 dominates.Among the 4sub-sags in the Bodong Sag,west Bodong sub-sag and the north Miaoxi sub-sag are the two top potential hydrocarbon-rich sub-sags,which have more sets of high quality hydrocarbon source rocks and larger hydrocarbon generation potential.
In order to make an objective evaluation of the hydrocarbon resource potential in the Bodong Sag based on stratigraphy,tectonics and sedimentology,as well as organic geochemitry of rock and oil samples,the authors systematically studied the characteristics of source rocks,oil and gas sources,distribution of high-quality source rocks and thermal evolution of source rocks in the sag.And the resource potential of this sag is assessed using basin simulation technology.The research shows that four sets of source rocks are well developed in the sag,and the source rocks of E2S3 and E2S3are the best and the E2S4 and E3d3fall within the middle-good level.Crude oil found in the sag can be divided into four source types and each type is distributed in definite area.Among the four types,oil from E2S3 dominates.Among the 4sub-sags in the Bodong Sag,west Bodong sub-sag and the north Miaoxi sub-sag are the two top potential hydrocarbon-rich sub-sags,which have more sets of high quality hydrocarbon source rocks and larger hydrocarbon generation potential.
引文
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[18]王培荣,张大江,宋孚庆,等.区分渤中坳陷三套烃源岩的地球化学参数组合[J].中国海上油气,2004,16(3):157-160.
[2]朱伟林,王国纯,周毅.渤海油气资源浅析[J].石油学报,2000,21(3):1-7.
[3]张功成.渤海海域构造格局与富生烃凹陷分布[J].中国海上油气,2000,14(2)93-99.
[4]翟光明.中国石油地质志卷十六:沿海大陆架及毗邻海域油气区)上册[M].北京:石油工业出版社,1987:64-69.
[5]邓运华,李秀芬.蓬莱19-3油田的地质特征及启示[J].中国石油勘探,2001,6(1):68-71.
[6]朱伟林,米立军,龚再生,等.渤海海域油气成藏与勘探[M].北京:科学出版社,2009:123-146.
[7]夏庆龙,周心怀,薛永安,等.渤海海域油气藏形成分布与资源潜力[M].北京:石油工业出版社,2012:36-254.
[8]文志刚,何文祥,米立军,等.渤东凹陷东营组烃源岩评价[J].矿物岩石地球化学通报,2005,24(3):204-206.
[9]何文祥,米立军,文志刚,等.渤东凹陷烃源岩生烃潜力研究[J].天然气工业,2005,25(5):14-17.
[10]胡建武,郝芳,邹华耀,等.渤中坳陷活跃烃源岩分布特征及其对PL19-3油气成藏的控制作用[J].石油天然气学报,2006,28(1):13-15.
[11]郭永华,周心怀,凌艳玺,等.渤海海域蓬莱19-3油田油气成藏特征新认识[J].石油与天然地质,2011,32(3):327-332.
[12]吴克强,吴景富,刘丽芳,等.构造迁移及其对油气成藏的影响——以渤海渤东—庙西凹陷为例[J].中国海上油气,2014,26(2):5-1.
[13]吴智平,薛雁,颜世永,等.渤海海域渤东地区断裂体系与盆地结构[J].高校地质学报,2013,19(3):463-474.
[14]田立新,吴国强,张金辉.渤海东部庙西地区隆凹结构的形成及与油气聚集的关系[J].石油实验地质,2014,36(1):56-62.
[15]刘长海,魏文艳,任志勇,等.渤海海域渤东凹陷沙河街组四段古生物组合的发现及其意义[J].微体古生物学报,2011,28(3):316-323.
[16]庞雄奇,郭永华,姜福杰,等.渤海海域优质烃源岩及其分布预测[J].石油与天然气地质[J],2009,30(4):393-397.
[17]姜福杰,庞雄奇,姜振学,等.渤海海域沙三段烃源岩评价及排烃特征[J].石油学报,2010,31(6):906-911.
[18]王培荣,张大江,宋孚庆,等.区分渤中坳陷三套烃源岩的地球化学参数组合[J].中国海上油气,2004,16(3):157-160.