礁滩型气藏与燕山、喜山期构造体系的关系
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摘要
四川盆地川东北地区上二叠统长兴组生物礁、滩型气藏和下三叠统飞仙关组鲕粒生物滩型气藏勘探在普光、毛坝取得重大突破之后,很多研究者从沉积相研究出发,都认为这些礁滩是沿广旺海槽、城口—鄂西海槽以及梁平—开江海槽坡折带分布的丘形体,油气富集与海槽相关。然而,叠加上覆燕山、喜山期的构造形迹分析则发现,这些礁滩型气藏在油气成藏运移过程中还与扭动构造体系相关,特别是与各类扭动构造体系的砥柱密切相关。据此观点进行研究进而预测:巴中、仪陇莲花状构造,中台山、绵阳旋扭构造体系的砥柱与下伏地层地震剖面丘形体叠置处有望获得重大的礁滩型油气藏发现。
After significant breakthroughs were made in exploration of the Upper Permian Changxing Formation organic reef-bank gas reservoirs and the Lower Triassic Feixianguan Formation oolitic organic bank gas reservoirs in Puguang and Maoba areas in the northeastern Sichuan Basin,many researchers believed based on study of sedimentary facies that these reef-banks are mounded deposits distributed along Guangwang ocean trough,Chengkou-Exi ocean trough and Liangping-Kaijiang ocean trough slope break zone,where the enrichment of hydrocarbons are related with the ocean troughs.However,analysis of the superimposed structures overlying the Yanshan and Himalayan structures shows that various shear structural systems especially their relatively stable parts have influenced these reef-bank gas reservoirs in the process of hydrocarbon migrations.Based on this concept,it is predicted that large discoveries of reef-bank oil and gas reservoirs are expected in the superimposition area between relatively stable parts of Zhongtaishan and Mianyang shear structural systems and the mounded deposits on the seismic section of the underlying strata in Bazhong and Yilong lotus-form structures.
After significant breakthroughs were made in exploration of the Upper Permian Changxing Formation organic reef-bank gas reservoirs and the Lower Triassic Feixianguan Formation oolitic organic bank gas reservoirs in Puguang and Maoba areas in the northeastern Sichuan Basin,many researchers believed based on study of sedimentary facies that these reef-banks are mounded deposits distributed along Guangwang ocean trough,Chengkou-Exi ocean trough and Liangping-Kaijiang ocean trough slope break zone,where the enrichment of hydrocarbons are related with the ocean troughs.However,analysis of the superimposed structures overlying the Yanshan and Himalayan structures shows that various shear structural systems especially their relatively stable parts have influenced these reef-bank gas reservoirs in the process of hydrocarbon migrations.Based on this concept,it is predicted that large discoveries of reef-bank oil and gas reservoirs are expected in the superimposition area between relatively stable parts of Zhongtaishan and Mianyang shear structural systems and the mounded deposits on the seismic section of the underlying strata in Bazhong and Yilong lotus-form structures.
引文
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[2]马永生,牟传龙,潭钦银,等.关于开江—梁平海槽的认识[J].石油与天然气地质,2006,27(3):326-331.
[3]马永生,郭旭升,郭彤楼,等.四川盆地普光大型气田的发现与勘探启示[J].地质论评,2005,51(5):477-480.
[4]裴振洪.南大巴山构造带中新代构造变形特征研究[J].石油实验地质,2007,29(3):269-274.
[5]蔡立国,饶丹,潘文蕾.川东北地区普光气田成藏模式研究[J].石油实验地质,2005,27(5):462-467.
[6]马永生,蔡勋育,李国雄.四川盆地普光大型气藏基本特征及成藏富集规律[J].地质学报,2005,79(6):858-865.
[7]牟传龙,谭钦银,余谦,等.川东北地区上二叠统长兴组生物礁组成及成礁模式[J].沉积与特提斯地质,2004,24(3):65-71.
[8]马永生,蔡勋育.四川盆地川东北区二叠系天然气勘探成果与前景展望[J].石油与天然气地质,2006,27(6):741-75.
[9]马永生,付强,郭彤楼.川东北地区普光气田长兴组—飞仙关组气藏成藏模式与成藏过程[J].石油实验地质,2005,27(5):455-460.
[10]蔡勋育,朱扬明,黃仁春,等.普光气田沥青地球化学特征及成因[J].石油与天然气地质,2006,27(3):340-347.
[11]王庭斌.中国气蒇主要形成定型于新近纪以来的构造运动[J].石油与天然气地质,2004,25(2):126-132.
[12]王一刚.四川盆地东北部长兴组—飞仙关组气藏成藏条件研究及勘探目标评价[M].北京:石油工业出版社,2001.
[13]肖开华,沃玉进,周雁,等.中国南方海相层系油气成藏特点与勘探方向[J].石油与天然气地质,2006,27(3):316-324.
[14]沃玉进,肖开华,周雁,等.中国南方海相层系油气成藏类型与勘探前景[J].石油与天然气地质,2006,27(1):12-16.
[15]刘殊,唐建民,马永生,等.川东北地区长兴组—飞仙关组礁滩型储层预测[J].石油与天然气地质,2006,27(3):332-339.
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