通南巴地区上二叠统—下三叠统层序地层划分
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摘要
运用海相碳酸盐岩层序地层学及沉积学原理,结合野外露头层序调查和覆盖区钻井、测井及地震等资料的分析,根据层序界面组成、特征、识别标志及形成机理等因素,将四川盆地通南巴地区的上二叠统—下三叠统地层划分为8个Ⅲ级层序、2个Ⅱ级层序。在建立等时地层格架的基础上,对该区上二叠统—下三叠统台盆的沉积充填结构和有利储层发育层位进行了刻划,还指出了本区下一步天然气勘探部署的有利方向为马路背—黑池梁地区的T1f1—P2ch、T1f3、T1j2储层及元坝地区的T1f1—P2ch、T1f3、T1j2储层。
By use of sedimentology and sequence stratigraphy on marine carbonatite, combined with strata sequence study on the field outcrops and analysis on data from drilling, seismic logging and testing within an area of coverage, the Upper Permian-Lower Triassic formations in Tongnanba area of the Sichuan Basin could be classified by 8 third-order and 2 second-order strata sequences, in light of many factors of sequence contact bed like the formation, features, identification marks and confirmation mechanism. Based on building up isochronal strata framework, this paper describes deposition fill configuration and strata sequence of well-developed reservoirs in the Upper Permian-Lower Triassic platform of this area. Furthermore, it also points out those advantageous exploration areas for the next step should be T1f1-P2ch, T1f3, and T1j2 in Malubei-Heichiliang zone, and T1f1-P2ch, T1f3, and T1f2 in Yuanba zone.
By use of sedimentology and sequence stratigraphy on marine carbonatite, combined with strata sequence study on the field outcrops and analysis on data from drilling, seismic logging and testing within an area of coverage, the Upper Permian-Lower Triassic formations in Tongnanba area of the Sichuan Basin could be classified by 8 third-order and 2 second-order strata sequences, in light of many factors of sequence contact bed like the formation, features, identification marks and confirmation mechanism. Based on building up isochronal strata framework, this paper describes deposition fill configuration and strata sequence of well-developed reservoirs in the Upper Permian-Lower Triassic platform of this area. Furthermore, it also points out those advantageous exploration areas for the next step should be T1f1-P2ch, T1f3, and T1j2 in Malubei-Heichiliang zone, and T1f1-P2ch, T1f3, and T1f2 in Yuanba zone.
引文
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[2]翟光明.中国石油地质志(卷十二)[M].北京:石油工业出版社,1992.
[3]郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社,1996.
[4]何莹,鲍志东,沈安江,等.塔里木盆地牙哈—英买力地区寒武系—下奥陶统白云岩形成机理[J].沉积学报,2006,24(6):806-818.
[5]王庭斌.中国大中型气田成藏的主控因素及勘探领域[J].石油与天然气地质,2005,26(5):572-583.
[6]马永生,梅冥相,陈小兵,等.碳酸盐岩储层沉积学[M].北京:地质出版社,1999.
[7]马永生,牟传龙.川东北地区二叠—三叠系间白云岩时代归属讨论[J].南方油气,2004,1(4):1-6.
[8]何莹,郭旭升,张克银,等.川东北飞仙关组优质储层形成研究[J].天然气工业,2007,27(1):12-16.
[9]王一刚,张静,刘兴刚,等.四川盆地东北部下三叠统飞仙关组碳酸盐蒸发台地沉积相[J].古地理学报,2005,7(3):357-371.
[10]魏国齐,陈更生,杨威,等.四川盆地北部开江—梁平海槽边界及特征初探[J].石油与天然气地质,2006,27(1):99-104.
[11]马永生,牟传龙,谭钦银,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.
[12]王一刚,文应初,洪海涛,等.四川盆地及邻区上二叠统—下三叠统海槽的深水沉积特征[J].石油与天然气地质,2006,27(5):702-714.
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