川北阆中—南部地区茅口组礁滩相储层预测
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摘要
四川盆地北部阆中—南部(地名)地区处于川北坳陷与川中隆起的斜坡部位,具有优越的油气成藏条件。下二叠统茅口组沉积时处于台地边缘相带,东吴运动使其顶部长时间暴露地表。这种沉积环境不仅在沉积期有利于礁滩相岩溶改造型储层的发育,而且在成岩期也有利于建设性成岩作用的发生,同时还有利于裂缝的发育,因而对茅口组礁滩相储层进行预测对本区油气勘探具有重要的意义。参考川东北普光地区上二叠统长兴组储层的地震响应特征,结合本区茅口组储层特征,对研究区储层地震响应的特征进行了分析,并指出了茅口组有利的储层发育带:位于工区西南部呈NW-SE条带状展布的礁滩相储层。
The sedimentary reservoirs in the Lower Permian Maokou formation,Nanbu area of Langzhong in North Sichuan basin,are situated in the platform edge marginal area,with its top surface exposed for a long time due to the Dongwu Movement.The environment here is advantageous not only for the development of converted karst(reef flat facies) reservoirs in the sedimentary period but for the diagenesis in this crucial period and for the formation of faults.Referring to seismic response performance in the Upper Permian Changxing formation,the Puguang area of East Sichuan basin,this paper analyzed that in the study area of the Makou formation and pointed out that the favorable reef flat facies reservoirs are distributed in the NW-SE belt of the southwestern exploration zone.
The sedimentary reservoirs in the Lower Permian Maokou formation,Nanbu area of Langzhong in North Sichuan basin,are situated in the platform edge marginal area,with its top surface exposed for a long time due to the Dongwu Movement.The environment here is advantageous not only for the development of converted karst(reef flat facies) reservoirs in the sedimentary period but for the diagenesis in this crucial period and for the formation of faults.Referring to seismic response performance in the Upper Permian Changxing formation,the Puguang area of East Sichuan basin,this paper analyzed that in the study area of the Makou formation and pointed out that the favorable reef flat facies reservoirs are distributed in the NW-SE belt of the southwestern exploration zone.
引文
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[2]吴亚军.川北阆中—南部地区海相预探井地质论证报告[R].成都:中国石化西南油气分公司,2008.
[3]HAO FANG.Overpressure retardation of organic-matter maturation and petroleum generation:a case study from the yinggehai and Qiongdongnan basins,South China Sea[J].AAPG Bulletin,1995,79.
[4]童崇光.四川盆地构造演化与油气聚集[M].北京:地质出版社,1992.
[5]包茨.天然气地质学[M].北京:科学出版社,1988.
[6]马永生,梅冥相,陈小兵.碳酸盐岩储层沉积学[M].北京:地质出版社,1999.
[7]马永生,傅强,郭彤楼,等.川东北地区普光气田长兴—飞仙关气藏成藏模式与成藏过程[J].石油实验地质,2005,27(5).
[8]戴金星,夏新宇,卫延召,等.四川盆地天然气的碳同位素特征[J].石油实验地质,2001,23(2):115-121.
[9]刘殊,唐建明,马永生,等.川东北地区长兴组—飞仙关组礁滩相储层预测[J].石油与天然气地质,2006,27(3).
[10]吴亚军,黎平.川东北地区通南巴构造带气藏描述[R].成都:中国石化西南油气分公司,2007.
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