四川盆地震旦系灯影组天然气勘探
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摘要
四川盆地自1964年在威远构造威基井于上震旦统灯影组储层钻获世界上最古老气田之一的威远气田以来,经历了近半个世纪的勘探,到目前尚无明显突破。通过对现有资料进行全面研究后,认为四川盆地晚震旦世灯影期早期发育台地碳酸盐潮坪相、台地湖向上变为碳酸盐潮坪相、台地碳酸盐浅缓坡相、台地碳酸盐浅缓坡夹湖相和台地碳酸盐深缓坡相等5种沉积相;该盆地于加里东期末,便形成了雅安—龙女寺、泸州、天井山和开江等4个继承性古隆起,是油气聚集的良好场所,而且钻探深度也为当今钻井技术所能钻及,为进一步勘探的有利地区。而开江古隆起,由于已钻深井少,灯影组储层是否有隆起,尚有待于地震工作证实。
Since Zhenyuan gas field,one of the first gas fields in the world,was drilled successfully in Sinian Dengying Formation of Weiji well in Weiyuan structure in 1964,no significant breakthrough has been made in Sichuan Basin after nearly 50 years? exploration.Five types of sedimentary facies developed in early Dengying Formation of Late Sinian of the basin,i.e.the carbonate tidal flat facies of platform,the carbonate tidal-flat facies on top of the platform lagoon,the carbonate shallow ramp facies of platform,the carbonate shallow ramp facies held by lagoon facies of platform,and the carbonate deep-shallow ramp facies of platform.Through comprehensive study on available data,four successive paleohighs including Yaan-Longnvsi paleohigh,Luzhou paleohigh,Tianjingshan paleohigh,and Kaijiang paleohigh had been formed as early as the Caledonian end of the basin,and they are favorable for oil and gas accumulation.Also the drill depth could be fulfilled by use of current drilling technologies.But in Kaijiang paleohigh,with less drilled wells,whether there are uplifts in Dengying Formation needs to be proved through seismic work.
Since Zhenyuan gas field,one of the first gas fields in the world,was drilled successfully in Sinian Dengying Formation of Weiji well in Weiyuan structure in 1964,no significant breakthrough has been made in Sichuan Basin after nearly 50 years? exploration.Five types of sedimentary facies developed in early Dengying Formation of Late Sinian of the basin,i.e.the carbonate tidal flat facies of platform,the carbonate tidal-flat facies on top of the platform lagoon,the carbonate shallow ramp facies of platform,the carbonate shallow ramp facies held by lagoon facies of platform,and the carbonate deep-shallow ramp facies of platform.Through comprehensive study on available data,four successive paleohighs including Yaan-Longnvsi paleohigh,Luzhou paleohigh,Tianjingshan paleohigh,and Kaijiang paleohigh had been formed as early as the Caledonian end of the basin,and they are favorable for oil and gas accumulation.Also the drill depth could be fulfilled by use of current drilling technologies.But in Kaijiang paleohigh,with less drilled wells,whether there are uplifts in Dengying Formation needs to be proved through seismic work.
引文
廖士范,贵州的震旦系,1974。
王世谦、陈盛吉等,四川盆地油气资源评价,2002。
王乃举,中国天然气开发图集(第四分册),1992。
陈宗清,论四川盆地下三叠统嘉陵江组一—二段天然气勘探,2007。
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[11]宋文海.对四川盆地加里东期古隆起的新认识[J].天然气工业,1987,27(3):6～11.
王世谦、陈盛吉等,四川盆地油气资源评价,2002。
王乃举,中国天然气开发图集(第四分册),1992。
陈宗清,论四川盆地下三叠统嘉陵江组一—二段天然气勘探,2007。
[1]中国科学院南京地质古生物研究所.西南地区地层古生物手册[M].北京:科学出版社,1974:3～10.
[2]中南地区区域地层表编写组.中南地区区域地层表[M].北京:地质出版社,1974:23～132.
[3]刘宝.沉积岩石学[M].北京:地质出版社,1980:221.
[4]张声瑜,唐创基.四川盆地灯影组区域地质条件及含气远影[J].天然气工业,1986,21(1):3～9.
[5]西北大学地质系石油地质教研室.石油地质学[M].北京:地质出版社,1979.
[6]陈作全.石油地质学简明教程[M].北京:地质出版社,1987:36.
[7]计德华,岳宏.川西南震旦系油气勘探前景的探讨[J].天然气工业,1986,21(1):10～14.
[8]赵文智,邹才能,冯志强,等.松辽盆地深层火山岩气藏地质特征及评价技术[J].石油勘探与开发,2008,35(2):129～142.
[9]陈宗清.四川盆地中二叠统茅口组天然气勘探[J].中国石油勘探,2007,12(5):1～11.
[10]陈宗清.论四川盆地下三叠统嘉陵江组三—四段天然气勘探[J].中国石油勘探,2008,13(6):1～11.
[11]宋文海.对四川盆地加里东期古隆起的新认识[J].天然气工业,1987,27(3):6～11.
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