川东南地区茅口组古岩溶发育特征及勘探领域  

Palaeokarst Reservoirs and Exploration Areas of Maokou Formation in the Southeast of Sichuan Basin

作　　者：郭旭升[1] 李宇平[1] 魏全超[1] 

机构地区：[1]中国石化勘探南方分公司,四川成都610041

出　　处：《西南石油大学学报（自然科学版）》2012年第6期1-8,共8页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重大科技专项"南方海相碳酸盐岩层系大中型油气田形成规律与勘探评价"(2011ZX05005–003)

摘　　要：近期勘探突破表明茅口组储层在川东南地区具有较大的勘探潜力。通过古岩溶纵向划分、地震反射特征分类展布研究及恢复古地貌等方法对茅口组古岩溶发育特征进行了深入研究。茅口组灰岩古岩溶纵向上可划分为垂直渗流带、水平潜流带、深部缓流带,其中垂直渗流带和水平潜流带是储层发育的有利岩溶相带。地震上发育"斜亮点"和"变振幅"两种古岩溶储层类型,集中分布在岩溶斜坡的隆盛及天堂坝—四面山地区。綦江—涪陵处于官渡岩溶高地的东斜坡,勘探领域广阔。The recent exploration breakthrough in the southeast of Sichuan shows that Maokou formation reservoir in Southeast Sichuan has great exploration potential.The main technical methods are the vertical division,the seismic reflection characteristics and the recovery palaeogeomorphology.Maokou formation palaeokarst can be divided into vertical vadose zone,horizontal phreatic zones and deep slow flow zones in the vertical direction.Karst-type reservoirs are largely distributed in vertical vadose and horizontal phreatic zones.There are featured by＂Oblique bright spot＂and＂catastrophic amplitude＂in the seismic reflection characteristics,which are distributed within Longsheng,Tiantangba and Simianshan areas.Qijiang-Fuling area have a nice exploration prospect,beacause it is located in east slope of Guandu karst slope.

关 键 词：茅口组 古岩溶 古地貌 勘探领域 四川盆地 

分 类 号：TE132[石油与天然气工程—油气勘探]