滨里海盆地北部-西北部断阶带盐下油气成藏条件  

Hydrocarbon Accumulation Conditions of the Sub-Salt Strata in North-Northwestern Pre-Caspian Basin

作　　者：周生友[1,2] 马艳[1] 唐永坤 李长征[2] 陈桂菊[2] 

机构地区：[1]中国地质大学地质工程与矿产资源国家重点实验室,北京100083 [2]中国石化勘探开发研究院,北京100083 [3]中国石油长城钻探工程公司测井公司国际项目部,北京100101

出　　处：《新疆石油地质》2010年第2期216-219,共4页Xinjiang Petroleum Geology

基　　金：国家专项(2008ZX05031-01-03)

摘　　要：滨里海盆地北部-西北部断阶带盐下含油层系是一个主要勘探目标区,已发现35个盐下油气田,区内发育中泥盆统艾菲尔阶—吉维特阶、上泥盆统法门阶(D3)—下石炭统杜内阶(C1)、下石炭统维宪阶(C1)—中石炭统巴什基尔阶(C2)、上石炭统莫斯科阶(C2)—上二叠统阿丁斯克阶(P1)等4套高丰度优质烃源岩,泥盆系—下二叠统的碳酸盐岩礁或颗粒滩,为油气的聚集提供了良好的储集条件,区域分布的早二叠世孔谷期盐岩盖层为盐下储集层起到了良好的封盖作用;成藏主要时期为中生代,圈闭类型主要为生物礁建造和背斜构造,勘探潜力区为北东-南西主体方向分布的二叠系串珠状障壁礁及卡拉恰加纳克油气田邻近地区北西-南东向分布的石炭系-泥盆系的堡礁碳酸盐岩。The sub-salt series of strata in north-northwestern step-fauh zone of Pre-Caspian basin is a major target area for petroleum exploration and 35 oil-gas fields have been discovered. In this area, there are 4 sets of premium hydrocarbon source rocks with high abundance of organic matter, which provide premium reservoir conditions for hydrocarbon accumulation. The regional salt rocks of the Early Permian play better sealing role to the sub-salt reservoirs mainly formed in Paleozoic and dominated by organic buildup reef and anticline as types of reservoir traps. It is thought that the most favorable structural units are the zone beaded barrier reef of Permian and adjacent areas to Karachaganak oil-gas condensate field characterized by Carboniferous-Devonian reef carbonate rocks.

关 键 词：滨里海盆地 盐下层系 油气成藏 有利勘探目标 

分 类 号：TE111[石油与天然气工程—油气勘探]