滨里海盆地Adaiski区块盐下沉积环境与成藏组合分析  

Pre-Salt Sedimentary Environment and Oil and Gas Reservoir Assembly in Block Adaiski of North Caspian Basin

作　　者：赵凤英[1] 顾俊[2] 郭念发[2] 

机构地区：[1]西北大学地质系,陕西省西安市710069 [2]中国石化华东分公司规划设计研究院,江苏省南京市210036

出　　处：《中国石油勘探》2007年第5期71-75,共5页China Petroleum Exploration

摘　　要：Adasiki区块位于滨里海盆地的东南部,早二叠世晚期发育巨厚盐岩,盐岩覆盖之下的泥盆系—二叠系为盐下含油气层系,是一套以碳酸盐岩和碎屑岩为主的海相建造。由于长期处于南恩坳陷沉积环境中,该建造烃源岩丰富,储集岩发育,其上覆的巨厚盐岩是有利的盖层,它们为盐下油气聚集成藏提供了有利的地质条件。研究表明,盐下油气藏是区内油气藏的重要组成部分,大型圈闭主要集中在盐下层系中。从沉积环境与岩相古地理,油气成藏的生、储、盖组合入手,详细分析了Adasiki区块盐下油气成藏的地质条件,为盐下进一步勘探提供了必要的准备。Block Adaiski is located southeast of North Caspian Basin,where salt rock of mega-thickness developed in the late stage of Early Permian. Devonian-Permian covered under the salt rock belongs to pre-salt oil and gas bearing series,which is a set of marine facies formations mainly composed of limestone and clastic rock.Having been located in the sedimentary setting of Nan'en Depression,the facies formation features in rich source rocks, well-developed reservoir rocks,and favorable cap rocks,providing favorable geological conditions for pre-salt hydrocarbon accumulation.Research shows that pre-salt hydrocarbon reservoirs are the main components of the reservoirs in the area.Large traps are mainly distributed in pre-salt series. According to sedimentary settings and lithofacies palaeogeography as well as source-reservoir-cap rock combinations of hydrocarbon reservoirs,geological conditions for forming pre-salt oil and gas reservoirs in Block Adaiski are analyzed in detail,laying the foundation for further pre-salt exploration.

关 键 词：沉积相 盐下油气藏 圈闭评价 Adasiki区块 滨里海盆地 

分 类 号：TE112[石油与天然气工程—油气勘探]