摘要
滨里海盆地Sagizski区块是一个油气富集的区块,先后已发现20个油田,这些油田都位于盐上地层中。对该区块盐上层系的基础地质、石油地质特征、油田分布、成藏条件进行了综合分析。研究表明在纵向上油藏主要位于中三叠统和中侏罗统;在平面上,油藏主要围绕有效的大的盐窗分布,早期发现的油藏主要集中在Sagizski区块西部,多为盐隆顶部的中侏罗统和下白垩统油藏,最近几年发现的油藏主要集中在东部,中三叠统油藏较多。并进一步指出盐檐(盐隆肩部)部位中三叠统往往具有有利的成藏条件,是以后勘探最有利的目标区。
Block Sagizski in the Pre-Caspian Basin is rich in hydrocarbon, and 20 oilfields have been discovered successively, all of which are located in the Post-Salt strata. This paper analyzed comprehensively the elementary geology, features of oil geology, oilfield distribution, and hydrocarbon accumulation conditions of this Block. The analysis revealed that the Middle Triassic and the Middle Jurassic were the main horizon of hydrocarbon accumulation vertically; the reservoirs were mainly distributed around the large oil windows horizontally. The oilfields discovered in early years concentrated in the west of Block Sagizski, most of which were the Middle Jurassic and the Lower Cretaceous reservoirs on the top of salt swell, while those discovered in recent years concentrated in the east of the Block and most of them were the Middle Triassic reservoirs. This paper also pointed out the middle Triassic strata on the salt eaves (the shoulder of the salt swell) had favorable hydrocarbon accumulation conditions, and they would be favorable exploration targets in the future.
出处
《中国石油勘探》
CAS
2012年第2期57-61,89,共5页
China Petroleum Exploration
关键词
成藏规律
盐上层系
Sagizski区块
滨里海盆地
regularity of hydrocarbon accumulation
Post-Salt strata
Block Sagizski
Pre-Caspian Basin
