东濮凹陷胡状集—庆祖集油田地层水特征及其石油地质意义  

Reservoir water features and their petroleum geology significance of Hu zhuangji-Qingzuji oilfield,Dongpu depression

作　　者：计曙东[1] 王学军[2] 刘玉华[3] 李西爱[2] 吕兰芳[2] 

机构地区：[1]中国石化华北油田分公司油田开发处,河南郑州450000 [2]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001 [3]中国石化中原石油勘探局地球物理测井公司,河南濮阳457001

出　　处：《油气地质与采收率》2013年第5期43-47,113-114,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"东濮凹陷油气富集规律与增储领域"(2011ZX05006-004-1)

摘　　要：地层水动力场的形成、演化与油气的运移、聚集具有十分密切的关系,水文地质旋回的不同阶段对油气运聚的影响也存在差异。东濮凹陷胡状集—庆祖集油田地层水分析结果表明,地层水主要为高矿化度的CaCl2型水,地层水化学组分中Cl-和Na+占绝对优势,对地层水化学空间分布具有控制作用,其形成与东濮凹陷盐湖沉积环境有关;受水岩作用影响,Ca2+,Mg2+,CO32-和SO42-等消耗性离子与矿化度的相关性不明显。研究区可划分出古近纪和新近纪—第四纪2个地层水动力演化旋回,其中前者可进一步划分为盆地沉降期泥岩压实水离心流阶段和盆地抬升期大气水下渗向心流阶段。压实水离心流水动力对东濮凹陷西部斜坡带的油气运聚具有建设作用,大气水下渗向心流水动力对油藏具有破坏作用;2种水动力环境交汇区,即二台阶是研究区油气成藏的有利区;新近纪—第四纪,一台阶为滞流水动力环境,可形成"自生自储"型油气藏。Analysis and test data of reservoir water of Huzhuangji-Qingzuji oilfield in western Dongpu depression shows that the water type is CaCl2 and is of high salinity. The chemical composition mainly includes C1-and Na+and controlled the spatial distribution of the reservoir water's composition. This is caused by saline lake sediment environment. Due to the water-rock interaction, the ions, such as Ca2+, Mg2+, CO32-, SO42-, have less correlation with salinity. Two underground hydrodynamic cycles have developed corresponding to Paleogene and Neogene- Quaternary respectively. The first cycle could be divided into two stages: ①clay compacting water centrifugal flow stage during Shahejie-Dongying subsidence; and ②atmospheric water filtration centripetal flow stage during Dongying uplift. The clay compacting water centrifugal hydrodynamic is positive to hydrocarbon accumulation, moreover, and the atmospheric water filtra tion centripetal hydrodynamic re-build reservoirs formed in western slope of Dongpu depression. The favorite belt for oil accumulation is from the intersection area of the two different hydrodynamic stages to the second terrace of the depression. The first terrace is formed in Neogene-Quaternary, which is of stagnant hydrodynamic conditions, and the self-generating and self-preserving reservoirs could develop there.

关 键 词：地层水 矿化度 动力演化 油气运聚 胡状集—庆祖集油田 东濮凹陷 

分 类 号：TE124.2[石油与天然气工程—油气勘探]