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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。
The formation and evolution of the formation hydrodynamic field are closely related to the migration and accumulation of oil and gas. The influence of different stages of hydrogeologic cycle on the migration and accumulation of oil and gas are also different. The results of formation water analysis of Huzhuji-Qingzuji Oilfield in Dongpu Depression show that the formation water is mainly CaCl2-type water with high salinity, and Cl- and Na + in formation water have absolute predominance. The chemical distribution of formation water It has a controlling role, and its formation is related to the depositional environment of salt lake in Dongpu Depression. The correlation between the depleted ions such as Ca2 +, Mg2 +, CO32- and SO42- and salinity is not obvious due to the effect of water-rock. The study area can be divided into the Paleogene and Neogene - Quaternary two hydrodynamic evolution cycle, in which the former can be further divided into basin subsidence mudstone compaction water centrifugal flow stage and the basin uplifting atmospheric infiltration of the atmosphere stage. The hydrodynamic force of the compacted water centrifugal stream has a role in the hydrocarbon migration and accumulation in the western slope belt of the Dongpu Depression, and the atmospheric hydrodynamic infiltration into the heart of the Dongpu Depression can have a damaging effect on the reservoir. The two hydrodynamic environment intersection areas, ie, the two steps are the study area Favorable area for oil and gas accumulation. In the Neogene-Quaternary, a step is a stagnant hydrodynamic environment that can form a “self-generating reservoir” reservoir.