论文部分内容阅读
在分析高邮凹陷古近系现今地层水化学、水动力场分布特征的基础上,结合高邮凹陷构造演化特征,对高邮凹陷古近系地下水动力的成因和演化及其与油气运聚的关系进行了深入研究,预测了下一步有利勘探区.结果表明:高邮凹陷上含油系统南断阶和北部柘垛低凸起为大气水下渗向心流区,深凹带发育泥岩压实水离心流;中含油系统大气水下渗影响范围变小,泥岩压实水离心流区向北偏移,影响范围进一步减小,越流泄水区范围扩大.油气的运移、聚集、成藏与地下水动力密切相关.南断阶、北部柘垛低凸起及局部隆起区在构造抬升剥蚀期,断裂活动、开启,大气水沿断裂带下渗,同时油气通过浮力沿断层再分配或者散失,油气不断运移调整、油气藏遭受破坏;而高邮凹陷内斜坡、永安-富民西部地区、南部断阶带真②断裂下盘及周庄-陈堡地区水动力条件优越,为较有利勘探区.
Based on the analysis of the present hydrochemical and hydrodynamic field distribution characteristics of the Paleogene in the Gaoyou sag and the tectonic evolution of the Gaoyou sag, the relationship between the evolution of the groundwater dynamics and the hydrocarbon migration and accumulation in the Paleogene in the Gaoyou sag The further exploration and prediction of the favorable prospecting area are carried out.The results show that the southern fault of the upper oil system in the Gaoyou sag and the low protuberance of the stack in the north are infiltrated into the meridional flow in the atmosphere, The influence range of atmospheric water infiltration in the oil-bearing system becomes smaller, the centrifugal flow area of the compacted water in mudstone is offset to the north, the influence range is further reduced, and the scope of the overflow flow area is expanded. The migration, accumulation, reservoir formation and groundwater power Are closely related to each other.Early uplift and uplift of the southern stacks in the northern uplift and uplift in tectonic uplifting and denudation, fault activity, open, atmospheric water infiltration along the fault zone, while oil and gas through the buoyancy along the fault redistribution or loss, And the oil and gas reservoirs were destroyed. The hydrodynamic conditions in the inner slope of Gaoyou sag, Yongan-Fumin western region, the fault zone of Zhenjiang fault in the southern part of the Qinghai-Tibet fault belt and the Zhouzhuang-Chenbao area are superior and favorable Exploration area.