松辽盆地北部中部组合流体动力场及其与构造的相互作用

发布时间：2018-04-16 02:36

本文选题：松辽盆地北部 + 流体动力场　；参考：《东北石油大学》2017年硕士论文

【摘要】：流体动力场是影响油气运移、聚集的关键因素,其在相当大的程度上控制了盆地油气水分布。根据松辽盆地水动力场的平面及剖面特征,并通过模拟分析其演化历史,从而研究其与构造的相互作用。在前人研究的基础上,本文分析了松辽盆地北部现今流体动力场特征,表现为泥岩欠压实作用和储层压力空间分割性明显。松辽盆地内部发育了4套欠压实泥岩,从垂向上将盆地分割为5层,分别对应于5大含油气组合;储层流体动力场形成了3大异常压力系统,即以齐家古龙凹陷为中心的高压系统,三肇凹陷及其以东的异常低压系统和东北隆起带和北部倾没带的异常低压系统。松辽盆地晚期流体动力场演化的总体面貌是由压实驱动的压实流向由地形驱动的流体的演化过程,受晚期构造活动的影响,异常压力在剖面上向西迁移。姚家组末期—白垩末期抬升剥蚀之前流体压力逐渐积聚,流体动力场以异常压力驱动的流体动力场特征为主;而白垩末期之后至今为异常压力逐渐消散,流体动力场由以异常压力驱动型为主逐渐演变为北部受大气降水下渗为特征。晚期构造活动造就了松辽盆地特殊的三大异常压力系统,同时盆地的流体动力场对盆地内部凹陷层的构造样式,构造反转发生的部位存在明显的影响。异常压力流体动力场降低了断面的摩擦系数和抗压强度,从而有利于构造的发生和发展;同时构造活动进一步提高了流体活动的强度,从而促进了构造反转的发生。构造和流体的这种相互强化的关系对油气的运聚至关重要。
[Abstract]:Hydrodynamic field is a key factor affecting hydrocarbon migration and accumulation, which controls the distribution of oil, gas and water to a large extent.According to the plane and profile characteristics of the hydrodynamic field in Songliao Basin, the interaction between the hydrodynamic field and the structure is studied by simulating the evolution history of the hydrodynamic field.On the basis of previous studies, the characteristics of the present hydrodynamic field in the northern Songliao Basin are analyzed, which are characterized by undercompaction of mudstone and obvious spatial segmentation of reservoir pressure.There are four sets of undercompacted mudstone developed in Songliao Basin, which are divided into 5 layers from vertical to vertical, corresponding to 5 oil and gas assemblages respectively, and three abnormal pressure systems are formed in the hydrodynamic field of the reservoir.That is, the high pressure system centered on Qijia Gulong depression, the abnormal low pressure system in Sanzhao depression and its east, and the abnormal low pressure system in the northeast uplift zone and the northern dip belt.The general feature of fluid dynamic field evolution in late Songliao Basin is the evolution of compaction driven by compaction to the fluid driven by topography. Due to the influence of late tectonic activity, abnormal pressure migrates westward in the profile.The fluid pressure accumulates gradually before uplift and denudation in the late stage of Yaojia formation to the late Cretaceous stage, and the hydrodynamic field is mainly characterized by the fluid dynamic field driven by abnormal pressure, while the abnormal pressure gradually dissipates after the late Cretaceous period.The hydrodynamic field gradually evolved from the abnormal pressure driven type to the infiltration of atmospheric precipitation in the north.The late tectonic activity resulted in three special abnormal pressure systems in Songliao Basin, and the hydrodynamic field of the basin had obvious influence on the structural style of the inner sag and the position where the tectonic inversion occurred.The abnormal pressure hydrodynamic field reduces the friction coefficient and compressive strength of the section, which is beneficial to the occurrence and development of the structure, and the tectonic activity further enhances the strength of the fluid activity, thus promoting the occurrence of the tectonic inversion.This mutually reinforcing relationship between structure and fluid is crucial to oil and gas migration and accumulation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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