论含油气盆地流体系统

我国含油气盆地地下水系统可分为油田水系统和溶滤水系统,二者之间按电性、富水性和矿化度大致以上、下第三系为界。含油气系统按成藏过程及其地质特征分为生成系统、运移系统和聚集系统。地下水系统是流体系统的主体部分,它包含了含油气系统。油田水系统与含油气系统关系十分密切,油气的生成、运移和聚集过程都是在油田水参与下进行的。溶滤水系统影响并改造着含油气系统,油气藏会在溶滤水作用下遭到破坏。异常高压由排水固结的不均衡所形成,它的存在阻止了油田水向上运移。含油气盆地流体系统研究是现代水文地质学的一个新的研究领域,是油气成藏研究的一种有效途径。

On fluid systems in a petroliferous basin

Fluid systems in a petroliferous basin can be divided into groundwater systems and petroliferous systems according to the property of fluids. The groundwater systems can be divided into oilfield water systems and infiltration water systems in the light of the characteristics of hydrodynamics, pressure, permeating flow and their environment. The interface between oilfield water systems and infiltration water systems is the one between the Neogene System and the Paleogene System in petroliferous basins of China. The petroliferous systems can be divided into generation systems and migration and accumulation systems on the basis of the accumulation process and their geologic characteristics. The groundwater systems are the main part of the fluid systems and they include petroliferous systems. There is a close relationship between oilfield water systems and petroliferous systems. The generation, migration and accumulation process of hydrocarbon took place with oilfield water. The petroliferous systems are affected and remarked by infiltration water systems. The hydrocarbon accumulation will be destroyed by infiltration water. Overpressure is formed by the unequilibrium of emitting water consolidation, and prevents the upward flow of oilfield water. The research on fluid systems in a petroliferous basin is a new field of modern hydrogeology and a benefit way to study the hydrocarbon accumulation.