克拉玛依百口泉油田地层水化学特征与油气成藏关系

Relationship of Hydrochemical Characteristics of Formation Water and Hydrocarbon Accumulation in Baikouquan Oilfield in Karamay

石油(天然气)与地层水是一对孪生姐妹,油气的生成、运移、聚集、保存和散失都是在地层水的环境里或是在地层水的参与下进行的[1]。地层水运动是油气运移聚散的动力和载体,其化学成分直接或间接地反映出油气赋存的环境与条件。地层水与油气在地质历史进程中的活动是相互依存、制约的因果关系。从水文地质观点和角度研究油气水的演化,剖析水—油相互作用的关系,掌握地层水对油气藏形成和分布的作用,同时利用地层水的某些离子特征和特征系数来反映油气的保存条件、地层的封闭程度、油气的运移规律。研究油田水文地球化学的目的在于寻找不同水文地质条件下油气运聚的水化学特征及其变化规律,而后利用水化学的变化特征来寻找有利的油气聚集带。因此研究不同地区不同层系的油田水文地质,也是寻找油气藏的一种方法,可为油气勘探提供依据,直接为生产服务,同时也是进行含油气远景评价的必备基础。

Oil or natural gas is. always associated with formation water.Hydrocarbon generation,migration,accumulation ,preservation and loss all take place in the environment of formation water or are all accompanied by the participation of formation water.The movement of formation water is the driving force and the cartier of oil and gas migration and accumulation ,and its chemical compositions can directly or indirectly reflect the environments and conditions of hydrocarbon occurrence.The movements of formation water and oil-gas are interdependent and have the relationship of restriction and cause and effect.It is necessary to study the evolution of oil ,gas and water from hydrogeological view ,analyze the mutual action of oil and water,understand the effect of formation water on formation and distribution of oil and gas reservoirs.By applying some ion features and characteristic factors of formation water,it can reflect the close relation of the preservation conditions of oil and gas,closing degree of formations and oil and gas migration.The purpose of study on the hydrogeochemistry of the field is to find out the hydrochemical features and the changing laws of oil and gas migration and accumulation under different hydrogeological conditions,and further to search for favorable oil and gas accumulation zones by using the variation features of formation water.Therefore ,to study the hydrogeology of field water in different areas and different horizons is also a method to search for oil and gas reservoirs,which can provide a basis for oil and gas exploration and serve for the production.It is also an essential base for evaluation of oil and gas plays.