胡状集油田胡5断块区油藏低阻油层成因分析

Analysis on cause of low resistance oil layer formed in Hu5 block oil reservoir

国内近年来不少油田都有低电阻率油藏的发现和研究,东濮凹陷也有不少地区发现了低电阻率油层,东濮凹陷西斜坡胡状集地区也存在低阻油层形成的条件。近年来在老区增储挖潜过程中加强对低阻油层形成条件的认识和研究,发现了一批低阻油层,深化了对低阻油层形成条件的认识,提高了低阻油层解释的成功率。本文以胡5块为例从地质特征和储层性质方面对低阻油层的成因进行了分析,认为该块地层平缓、泥质含量重、束缚水含量高、岩石亲水是产生低电阻率油层的主要因素。

While the old wells are reexamined in Hu5 block oil reservoir for many years, a piece of low resistance oil layer are discovered, whose electric resistance rate near to or high in the surroundings mire rock strata, and have a certain productivity after production. For raising the hermeneutic success rate of the low resistance oil layer effectively, the cause of low resistance oil layer formed in Hu5 block oil reservoir is analysed from the geology characteristic and the layer property aspects. The main factors those produce the low electric resistance rate oil layer are that the formation distribute gentle, the mire quality content is heavy and tie up the water content is high, and the rock get close to water.