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为解决环江油田侏罗系低阻油层测井解释难度大,油水层判别困难等问题,通过对地质、测井、钻井资料以及岩石微观等方面研究分析了油层低阻成因,研究认为该地区油层低阻主要是受空隙结构差异大、地层水矿化度偏高、束缚水含量高、储层岩石亲水和泥浆侵入五方面原因影响结果,并总结出电阻率-声波时差交汇图版法和视地层水电阻率-自然伽马交层图版法两种油水油识别方法。总结出了两种油水层识别技术:(1)电阻率-声波时差交汇图版法;(2)视地层水电阻率-自然伽马交会图版法。
In order to solve the problems of logging interpretation of the Jurassic low-resistivity reservoirs in the Huanjiang Oilfield and the difficulty of discriminating the oil-water reservoirs, the paper analyzes the genesis of the low-resistance reservoirs by analyzing the geology, well logging, drilling data and the rock microcosm. The low resistance of the oil layer is mainly affected by five factors such as large gap structure difference, high salinity of formation water, high irreducible water content, reservoir rock hydrophilicity and mud invasion, and summed up the resistivity-sound wave transit time chart method and Hydrocarbon Resistivity - Natural Gamma Cross - Layered Plate Method Two Oil - Water Oil Identification Methods. Summed up two oil and water layer identification technology: (1) Resistivity - sonic time difference intersection plate method; (2) Depending on the formation water resistivity - natural gamma cross map version.