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在广泛收集低阻油气层资料的基础上对低阻成因进行了划分,进一步明确了低阻油气层的概念与分类。低阻成因分为内因和外因,内因是指油气层本身岩性物性变化引起的,外因是指非地层因素变化引起的,如地层水变化。针对低阻油气层的评价难点,首次提出用测井相的概念进行低阻油气层的定性识别,见到了明显成效。提出并完善了双孔隙水模型[1],应用多种矿化度盐水的岩电测量,通过线性拟合及理论推导解决了模型参数(如饱和度指数等)的确定问题,从而比较容易地直接用该模型进行饱和度定量计算。应用该模型计算得到的油气层含水饱和度与束缚水饱和度误差一般不超过5%。这带有普遍性的方法在数油田的实际应用证明是成功的。
On the basis of extensively collecting data of low resistivity oil and gas reservoirs, the causes of low resistivity are divided and the concept and classification of low resistivity oil and gas reservoirs are further clarified. The cause of low resistance is divided into internal and external causes. Internal causes are caused by changes in lithologic physical properties of the oil and gas layers themselves. External causes are caused by changes in non-earth factors, such as formation water changes. In view of the difficulty of the evaluation of low resistivity reservoirs, the concept of well logging facies was first proposed to qualitatively identify the low resistivity reservoirs, and obvious results were observed. Proposed and perfected the double-pore water model [1], applied the measurement of rock salt with multiple salinities, and solved the problem of determining the model parameters (such as saturation index) through linear fitting and theoretical derivation, so that it is relatively easy The model is used to calculate the saturation directly. The errors of water saturation and irreducible water saturation calculated by this model are generally not more than 5%. The practical application of this universal method in several fields proved to be successful.