基于变岩电参数饱和度解释模型研究  

On the Saturation Computation Model Based on Variable Rock-electro Parameters

作　　者：李跃刚[1,2] 路中奇[1,2] 石林辉 刘利锋[1,2] 

机构地区：[1]中国石油长庆油田苏里格气田研究中心,陕西西安710018 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《测井技术》2015年第2期181-184,195,共5页Well Logging Technology

基　　金：致密气藏开发重大工程技术研究(2010E-23)

摘　　要：鄂尔多斯盆地苏里格气田属于典型的低孔隙度、低渗透率致密砂岩气藏,盒8段和山1段储层成岩后生作用强烈,孔隙类型多样,结构复杂,有着严重的纵向和横向非均质性。阿尔奇公式计算固定的岩电参数值在反映低孔隙度低渗透率储层特征方面存在一定的局限性,导致基于阿尔奇公式得到的饱和度计算结果误差较大,难以满足储层精细解释的需求。提出一种应用变岩电参数计算含气饱和度的新方法。实际应用效果表明,与采用固定岩电参数相比,该方法得到的含气饱和度与密闭取心井岩心分析饱和度符合更好,计算精度更高,为低孔隙度低渗透率砂岩储层评价提供了更为准确的饱和度参数。Sulige gas field in Erdos Basin is a typical low porosity, low permeability and tight sandstone gas reservoir. As the main gas producing formation of Sulige gas field, the sections of He8 and Shanl reservoir has strong epidiagenesis, various pore types and complicated pore structures, and obvious heterogeneity both in vertical. Archie;s formula is the most widely application formula for oil （gas） reservoir evaluation. However the fixed rock-electro parameters have certain limitations in some aspects of reflecting characteristics of the low porosity and low permeability reservoir, which led to bigger saturation calculation error based on the Archie;s formula, so, it is difficult to meet the requirement of fine reservoir interpretation. Based on this, we propose a new method for calculating gas saturation by variable rock-electro parameters. Practical application shows that the method has higher precision comparing with the fixed electrical parameters of rocks. It provides more accurate parameters for saturation evaluation of low porosity and low permeability sandstone reservoir.

关 键 词：测井解释 低孔隙度 低渗透率 非均质性 变岩电参数 饱和度 

分 类 号：P631.84[天文地球—地质矿产勘探]