苏里格气田苏53区块天然气储量计算及其参数确定方法

GAS RESERVE CALCULATION OF SU 53 BLOCK IN SULIGE GASFIELD AND METHOD TO DETERMINE RESERVE PARAMETERS

根据《苏里格地区天然气基本探明储量计算办法》,以苏里格气田苏53区块天然气储量计算为研究对象,重点介绍了区块容积法储量计算中有效储层下限的确定标准、计算参数的确定方法及资料录取的要求:有效储层下限按岩性、物性、含油气性和电性"四性"标准划分;含气面积利用钻井、试气、测井及地震预测成果进行综合圈定的确定方法;有效厚度的取值以气层识别为基础,综合测试成果以测井"四性"关系划分为依据;用测井资料确定有效孔隙度时,必须用岩性分析资料进行标定;同时提出了原始含气饱和度、原始天然气体积系数等其他计算参数的确定方法,并对储量进行综合评价。

This paper presents the standard and method to determine lower limit of effective reservoir during reserve calculation of Su 53 block in Sulige gasfield by volume method.This lower limit is classified by 'four properties' of reservoir including lithology,physical property,oil-bearing property and electrical property.To select an effective thickness is based on the recognition of gas reservoir.An effective porosity,determined by well-logging data,must be calibrated by lithological analysis data.Finally,some other parameters of original gas saturation and gas volume coefficient must also be calibrated and reserves should be evaluated comprehensively.