利用测井资料评价煤层气可采性  

Evaluating the fracture resistance and drainage diffi culty of coal reservoirs using log data

作　　者：刘之的 杨斌睿[1] 汤小燕 王伟[4] 纪亮[4] 蒋志浩 Liu Zhi-di;Yang Bin-rui;Tang Xiao-yan;Wang Wei;Ji Liang;Jiang Zhi-hao(School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an,710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi’an Shiyou University,Xi’an,710065,China;College of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China;Hancheng branch,Petrochina coalbed Methane Co.Ltd.,Xi’an 714000,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]西安石油大学,陕西省油气成藏地质重点实验室,西安710065 [3]西安科技大学地质与环境学院,西安710054 [4]中国石油煤层气有限公司西安分公司,陕西西安714000

出　　处：《Applied Geophysics》2024年第2期265-278,419,共15页应用地球物理（英文版）

基　　金：supported by the tight oil development demonstration project of Ordos basin in China(2017 ZX05069);the key scientifi c research program of Shaanxi provincial department of education(20JY056).

摘　　要：精准评价煤层气可采性,对于制定压裂排采方案至关重要。本文以鄂东气田韩城矿区煤储层为研究对象,充分利用测井、煤岩心化验分析及排采动态测试资料,对影响煤储层完井品质的煤体结构指数、煤岩脆性指数、地应力差异系数进行了计算,并构建了煤储层完井品质指数预测模型;详细分析了煤层气排采出水量与各影响因素间的内在关系,建立了煤层气排采出水量预测模型;有机融合煤储层完井品质指数和出水量预测指数,建立了煤层气开采性评价指数预测模型和划分标准,进而基于该套技术方法进行了煤层气开采性评价。研究结果表明:本文所述技术既充分考虑了完井品质对煤层气开采的影响,又兼顾了排采出水量,所评价的煤层气可采性与煤层气开采实际生产情况较为吻合。Evaluating the fracture resistance and drainage difficulty of a coal reservoir is essential in the coalbed methane(CBM)industry.In this study,the coal body structure and brittleness indices,as well as the diff erence coeffi cient of coal stress,were calculated for coal reservoirs in the Hancheng Gas Field in the Ordos Basin using log data,coal core testing analysis,and dynamic testing data,and a prediction model of the completion quality index was constructed on the basis of the results.In addition,a CBM drainage model was established after analyzing the intrinsic relationships between CBM drainage and the infl uencing factors.The evaluation criteria of the fracture resistance and drainage diffi culty were determined using the indices of the coal reservoir completion quality and water yield.The results showed that the technology fully considers the infl uences of the completion quality and water yield during CBM production.The evaluated data are in good agreement with those reported in the actual production of CBM.

关 键 词：煤层气 可采性 测井资料 评价 

分 类 号：TE37[石油与天然气工程—油气田开发工程] P631.81[天文地球—地质矿产勘探]