物探与化探2025，Vol.49Issue(3)：578-587,10.DOI:10.11720/wtyht.2025.1415
克孜勒努尔组深层煤层游离气含气饱和度计算
Calculation of free gas saturation in deep coal seams in the Kezilenuer Formation
摘要
Abstract
Compared to shallow coal seams,deep coal seams have gradually transitioned into a complex geologic environment character-ized by high temperatures,pressures,and in situ stresses,and low permeability.Temperature and other conditions result in enhanced negative adsorption effects,leading to free gas production.Free gas saturation serves as a typical parameter for predicting reserves and guiding the optimal design of production and drainage plans,rendering its accurate determination highly significant.This study investi-gated the coalbed methane in the Jurassic Kezilenuer Formation in the tectonic zone north of the Kuqa depression within the Tarim Ba-sin.It calculated the free gas saturation in the target layer based on adsorption isotherms,field analysis,inversion,the element-modi-fied bulk modulus method,and the Archie,Gassmann-Wood,and Gassmann-Brie equations.Furthermore,it comparatively analyzed the results derived from these calculation methods combined with two-dimensional nuclear magnetic resonance data.The results indicate that the element-modified bulk modulus method and the Gassmann-Wood and Gassmann-Brie equations are more appropriate calculation methods for the study area.Overall,the results of this study provide a valuable reference for calculating free gas saturation in deep coal seams in the study area,further guiding and advancing the exploration and production of deep coalbed methane.关键词
深层煤层气/游离气饱和度/克孜勒努尔组/二维核磁Key words
deep coalbed methane/free gas saturation/Kezilenuer Formation/two-dimensional nuclear magnetic resonance分类
天文与地球科学引用本文复制引用
别康,蔡天,信毅,刘粤蛟,韩闯,孙建孟..克孜勒努尔组深层煤层游离气含气饱和度计算[J].物探与化探,2025,49(3):578-587,10.基金项目
国家自然科学基金项目"基于数字岩石的深部煤层气弹性和声学响应机理研究"(42474156) （42474156）
塔里木油田公司科技项目"库车北部构造带侏罗系煤岩气测井解释评价方法研究"(T202424) （T202424）
