测井技术2025，Vol.49Issue(5)：704-713,10.DOI:10.16489/j.issn.1004-1338.2025.05.006
基于多品质参数耦合的深地煤岩气储层反演预测方法
Deep Coal Rock Gas Reservoir Inversion Prediction Method Based on Multi Quality Parameter Coupling
摘要
Abstract
As a new type of unconventional natural gas resources,deep coal rock gas has become a hot spot for exploration in major oil and gas fields in China.However,it is different from conventional shallow coalbed methane.Adsorbed gas and free gas coexist in deep coal rock gas.Conventional shallow coalbed methane evaluation methods are not applicable,and seismic inversion prediction of dominant reservoir development zones is difficult.In order to accurately evaluate the porosity and gas saturation of deep coal rock gas,and predict and characterize the dominant reservoir development zone of deep coal rock.In this paper,the deep coal rock gas reservoir in Baijiahai uplift of Junggar basin is taken as an example.Firstly,based on the analysis data of coal rock industrial components,the skeleton density of coal rock industrial components is solved by nonlinear weighted least squares method,and the calculation model of variable skeleton porosity is established.Based on the cubic fracture group model,the calculation model of cleat porosity of coal rock is established by double lateral iteration method.Based on the test data and logging data,the calculation model of reservoir gas saturation is established by using the ratio method of measured acoustic time difference and reconstructed acoustic time difference background value.Then,based on the analysis of the response mechanism of logging curve,the calculation model of fragmentation factor and conductivity factor is constructed to qualitatively evaluate the damage degree of coal body.Finally,the multi-parameter fusion is used to construct the matrix quality and coal structure quality model of deep coal rock gas reservoir,and the seismic inversion technology under the constraint of logging data is combined to realize the prediction and characterization of the dominant reservoir development zone of deep coal rock.The research results show that the method has a significant effect on the prediction of the development zone of the dominant reservoir of deep coal rock,and the prediction results are consistent with the oil test results of the drilled wells,which provides technical support for the exploration and development of deep coal rock gas and the optimization of the scheme.关键词
准噶尔盆地/深地煤岩气/变骨架孔隙度/含气饱和度/煤体结构/基质品质/结构品质/测井约束反演Key words
Junggar basin/deep coal rock gas/variable skeleton porosity/gas saturation/coal mass structure/matrix quality/structural quality/well logging constrained seismic inversion引用本文复制引用
毛晨飞,张啸,张文芊,张奔,陈国军,高明,雍林,黄平..基于多品质参数耦合的深地煤岩气储层反演预测方法[J].测井技术,2025,49(5):704-713,10.基金项目
中国石油天然气股份有限公司重大科技专项"新疆地区中深层低煤阶煤岩气勘探开发关键技术研究"(2021DJ2306) （2021DJ2306）
