河南理工大学学报（自然科学版）2026，Vol.45Issue(1)：29-39,11.DOI:10.16186/j.cnki.1673-9787.2025050012
吐哈盆地深部煤储层特征与煤岩气勘探潜力
Characteristics of deep coal reservoirs and exploration potential of coal-measure gas in Turpan-Hami Basin
摘要
Abstract
Objectives Taddress insufficient geological understanding of deep coal-measure gas exploration in the Turpan-Hami(Tuha)Basin,this study focuses on well K1—the deep coal-measure gas well—system-atically investigating its coal reservoir characteristics and exploration potential.The aim is to reveal the gas occurrence patterns and accumulation models in deep coal measures,providing a scientific basis for large-scale exploration and development.Methods Coal petrographic analysis,three-dimensional CT scanning,overburden pressure porosity-permeability experiments,and isothermal adsorption tests are conducted.Pa-rameters such as coal maceral composition,pore structure,and dynamic permeability changes are inte-grated for a comprehensive analysis of the reservoir physical properties.Geological conditions of the Junggar and Ordos Basins are compared,and logging data combined with coalbed methane resource prediction methods are used to evaluate the exploration potential of deep coal-measure gas in the Tuha Basin.Results Deep coal reservoirs in the Tuha Basin are predominantly low-to medium-rank coals(K1 well:Ro=0.64%～0.94%),with vitrinite content up to 80.96%.The coal exhibits intact yet soft structures,characterized by"low porosity,low permeability,and complex pore structures."Porosity ranges from 2.99%to 7.55%,and permeability varies from 0.044×10-3 to 13.52×10-3 μm2,both decreasing with depth.The reservoirs demon-strate a dual-phase gas storage mechanism of"microporous adsorption+macroporous/fracture free gas."Field gas content tests indicate a total gas content of 14.24 to 18.23 cm3/g in the main coal seams,with free gas accounting for 35%～40%.The desorption rates are rapid(adsorption times ranging from 4.06 to 5.01 days),demonstrating a"coexisting dual-phase,free gas-dominated"storage advantage.Two reservoir formation models are identified:(1)the northern piedmont"adjustment-type"gas reservoir and(2)the central sag"self-sourced and self-reservoired"gas reservoir.Compared to the Junggar and Ordos Basins,the Tuha Basin exhibits moderate thermal evolution,high free gas ratios,and rapid initial production effi-ciency.Conclusions The deep coal-measure gas in the Tuha Basin shows significant exploration potential.The main coal seams in the Taibei Sag(Xishanyao Formation)contain resources reserves exceeding 2.2 tril-lion m3.The Wenjisang structural belt and Xiaocao South Slope emerge as prioritized exploration targets due to their"high free gas ratios and low desorption resistance.".关键词
深部煤储层/煤岩气/勘探潜力/赋存特征Key words
deep coal reservoir/coal-measure gas/exploration potential/gas occurrence characteristics分类
能源科技引用本文复制引用
张华,肖冬生,陈旋,武超,程祎,凯萨尔·吾热依木..吐哈盆地深部煤储层特征与煤岩气勘探潜力[J].河南理工大学学报（自然科学版）,2026,45(1):29-39,11.基金项目
国家科技重大专项(2024ZD1406000) （2024ZD1406000）
新疆维吾尔自治区重点研发专项项目(2024B03002) （2024B03002）
中国石油青年科技专项项目(2024DQ03025) （2024DQ03025）
中国石油天然气股份有限公司攻关性应用性科技专项项目(2023ZZ18YJ03) （2023ZZ18YJ03）
