中国石油大学学报（自然科学版）2024，Vol.48Issue(4)：12-23,12.DOI:10.3969/j.issn.1673-5005.2024.04.002
准噶尔盆地白家海地区西山窑组深部煤岩储层孔隙结构表征及发育主控因素
Pore structure characterization and main control factors of deep coal reservoir of Xishanyao Formation in Baijiahai area,Junggar Basin
摘要
Abstract
Understanding the pore structure characteristics of deep coal reservoir is crucial for exploring and developing deep coal bed methane.This study focuses on the coal seam of the Jurassic Xishanyao Formation in Baijiahai Bulge and its sur-rounding areas in the Junggar Basin,employing various experimental methods such as porosity and permeability under over-burden pressure,scanning electron microscopy,high-pressure mercury injection,low-temperature liquid nitrogen adsorp-tion,and carbon dioxide isothermal adsorption to analyze coal reservoir characteristics.The results indicate that the coal of Xishanyao Formation features low water content,ultra-low ash content,low volatile matter,and a low degree of evolution,predominantly comprising vitrinite and inertinite macerals.The coal reservoir of Xishanyao Formation exhibits a dual medium of pore-fracture reservoir space,demonstrating favorable reservoir properties.The coal reservoirs of Xishanyao Formation can be classified into three types.Types I has high porosity but poor permeability.Types II is the predominant reservoir type in the study area,which is further divided into Types II1 and Types II2.Types II1 has medium porosity with good permeability.Types II2 and Types III are characterized by micropores and poor reservoir properties.The pore structure of these coal reser-voirs in Xishanyao Formation is primarily controlled by factors such as ash mass fraction,vitrinite volume fraction,inertinite volume fraction,and burial depth.关键词
深部煤岩储层/孔隙结构/准噶尔盆地/白家海凸起/西山窑组Key words
deep coal reservoir/pore structure/Junggar Basin/Baijiahai Bulge/Xishanyao Formation分类
能源科技引用本文复制引用
胡鑫,姚卫江,胡正舟,黄福成,汪洋,汪孝敬..准噶尔盆地白家海地区西山窑组深部煤岩储层孔隙结构表征及发育主控因素[J].中国石油大学学报（自然科学版）,2024,48(4):12-23,12.基金项目
中国石油集团公司攻关性应用性科技专项(2023ZZ18YJ02) （2023ZZ18YJ02）
中国石油天然气股份有限公司科技项目(2021DJ2306) （2021DJ2306）
中石油新疆油田重大科技专项(2024XJZX0302) （2024XJZX0302）
