石油与天然气化工2024，Vol.53Issue(2)：94-100,7.DOI:10.3969/j.issn.1007-3426.2024.02.014
人工裂缝参数对CO2-ESGR中CO2封存和CH4开采的影响
Effects of artificial fracture parameters on CO2 sequestration and CH4 production in CO2-ESGR
摘要
Abstract
Objective Fracture systems in shale reservoirs have an important impact on CH4 production and CO2 sequestration,and different geological characteristics of reservoirs have their corresponding optimal fracturing schemes.The study aims to investigate the effect of artificial fracture parameters on CO2 sequestration and CH4 production of Yanchang formation shale reservoirs in Ordos Basin.Methods Based on the geological conditions of shale reservoirs of Yanchang formation in Ordos Basin,a dual-porosity,dual-permeability homogeneous model was established to analyze the effects of artificial fracture half-lengths,fracture width,fracture height,fracture spacing,and the number of fractures on CO2 sequestration and CH4 production in CO2-ESGR.Results The results showed that fracture half-length,fracture width and fracture height were positively correlated with CO2 sequestration and CH4 production,among which fracture width had the greatest influence.When the fracture width increased from 5 mm to 25 mm,CO2 sequestration increased by 112.69％and CH4 production increased by 87.11％at most.Both fracture interval and fracture number increased CO2 sequestration and CH4 production.However,when the horizontal well length was the same,the increasing of fracture number had a far greater impact on CO2 sequestration and CH4 production than that of fracture interval.When the number of fracture increased from 2 to 6,CO2 sequestration increased by 151.92％and CH4 production increased by 137.81％at most.Conclusions During the development process,strategically enhancing the half-length,height,width,and quantity of artificial fractures can facilitate efficient sequestration of CO2 and extraction of CH4.关键词
CO2地质封存/页岩气/人工裂缝/数值模拟/CO2-ESGRKey words
CO2 sequestration/shale gas/artificial fracture/numerical simulation/CO2-ESGR引用本文复制引用
刘思雨,杨国栋,黄冕,尹书郭,马鑫,包琦..人工裂缝参数对CO2-ESGR中CO2封存和CH4开采的影响[J].石油与天然气化工,2024,53(2):94-100,7.基金项目
国家重点研发计划项目(2019YFE0100100)"多井组CO2-EWR与储层系统动态监测技术研究" （2019YFE0100100）
国家自然科学基金"CO2封存的地质结构透明化表征方法与埋存场地选址"(42141009) （42141009）
海洋地质资源湖北省重点试验开放基金"超临界CO2对页岩层的地球化学作用机制研究"(MGR202003) （MGR202003）
