测井技术2026，Vol.50Issue(4)：703-714,12.DOI:10.16489/j.issn.1004-1338.2026.04.014
基于动静态测井测试资料的CO2气窜通道识别与治理
Identification and Control of CO2 Gas Channeling Paths Based on Dynamic and Static Logging Test Data
摘要
Abstract
Aiming at the challenges including the easy occurrence of CO2 channeling,difficulty in identifying channeling pathways,and insufficient basis for regulation and control during CO2 flooding development of ultra-low permeability Chang8 reservoirs in the Ordos basin,this paper integrates geological,logging,monitoring and production data to construct a comprehensive evaluation and control technology for CO2 flooding gas channeling,which covers accurate identification of natural fractures,dynamic-static combined analysis of gas flooding performance,and integrated modeling and numerical simulation.The research results show that:①An improved R/S analysis fracture identification method combining the Hurst index and second-order difference is established based on imaging and conventional static logging data.Compared with the identification results from electrical image logging,this method achieves a coincidence rate of 88.4%,which realizes accurate quantification of reservoir fracture development and lays a solid foundation for the identification of gas channeling paths.②Dynamic and static data including reservoir high-permeability strips,fracture distribution,injection profiles and wellhead CO2 concentration responses are analyzed to clarify the corresponding relationships between preferential seepage channels and gas breakthrough as well as production decline in oil wells.③A heterogeneous reservoir mechanistic model is built to determine the timing and geological conditions for gas channeling control.The control window is defined as a gas-oil ratio(GOR)of 550～2 500 m3/m3,and the geological thresholds for classified control are permeability contrast ratios of 5,10 and 30.④The integrated modeling and numerical simulation technology is adopted to iteratively calibrate the reservoir numerical model with a history matching accuracy of 90%,which accurately characterizes preferential seepage channels.The injection-production scheme is further optimized on the numerical model,a differentiated regulation strategy is proposed,and the optimal asynchronous injection-production cycle of 1 to 2 months is confirmed.The proposed technology can effectively restrain invalid gas channeling and simultaneously improve oil displacement efficiency and CO2 geological storage performance.The research outcomes provide reliable comprehensive log evaluation technical support for the efficient development of CO2 flooding in ultra-low permeability reservoirs.关键词
CO2驱/气窜通道/裂缝识别/动静结合分析/气窜评价/注采调控/建模数模一体化/测井综合评价Key words
CO2 flooding/gas channeling path/fracture identification/dynamic-static combined analysis/gas channeling evaluation/injection-production regulation/integrated modeling and numerical simulation/comprehensive log evaluation分类
天文与地球科学引用本文复制引用
郭程飞,章海宁,李震,裴阳,刘东明,王璇,廖海博,雷梦..基于动静态测井测试资料的CO2气窜通道识别与治理[J].测井技术,2026,50(4):703-714,12.基金项目
国家科技重大专项课题"复杂叠置气藏储层精细描述技术研究"(2026ZD1405601) （2026ZD1405601）
中国石油天然气集团有限公司青年科技专项资助项目"低渗透油藏长期注CO2测井评价与多场模拟研究"(2024DQ03172) （2024DQ03172）
中国石油集团测井有限公司博士后课题资助项目"基于实时动态的高精度油藏数值模拟关键技术研究"(F-D60024KY) （F-D60024KY）
