天然气勘探与开发2025，Vol.48Issue(2)：81-91,11.DOI:10.12055/gaskk.issn.1673-3177.2025.02.008
川南深层页岩气高产井模式探索
High-production well models for deep shale gas reservoirs in southern Sichuan Basin:A case study of Longmaxi Formation of H202 well area in Yuxi block
摘要
Abstract
Deep shale gas reservoirs in the Upper Ordovician Wufeng-Lower Silurian Longmaxi Formations in the Yuxi block have great potential for further enhancing and stabilizing shale gas production of the southern Sichuan Basin.The H202 well area in this block has already entered the stage of large-scale productivity construction,but still faces challenges such as significant differences in the development effects of producing wells and unclear factors affecting productivity.To technically support the subsequent development of deep shale gas in the area,a geology-engineering integrated study was conducted on typical producing wells,by considering the factors including the distribution of Class Ⅰ continuous reservoirs,targets,fracture characteristics and distribution,fracturing intensity,and proppant types.Based on summarizing the drainage gas recovery characteristics and production effects of producing wells,comparing and evaluating comprehensively the adaptability of development strategies,drilling techniques,and fracturing processes,the high-production well models in areas with fracture network were established,and the optimization measures were proposed for subsequent development of wells to be produced.The results indicate that,(i)static parameters of the reservoir are fundamental,and the areas with fracture network are selected for well placement by taking into account the basic characteristics including structure,sedimentation,reservoir,and fracture distribution;(ii)attention should be taken to ensure the penetration rate of high-quality reservoir and increase the drilling length of platinum target zone;(iii)operation parameters(displacement of 20 m3/min,fracturing fluid intensity of 40 m3/m,and proppant injection intensity of 4 t/m)should be improved in the areas with fracture network,so as to enhance the reservoir stimulation effects;and gradual prevention and control measures should be taken in the areas with unidirectional fractures,in order to especially ensure the wellbore integrity;and(iv)the proportion of ceramic proppant should be increased for both development effects and economic benefits.The research results provide a guidance for subsequent platform deployment and production,thereby facilitating the large-scale and beneficial development of deep shale gas.关键词
深层页岩气/适应性评价/高产井模式/开发对策/储层改造Key words
Deep shale gas/Adaptability evaluation/High-production well model/Development strategy/Reservoir stimulation引用本文复制引用
胡航,陈智勇,张杰,杨立成,付钟臻,常思远,区舫,邵莎睿,郑天力..川南深层页岩气高产井模式探索[J].天然气勘探与开发,2025,48(2):81-91,11.基金项目
中国石油天然气集团有限公司重大现场试验项目(编号:2023ZZ21). （编号:2023ZZ21）
