川西须二气藏产水气井合理配产方案探讨  

Discussion on reasonable production allocation scheme of water producing gas wells in T3X2 gas reservoir in western Sichuan

作　　者：黄仕林[1] 邓美洲[1] 毕有益[1] 詹泽东 冯英[1] HUANG Shilin;DENG Meizhou;BI Youyi;ZHAN Zedong;FENG Ying(Exploration and Development Research Institute,Southwest Oil and Gas Field Company,SINOPEC,Chengdu 610000,China)

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《断块油气田》2024年第4期661-668,共8页Fault-Block Oil & Gas Field

基　　金：中石化科技项目“川西须二气藏开发潜力评价及有利目标优选”(YTBXD-QTKF-2023-001-001);中国石化生产科研项目“川西须二气藏动态特征研究”(34450004-22-ZC0613-0020)。

摘　　要：川西须二气藏储层致密,气井普遍产水,且断缝体规模和水体强度差异大,渗流机理复杂,使得单一产能模型和配产方法适用性差。综合因素导致气井合理配产方案不明确,从而制约了气藏的规模生产和效益开发。文中建立了考虑启动压力梯度、应力敏感等影响的气井气水两相产能评价模型,结合采气指示曲线法、动态分析法、无阻流量法及数学统计法,分别探讨了不同断缝体规模、不同水体强度及综合考虑2种因素影响的气井合理配产方案,须二气藏开发实践证实了其有效性和可靠性。此外,气井配产量与断缝体规模和水体强度的相关性明显,整体表现为裂缝越发育,配产量越高,配产比越低;水体强度越高,配产量越低,配产比也越小。该研究对川西须二气藏气井的合理工作制度制定与气井稳定生产具有较大的实际价值。The T3X2 gas reservoir of western Sichuan Basin is tight,gas wells generally produce water,there are large differences in fault-fracture body scale and water body strength,and the seepage mechanism is complex,which make the applicability of single productivity model and production allocation method poor.Comprehensive reasons lead to the unclear reasonable production allocation scheme of gas wells,which restricts the scale production and benefit development of the gas reservoir.This study established a gas-water two-phase productivity evaluation model for gas wells considering the influence of start-up pressure gradient and stress sensitivity.Then,combined with the gas production indication curve method,dynamic analysis method,open flow method and mathematical statistics method,the rational production allocation scheme of gas wells under the influence of different fault-fracture body scale,different water body strengths and comprehensive consideration of two factors is established,and the development practice of Xu 2 gas reservoir has proved its effectiveness and reliability.In addition,the production allocation of gas wells has a significant relationship with the scale of fault-fracture body and the strength of water body.The overall performance is that the more developed the fracture,the higher the production allocation,but the lower the production allocation ratio,while the higher the water body strength,the lower the production allocation,and the smaller the production allocation ratio.The research results provide practical value for the formulation of reasonable working system of gas wells in T3X2 gas reservoirs in western Sichuan.

关 键 词：断缝体规模 水体强度 产能 合理配产 川西须二气藏 

分 类 号：TE32[石油与天然气工程—油气田开发工程]