普光高含硫气田开发特征及提高采收率对策  

Development characteristics and countermeasures for improving gas recovery in Puguang Gas Field with high sulfur content

作　　者：曾大乾 石志良[1,2] 彭鑫岭[3] 李玉丹 张睿[1,2] 游瑜春 李正华 李辉[1,2] 李童[4] ZENG Daqian;SHI Zhiliang;PENG Xinling;LI Yudan;ZHANG Rui;YOU Yuchun;LI Zhenghua;LI Hui;LI Tong(Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China;Key Laboratory of Marine Oil&Gas Reservoirs Production,SINOPEC,Beijing 102206,China;Zhongyuan Oilfield Company,SINOPEC,Puyang 457001,China;School of Earth and Space Sciences,Peking University,Beijing 100871,China)

机构地区：[1]中国石化石油勘探开发研究院,北京102206 [2]中国石化海相油气藏开发重点实验室,北京102206 [3]中国石化中原油田分公司,河南濮阳457001 [4]北京大学地球与空间科学学院,北京100871

出　　处：《断块油气田》2023年第6期879-887,共9页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金项目“海相深层油气富集机理与关键工程技术基础研究”(U19B6003);国家“万人计划”科学家工作室项目“礁滩相高含硫气藏储层精细表征及剩余气分布规律研究”(P20077kxjgz);中国石化首席科学家工作室项目“普光气田剩余气分布及提高采收率技术”(P23198)。

摘　　要：普光气田是我国最大的碳酸盐岩高含硫气田,具有埋深大、储层非均质性强、边底水活跃、高含H2S及CO_(2)等特点。气田自2005年投入开发,目前逐渐步入稳产末期,面临进一步延长稳产期、提高采收率等挑战。为此,文中系统梳理普光气田不同开发阶段的关键开发指标变化规律,建立了普光礁滩相储层剩余气分布模式,提出了气藏提高采收率对策。研究结果表明:1)普光气田开发阶段分为建产阶段、稳产阶段和调整阶段,期间通过持续跟踪研究、及时优化,使得气田稳产期延长3 a,实现了长期高产稳产;2)普光气田水侵经历快速见水、限产波动、均衡见水及缓慢见水等4个阶段,硫沉积呈现从地面流程向井口、再向井筒深部扩展的趋势,受地层压降、水侵、硫沉积及措施等综合影响,气田产能较初期下降40.63%;3)普光气田剩余气类型分为2大类5小类,其中,井网未控制型分为断层遮挡和独立礁体型,井网控制型分为纯气区动用不充分、水侵区致密层遮挡和水封气型;4)提出了普光高含硫气田提高采收率对策,即通过不同类型剩余气针对性挖潜、井筒-储层硫沉积综合治理、全生命周期控水、整体与分区相结合增压开采等,进一步改善气田开发效果,提高采收率,延长稳产期。文中研究结果将为进一步实现气田长期高效开发提供技术支撑。Puguang Gas Field is the largest carbonate gas field with high sulfur content in China,characterized by large burial depth,strong reservoir heterogeneity,active edge-bottom water,high content of hydrogen sulfide and carbon dioxide.The gas field has been under development since 2005 and is gradually entering the final stage of stable production,facing challenges such as further extending the stable production period and improving gas recovery.Therefore,this paper systematically reviews the change law in key development indicators of Puguang Gas Field at different development stages,establishes a distribution pattern of residual gas in Puguang reef and shoal facies reservoirs,and proposes strategies for improving gas reservoir recovery.The research results indicate that:(1)The development of Puguang Gas Field is divided into construction stage,stable production stage,and adjustment stage.During this period, continuous tracking research and timely optimization have extended the stable production period of the gas field by 3 years, achieving long-term high and stable production;(2) The water invasion in the Puguang gas field has undergone four processes: rapid water breakthrough, limited production fluctuation, balanced water breakthrough, and slow water breakthrough. The sulfur deposition shows a trend of expanding from the ground process to the wellhead and then to the deep part of the wellbore. The productivity in the gas field is reduced by 40.63% compared to that in initial stage due to the combined influence of formation pressure drop, water invasion, sulfur deposition and measures;(3) The remaining gas types in Puguang Gas Field can be divided into 2 types and 5 distribution modes. Among them, the uncontrolled well pattern type can be divided into fault blocking and independent reef body, while the controlled well pattern type can be divided into pure gas area with insufficient utilization, tight layer blocking in water invasion area, and water sealed gas;(4) A strategy for improving the recovery efficiency in

关 键 词：高含硫气田 剩余气定量表征 水侵规律 硫沉积规律 产能及压力变化规律 增压开采 提高采收率 

分 类 号：TE377[石油与天然气工程—油气田开发工程]