低渗碳酸盐岩气藏提高采收率技术对策  

Technical Countermeasures of Enhance Gas Recovery in Low Permeability Carbonate Gas Reservoir

作　　者：谢姗[1] 伍勇[1] 张建国[1] 焦扬[1] 何磊[1] XIE Shan;WU Yong;ZHANG Jian-guo;JIAO Yang;HE Lei(Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina,National Engineering Laboratory for Low-permeability Petroleum Exploration and Development,Xi an 710021,China)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,低渗透油气田勘探开发国家工程实验室,西安710021

出　　处：《科学技术与工程》2020年第6期2231-2236,共6页Science Technology and Engineering

基　　金：中国石油股份公司重大专项(2016E-0509)。

摘　　要：系统的提高采收率技术对策是改善低渗碳酸盐岩气藏进入开发中后期效果的重要技术手段。针对该类气藏进入开发中后期地质、生产动态以及开发方式上相对于早期的变化,围绕气田挖潜与提高采收率,梳理了该类气藏在面临侵蚀沟槽发育、储层低渗非均质性强、低压低产井多等特征时,剩余储量挖潜、提高储量动用程度和井网完整性评价中的关键技术问题。并在复杂岩溶储层描述、低渗气藏精细动态评价技术的基础上,提出以“沟槽挖潜、井网优化、增压开采、排水采气”为核心的提高采收率技术思路与对策,并将研究成果应用于鄂尔多斯盆地M气田。结果表明:M气田可新增动用储量220.3×108 m3,增产气量303.4×108 m3,提高气田采收率6.8%。研究结果对国内同类气藏的开发与实践具有指导意义。As low permeability carbonate gas reservoir enters the middle-later stages,systematic technical measures to enhance recovery are important for improving its development effect.Due to difference in geology,production performance and development mode of this type of gas reservoir in the middle-later stages of development compared with it in the early stage,critical technical challenges,such as the tapping potential of remaining reserves,improving the recovery of gas filed and well pattern integrity evaluation were proposed which were facing to characteristics of erosion trench development,low permeability,strong heterogeneity,low pressure and low production wells.Furthermore,on the basis of existing complex Karst reservoir description and fine low permeability gas reservoir dynamic evaluation technology,technical ideas and solution were also proposed targeted at middle-later stages of low permeability carbonate gas reservoir,such as eroded groove tapping potential,well pattern optimization,supercharging development and drainage gas recovery.By applying above key technologies in M gas field in Ordos Basin,reserves can be increased by 220.3×108 m 3,gas production by 303.4×108 m 3 and gas recovery by 6.8%.The research results have guiding significance for the development and practice of similar gas reservoirs in China.

关 键 词：低渗碳酸盐岩 提高采收率 侵蚀沟槽 井网优化 增压开采 排水采气 

分 类 号：TE377[石油与天然气工程—油气田开发工程]