崖城13-1气田高温低压修井液类型选择

Selection of Workover Fluid in HTLP Yacheng 13-1 Gas Field

针对高产开采10多年的崖城13—1气田出现的地层压力持续下降、单井产量持续降低、产液量和水（液）气比总体上升、气井水淹等现状，在调研了大量国内外高温低压油气藏修井液体系类型及应用情况扣国内外低密度钻井液体系研究现状以及应用情况的基础上，结合崖城13—1气田高温（气藏中部温度达176℃）低压（地层压力系数部分低至0．17）和储层非均质性强（渗透率2．2～1604mD）的特征，选择适合其储层特征的修井液类型为暂堵型修井液，为崖城13—1气田高温低压井的稳产增产改造和高效开发提供了技术保障。

There appeared such problems in Yacheng 13-1 gas field after high capacity for over 10 years： the continuous depletion of formation pressure and per well production,total ascension of liquid producing capacity and water-gas ratio and waterflooding of gas wells. Based on the view of type of large number of domestic and foreign workover fluid systems and their applications in high temperature and low pressure（HTLP） oil and gas reserviors and the research and applications of low density drilling fluid systems, combined with the reservoir characteristics of Yacheng 13-1 gas field with high temperature（the temperature in the middle of gas field was up to 176 ℃ ）, low pressure（formation pressure coefficient was as low as 0.17）and strong heterogeneity（perme- ability was 2.2-1604 mD） ,the temporary blocking workover fluid was selected. It provided technological sup- port for enhanced recovery reconstruction and efficient development.