单井生产动态拟合法求取强水驱凝析气藏动态储量  

Single well production performance fitting method for dynamic reserves of strong water-drive gas condensate reservoir

作　　者：刘建仪[1] 韩杰鹏 张广东[1] 刘洋[3] 龙强[1] 张德政 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]安东石油技术(集团)有限公司,北京100102 [3]中国石油川庆钻探工程有限公司川西钻探公司,四川成都610051 [4]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《中国海上油气》2016年第2期83-87,共5页China Offshore Oil and Gas

基　　金：国家自然科学基金"高含硫气藏井筒硫沉积机理研究(编号:51474181)"部分研究成果

摘　　要：针对压降法计算强水侵凝析气藏动态储量结果偏大,现代产量递减法则需要气井达到拟稳定流阶段时计算结果才准确等问题,提出了一种适用于强水侵凝析气藏的单井生产动态拟合新方法。该方法基于物质平衡理论、三相气井产能模型求取不同时间的地层压力,利用井筒压降模型、相态理论求取井底流压及物性参数,以测试的地层压力、产量、流压为目标函数并采用最优化方法自动拟合生产数据,从而求得单井动态储量和水侵强度。实例应用表明,本文方法与现代产量递减法(气井达到拟稳定流阶段)的计算结果相近,具有较好的准确性,而本文方法所需资料较少,适用性更强。The result of dynamic reserves evaluation with pressure-drop method for strong water-drive gas conden- sate reservoir is relatively large, and the modern production decline methods need the gas well to be in the stage of steady flow. Therefore, a production performance fitting method is proposed, in which the variation of formation pressure with time is obtained based on material balance theory and three-phase productivity model, and the bottom hole pressure and other physical parameters are calculated using the wellbore pressure-drop model and phase state theory. The objective function based on the testing formation pressure, production, flow pressure is established and the dynamic reserves and water influx of the well are obtained with the optimization method for automatic fitting of production data. Compared with the modern production decline method, this method is validated with high- ly reliable calculation results and a wide applicability with less data.

关 键 词：强水驱 凝析气藏 动态储量 物质平衡 生产动态拟合 方法评价 

分 类 号：TE33[石油与天然气工程—油气田开发工程]