底水气藏动态水锥临界产量计算方法  

Calculation method of critical production of dynamic water cone in bottom-water gas reservoir

作　　者：周小涪 鲁瑞彬 林怡菲 董文生 聂澜曦 ZHOU Xiaofu;LU Ruibin;LIN Yifei;DONG Wensheng;NIE Lanxi(Zhanjiang Branch of CNOOC(China)Co.,Ltd.,Zhanjiang Guangdong 524057,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《石油化工应用》2024年第1期5-9,28,共6页Petrochemical Industry Application

基　　金：中海油综合科研项目“南海西部油田上产2000万方关键技术研究”(CNOOC-KJ135ZDXM38ZJ02ZJ)。

摘　　要：为提高底水气藏开发效果,防止底水过快锥进造成气井水淹停喷,改进目前水锥临界产量计算方法的局限性,本文首次建立了考虑地质油藏特征及计算参数随生产时间变化的动态水锥临界产量等效数值法,通过关键参数选取与适用性分析论证了该方法相比解析公式有更广泛的适用性并科学论证了强底水气藏初期合理采气速度应低于5%。通过实例应用,验证了动态水锥临界产量计算方法的准确性,将气井产量控制在动态水锥临界产量之下可以有效提高气藏开发效果。In order to improve the development effect of bottom-water gas reservoir,prevent bottom-water from coning too fast and causing watered-out and stopped-flow of gas well,and improve the limitations of the current calculation method of critical water cone production.This paper first established the equivalent numerical method of dynamic water cone critical production considering the characteristics of geological reservoir and the change of calculation parameters with production time.Through the selection of key parameters and applicability analysis,this method is proved to be more widely applicable than the analytical method,and the reasonable gas recovery rate should be lower than 5%in the initial stage of strong bottom water gas reservoir.Through practical application,the accuracy of the calculation method for critical production of dynamic water cone is verified,and controlling the gas well production under the dynamic water cone critical production can effectively improve the development effect of gas reservoir.

关 键 词：底水锥进 采气速度 临界产量 产能计算 数值模拟 提高采收率 

分 类 号：TE328[石油与天然气工程—油气田开发工程]