南海高温高压凝析气藏凝析水产出机理及产量预测方法  

Condensate Water Output Mechanism and Production Prediction Method of HTHP Condensate Gas Reservoir in South China Sea

作　　者：熊钰[1] 熊锋 冯棚鑫 雷婷婷 王羚鸿 Xiong Yu;Xiong Feng;Feng Pengxin;Lei Tingting;Wang Linghong(Southwest Petroleum University,Chengdu,Sichuan 610500,China)

机构地区：[1]西南石油大学,四川成都610500

出　　处：《特种油气藏》2024年第3期116-122,共7页Special Oil & Gas Reservoirs

基　　金：四川省应用基础研究项目“致密气藏储层无固相残留深度干化技术基础研究”(2019YJ0424)。

摘　　要：针对南海高温高压凝析气藏中凝析水产出量上升的问题,以东方气田为研究对象,采用地层水蒸发实验方法,分别在地层条件下的PVT筒和长岩心中进行水气比测试,并提出了高温高压凝析气藏凝析水产量计算方法,预测东方气田凝析水产出程度。研究表明:高温高压凝析气藏中的流体受多孔介质微小孔径以及临界性质偏移的影响,饱和蒸气压发生变化,导致凝析水产出大幅度增加。考虑水、气相间传质的数值模拟方法可以准确预测高温高压凝析气藏中凝析水产出变化。对东方气田的日产水进行模拟,设置井底流压限制为1.5 MPa,预测时间为5 a,历史产水量拟合精度大于90%,能够很好地模拟凝析水产出情况。研究成果对高温高压凝析气藏制订合理开发方案,改善油藏开发效果具有重要指导意义。To address the issues of condensate water output rising in high temperature and high pressure(referred to as the HPHT)condensate gas reservoirs in the South China Sea,Dongfang Gas Field is taken as the research object.By using the method of formation water evaporation experiment,water/gas ratio tests were conducted in PVT cells and long cores under formation conditions,and the calculation method for condensate water output in HPHT condensate gas reservoirs was proposed to predict the output rate of condensate water in Dongfang Gas Field.The research indicates that the fluid in HPHT condensate gas reservoir is affected by the small pore size of the porous medium and the shifting of critical properties,the saturated vapor pressure of which is altered,resulting in a significant increase in the production of condensate water.The numerical simulation method considering the interphase mass transfer between water and gas can be accurately predicted the variation of the condensate water output in HPHT condensate gas reservoir.Daily water production of Dongfang Gas Field was simulated with the bottom hole flowing pressurelimit of 1.5 MPa and the prediction time of 5 a.The accuracy of history in water output was over 90%,the condensate water output can be clearly predicted by the method.This study is of guiding significance for formulating a reasonable development plan and improving the development effect in HTHP condensate gas reservoirs.

关 键 词：高温高压凝析气藏 凝析水 数值模拟 水气比 相间传质 东方气田 

分 类 号：TE349[石油与天然气工程—油气田开发工程]