CAJ | 학술논문

对于水驱气藏，水侵可以起到维持地层压力、保持气井产量的正面作用。但当水锥突破至井底后，受气水两相渗流的影响，气相渗透率急剧降低，严重影响气井生产。如何准确预测边水推进距离，做到水侵的提早预警，对于气藏开发技术对策调整具有重要的意义。基于体积平衡原理、以边水气藏水侵圆环为研究对象，建立的边水气藏水侵预警方程能预测气藏的可能见水井及其见水时间，可实现水侵气藏的早预警、早调整；并结合产量预测、压力预测和水侵量预测模型，建立了一种新的基于水侵预警的边水气藏动态预测模型，应用于PG气田水侵气藏的见水井、见水时间和相关开发指标的动态预测，与实际生产对比表明，该模型预测结果基本吻合，能够指导气藏的水侵预警与及时调整。
대우수구기장，수침가이기도유지지층압력、보지기정산량적정면작용。단당수추돌파지정저후，수기수량상삼류적영향，기상삼투솔급극강저，엄중영향기정생산。여하준학예측변수추진거리，주도수침적제조예경，대우기장개발기술대책조정구유중요적의의。기우체적평형원리、이변수기장수침원배위연구대상，건립적변수기장수침예경방정능예측기장적가능견수정급기견수시간，가실현수침기장적조예경、조조정；병결합산량예측、압력예측화수침량예측모형，건립료일충신적기우수침예경적변수기장동태예측모형，응용우PG기전수침기장적견수정、견수시간화상관개발지표적동태예측，여실제생산대비표명，해모형예측결과기본문합，능구지도기장적수침예경여급시조정。
Water invasion can maintain the reservoir pressure and keep the production of gas wells for water-drive gas reservoir. The gas well production performance will be affected by the sharp decreasing of gas permeability when the water breaks into the well-bottom. It is very important significance for development technical adjustment to accurately predict the distance of edge water advancing and to early warn for the water invasion. Based on the principle of volume balance of water invasion circle of edge water gas reservoir,the formula of water invasion proximity warning was firstly proposed,then the prediction models of production rate,pressure and water invasion volume were considered in this article,and a new prediction model of edge-water gas reservoir production performance considering water invasion proximity warning was proposed,and a real case study on Puguang Gas Reservoir was conducted finally.