异常高压气藏水平井气水两相产能模型建立及应用  

Development and Application of Horizontal Well Gas-Water Two-Phase Productivity Model in Abnormal High-Pressure Gas Reservoir

作　　者：罗静 耿惠丽 邓波 曹建 邓清源 周光亮 Luo Jing;Geng Huili;Deng Bo;Cao Jian;Deng Qingyuan;Zhou Guangliang(PetroChina Southwest Oil&Gas field Company,Jiangyou,Sichuan 621741,China;CNPC,Beijing,100007,China)

机构地区：[1]中国石油西南油气田公司,四川江油621741 [2]中国石油天然气股份有限公司,北京100007

出　　处：《特种油气藏》2020年第3期125-130,共6页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05052-002-04)。

摘　　要：针对异常高压气藏水平井气水两相产能预测精度低的问题,考虑油水共采、应力敏感效应、启动压力梯度等因素影响,运用茹科夫斯基变换,针对异常高压气藏建立对应的气水两相运动方程,并定义了气水两相广义拟压力,最终推导得到异常高压气藏气水两相水平井产能模型。该模型在西南某异常高压气藏水平井产能预测中取得较好应用效果,表明新模型能较好预测异常高压气藏水平井两相产能,且气井无阻流量随水平井段长度与气体滑脱因子增大而增大,随应力敏感指数的增大而减小。该研究为异常高压气藏水平井气水两相产能预测提供了新的解决思路。In order to improve the horizontal well gas and water two-phase productivity in abnormal high-pressure gas reservoir,Zhukowski transformation was used to establish a gas-water two-phase motion equation for abnormal high pressure gas reservoir by considering oil and water co-production,stress sensitivity effect and starting pressure gradient.A generalized pseudo-pressure of gas and water two-phase was defined to derive a horizontal well gas and water two-phase productivity model for abnormal high pressure gas reservoir.This model was successfully applied in the horizontal well productivity prediction of abnormal high pressure gas reservoir in a certain block of PetroChina Southwest Oil&Gas field Company,which demonstrates a favorable adaptability of predicting the horizontal well two-phase productivity in abnormal high pressure gas reservoir.The absolute open flow rate increases with the increase of lateral length and gas slip factor and decreases with the increase of stress sensitivity factor.This research could provide a new means to the horizontal well gas and water two-phase productivity prediction in abnormal high pressure gas reservoir.

关 键 词：异常高压气藏 气水两相 水平井 气井产能 

分 类 号：TE312[石油与天然气工程—油气田开发工程]