异常高压气藏异常产能测试资料处理方法探讨  

Method Discussed about Abnormal High Pressure Gas Reservoir Abnormal Capacity Test Data Processing

作　　者：劳业春 李浩 张辉 李华 

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：《油气井测试》2013年第5期25-29,76,共5页Well Testing

摘　　要：莺歌海盆地DFX-1井的稳定产能测试资料出现二项式产能方程回归曲线斜率为负,指数式产能方程的指数大于1的异常情况,无法计算气井无阻流量。针对表皮效应随流量增大而减弱的实际情况,以及高温高压气井气体的高速非达西流动效应,找出出现异常情况的原因:流量变化引起的表皮系数的增大幅度小于由污染造成的表皮系数的减小程度,使得实测流动压力失真;并推算二开流动段真实表皮系数以及由于高速非达西流动效应引起的流量表皮系数,考虑它们的共同存在所引起的附加压降,再采用拟压力回归,得到正常的二项式产能方程,由此计算出合理的异常高压气井无阻流量。为高压气藏产能测试资料出现异常时资料处理提供了有益的借鉴。The stability of the Yinggehai basin DFX-1 well deliverability test data in regression curve slope is negative binomial productivity equation and exponential production equation of index greater than 1 anomalies,unable to calculate the gas well open-flow capacity.For skin effect weakened with the increase of traffic and the actual situation,and high speed of the high temperature and high pressure gaswell non-Darcy flow effect,find out the cause of the abnormal situation:flow changes of skin factor is less than the increase of amplitude caused by the pollution degree of the decrease of the skin factor,makes the distortion of the measured flow stress;And calculate the open flow section of the true skin factor and due to the high speed non-Darcy flow effect caused by flow skin factor,considering their common existence caused by the pressure drop,and then USES the pseudo pressure regression,normal binomial productivity equation is obtained,thus calculate the reasonable open flow potential of abnormal high pressure gaswell.Abnormal high pressure gas reservoir capacity testdata fordata processing provides the beneficial reference.

关 键 词：异常高压气藏 无阻流量 表皮系数 流量变表皮 

分 类 号：TE33[石油与天然气工程—油气田开发工程]