临兴区块“一点法”产能方程  

Deliverability equation with“one-point method”for Linxing block

作　　者：刘世界 蔡振华 丁万贵 董建宏 杨宇光 刘成桢 LIU Shijie;CAI Zhenhua;DING Wangui;DONG Jianhong;YANG Yuguang;LIU Chengzhen(Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China;China United Coalbed Methane Co.Ltd.,Beijing 100011,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452 [2]中联煤层气有限责任公司,北京100011

出　　处：《油气井测试》2020年第5期74-78,共5页Well Testing

基　　金：中国海洋石油总公司重大科研项目“致密砂岩气产能指数及预测方法研究”(CNOOC-KJ 135KJXM NFGJ2016-05)。

摘　　要：临兴区块产能测试资料缺乏,难以获得较为准确的“一点法”产能方程。采用不稳定动态分析方法拟合气井生产动态数据,校正储层渗透率、表皮系数和裂缝长度等参数,建立气井产量—压力计算模型。通过该模型,模拟修正等时试井过程,获得气井无阻流量、二项式产能方程系数A、B及对应的经验系数α。该方法应用于临兴区块13口井,利用生产动态资料计算α系数平均值为0.92,得到本区块压裂气井“一点法”产能方程。计算结果与实际相比,误差为4.0%,符合临兴区块地质气藏特征。Since it lacks productivity testing data in Linxing Block,it is difficult to obtain an accurate deliverability equation with one-point method.Through fitting dynamic production data of gas wells with transient dynamic analysis method,the parameters,such as reservoir permeability,skin coefficient and fracture length,are corrected,and the production-pressure calculation model of gas wells is established.The process of modified isochronal test is simulated and corrected with this method to obtain the open-flow potential of gas wells as well as the coefficients A and B of the binomial deliverability equation and the corresponding empirical coefficientα.This method was applied to 13 wells in Linxing Block.The average value ofαcoefficient was calculated to be 0.92 by using dynamic production data,and the deliverability equation of fractured gas wells with one-point method in this area was obtained.Compared with the actual production data,the error of the calculation result is 4.0%,which is consistent with the geological characteristics of the gas reservoirs in the Linxing Block.

关 键 词：临兴区块 产能方程 修正等时试井 无阻流量 一点法 生产动态 

分 类 号：TE353[石油与天然气工程—油气田开发工程]