煤层气典型曲线产能预测方法  

Type curves for production prediction of coalbed methane wells

作　　者：徐兵祥[1] 李相方[1] 胡小虎[1,2] 胡素明[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中石化石油勘探开发研究院,北京100083

出　　处：《中国矿业大学学报》2011年第5期743-747,共5页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2009CB219606);国家科技重大专项(2009ZX05038-005)

摘　　要：为简单快速预测煤层气井产能,引入了典型曲线-无因次产量与时间的关系曲线法.通过分析兰氏压力、兰氏体积和渗透率等对典型曲线形态的影响,建立了不同兰氏压力下无因次产量与时间的关系式,提出了煤层气井典型曲线产能预测方法.运用该方法分别对韩城和沁南区块两口煤层气井进行产量预测和储量评价.结果表明:预测产量与前5年的实际产量符合率高于80%,表明该方法可供现场应用.对生产数据进行拟合得出两口井的控制储量分别为2.40×107m3和2.29×107m3,预测未来10年采出程度分别为44.3%和46.3%.The type curves were used as a simple and effective method to predict the production of coalbed methane well.Based on analyzing the effects of Langmuir pressure,Langmuir volume and permeability on the shape of type curve,the equations between the dimensionless gas-rate and time in different Langmuir pressure conditions were established,and the prediction method for production of coalbed methane well was developed.The predicting and evaluating results for two wells in Hancheng and South Qinshui region show that the coincidence rate between predicted rate and actual rate is more than 80%,which demonstrates the type curves method is applicable for field practice.The controlled reserves are 2.40×107 m3 and 2.29×107 m3 respectively,and the recoveries in the 10th year are 44.3% and 46.3%,respectively.

关 键 词：典型曲线 煤层气 产能预测 

分 类 号：TE37[石油与天然气工程—油气田开发工程]