单位压降采气量法及其在气田开发中的应用  

Unit Pressure Drop Method for Gas Production and Application to Gas Field Development

作　　者：颜泽江[1] 戚涛[2] 周楠[1] 廖伟[1] 杜果 张刚庆[1] 

机构地区：[1]中国石油新疆油田分公司采气一厂,新疆克拉玛依834000 [2]西南石油大学石油与天然气工程学院,成都610500

出　　处：《新疆石油地质》2015年第3期330-333,共4页Xinjiang Petroleum Geology

摘　　要：为了更好地认识气藏,发现开发过程中的问题,根据气田的开发现状制定合理的生产制度,提出了单位压降采气量法。基于物质平衡原理,建立定容、异常高压凝析气藏的物质平衡方程,进一步推导单位压降采气量的表达式。单位压降采气量随压力的降低表现出先加后降的现象,这主要与压力波的传播以及偏差因子有关;通过实际曲线与理论曲线的对比,可判定气藏是否出现水侵等开发问题。该方法计算简便,具有较强的适用性。In order to understand gas reservoirs,find out the problems during gas field development and formulate the reasonable workingsystem,the unit pressure drop method for gas production was proposed.Based on the principle of molar weight conservation,the materialbalance equations of the constant volume and abnormal pressure condensate gas reservoir were established,by which the expression of unitpressure drop for gas production was derived.The case study shows that the unit pressure drop for gas production appears increasing andthen decreasing along with the pressure reducing,which is mainly related with propagation of pressure wave and deviation factor.By com-parison of the actual curves with theoretical curve,we can determine if water invasion or other problems are happened.This method is sim-ple in calculation and better in applicability.

关 键 词：单位压降采气量 凝析气藏 异常高压气藏 物质平衡原理 

分 类 号：TE37[石油与天然气工程—油气田开发工程]