克拉2气田压力动态监测方法

Method for pressure dynamic testing of Kela 2 gas field

克拉2气田是"西气东输"的主力气田,由于该气田属于异常高压气田,为规避风险,不能将压力计下入产层中部进行测试。为了监测克拉2气田的生产动态,通过在克拉2气田引入高精度电子压力计进行井口测试,利用平均温度和平均压力法将井口测试参数折算至产层中深参数,进而进行压力恢复试井解释、产能试井解释和井口气体漏失监测。研究结果表明,该方法能适应克拉2气田异常高压环境,利用测试结果及其解释可以进行产能计算,为气田稳产提供产能评价;对高压高产气井进行漏气监测,能够检测出漏气的具体位置,提高了克拉2气田的动态监测水平。

Kela 2 gas field,as abnormal overpressure gas field,is the main gas field of west-east gas transmission.For avoiding risk,test can't be done by putting manometer in the middle of production layer.Aim at monitoring production performance of Kela 2 gas field,well head test is done by using high precision electronic manometer in the gas field.Well testing interpretation of pressure recovery,well testing interpretation of productivity and monitoring of wellhead gas leaking out are done by average temperature and pressure method that converts parameter of wellhead test to deep medium layer.It shows that,the method adapts to abnormal overpressure gas field environment of Kela 2 gas field.Productivity calculation can be done by testing results and interpretation,which provides productivity evaluation for gas field stability.Concrete position of gas leaking can be detected by monitoring for high temperature and high yield gas well,which improves dynamic monitoring level for Kela 2 gas field.