一点法求气井产能适用范围的研究  

Applicable scope of the single-point test method for the evaluation of gas well deliverability

作　　者：孙志道[1] 胡永乐[1] 方义生[1] 胡云鹏[2] 

机构地区：[1]中国石油勘探开发研究院 [2]中国地质大学(北京)

出　　处：《天然气工业》2011年第11期63-65,124-125,共3页Natural Gas Industry

摘　　要：调查研究气井测试一点求产能经验方法产生的背景、属性和适用范围以及推广应用该方法时产生的某些偏差后认为,一点法是二项式、指数式推导的对比参数关系式,由于固定参数(Ad、n,C固定为1)来源于某些气藏多流量稳定试井数据的平均值,故属于统计学经验方法,这也使一点法求产能脱离了与产层的地质情况、流体性质和环境参数的关系,因此该方法只适用于经验数据来源的气藏或气井;由于求得的数据只是一种近似值,故只适用于不具备多流量稳定测试条件、避免大量天然气放空损失情况下,初步估算的是气井的绝对无阻流量;气藏开发和工程设计所需的数据要求准确、可靠,应在气藏试采初期用多流量试井方法取得,一点法获取的数据不能作为依据。Through an in-depth investigation,the origin,background,feature,applicable scope,and some errors caused during the application of the single-point test are discussed in detail.The single-point method originated from the binomial and exponential flow equations,and the coefficients of its constants(such as Ad,nand C,which are equal to 1)are obtained from the average Ad,n of the multiple rate flow after flow test,so the single-point test is a statistical method for empirical testing.That is why the single-point test is incoherent with geological properties of production zones,fluid properties,and environmental properties.So the gas well deliverability derived from the single-point test method is only approximate values,and this method should only be used when there are no multiple rate well testing data,which can be used to estimate the gas well deliverability in order to prevent massive gas from being vented to the air.Instead of adopting the unreliable data from the single-point test method,the gas field development and engineering design need accurate and reliable data which can be only obtained by the multi-point open flow potential test at the early period of the initial pilot field development.

关 键 词：气井 生产能力 试井 一点法 二项式 指数式 经验关系式 适应性 

分 类 号：TE328[石油与天然气工程—油气田开发工程]