低渗透气藏气井一点法产能预测公式

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (6): 651-653.

低渗透气藏气井一点法产能预测公式

王富平¹, 黄全华², 孙雷², 于智博¹

1.中国石油西南油气田分公司天然气经济研究所,成都 610051;
2.西南石油大学石油工程学院,成都 610500

收稿日期:2010-03-23 修回日期:2010-05-18 发布日期:2021-01-18
作者简介:王富平(1982-),男,四川广安人,硕士,石油地质,(Tel)13402841314(E-mail)wfpdream621@126.com.

A Single Point Deliverability Formula for Gas Well in Low-Permeability Gas Reservoir

WANG Fu-ping¹, HUANG Quan-hua², SUN Lei², YU Zhi-bo¹

1. Economic Institute of Natural Gas, Southwest Oil-Gas Field Company, PetroChina, Chengdu, Sichuan 610051, China;
2. Institute of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2010-03-23 Revised:2010-05-18 Published:2021-01-18

摘要/Abstract

摘要： 气井一点法产能试井操作简单方便、测试时间短,在气田产能评价中得到相当广泛的应用。但在低渗气藏应用时,计算结果常常偏差较大。针对这一问题,从一点法产能公式推导理论和低渗气藏气体渗流特征出发,基于考虑启动压力影响的产能方程推导出了适合于低渗气藏气井的一点法公式,并建立了由一点法测试资料反推气井产能系数的方法。推导显示:低渗气藏气井一点法产能计算公式与常规的一点法公式相比,式中经验参数由1 个变为了2个,并且经验参数α、δ 还与启动压力梯度大小有关。通过实例分析,证实了建立的方法是切实可行的。

关键词: 低渗透气藏, 气井, 一点法, 启动压力梯度, 产能

Abstract: In deliverability evaluation of a gas well, the single point deliverability test is widely applied to gas field with simple and easy operation as well as short test time. However, the calculation results tend to be in large deviation when it is applied to low-permeability gas reservoir. Starting from the theory which derives the single point deliverability formula and the low-permeability gas reservoir characteristics, and based on the trinomial deliverability equation considering the threshold pressure gradient, a single point deliverability formula for gas well in low-permeability gas reservoir has been deduced, and a method for calculating deliverability factors by a single point test data has been established. It is shown that compared with conventional single point formula, the number of the empirical parameter in the single point formula for low-permeability gas well has become two from one, and empirical parameters α, δ are also related with threshold pressure gradient. The case study indicates that this method presented in this paper is feasible.

Key words: low permeability, gas well, one point method, threshold pressure gradient, deliverability, productivity

中图分类号:

TE373

王富平, 黄全华, 孙雷, 于智博. 低渗透气藏气井一点法产能预测公式[J]. 新疆石油地质, 2010, 31(6): 651-653.

WANG Fu-ping, HUANG Quan-hua, SUN Lei, YU Zhi-bo. A Single Point Deliverability Formula for Gas Well in Low-Permeability Gas Reservoir[J]. Xinjiang Petroleum Geology, 2010, 31(6): 651-653.

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