低渗透气藏气水两相流井产能分析方法研究

doi:10.3969/j.issn.1673-8926.2012.06.022

岩性油气藏 ›› 2012, Vol. 24 ›› Issue (6): 121–124.doi: 10.3969/j.issn.1673-8926.2012.06.022

低渗透气藏气水两相流井产能分析方法研究

孙恩慧¹，李晓平¹，王伟东²

1．西南石油大学油气藏地质及开发工程国家重点实验室，四川成都610500； 2．西南石油大学资源与环境学院，四川成都610500

出版日期:2012-12-20 发布日期:2012-12-20
第一作者:孙恩慧（1988-），男，西南石油大学在读硕士研究生，研究方向为油气藏工程及渗流理论。地址：（610500）四川省成都市新都区西南石油大学硕士2010 级。E-mail：enhuisun0321@163.com
基金资助:
国家自然科学基金项目“油气藏渗流力学”（编号：51125019）资助

Productivity analysis method of water and gas two-phase flow well in low permeability gas reservoirs

SUN Enhui¹， LI Xiaoping¹， WANG Weidong²

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China； 2. College of Resources and Environment， Southwest Petroleum University，Chengdu 610500， China

Online:2012-12-20 Published:2012-12-20

摘要/Abstract

摘要：

对于存在边水、底水及层间水的低渗透气藏，当气井产水后，出现了气水两相流动。气井产能的合理计算关系到各项开发指标的确定，有利于整个气田的高效开发。以质量守恒原理为基础，通过建立气水两相同时流动的运动方程，在定义气水两相拟压力函数和气水两相拟启动压力梯度之后，推导出考虑启动压力梯度和地层损害影响的低渗透气藏气水两相流井的三项式产能方程，并在此基础上阐明了该方程的求解方法。通过实际应用，得到了受启动压力梯度和水气质量比影响的低渗透气藏气水两相流井的流入动态关系曲线。研究表明，随启动压力梯度和水气质量比的增大，均导致气井无阻流量减小。该项研究为存在边水、底水及层间水的低渗透气藏的产能及动态分析提供了一定的理论基础。

关键词: 沉积微相；沉积演化；葡萄花油层；榆树林&mdash, 肇州地区；松辽盆地

Abstract:

During the well produces in lowpermeability gas reservoir, it appears the gas and water two-phase flowdue to the existence of edge water, bottom water and interlayer water. The reasonable productivity is associated with kinds of development indexes, and it is helpful for the effective development of gas field. Based on the principle of mass conservation, this paper defined pseudopressure function and threshold pressure gradient of two-phase flowof both gas and water, and deduced trinomial productivity equation of gas and water two-phase flowin lowpermeability gas reservoirs in considering threshold pressure gradient and formation damage effects. This paper expounded the method of calculating the trinomial deliverability equation. Through the analysis of actual case, the relation curves of the well that gas and water
two-phase flowunder the influence of threshold pressure gradient and the water/gas quality ratio in low-permeability gas reservoirs was obtained. The research shows that with the increase of threshold pressure gradient and water/gas quality ratio, the AOF becomes small. So it provides a theory basis for gas and water two-phase flow well productivity anddynamic analysis of the well in the existence of edge water, bottomwater and interlayer water in low-permeability gas reservoirs.

Key words: sedimentary microfacies, sedimentary evolution, Putaohua reservoir, Yushulin-Zhaozhou area, Songliao Basin

孙恩慧，李晓平，王伟东. 低渗透气藏气水两相流井产能分析方法研究[J]. 岩性油气藏, 2012, 24(6): 121–124.

SUN Enhui，LI Xiaoping，WANG Weidong. Productivity analysis method of water and gas two-phase flow well in low permeability gas reservoirs[J]. Lithologic Reservoirs, 2012, 24(6): 121–124.

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低渗透气藏气水两相流井产能分析方法研究

Productivity analysis method of water and gas two-phase flow well in low permeability gas reservoirs

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