2016年6月 SE
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10.3969/J.ISSN.1000-3754.2016.03.012
低渗透气藏产水气井产能评价新方法
徐模郭肖
（西南石油大学油气原地质及开发工程国家重点实验室，四川成郡610500）
June，2016 Vol. 35 No. 3
摘要：存在边水、底水及层间水的低渗透气藏开发到一定程度后会出现气水两相流的情况，由于气水两相流气藏的渗流规律不同于普通低渗透气藏，对此类气藏产能的准确评价成为合理、高效开发的关键。从矿场实际生产
，如果仍将水气质量比当作定值来分析气井产能就会得出错
情况可知，产水气井在生产时水气质量比难以稳定，
误的结论。因此，考虑不同工作制度下水气质量比不同，
考虑储层应力敏感、启动压力梯度、气体滑脱效应以
及表皮污染，基于稳定渗流理论推导出产水气井的产能公式。
通过实例计算，新公式计算的无阻流量结果与实
际产能测试结果相对误差为3.7%，说明新公式是可靠的。
且水气质量比随井底压力减小而增加，说明计算产水
。对敏感性因素分析发现，气井产气量随着滑脱因子增大而增大，
气井产量时将水气质量比设为定值并不合理。
面随着启动压力梯度以及应力敏感指数的增大而减小，启动压力梯度对气井产量影响很小，基本可以忽略。关键词：低渗透；气井；两相渗流：变水气质量比；产能评价
文章编号：1000-3754（2016）03-0064-05
中图分类号：TE375
文献标识码：A
NEWPRODUCTIVITYEVALUATINGMETHODOFTHEWATER-PRODUCINGGASWELLINLOW-PERMEABILITYGASRESERVOIRS
XUMo,GUO Xiao
(State Key Laboratory of Oil and Gas Reseroir Geology and Exploitation，
Southwest Petroleum University,Chengdu 610500,China)
Abstract: When the low-permeability gas reservoir with the edge water, bottom water or interlayered water exploi-ted to a certain extent, two-phase seepage phenomenon appears. The seepage laws in the reservoir with two-phase(gas and water) flow are alien to the common one, so the accurate productivity evaluation of this kind of the gas reservoir has become the key to the reasonable and high-efficiency development. According to the field production and operation conditions, the water-gas mass ratio is variable under the working condition of the water-producing gas well, if the mass ratio is regarded as the constant value to analyze the productivity of the gas well, wrong results will occur. Therefore, considering the water-gas mass ratio changed with different working systems, taking the stress sensitivity, start-up pressure gradient, gas slippage effect and skin contamination into consideration, the productivi-ty formula is deduced for the water-producing gas wells based on stable percolation theory. The calculation of the case study shows that the relative eror in the open-flow capacities calculated by the new formula and actual produc
收稿日期：2015-09-14
改回日期：2015-11-12
基金项目：“十二五”国家油气科技重大专项“高压水侵气田高效开发机理及高压气井压力系统监测方法”
（2011ZX05015-002）资助。
作者简介：徐模，男，1991年生，在读硕土，从事油气藏工程及渗流力学研究。
E-mail;imxuheng@163,com
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