%0 Journal Article
%T A Productivity Prediction Equation Considering Rock PermeabilityStress-Sensitivity in Low-Permeability Gas Reservoirs<br>考虑渗透率应力敏感的低渗气藏产能预测公式
%A Natural Gas
%A <br>胥洪俊
%A 范明国
%A 康征
%A 常志强
%A 张绍俊
%J 天然气地球科学
%D 2008
%I 
%X Pore pressure decreases, effective stress increases, and permeability declines due to matrix and pore compression as gas produces in low-permeability gas reservoirs. This affects the deliverability of lowpermeability gas reservoirs. Based on Darcy flow law and the universal cognition that the rock permeability varies with the effective stress exponentially, this paper presents a new equation considering rock permeability stress-sensitivity for estimating the productivity in low-permeability gas reservoirs. A ease calculation with this new equation shows that considering permeability stress-sensitivity in the prediction is necessary, especially for the high stress-sensitive low-permeability gas reservoirs, and this will provide necessary reference to determining reasonable producing pressure drop and producing rate.
%K Low-permeability gas reservoir
%K Stress sensitivity
%K Permeability
%K Productivity prediction<br>低渗气藏
%K 应力敏感
%K 渗透率
%K 产能预测
%K 岩石渗透率
%K 应力敏感
%K 气藏产能
%K 预测公式
%K Permeability
%K Rock
%K Prediction
%K Equation
%K 渗流理论
%K 开采速度
%K 生产压差
%K 严重
%K 伤害
%K 测时
%K 计算分析
%K 产能公式
%K 稳态
%K 气井
%K 普遍认识
%K 指数关系
%K 应力变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=E8CFCA71B77A2FF3&jid=ACDC74B90F609E2435847898490F3647&aid=52DCDF033C42DC5B8E9B89DCD380D0F2&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=CA4FD0336C81A37A&sid=769BD58726D66E7D&eid=2922B27A3177030F&journal_id=1672-1926&journal_name=天然气地球科学&referenced_num=0&reference_num=8