非线性渗流低渗气藏压裂井的产能方程熊健郭平（西南石油大学油气.DOC

非线性渗流低渗气藏压裂井的产能方程 熊健 郭平 （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） 摘要：大量研究表明，气体渗流特征启动压力梯度、滑脱效应、应力等因素Analysis on the productivity equation of a fractured well in low-permeability gas reservoirs with non-linear seepage XIONG Jian GUO Ping （State Key Laboratory Of Oil And Gas Reservoir Geology and Exploitation, Southwest Petroleum, Southwest Petroleum Universityhina）A lot of results indicate that the main factors affecting percolation features of gas flow include start-up pressure gradient, slippage effect, stress sensitivity.In view of the characteristic of low permeability gas reservoir, based on elliptical flow mode, based on the steady seepage theory, creating a new pseudo-pressure form, the productivity prediction model was established for the finite conductivity vertical fracture wells. The result shows indicate that the gas well productivity decline is caused by start-up pressure gradient and stress sensitivity and high speed non-Darcy flow effect, and along with start-up pressure gradient and deformation coefficient of permeability enlargement, the gas well production continues to decline. While the slippage effect lead to increases in gas well production, and along with slippage factor enlargement, the gas well production continues to increase. In the fracture design of the low-permeability gas reservoirs, increasing the crack length is more important than increasing the fracture flow capacity, and under a certain crack length, there is an optimum fracture conductivity. The productivity prediction equation is reliability, showed by practical calculation. Key Word: low-permeability gas reservoirs; elliptical flow; start-up pressure gradient; slippage effect; stress sensitivity; vertical fracture wells; productivity equation 作者简介：熊健（1986-），男，现硕士研究生，从事油气田开发理论及油气藏工程的研究。地址：四川成都市新都区西南石油大学硕09级1班（610500）；电话；Email： 身份证基金项目：国家重大科技项目（编号：2008ZX005056-02-02-03） 0 前言 大量室内实验结果表明，低渗透气藏中气体渗流时不仅具有启动压力梯度 [1-2]，而且存在滑脱现象[3-4]，同时，还存在应力敏感现象[5-6]。另一方面，