Characteristic Parameter Analysis of Low Velocity Non-Darcy Flow of Gas
作者
胡 勇1
朱 斌1
李 宁1
单位
( 1 西南油气田分公司勘探开发研究院, 四川成都610051;
2 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)
Organization
Research Institute of Exploration and Deve lopment, Southw est Oil and Gas F ie ld Company, CNPC, Chengdu 610051, China
摘要
低渗透气藏气体渗流特征参数的研究是合理开发低渗透气藏的基础和出发点,
而目前对于低渗透气藏气体渗流特征参数的研究还只是停留在定性分析的水平上, 还没有形
成一整套建立在理论分析之上、能够完整描述气体渗流规律的特征参数数学模型。文中将理
论分析和数学推导相结合, 建立了包括“滑脱动力”、“启动压差”、“综合渗流速度”及“ 临界压
力”和“临界压力”、“平方梯度”在内的能够完整描述气体渗流特征规律的数学模型。论文的研
究将有利于认识低渗透气藏的渗流规律, 为低渗透气藏的合理开发提供理论依据。
Abstract
A s the propo rtion o f low permeability gas reservo ir in the explored gas reserves increases gradua lly, the dev elopment o f low pe rm eab ility gas reservo ir attracts mo re attention. The confirm ation o f gas seepage character istic param eter in low perm eab ility gas reservo ir is the groundwork fo r the developm ent of low pe rm eab ility gas reservo ir, but we are still stay on the qua litative ana lysis stage and have not deve lop a set o f character istic param ete rm athem atica l model wh ich can descr ibe the gas seepage law integ ra lly in low perm eab ility gasreservo ir. The paper com bined the theo re tica l ana lysis w ith the m athem atica l deduction, deve loped a se t of character istic param eter ma thema tica l m odel w hich includes slippag e dr iv ing force, start-up pressure draw down, genera l seep ing veloc ity and cr itica l pressure and critica l pressure g radien t. The study in the pape r can help us to rea lize further seepage law in the low perm eab ility reservo ir, confirm seepage mechan ism, and also prov ide a theo retical founda tion for the rationa l deve lopm ent of low perm eability gas reservoir.
关键词：
低渗透气藏;
滑脱效应;
启动压差;
临界点;
低速非达西渗流;
特征参数;
Keywords:
Low perm eab ility g as reservo ir, S lippag e effect, Start-up pressure drawdow n, C ritical po int, Low veloc ity non-Darcy flow, Cha racte ristic param e ter;
论文详情