摘要
对由基质、裂缝和溶洞组成的三重介质油藏建立了试井解释模型,采用全隐式差分格式对考虑井筒储存和表皮效应影响的情况给出了模型的数值解。对给出的试井模型与溶洞-井筒连通、缝-洞-井筒连通模型进行了压力特征比较,分析了介质间的窜流系数、弹性储能比、渗透率比及外边界对压力响应的影响。分析结果表明,该模型包含了溶洞-井筒连通和缝-洞-井筒连通模型,窜流系数λfv和λmv决定过渡段出现的时间,弹性储能比ωv和ωf影响压力导数曲线"凹陷"的深度与宽度,而渗透率比K0v则影响窜流过渡段曲线的形状,封闭边界和等压边界则导致晚期压力导数曲线的"上翘"和"下跌"。
This paper presents the model for well test interpretation of triple porosity media reservoir composed of matrix, fracture and vug, in which wellbore storage and skin effect are considered by fully implicit difference format, and related numerical solutions are given. The comparisons of this model with models for vug to wellbore connection and fracture-vug to wellbore connection are made in pressure response, including analyses of interporosity flow coefficient, storativity ratio, permeability ratio and the effect of outer boundaries on pressure response. The results show that this mode contains these two connection models, where interporosity flow coefficients （λfv and λmv） are used to determine the time of transition interval emergence; storativity ratio （ωv and ωf ） to affect the depth and width of sag-like curves of pressure derivative, permeability ratio （Kv^0） to influence the shape of interporosity flow transition curve, and sealed boundary and isopressure boundary to result in late curve ＂up＂ and ＂down＂ in pressure derivative.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2008年第2期222-226,共5页
Xinjiang Petroleum Geology
基金
国家“十五”重大科技攻关项目
塔河油田开发关键技术(2001BA605A03)资助
关键词
三重介质
试井
窜流系数
弹性储能比
triple porosity media
well test
interporosity coefficient
elastic storativity ratio
