多层断块油藏台阶水平井渗流模型研究

多层复杂断块油藏台阶式水平井开采的渗流机理和规律复杂。本文以非稳态流动数学模型为基础，建立了封闭油藏中一口穿过多个互不连通油藏的台阶式水平井与油藏耦合的渗流数学模型，并采用拉普拉斯变化、Stehfest反演以及共轭梯度法等方法进行求解，获取了不同时刻的压力分布结果和不同井段的产量分布结果。利用该模型与saphir软件计算结果进行对比，模型的可靠性强。利用该模型对某两层断块油藏进行了实例研究，在对油藏形状简化的基础上，利用两台阶水平井模型进行了模拟计算，能够准确计算出不同生产阶段的井底压力和井筒产量分布。为多层断块油藏采用台阶水平井开发的油藏工程研究和采油工程设计提供了理论依据。

Seepage model research of multi-layer fault block reservoir of horizontal steps

The seepage mechanism and law of the multilayer complex fault block reservoirs benching horizontal well drilling is complex. Based on the transient flow mathematical model, a seepage mathematical model has been established about the benching horizontal well with the reservoir coupling through the multiple non-connected reservoirs in a closed reservoirs, it is solved by Laplace transformation, Stehfest inversion and conjugate gradient methods. And the pressure distribution in different times and production distribution in different intervals are obtained. When comparing the calculation results with those of Saphir, the model is proved high reliability. A two-layer block fault reservoir has carried on the case study through the model. On the basis of the simplification of reservoir shape, and by using two benching horizontal well model simulation calculate is studied. It can accurately calculate the bottom hole pressure and the wellbore production distribution at different production stages. It provides a theoretical basis for the reservoir engineering research and production engineering design of the multilayer fault block reservoir benching horizontal well development.