正交裂缝网络单相流动试验研究  

Experimental Study on Single-Phase Flow in Orthogonal Fracture Network

作　　者：卢占国[1] 姚军[1] 王殿生[2] 李立峰[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266555 [2]中国石油大学(华东)物理科学与技术学院,山东东营257061

出　　处：《石油钻探技术》2010年第3期92-94,共3页Petroleum Drilling Techniques

基　　金：国家重点基础研究发展计划("973"计划)项目"碳酸盐岩缝洞型油藏流体流动机理研究"(编号:2006CB202400);国家科技重大专项专题项目"缝洞型碳酸盐岩油藏提高开发效果技术研究"(编号:2008ZX05014-003)资助

摘　　要：为了分析正交裂缝网络模型中单相渗流规律和模型结构对渗透率的影响,利用大理石和不锈钢垫片组建了不同结构的正交裂缝网络模型,并在自行研制的物理模拟试验装置上对这些模型进行了一系列单相流动试验。结果表明:低渗流速度下裂缝网络模型中的渗流服从线性渗流规律,随着渗流速度的不断增大,渗流曲线向压力梯度轴弯曲,呈现出非线性渗流特征;平行于流动方向的裂缝数越多,模型渗透率越大。采用达西定律和Forch-heimer方程相结合的方法,得出了线性渗流向非线性渗流转换的临界速度公式,裂缝网络模型中垂直于渗流方向的裂缝数越多,临界速度越大。In order to investigate fluid flow in orthogonal fracture network and the impact of structure on permeability,fracture network models with different structure were made using marble and stainless steel filling piece.A suite of single-phase flow experiments were conducted on fracture network models using special physical simulation installment.The study shows that fluid flow is Darcy flow when velocity is low,while fluid flow curves bend to axis of pressure gradient with the increase of the velocity and shows non-linear flow.Permeability is increasing with the increase of fractures.Finally,the critical velocity equation is derived through combination of Darcy law and Forchheimer equation.The results show that critical velocity is higher with the increase of fractures in orthogonal fracture model.

关 键 词：裂缝 渗透率 临界速度 物理模拟 物理模型 实验室试验 

分 类 号：TE311[石油与天然气工程—油气田开发工程]