形成复杂缝网体积（ESRV）的影响因素分析

Analysis of factors affecting the formation of Effective Stimulated Reservoir Volume（ESRV）

崔明月 刘玉章 修乃领 丁云宏 鄢雪梅 窦晶晶 付海峰

CUI Mingyue LIU Yuzhang XIU Nailing DING Yunhong YAN Xuemei DOU Jingjing FU Haifeng

中国石油勘探开发研究院廊坊分院，河北廊坊　065007

PetroChina Research Institute of Petroleum Exploration and Development-Langfang, Langfang 065007, China

基于室内真三轴水力压裂模拟实验、现场压裂实践和理论分析的方法，从储层岩石的脆性指数、水平应力差、天然裂缝的力学特征和发育程度、液体黏度和施工参数等方面分析了储层形成复杂裂缝网络的受控因素，初步建议以多因素耦合的复杂缝网体积（或有效地改造储层的体积ESRV）来表征水力压裂对储层的改造程度。复杂缝网体积，既包括了裂缝总面积与储层体积的比表面积（裂缝的密度）的作用也包括了裂缝所触及到改造体积（裂缝体积）的作用。研究表明，储层的水力压裂复杂缝网指数受到地质因素和工程因素的双重影响。

Based on the results of lab experiments on Triaxial Test System，field fracturing practice，and theory analysis，this paper systematically analyzes the factors affecting the formation of complex fracture network from the aspects of brittleness, horizontal stress difference, mechanical characteristics and development degree of natural fractures, fluid viscosity and treatment parameter etc. A new parameter complex fracture network volume（or effective stimulated reservoir volume）is suggested to evaluate the stimulating degree of the reservoir. Complex fracture network volume（ESRV）reflects both effect of specific surface area, ie, total fracture area to reservoir volume, and the effect of stimulated volume by fracturing. The research shows the extending shape of fractures in reservoir is influenced by both geological factors and engineering factors.

10.13639/j.odpt.2014.02.021