摘要：Hydraulic fracturing is an effective stimulation method for the economic development of tight-gas reservoirs in which extremely low matrix permeability requires complex fracture networks. Petrophysical/mechanical experiments and XRD/SEM analyses demonstrate that volcanic sedimentary rock is characterized by developed natural fracture, strong brittleness, stress sensitivity, AE activity, weak anisotropy, and fluid sensitivity. Fracability index is often utilized as a key parameter to evaluate the ability to generate fracture networks. In this study, a new systematic experimental approach and a new mathematical model are established for the comprehensive evaluation of the fracability of tight-gas formations. These two methods integrate natural fracture, stress sensitivity, rock anisotropic nature, AE activity and crack density. The results indicate that the fracability index (FI) and the calculated crack density (CRD) are positively linearly correlated. The method is successfully applied to evaluate the fracability of the Yingtai gas field in northeast China. (C) 2015 Elsevier B.V. All rights reserved.

关键字：Tight-gas reservoir Fracability evaluation Fracture network Crack density Velocity anisotropy Stress sensitivity

ISSN号：1875-5100

卷、期、页：卷: 23 页: 239-249

发表日期：2015-03-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）,EI（工程索引）

发表期刊名称：JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING

通讯作者：汪道兵,王剑波,孟范宝,索彧

第一作者：葛洪魁,王小琼,韩善鹏

论文类型：期刊论文

论文概要：汪道兵,葛洪魁,王小琼,王剑波,孟范宝,索彧,韩善鹏，A novel experimental approach for fracability evaluation in tight-gas reservoirs，JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING，2015，卷: 23 页: 239-249

论文题目：A novel experimental approach for fracability evaluation in tight-gas reservoirs