摘要：Fracability is the ability of the reservoir to form a complex fracture network under hydraulic fracturing. In order to effectively evaluate the fracability of the deep tight sandstone gas reservoir in Changling Block, Songliao Basin of China, the velocities change with stresses, the stress-strain characteristics under uniaxial compression, combined with acoustic emission (AE) measurement experiments of the reservoir samples were conducted. Then, the experimental results of elastic parameters and the stress were used to calibrate the well logging data, and the in situ stress profiles and natural fractures development of the reservoir were systematically obtained. The research results indicate that the main controlling factors affecting the fracability of the deep tight sandstone gas reservoirs include matrix brittleness, natural fractures, compressive strength, the horizontal stress difference, and the minimum principal stress. The b-value of AE is derived from the Gutenberg formula, which can characterize the complexity of fractures. The larger the b-value, the higher the complexity of fractures. Then, a quantitative method for fracability evaluation of deep tight sandstone gas reservoirs was obtained based on the main controlling factors. The weights of each influencing factor were acquired by the correlation analysis of each influencing factor with the AE b-value. The quantitative method for fracability evaluation was then used for a vertical well and verified by the fracture-controlled production data indicating the reliability of the method. Finally, the suggestion for fracturing is put forward. It is recommended that during hydraulic fracturing, make the main fracture fully extend and communicate with as many natural fractures as possible. The natural fractures could be treated as the branching fracture of the hydraulic fracture. Then, a complex fracture network will be formed by increasing the net pressure inside the fracture.

ISSN号：1070-6631

卷、期、页：卷37期1

发表日期：2025-01-01

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：PHYSICS OF FLUIDS

参与作者：白杰,郝春城

通讯作者：吴华,张彦龙

第一作者：王小琼,葛洪魁,盛茂

论文类型：期刊论文

论文概要：吴华,王小琼,白杰,葛洪魁,郝春城,盛茂,张彦龙，Advanced fracability assessment in deep tight sandstone gas reservoirs: Methodologies and application to the Changling block, Songliao Basin，PHYSICS OF FLUIDS，2025，卷37期1

论文题目：Advanced fracability assessment in deep tight sandstone gas reservoirs: Methodologies and application to the Changling block, Songliao Basin