摘要：With the increase in demand, deep and ultra-deep gas formations have been gradually explored and developed. As increasing the depth, the temperature and pressure were enhanced accordingly. Hydraulic fracturing is the main method to ensure a tight gas formation acquires high productivity. The fracture conductivity (FC) is a significant parameter to evaluate the flow capacity of fractures in a hydraulic fracturing design. FC was barely studied in the high temperature and high pressure tight gas formation. This study conducted the problem with Keshen formation in the Tarim basin in China. To evaluate FC in deep and high-temperature tight gas formations, we studied the impact of several crucial parameters, which are temperature, effective closure pressure, closure time, proppant type, proppant size, fracturing fluid, fracture roughness, and shear slip. Besides, we also considered the effect of pump proppant methods, static and dynamic pumping proppant on the fracture. Results showed that factors all had negative effects on the FC including higher temperature, higher effective closure pressure, smaller size proppant, lower proppant concentration, fracturing fluid addition, and increased closure time. Rough fracture surface and shear slip had a positive effect at the lower effective closure pressure. Moreover, we also found dynamic pumping proppant was more easily to form channel fracturing. The FC of the dynamic method was less than the static method when the effective closure pressure was larger than 50 MPa. This study provides a new approach to assess the FC in the high-temperature and high-pressure tight gas formation. Additionally, the mechanism of enhancing FC and production has been revealed through several key factors. This work facilitates engineers to optimize the hydraulic fracturing design and enhance the production of tight formations in the world.(c) 2022 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.

关键字：Hydraulic fracturing; Unconventional reservoir; Shale gas formation; Tight sandstone formation; Low permeability formation

ISSN号：1342-937X

卷、期、页：卷: 107页: 49-58

发表日期：2022-07-01

影响因子：6.051300

期刊分区（SCI为中科院分区）：一区

收录情况：SCIE（科学引文索引网络版）,地学领域高质量科技期刊分级目录（国外T1）

发表期刊名称：GONDWANA RESEARCH

通讯作者：朱丽颖,项荟竹

第一作者：梁星原,周福建,韩国庆,梁天博

论文类型：期刊论文

论文概要：梁星原,周福建,韩国庆,朱丽颖,项荟竹,梁天博，Experimental study on fracture conductivity in high temperature and high pressure tight gas formation: A case of Tarim basin in China，GONDWANA RESEARCH，2022，卷: 107页: 49-58

论文题目：Experimental study on fracture conductivity in high temperature and high pressure tight gas formation: A case of Tarim basin in China