Influence of gravel content and cement on conglomerate fracture

作     者：Zhen-Xin Zhang Hong-Kui Ge Jjian-Bo Wang Jian-Tong Liu Dun-Qing Liu Wei-Wei Teng Ying-Hao Shen 

作者机构：Unconventional Oil and Gas Technology Research InstituteChina University of Petroleum(Beijing)Beijing102249China Department of Petroleum EngineeringChina University of Petroleum(Bejing)at KaramayKaramay83400oXinjiangChina CNPC Xinjiang Oilfield CompanyKaramay834000XinjiangChina 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2023年第20卷第3期

页      面：1724-1741页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the Natural Science Youth Project of University Scientific Research Plan in Xinjiang(XJEDU2021Y053) the Talent Introduction Research Project of China University of Petroleum Beijing at Karamay(XQSQ20200056) Development of Conglomerate Reservoir Laboratory in Xinjiang(2019D04008) the Strategic Cooperation Technology Projects of CNPC and CUPB(Grant No.ZLZX2020-01) 

主　　题：Conglomerate Mechanical property Fracture characteristics Crack evolution 

摘      要：Tight reservoirs are typically developed by horizontal wells and multi-stage hydraulic *** conglomerate reservoir is one type of tight reservoirs,which is different from homogeneous rock,such as tight *** is because that the existence of gravels makes conglomerate have strong ***,it is difficult to grasp the fracture mechanism and the law of fracture propagation of conglomerate,which limits the efficient development of the conglomerate *** this paper,the fracture characteristics and factors influencing the fracturing of Mahu conglomerate were studied by uniaxial compression,acoustic emission monitoring and X-ray computed tomography(CT)scanning *** results show that the fracture characteristics of conglomerates are influenced by the gravel content and *** conglomerate in the study area is mainly divided into carbonate cemented conglomerate and clay cemented *** fracture complexity of carbonate cemented conglomerate first increases and then decreases with increasing gravel ***,for clay cemented conglomerates,the fracture complexity increases over the gravel *** crack development stress is a significant parameter in the crack assessment of *** study is useful to understand the influence of meso-fabric characteristics of conglomerates on their fracturing and crack evolution and guides the design of hydraulic fracturing.