Research on in-situ condition preserved coring and testing systems

• 作者: He-Ping Xie Tao Liu Ming-Zhong Gao Ling Chen Hong-Wei Zhou Yang Ju Feng Gao Xiao-Bo Peng Xiong-Jun Li Rui-Dong Peng Ya-Nan Gao Gong Li Zhi-Qiang He Ming-Qing Yang Zhi-Yu Zhao
• 来源期刊: 石油科学（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: Petroleum Engineering & Mechanics
• 页码范围: 1840-1859
• 页数: 20页
• 语种: 英文

摘要

As shallow resources are increasingly depleted,the mechanics' theory and testing technology of deep in-situ rock has become urgent.Traditional coring technologies obtain rock samples without retaining the in-situ environmental conditions,leading to distortion of the measured parameters.Herein,a coring and testing systems retaining in-situ geological conditions is presented:the coring system that obtains in-situ rock samples,and the transfer and testing system that stores and analyzes the rocks under a recon-structed environment.The ICP-Coring system mainly consists of the pressure controller,active insulated core reactor and insulation layer and sealing film.The ultimate bearing strength of 100 MPa for pressure-preservation,temperature control accuracy of 0.97％ for temperature-retained are realized.CH4 and CO permeability of the optimized sealing film are as low as 3.85 and 0.33 ppm/min.The average tensile elongation of the film is 152.4％ and the light transmittance is reduced to 0％.Additionally,the pressure and steady-state temperature accuracy for reconstructing the in-situ environment of transfer and storage system up to 1％ and ±0.2 is achieved.The error recorded of the noncontact sensor ring made of low-density polymer is less than 6％ than that of the contact test.The system can provide technical sup-port for the deep in-situ rock mechanics research,improving deep resource acquisition capabilities and further clarifying deep-earth processes.