Natural gas hydrate reservoir true triaxial hydraulic fracturing simulation test device and method

• Main Authors: LUAN HENGJIE, MA XIANZHUANG, LI MENG, WANG DONG, YAN PENG, JIANG YUJING, LIANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS; TESTING

The invention provides a natural gas hydrate reservoir true triaxial hydraulic fracturing simulation test device and method, belongs to the technical field of geotechnical engineering and testing, and aims to realize monitoring of a hydrate-containing sediment fracture process and a fracturing fluid flowing process. According to the device, a true triaxial hydraulic fracturing system provides a high sealing condition for a test piece, applies principal stress in three directions, and can also inject fracturing fluid to simulate a hydraulic fracturing process; a temperature control system controls test temperature and maintains the state of a hydrate during the fracturing test; a gas-liquid collecting system is used for collecting and measuring gas and water produced in the test; a neutron image pickup monitoring system monitors the contents of carbon, hydrogen and oxygen elements in the hydrate, analyzes the disordered distribution of guest molecules in a water cage, and monitors the evolution condition of th