Simulation experiment device for fault with multi-period alternating stress

Abstract

The invention relates to a simulation experiment device for a fault with multi-period alternating stress, and mainly solves a problem of low possibility of judging fault sealing property of an existing underground gas storage. The simulation experiment device is characterized by comprising a core preparation system, a vacuumizing assembly, a host model system, a data collection and analysis system and a pressure injection system. The device can not only test sealing property parameters of a fault sample of the storage but also realize simulation of a stress state and the like of the sample of the storage under a multi-period alternating stress condition for real-time continuous monitoring, and further can perform comprehensive evaluation on sealing conditions of the fault of the storage under the multi-period alternating stress operation condition in combination with other geological conditions (such as lithologic characters, fault fillers, fault parameters and the like) of the storage.

Description

technical field [0001] The invention relates to a simulation experiment device used by scientific research institutes in the field of oil and gas field development, in particular to a multi-period alternating stress fault simulation experiment device. Background technique [0002] The multi-cycle alternating stress will be formed in the process of multiple injection and production of underground gas storage. Under this condition, the sealability of faults will change. Fault sealability refers to the ability of faults to seal oil and gas, and the migration of faults to oil and gas. The essence of control, accumulation, preservation, and destruction is the problem of fault sealing, which is of great practical significance in the field of oil exploration and development. The failure of the fault sealing of the gas storage will lead to leakage or even failure of the gas storage. Therefore, how to determine and evaluate the upper and lower limits of injection-production pressure ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing underground gas storage fault seal is not easy to judge, the present invention provides a multi-period alternating stress fault simulation experiment device, which can not only test the seal parameters of the fault samples of the storage storage, but also can Realize real-time continuous monitoring of the strain state of the sample under the multi-period alternating stress conditions of the simulated reservoir, and can also combine other geological conditions of the reservoir (such as lithology, fault filling, fault parameters, etc.) Comprehensive evaluation of fault sealing conditions under operating conditions

Images