Multifunctional reaction kettle for reservoir response and sand production simulation in hydrate exploitation

Abstract

The invention discloses a multifunctional reaction kettle for reservoir response and sand production simulation in hydrate exploitation, which comprises a kettle body, an upper end cover, a lower endcover, a piston, a plug and a water-cooling jacket, wherein the kettle body is hollow for placing a test sample; the upper end cover is provided with an axial pressure injection hole, the piston is pushed to move by consolidation pressure provided by the axial pressure injection hole so as to conduct a consolidation test; the lower end cover and the piston are respectively provided with a fluid inlet and a fluid outlet so as to conduct a penetration test; the piston and the lower end cover are respectively provided with an acoustic wave transmitting probe and an acoustic wave receiving probe so as to conduct an acoustic wave test; the side wall of the kettle body is further provided with a plurality of resistivity probes so as to conduct a resistivity test; the plug is pulled out to enablethe kettle body to be communicated with a sand outlet so as to conduct a sand production test, and the lower part of the kettle body is further provided with a collection port. The multifunctional reaction kettle can conduct a synthesis and decomposition test of a hydrate, and monitor the stress consolidation, sand production settlement, fluid migration law, acoustic waves, the resistivity and the like of the test sample under the condition of maintaining the overlying formation pressure.

Description

technical field [0001] The invention relates to the technical field of joint measurement of sand production and multi-physical parameters, in particular to a multifunctional reactor for hydrate mining reservoir response and sand production simulation. Background technique [0002] The occurrence environment of hydrate deposits in nature is quite complex. In the actual mining process, with the decomposition and production of multiphase fluids such as water and gas, the effective stress field around the mining strata will undergo complex changes, and the stratum itself The state of consolidation and compaction will also produce corresponding response behaviors such as settlement with the change of hydrate, which will greatly affect the safety and stability of the entire mining process. [0003] On the other hand, the decomposition of hydrates transforms solid phase components into gas phase and liquid phase components, which increases the pore volume of the reservoir to a cert...

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Problems solved by technology

[0003] On the other hand, the decomposition of hydrates transforms solid phase components into gas phase and liquid phase components, which increases the pore volume of the reservoir to a certain extent, which may contribute to the smooth flow of gas, but the subsidence and compaction of formation structures will also Further affecting the microscopic pore structure of the reservoir, causing changes in the permeability coefficient and thus changing the output of water-gas fluids, will also affect the efficiency of the entire mining process to a certain extent

In addition, after the reservoir has experienced a series of stress field changes, there may be a risk of local damage and stripping during the subsidence process, and the continuous migration of water and gas fluids may also cause changes in the position of particles and changes in the supporting structure. Weakening, threatening the safety, stability and efficiency of the mining process

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