Hydrate/ice-containing low-temperature stratum well cementation simulation experiment reaction kettle

Abstract

The invention provides a hydrate/ice-containing low-temperature stratum well cementation simulation experiment reaction kettle which comprises a kettle barrel, a kettle cover, a bracket, a data processing system, a gas/liquid pressurized injection system and a cement paste injection system, wherein the inner cavity of the kettle barrel is divided into a sound wave detection cavity, a cement paste cavity and a simulated stratum cavity which are coaxial with one another through a first cavity wall and a sieving pipe which are arranged in sequence from inside to outside; a second cavity wall is inserted into the sieving pipe; a first liquid discharging opening is formed in the bottom of the cement paste cavity; a gas inlet and a second liquid discharging opening are formed in the bottom of the simulated stratum cavity; the kettle cover comprises a first circular kettle cover, a second annular kettle cover and a third annular kettle cover which are respectively matched with the tops of the sound wave detection cavity, the cement paste cavity and the simulated stratum cavity; the gas/liquid pressurized injection system is connected with an inlet in the bottom of the simulated stratum cavity; the cement paste injection system is connected with an inlet in the top of the cement paste cavity; the data processing system comprises a data detection device, a data receiving processing device and a computer image processor. The hydrate/ice-containing low-temperature stratum well cementation simulation experiment reaction kettle is simple in structure, reliable in operation and low in cost.

Description

technical field [0001] The invention belongs to the technical field of unconventional oil and gas reservoir development, and in particular relates to a hydrate / ice-containing low-temperature stratum cementing simulation experiment reactor. Background technique [0002] As a clean new energy with huge resource potential, natural gas hydrate is widely distributed in the porous media of terrestrial permafrost and seabed strata on the continental margin, and has been favored by more and more countries in the world. However, since natural gas hydrates only exist stably under high pressure and low temperature conditions, any change in temperature or pressure during drilling in hydrate-bearing formations may cause hydrate decomposition, cause wellbore instability, and cause serious drilling accidents and economic losses. loss. In order to complete the exploration, evaluation and exploitation of natural gas hydrate, well cementing is an essential and key technical means. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] In addition, when carrying out underground engineering construction in permafrost regions, the heat of concrete hydration has a certain thermal melting effect on the permafrost layer, which can easily lead to accidents such as stratum collapse and poor concrete consolidation quality. Pre-evaluate the possible adverse effects of the reinforced concrete or cement slurry used on the permafrost layer and its impact on the construction quality in order to reasonably control the construction process. It is also necessary to develop a suitable experimental evaluation device

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