Experiment device for simulating natural gas hydrate formation well cementation

An experimental device, natural gas technology, applied in teaching models, wellbore/well components, production fluids, etc., can solve problems such as data collection and analysis of hydration heat of cement slurry that cannot be cemented, so as to enhance independent innovation capabilities and fill technical gaps Effect

Active Publication Date: 2020-02-11
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

However, no experimental device capable of simulating the actual cementing environment has been developed so far, and it is impossible to study the conduction law of the hydration heat of

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  • Experiment device for simulating natural gas hydrate formation well cementation

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[0015] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

[0016] In an exemplary embodiment, the embodiment of the present invention provides an experimental device for simulating cementing in a natural gas hydrate formation, including: a kettle body 100, a gas-liquid pressurized injection system 200, a cement slurry injection system 400, and a temperature control system And data processing system.

[0017] The kettle body 100 includes a kettle barrel 110 and a kettle cover 120. The kettle barrel 110 includes a first space 130 for filling a stratum framework simulant and a second space 140 for injecting cement slurry. The second space 140 is locate...

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Abstract

The invention discloses an experiment device for simulating natural gas hydrate formation well cementation, and relates to the technical field of unconventional oil-gas reservoir development. The experiment device comprises a kettle body, a gas liquid pressurizing injection system, a cement paste injection system, a temperature control system and a data processing system, wherein the kettle body comprises a kettle tube and a kettle cover; a first space used for being filled with formation skeleton simulation materials and a second space used for being injected with cement paste are formed inside the kettle tube; the second space is positioned between the first space and the kettle cover; the gas liquid pressurizing injection system communicates with the second space through a second pipeline, and is used for injecting the cement paste into the second space; the temperature control system is used for controlling the temperature of the kettle tube and the kettle cover; and the data processing system is used for collecting temperature or pressure data in the first space and the second space, and processing and analyzing the data. The experiment device realizes the in-situ test in aspects of conduction laws of well cementation cement paste hydration heat in the well cementation process in the hydrate containing formation near the well wall, the influence of the well cementation cement paste hydration heat on the formation temperature and hydrate stability, and the like.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas reservoir development, and more specifically relates to an experimental device for simulating natural gas hydrate formation cementing. 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] Althoug...

Claims

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Application Information

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IPC IPC(8): E21B43/01E21B47/00E21B33/138G09B25/04
CPCE21B43/01E21B33/138E21B47/00G09B25/04
Inventor 宋维凯冯颖韬赵琥王清顺温达洋张浩陈宇汪蕾
Owner CHINA NAT OFFSHORE OIL CORP
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