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Stability evaluation method for marine natural gas hydrate pilot production reservoir

A technology of hydrate and natural gas, applied in the direction of climate sustainability, special data processing applications, instruments, etc., can solve the problems of inapplicable natural gas hydrate and achieve the effect of avoiding related disasters

Inactive Publication Date: 2017-12-29
GUANGZHOU MARINE GEOLOGICAL SURVEY
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] Different from oil and natural gas, oil and natural gas are a single fluid phase, and the existing oil and natural gas production reservoir stability analysis methods are not suitable for natural gas hydrate

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  • Stability evaluation method for marine natural gas hydrate pilot production reservoir
  • Stability evaluation method for marine natural gas hydrate pilot production reservoir
  • Stability evaluation method for marine natural gas hydrate pilot production reservoir

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Embodiment Construction

[0072] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0073] Explanation of the similarity criterion: In order to ensure that the physical processes of the prototype and the model are similar, the dimensionless control physical parameters in the prototype and model problems include geometry (length, thickness), kinematics (velocity, acceleration) and dynamics (force, energy) Dimensionless control parameters must ensure that these dimensionless control parameters are equal, that is, to obtain geometric similarity, ki...

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Abstract

The invention relates to a stability evaluation method for a marine natural gas hydrate pilot production reservoir and belongs to the field of natural gas hydrate production. The method comprises the steps that geological survey is performed on the marine natural gas hydrate pilot production reservoir, indoor physical simulation is performed according to similarity criteria, and a stability evaluation model of the marine natural gas hydrate pilot production reservoir is constructed to pre-evaluate the stability of the marine natural gas hydrate pilot production reservoir in the pilot production process. Through the method, mechanical responses, dynamic evolution and unstable critical conditions of the natural gas hydrate decomposition reservoir along with natural gas hydrate decomposition can be accurately described, accurate pre-evaluation is provided for the pilot production process of marine natural gas hydrate, and relevant disasters in a pilot production project of the marine natural gas hydrate can be avoided.

Description

technical field [0001] The invention belongs to the field of natural gas hydrate exploitation, and in particular relates to a method for evaluating the stability of marine natural gas hydrate trial production reservoirs. Background technique [0002] Gas hydrate is an ice-like crystalline substance distributed in deep sea sediments or permafrost in land areas, formed by natural gas and water under high pressure and low temperature conditions. Because its appearance is like ice and it can burn when exposed to fire, it is also called "combustible ice". Its resource density is high, the global distribution is extensive, and its reserves are greater than oil and natural gas, so it has extremely high resource value; in addition, from the perspective of national energy strategy and security, countries are promoting the diversification of energy sources. Therefore, the exploitation of natural gas hydrate has become a long-term research hotspot in the oil and gas industry. [0003...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02A90/10
Inventor 石要红张旭辉鲁晓兵梁前勇杨江平习龙
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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