Title:
METHOD FOR REINFORCING NATURAL GAS HYDRATE RESERVOIR
Document Type and Number:
WIPO Patent Application WO/2022/237777
Kind Code:
A1
Abstract:
The present invention relates to a method for reinforcing a natural gas hydrate reservoir. The natural gas hydrate reservoir comprises an upper covering layer (1) and a lower covering layer (2), wherein a hydrate region (3) for natural gas hydrate occurrence is arranged between the upper covering layer (1) and the lower covering layer (2), and a seepage channel (4) is present in the hydrate region (3). The method comprises: injecting a microbial solution capable of improving alkalinity and promoting generation of carbonate into a seepage channel (4) of a hydrate region; and after the injection of the microbial solution capable of improving alkalinity and promoting generation of the carbonate, injecting a cement liquid into the seepage channel (4) of the hydrate region at an interval of a first preset time length, such that the cement liquid reacts with the microbial solution capable of improving alkalinity and promoting generation of the carbonate to generate sediment (6). By means of the method, the effects of expanding a reinforcing range of an argillaceous silty sand hydrate reservoir, reinforcing the argillaceous silty sand hydrate reservoir and also improving the permeability of the argillaceous silty sand hydrate reservoir, reducing the heterogeneity of a reinforcement effect of the hydrate reservoir along with change of a horizontal distance, and improving grain size distribution of the hydrate and a composition proportion of a soil body can be achieved.
Inventors:
WANG YUZE (CN)
YANG JIANYU (CN)
YANG JIANYU (CN)
Application Number:
PCT/CN2022/091976
Publication Date:
November 17, 2022
Filing Date:
May 10, 2022
Export Citation:
Assignee:
UNIV SOUTHERN SCI & TECH (CN)
International Classes:
E21B33/13; E21B43/38
Foreign References:
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Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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