A system and method for producing natural gas hydrate horizontally butted wells in permafrost regions
A mining method and natural gas technology, applied in the direction of mining fluid, earthwork drilling, drilling equipment, etc., can solve the problems of mining equipment loss, energy waste, condensation, etc., and achieve the effects of mining, reducing working pressure, and short heating time
Active Publication Date: 2022-06-21
OIL & GAS SURVEY CGS +2
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Problems solved by technology
[0007] For this reason, the embodiment of the present invention provides a natural gas hydrate horizontal docking well production system and method in permafrost regions to solve the problem of long heating time of the circulating medium in the prior art, resulting in waste of energy, and the possibility of low temperature in the circulating medium. The condensation of water vapor also affects the normal use of the horizontal heating pipeline, thus causing losses to the entire mining equipment
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[0039] The embodiments of the present invention are described below by specific specific embodiments. Those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0040] like figure 1 and figure 2 As shown, the present invention provides a system and method for producing a natural gas hydrate horizontal butt well in a permafrost region. The horizontal butt well in this embodiment is divided into a horizontal heating pipeline and a vertical collection pipeline. The vertical collection pipeline is first broken by pumping and depressurizing equipment. Reservoir balance of...
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The embodiment of the present invention discloses a natural gas hydrate horizontal docking well production system and method in permafrost regions, including the following steps: laying down a vertical pipeline in the vertical well section in the middle of the horizontal docking well, and laying down vertical pipelines on both sides of the vertical pipeline The heating pipeline is installed in the directional well section; the heated natural gas is pressurized as a circulating medium and introduced into the heating pipeline; the hot natural gas is passed down to the hot gas retention area of the heating pipeline, and the hot natural gas stays in the hydrate production layer for heating Exchange; the cooled natural gas is pumped from the hot gas retention area to the heating box for reheating, and the heated hot natural gas is re-pressed to the hot gas retention area for circulation and cooling; this scheme separates the pipeline for collecting natural gas from the pipeline for circulating natural gas, Compared with the existing technology, the working pressure of the heater can be reduced, and the heating time is shorter; the circulating heating of natural gas can keep dry conditions at all times, the damage to the entire mining equipment is low, and long-term mining work can be realized.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of natural gas hydrate exploitation, and in particular, to a system and method for exploiting natural gas hydrate horizontally butted wells in permafrost regions. Background technique [0002] According to the natural gas hydrate mining plan and measures and the actual experience of oil and gas development, it is proposed that electricity is used as power, and the natural gas decomposed in the hole is used as the circulating medium. All-in-one, an economical and environmentally friendly mining solution for remote alarm monitoring. [0003] According to the natural gas hydrate reserves and geological characteristics in the Muli area, the submersible pump drainage method is used for depressurization mining, so that the water layer is kept below the natural gas hydrate layer, and the hydrate layer is no longer subject to groundwater pressure, 1. Breaking its high pressure 2. After dec...
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IPC IPC(8): E21B43/24E21B43/30E21B17/02
CPCE21B43/24E21B43/305E21B17/028
Inventor 庞守吉张帅肖睿王平康张家政李鑫淼王汉宝张永勤祝有海卢振权高相宇郭俊飞
Owner OIL & GAS SURVEY CGS