Device and method for simulating the influence of overlying and edge low water layers on methane hydrate production
A methane hydrate and simulation device technology, which is applied in the fields of mining fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as insufficient understanding of water production laws, lack of water control measures, etc., and achieve easy disassembly and installation Effect
Active Publication Date: 2022-07-15
ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP +1
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem of lack of effective water control measures to guide the trial production of hydrate due to insufficient understanding of the water production law in the process of hydrate mining, and to provide a methane extraction method for the overlying and edge-low water layers. The simulation device and simulation experiment method for the influence of hydrate mining are used to explore the law of water production in the process of hydrate mining
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[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0036] like Figure 1-3 As shown in the figure, the simulation device provided by the present invention for the influence of the overlying and edge low water layers on the methane hydrate exploitation has the following structure: the simulation device includes a gas injection unit, a water injection unit, a reservoir simulation unit, a gas-liquid separation unit, and a data acquisition unit. system.
[0037] The water injection unit includes a deionized water tank 1 with a constant temperature water bath, and two parallel injection pumps (a water injection pump 3 and a water injection pump 5 ) connected to the water tank 1 . The pipeline close to the inlet of the injection pump...
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The invention discloses a simulation device and an experimental method for the influence of an overlying water layer and a low-edge water layer on methane hydrate exploitation. The simulation device includes a gas injection unit, a water injection unit, a reservoir simulation unit, a gas-liquid separation unit, and a data acquisition system; The reservoir simulation unit is immersed in the water bath heating tank. The reservoir simulation unit includes a cube-shaped sealed box. The inner cavity of the box is divided into upper, middle and lower cavities by two horizontally arranged partitions. The lower three-layer cavity is respectively used as the overlying water layer area, the hydrate reservoir area, and the edge low water layer area. Each area is provided with a water injection port, an air inlet, a pressure gauge, and a thermometer. The gas port is connected to the gas injection unit. An upright vertical wellbore and a horizontal wellbore are arranged in the box. The simulation device of the present invention can be used to study the influence of the overlying water layer area and the edge low water layer area on the exploitation of the hydrate reservoir area.
Description
technical field [0001] The invention relates to the technical field of methane hydrate exploitation, in particular to a simulation device and an experimental method for studying the influence of overlying water layers and edge low water layers on methane hydrate exploitation. Background technique [0002] Judging from the previous hydrate test production, the water production in the process of methane hydrate production has been greatly improved compared with traditional oil and gas reservoirs, and the co-production of gas and water has become an obvious feature of the hydrate production process. Due to the decomposition of hydrate, the rock skeleton of the hydrate-bearing reservoir has undergone great changes, and the massive production of water makes the sand migrate in the near-wellbore zone, resulting in serious sand production in the perforation section, or even collapse, and further damage to the supporting equipment. At the same time, a large amount of produced water...
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IPC IPC(8): E21B43/00E21B43/01E21B47/00E21B47/11
CPCE21B43/00E21B43/01E21B47/00
Inventor 廖晋梁豪姚哲郭书生廖高龙
Owner ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP