A Pipeline Monitoring System for Natural Gas Hydrate Exploitation
A monitoring system and hydrate technology, applied in the fields of fluid extraction, earthwork drilling, measurement, etc., can solve problems such as uncontrollable state
Active Publication Date: 2018-06-22
天津探海股份有限公司
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Problems solved by technology
[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a pipeline monitoring system for natural gas hydrate exploitation, which can solve the problem of uncontrollable state in the process of exploitation and production
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[0015] Hereinafter, the present invention will be further described with reference to the drawings and specific embodiments: the pipeline monitoring system of the present invention is applied to the pipeline for natural gas hydrate mining. The production pipeline includes a wellbore 100 deep into the underground production layer. An exhaust pipe 110 and a drainage pipe 120 are provided in the wellbore 100 to respectively discharge the produced gas and liquid out of the wellhead for further processing. The pipe section of the wellbore 100 in the mining mud layer is successively provided with a first sealed partition 101, a second sealed partition 102 and a third sealed partition 103 for sealing the pipe section from top to bottom. Between the first sealed septum 101 and the second sealed septum 102, the cavity outside the exhaust pipe 110 forms an annulus for buffer drainage, and the upper part of the annulus is connected to the lower end of the drainage pipe 120.
[0016] The el...
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The invention discloses a pipeline monitoring system for natural gas hydrate exploitation. The pipeline monitoring system comprises a subsea test tree, seven temperature pressure sensors and one or more temperature-measuring cables which are arranged in a wellbore. The pipeline monitoring system has the beneficial effects that the low-cost sensors are arranged in the designated location in the wellbore in a targeted mode, then the one or more temperature-measuring cables are arranged along the depth of the whole wellbore, and then the temperature and pressure parameters of all the sensors andthe continuous temperature of the whole wellbore are reported to an upper computer; through existing analysis and calculation, the sand and water output quantity and a secondary hydrate at a down-holeexploitation layer can be accurately understood to generate early warning and judgment, and an operator can inject a chemical inhibitor into a well in real time according to the calculation results;and by adjusting a working system, sand outlet is prevented, the water outlet quantity is accurately adjusted, and it is guaranteed that in the whole production process, the production negative pressure is controlled within the predetermined range.
Description
Technical field [0001] The invention relates to a monitoring system for mining mineral deposits, in particular to a pipeline monitoring system for natural gas hydrate mining. Background technique [0002] Natural gas hydrate, also known as "combustible ice", is an ice-like crystalline substance distributed in deep-sea sediments or permafrost on land and formed by natural gas and water under high pressure and low temperature conditions. Because its burning pollution is much smaller than coal, oil, and natural gas, and its reserves are abundant, the global reserves are enough for humans to use for 1,000 years, so it is regarded as an alternative energy source for oil and natural gas in the future. China, Japan, Canada and other countries have conducted trial mining of combustible ice, all using reduced pressure mining methods. [0003] The reduced pressure mining method is a mining method that promotes the decomposition of natural gas hydrate by reducing the pressure. The way to re...
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IPC IPC(8): E21B47/06E21B47/07E21B43/00E21B43/01E21B43/22
Inventor 陆敬安寇贝贝黄芳飞盛堰秦如雷万庭辉匡增桂陆红锋曲佳
Owner 天津探海股份有限公司