WO2019010908A1 - 一种可燃冰旋喷卸压流态化开采方法 - Google Patents

一种可燃冰旋喷卸压流态化开采方法 Download PDF

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Publication number
WO2019010908A1
WO2019010908A1 PCT/CN2017/114451 CN2017114451W WO2019010908A1 WO 2019010908 A1 WO2019010908 A1 WO 2019010908A1 CN 2017114451 W CN2017114451 W CN 2017114451W WO 2019010908 A1 WO2019010908 A1 WO 2019010908A1
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Prior art keywords
mining
tubular string
combustible ice
outer tubular
reservoir
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PCT/CN2017/114451
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English (en)
French (fr)
Inventor
许兴亮
王东杰
孙大增
王志明
田素川
刘青鑫
刘忠堂
宋志坚
温鹏飞
李俊生
马晓健
俞庆彬
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates

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  • the invention relates to a flammable ice-spinning pressure-removing fluidized mining method, which is suitable for solid-state combustible ice mining in permafrost.
  • Combustible ice is a high-density, high-calorific, clean energy source. According to scientists' estimates, the total amount of global combustible ice resources is converted into methane gas, which is equivalent to two of the world's known total reserves of coal, oil and gas. With the depletion of the world's oil and gas resources, it is extremely urgent to seek new replacement energy sources with huge reserves. According to relevant data analysis, China's South China Sea slope, the southern part of Taiwan Island, the Okinawa Trough and the frozen soil layer of the Qinghai-Tibet Plateau are all subject to the formation of flammable ice. Therefore, carrying out and strengthening research on combustible ice is of great significance for solving China's energy shortage and the world energy crisis.
  • the main mining methods in each country are as follows: 1. Injecting a heating fluid by direct injection or directly heating the reservoir to increase the temperature in the hydrate region and cause dissolution. The energy consumption is large, and the defects of low heat utilization efficiency cannot be effectively solved. 2.
  • the pressure reduction method reduces the pressure to promote the decomposition of the hydrate. The method does not require continuous excitation, and the cost is low, which is suitable for large-area mining, and is currently the most promising.
  • a development technology 3, chemical reagent injection mining method, chemical reagent injection mining method by destroying combustible ice by injecting certain chemical reagents such as brine, methanol, ethanol, ethylene glycol, glycerin, etc.
  • the invention provides a flammable ice-spinning pressure-removing fluidized mining method, which can timely grasp the pressure changes in the reservoir, and correspondingly improve the treatment, avoiding the sudden change of reservoir pressure during the mining process and the like, affecting the safety of the hydrate reservoir structure.
  • the danger of sex and stability occurs.
  • a combustible ice-spinning pressure-removing fluidized mining method comprises the following steps:
  • the first step to determine the distribution of the combustible ice reservoir and the thickness of the reservoir;
  • the second step dividing the grid unit module of the combustible ice reservoir to form a plurality of mining unit modules;
  • the third step laying a mining hole on each mining unit module, the depth of the mining hole from the topsoil layer to the top of the combustible ice reservoir;
  • the fourth step using the double pipe column to mine the mining unit module, pre-installing the rotary nozzle at the bottom end of the inner pipe column, installing the sensor at the middle position of the inner wall of the outer pipe column and the bottom end of the inner pipe column;
  • Step 5 Install the outer tubular string at the center of the mining borehole, the bottom of which is placed in the non-permeable rock formation, and the inner tubular string with the rotary jet nozzle is inserted from the top of the outer tubular string and passes through the bottom of the outer tubular string. Extending into the combustible ice reservoir, a plurality of collecting holes are formed at the top of the outer tubular string, and each collecting hole is connected with a gas pumping chamber disposed on the ground;
  • Step 6 A water tank is arranged near the bottom of the inner tubular column.
  • the bottom of the water tank is connected with the rotary spray nozzle, and the top of the water tank is opened.
  • the opening is connected with the water tower on the ground through the hose, and the rotary spray nozzle is downward.
  • Rotary jet advancement, the rotary jet nozzle shoots high-speed flammable ice to the surrounding, crushes it, produces gaseous natural gas hydrate, and uses the outer tubular string to transport the generated gaseous natural gas hydrate to the air pump bin for collection until the mining unit module The natural gas hydrates in the collection are all collected;
  • Step 7 Repeat step 6 until all gas hydrates in other mining unit modules have been collected;
  • the diameter of the outer tubular string is the same as the diameter of the mining borehole
  • a support plate is mounted at the bottom end of the outer tubular string for providing support for the inner tubular string
  • the senor is a pressure sensor and a flow sensor, and the sensor is connected to the signal processor through a wire;
  • a water tank is disposed at a position near the bottom of the inner tubular string, and the depth of the water tank is 1 m.
  • the present invention has the following beneficial effects compared to the prior art:
  • the invention can carry out pressure relief mining of combustible ice resources, timely grasp the pressure changes in the reservoir, etc., and provide corresponding improvement treatment to avoid the damage of reservoir structure during the mining process and the safety of the hydrate reservoir structure.
  • the danger of stability occurs;
  • Figure 1 is a schematic view showing the structure of an apparatus for mining according to a preferred embodiment of the present invention
  • Figure 2 is a schematic structural view of an outer tubular string of a preferred embodiment of the present invention.
  • Figure 3 is a cross-sectional view along line A-A of a preferred embodiment of the present invention.
  • 1 is the mining hole
  • 2 is the inner pipe column
  • 3 is the support plate
  • 4 is the sensor
  • 5 is the air pump bin
  • 6 is the water tower
  • 7 is the annular sealing device
  • 8 is the outer pipe column
  • 9 is the rotary jet nozzle 10 is a hose
  • 11 is a non-permeable rock formation
  • 12 is a combustible ice reservoir.
  • the present invention includes the following technical features: a mining bore 1, an inner tubular string 2, a support plate 3, a sensor 4, a gas pump chamber 5, a water tower 6, an annular sealing device 7, and an outer tubular string 8, Rotary spray head 9, hose 10, non-permeable rock formation 11, combustible ice reservoir 12.
  • the mining principle of the present invention is to apply the "boundary layer surface effect", that is, when the fluid speed is increased, the object is connected to the fluid.
  • the pressure on the interface of the touch will decrease, otherwise the pressure will increase; due to the velocity gradient between the high-speed jet and the solid combustible ice, a pressure drop will occur; the surrounding pressure becomes lower, and the stable balance curve of the combustible ice is continuously destroyed, making the combustible
  • the ice reservoir begins to melt and the gas produced is continuously replenished into the free gas reservoir until the combustible ice is mined.
  • a flammable ice-spinning pressure-removing fluidized mining method of the present invention comprises the following steps:
  • the first step to determine the distribution of the combustible ice reservoir and the thickness of the reservoir;
  • the second step dividing the grid unit module of the combustible ice reservoir to form a plurality of mining unit modules;
  • the third step laying a mining hole on each mining unit module, the depth of the mining hole from the topsoil layer to the top of the combustible ice reservoir;
  • the fourth step using the double pipe column to mine the mining unit module, pre-installing the rotary nozzle at the bottom end of the inner pipe column, installing the sensor at the middle position of the inner wall of the outer pipe column and the bottom end of the inner pipe column;
  • Step 5 Install the outer tubular string at the center of the mining borehole, the bottom of which is placed in the non-permeable rock formation, and the inner tubular string with the rotary jet nozzle is inserted from the top of the outer tubular string and passes through the bottom of the outer tubular string. Extend into the combustible ice reservoir and seal with the annular sealing device at the top of the outer tubular string to prevent debris from entering the gap between the inner tubular string and the outer tubular string; a plurality of collecting holes are formed at the top end of the outer tubular string, each collecting hole Connected to a pumping station that is placed on the ground;
  • Step 6 A water tank is arranged near the bottom of the inner tubular column. The bottom of the water tank is connected with the rotary spray nozzle, and the top of the water tank is opened. The opening is connected with the water tower on the ground through the hose, and the rotary spray nozzle is downward.
  • the rotary jet nozzle shoots high-speed flammable ice to the surrounding, crushes it, produces gaseous natural gas hydrate, and uses the outer tubular string to transport the generated gaseous natural gas hydrate to the air pump bin for collection until the mining unit module
  • the natural gas hydrates in the collection are all collected; that is, the water pump tank sprays high pressure water into the water tank at the bottom of the inner pipe column through a soft water pipe, forms a high-pressure jet at the rotary spray nozzle, and adjusts the direction of the rotary spray nozzle to produce
  • the cutting plane is horizontal, the rotary nozzle rotates at a high speed, and the disc-shaped high-pressure jet ring ejected by it cuts and breaks the surrounding solid combustible ice, and gradually moves the rotary nozzle downward to the bottom of the combustible ice reservoir to form a radius.
  • the radius can be adjusted by jet pressure; some gaseous, liquid and if formed during the cutting process The solid state flammable ice is broken. At this time, the gaseous flammable ice is collected. As the free gas decreases, the surrounding pressure becomes lower, and the stable balance curve of the flammable ice is continuously damaged, so that the combustible ice reservoir begins to melt and the gas is continuously added. In a free gas reservoir until the combustible ice is mined;
  • Step 7 Repeat step 6 until all gas hydrates in other mining unit modules have been collected;
  • the diameter of the outer tubular string is the same as the diameter of the mining borehole
  • a support plate is mounted at the bottom end of the outer tubular string for providing support for the inner tubular string
  • the senor is a pressure sensor and a flow sensor, and the sensor is connected to the signal processor through a wire;
  • a water tank is disposed at a position near the bottom of the inner tubular string, and the depth of the water tank is 1 m.
  • the invention provides two sensors at different positions, can collect data on the mining surface, and can also monitor the information of the fluid in the collection pipeline to realize simultaneous monitoring of the beginning and the end, and comprehensive gas treatment and utilization on the surface.
  • the reservoir pressure information collected by the signal processor and the analysis and treatment of the injected fluid flow information can timely grasp the decomposition of the hydrate in the reservoir, and adjust the control of the hydrate decomposition gas production. speed.
  • the inner tubular string design cannot be a common equal-diameter tubular string of several hundred meters, which can generally be designed as a modular installation. That is, every certain length The degree is designed as a section, and the segment and the segment are connected by a connecting structure such as a buckle.
  • this patent uses a high-pressure water jet.
  • high-pressure water is injected into the pipe string that is open at one end, the high pressure carried by the high-pressure water itself is wasted, and the pressure requirement of forming a high-pressure jet at the nozzle of the jet nozzle cannot be completed.
  • the innovative method of the invention adopts the combination of the electric telescopic rod structure and the soft water pipe to solve one problem.
  • the hose is made of polyurethane material, ensuring that the water pipe can reach the working water pressure, and then the inside.
  • a 1m deep water tank is set at the bottom of the pipe column, the upper interface is connected with a soft water pipe, and the lower structure is connected with a rotary spray nozzle, so that the speed and pressure of the high pressure jet formed by the rotary jet nozzle can be adjusted by adjusting the water pressure in the ground water tank.
  • the length of the first section of the inner tubular string is greater than 10m of the outer tubular string to ensure the sealing and support between the inner tubular string and the outer tubular string.
  • the inner tubular string adopts an electric telescopic rod structure, and an electric motor is placed on the top of the inner tubular string. The change of the amount of expansion and contraction of the inner pipe string can be accurately realized by controlling the motor.
  • connection may be a direct connection between components or an indirect connection between components through other components.

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  • Engineering & Computer Science (AREA)
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  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

一种可燃冰旋喷卸压流态化开采方法,对可燃冰资源进行卸压开采的同时,能及时掌握储层内压力变化等情况,给出相应改善处理,且能够有效控制开采速度,同时能够对储层相关信息做到及时收集反馈和处理;同时本开采方法开采成本低,易实现,经济性高,开采技术简单,相关应用设备技术成熟,能较快实现工业开采应用。

Description

一种可燃冰旋喷卸压流态化开采方法 技术领域
木发明涉及一种可燃冰旋喷卸压流态化开采方法，适用于永久冻土层固态可燃冰开采。
背景技术
可燃冰是一种高密度、高热值、洁净型能源，据科学家估计，全球可燃冰的资源总量换算成甲烷气体约相当于全世界已知煤炭、石油和大然气等能源总储量的两倍；随着世界油气资源的枯竭，寻求储量巨大的新型接替能源已是迫在眉睫。据有关资料分析，我国南海陆坡、台湾岛南部海域、冲绳海槽以及青藏高原的冻土层都具备可燃冰形成的条件。因此，开展并加强可燃冰的研究，对解决我国能源紧缺和世界能源危机都具有重要意义。
现在各国主要的开采方法有如下几种：1、注热法注入加热流体或直接加热储层来提高水合物区域内温度，引起溶解。能耗大，不能有效解决热利用效率较低的缺陷；2、降压法，降低压力促使水合物分解，该方法不需要连续激发，成本较低，适合大面积开采，是目前最有前景的一种开发技术；3、化学试剂注入开采法，化学试剂注入开采法通过向可燃冰储层中注入某些化学试剂，如盐水、甲醇、乙醇、乙二醇、丙三醇等，破坏可燃冰藏的相平衡条件，促使可燃冰分解，这种方法虽然可降低初期能量输入，但缺陷却很明显，它所需的化学试剂费用昂贵，对可燃冰储层的作用缓慢；4、置换开采法，依据的仍然是可燃冰稳定带的压力条件在一定的温度条件下，可燃冰保持稳定需要的压力比CO2水合物更高，这种作用释放出的热量可使可燃冰的分解反应得以持续地进行下去，但是存在着较大的隐患，如果地质运动，将CO2大量释放出来的话，会给生态环境带来灾难性的后果。
迄今为止，尚未形成一种经济而有效的可以实现可燃冰的大规模商业化开采方法，而已知方法中单纯采用一种开采方法很难实现真正的商业开采目的，因此，急需新的开采方法来加快可燃冰的大规模商业化开采。
发明内容
本发明提供一种可燃冰旋喷卸压流态化开采方法，能及时掌握储层内压力变化等情况，给出相应改善处理，避免开采过程中储层压力剧变等影响水合物储层结构安全性和稳定性的危险发生。
本发明解决其技术问题所采用的技术方案是：
一种可燃冰旋喷卸压流态化开采方法，包括以下步骤：
第一步：探明可燃冰储层的分布及储层的厚度；
第二步：对可燃冰储层进行网格单元模块划分，形成若干个开采单元模块；
第三步：在每个开采单元模块上布设开采钻孔，开采钻孔的深度由表土层直至可燃冰储层顶部；
第四步：采用双管柱对开采单元模块进行开采，预先在内管柱底端安装旋喷喷头，在外管柱内壁的中间位置以及内管柱底端均安装传感器；
第五步：将外管柱安装在开采钻孔的中心位置，其底部置于非渗透岩层中，安装有旋喷喷头的内管柱由外管柱顶部伸入，穿过外管柱底部，伸进可燃冰储层内，外管柱的顶端开设多个采集孔，每个采集孔内连接一个布设在地面的气泵仓；
第六步：在内管柱靠近底部的位置布设有一个水仓，水仓底部与旋喷喷头联通，水仓顶部开设开口，开口内通过软管与地面的水塔相连通，旋喷喷头向下进行旋转喷射前进，旋喷喷头高速射向周围的固态可燃冰，将其破碎，产生气态天然气水合物，利用外管柱将产生的气态天然气水合物运送至气泵仓进行采集，直至该开采单元模块内的天然气水合物全部采集完毕；
第七步：重复第六步步骤，直至其他开采单元模块内的天然气水合物全部采集完毕；
作为本发明的进一步优选，外管柱的直径与开采钻孔的直径大小相同；
作为本发明的进一步优选，在外管柱的底端安装支撑板，用于为内管柱提供支撑；
作为本发明的进一步优选，所述的传感器为压力传感器和流量传感器，传感器通过导线与信号处理器相连通；
作为木发明的进一步优选，在内管柱靠近底部的位置布设有一个水仓，水仓的深度为1m。
通过以上技术方案，相对于现有技术，本发明具有以下有益效果：
1、本发明对可燃冰资源进行卸压开采的同时，能及时掌握储层内压力变化等情况，给出相应改善处理，避免开采过程中储层压力剧变等影响水合物储层结构安全性和稳定性的危险发生；
2、能够有效实现固态可燃冰的开采；
3、开采成本低、易实现且经济性高开采技术简单、相关应用设备技术成熟，能较快实现工业开采应用能够有效控制开采速度等同时能够对储层相关信息做到及时收集反馈和处理。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明的优选实施例的用于开采的设备装置结构示意图；
图2是本发明的优选实施例的外管柱的结构示意图；
图3是本发明的优选实施例的A-A剖面图。
图中：1为开采钻孔，2为内管柱，3为支撑板，4为传感器，5为气泵仓，6为水塔，7为环形密闭设备，8为外管柱，9为旋喷喷头，10为软管，11为非渗透岩层，12为可燃冰储层。
具体实施方式
现在结合附图对本发明作进一步详细的说明。这些附图均为简化的示意图，仅以示意方式说明本发明的基本结构，因此其仅显示与本发明有关的构成。
如图1-图3所示，本发明包括以下技术特征：开采钻孔1，内管柱2，支撑板3，传感器4，气泵仓5，水塔6，环形密闭设备7，外管柱8，旋喷喷头9，软管10，非渗透岩层11，可燃冰储层12。
本发明的开采原理是应用了“边界层表面效应”即流体速度加快时，物体与流体接 触的界面上的压力会减小，反之压力会增加；由于高速射流与固态可燃冰之间存在速度梯度，以致产生压力降；周围压力变低，可燃冰稳定的平衡曲线不断受到破坏，使得可燃冰储层开始融化并产出气体不断补充到游离气气库中，直到可燃冰开采完为止。
本发明的一种可燃冰旋喷卸压流态化开采方法，包括以下步骤：
第一步：探明可燃冰储层的分布及储层的厚度；
第二步：对可燃冰储层进行网格单元模块划分，形成若干个开采单元模块；
第三步：在每个开采单元模块上布设开采钻孔，开采钻孔的深度由表土层直至可燃冰储层顶部；
第四步：采用双管柱对开采单元模块进行开采，预先在内管柱底端安装旋喷喷头，在外管柱内壁的中间位置以及内管柱底端均安装传感器；
第五步：将外管柱安装在开采钻孔的中心位置，其底部置于非渗透岩层中，安装有旋喷喷头的内管柱由外管柱顶部伸入，穿过外管柱底部，伸进可燃冰储层内，在外管柱顶部用环形密闭设备密封，以防止杂物进入内管柱与外管柱之间的缝隙；外管柱的顶端开设多个采集孔，每个采集孔内连接一个布设在地面的气泵仓；
第六步：在内管柱靠近底部的位置布设有一个水仓，水仓底部与旋喷喷头联通，水仓顶部开设开口，开口内通过软管与地面的水塔相连通，旋喷喷头向下进行旋转喷射前进，旋喷喷头高速射向周围的固态可燃冰，将其破碎，产生气态天然气水合物，利用外管柱将产生的气态天然气水合物运送至气泵仓进行采集，直至该开采单元模块内的天然气水合物全部采集完毕；也就是说，水泵仓通过软水管将水高压喷入内管柱底部的水仓中，在旋喷喷头处形成高压射流，调整旋喷喷头的方向，使其产生的切割平面为水平方向，旋喷喷头高速转动，由其喷射出的圆盘状高压射流环切割和破碎周围固态可燃冰，逐渐向下移动旋喷喷头直到可燃冰储层底部，可形成半径可达5m的圆柱状开采空间，该半径大小可通过射流压力调整；在切割过程中形成一些气态、液态和若干破碎固态可燃冰，此时进行采集气态可燃冰，随着游离气体的不断减少，周围压力变低，可燃冰稳定的平衡曲线不断受到破坏，使得可燃冰储层开始融化并产出气体不断补充到游离气气库中，直到可燃冰开采完为止；
第七步：重复第六步步骤，直至其他开采单元模块内的天然气水合物全部采集完毕；
作为本发明的进一步优选，外管柱的直径与开采钻孔的直径大小相同；
作为本发明的进一步优选，在外管柱的底端安装支撑板，用于为内管柱提供支撑；
作为本发明的进一步优选，所述的传感器为压力传感器和流量传感器，传感器通过导线与信号处理器相连通；
作为本发明的进一步优选，在内管柱靠近底部的位置布设有一个水仓，水仓的深度为1m。
本发明在不同位置设置两个传感器，既可以在开采面进行数据的采集，同时也可以监测采集管路中流体的信息，来实现始段和末端的同时监测，地表设有气体综合处理和利用端；通过这个信号处理器收集得到的储层压力信息、注入流体流量信息的分析和处理，可以对储层内水合物分解情况得到及时掌握，并以此来调整控制水合物分解产气的开采速度。
在实际开采过程中，由于开采深度往往地表几百米以下，甚至达到数千米，故内管柱设计不能为一长达数百米的普通等直径管柱，一般可设计成模块化安设，即每隔一定长 度设计为一段，段与段之间用卡扣等连接结构进行连接。
但本专利采用的是高压水喷射，将高压水注入到一端开口的管柱中时将浪费掉高压水自身所携带的高压，也完成不了旋喷喷头处要形成高压射流所达到的压力要求，进一步也无法可燃冰开采，故本发明创新性的采用电动伸缩杆结构和软水管结合的方式来解决之一问题，首先软管采用聚氨酯材料制成，保证水管能够达到工作水压，然后在内管柱底部设立一个1m深的水仓，上部接口接软水管，下部结构接旋喷喷头，这样就可以通过在地面水仓调节水压来实现调节旋喷喷头出形成的高压射流的速度和压力，内管柱第一节长度要大于外管柱10m，以保证内管柱和外管柱之间的密闭和支撑，内管柱采用电动伸缩杆结构，在内管柱顶部置一电动马达，可通过控制马达来精准实现内管柱伸缩量的变化。
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)具有与本申请所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样定义，不会用理想化或过于正式的含义来解释。
木申请中所述的“和/或”的含义指的是各自单独存在或两者同时存在的情况均包括在内。
本申请中所述的“连接”的含义可以是部件之间的直接连接也可以是部件间通过其它部件的间接连接。
以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。

Claims (5)

  1. 一种可燃冰旋喷卸压流态化开采方法，其特征在于：包括以下步骤：
    第一步：探明可燃冰储层的分布及储层的厚度；
    第二步：对可燃冰储层进行网格单元模块划分，形成若干个开采单元模块；
    第三步：在每个开采单元模块上布设开采钻孔，开采钻孔的深度由表土层直至可燃冰储层顶部；
    第四步：采用双管柱对开采单元模块进行开采，预先在内管柱底端安装旋喷喷头，在外管柱内壁的中间位置以及内管柱底端均安装传感器；
    第五步：将外管柱安装在开采钻孔的中心位置，其底部置于非渗透岩层中，安装有旋喷喷头的内管柱由外管柱顶部伸入，穿过外管柱底部，伸进可燃冰储层内，外管柱的顶端开设多个采集孔，每个采集孔内连接一个布设在地面的气泵仓；
    第六步：在内管柱靠近底部的位置布设有一个水仓，水仓底部与旋喷喷头联通，水仓顶部开设开口，开口内通过软管与地面的水塔相连通，旋喷喷头向下进行旋转喷射前进，旋喷喷头高速射向周围的固态可燃冰，将其破碎，产生气态天然气水合物，利用外管柱将产生的气态天然气水合物运送至气泵仓进行采集，直至该开采单元模块内的天然气水合物全部采集完毕；
    第七步：重复第六步步骤，直至其他开采单元模块内的天然气水合物全部采集完毕。
  2. 根据权利要求1所述的可燃冰旋喷卸压流态化开采方法，其特征在于：外管柱的直径与开采钻孔的直径大小相同。
  3. 根据权利要求1所述的可燃冰旋喷卸压流态化开采方法，其特征在于：在外管柱的底端安装支撑板，用于为内管柱提供支撑。
  4. 根据权利要求1所述的可燃冰旋喷卸压流态化开采方法，其特征在于：所述的传感器为压力传感器和流量传感器，传感器通过导线与信号处理器相连通。
  5. 根据权利要求1所述的可燃冰旋喷卸压流态化开采方法，其特征在于：在内管柱靠近底部的位置布设有一个水仓，水仓的深度为1m。
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