CN205714119U - A kind of gas hydrate quarrying apparatus - Google Patents

A kind of gas hydrate quarrying apparatus Download PDF

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Publication number
CN205714119U
CN205714119U CN201620400764.4U CN201620400764U CN205714119U CN 205714119 U CN205714119 U CN 205714119U CN 201620400764 U CN201620400764 U CN 201620400764U CN 205714119 U CN205714119 U CN 205714119U
Authority
CN
China
Prior art keywords
way valve
injection unit
gas
tubing string
fluid reservoir
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620400764.4U
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Chinese (zh)
Inventor
张耕培
刘音
周俊然
王益山
范永涛
杨晓勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNPC Bohai Drilling Engineering Co Ltd
Original Assignee
CNPC Bohai Drilling Engineering Co Ltd
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Publication date
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Priority to CN201620400764.4U priority Critical patent/CN205714119U/en
Application granted granted Critical
Publication of CN205714119U publication Critical patent/CN205714119U/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0099Equipment 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

Abstract

This utility model provides a kind of gas hydrate quarrying apparatus, including borehole systems, injected system and mining system;Described borehole systems includes wellhead assembly and flows to and by the gas production tubing string arranged on the three-way valve of medium kind and wellhead assembly and operation tubing string for changing medium;Operation tubing string lower edge is less than described gas production tubing string lower edge;Three ports of three-way valve are connected with described borehole systems, injected system and mining system by trunk pipeline respectively;Injected system includes acid solution injection unit, alkali liquor injection unit and fracturing fluid injection unit.This utility model utilizes fracturing fluid injection unit to expand output passage, and acid, alkali liquor can be injected into reservoir, based on acid-base neutralization heat release principle, utilize in the concentrated solution of drilling fluid and acidifying solution and heat release, and comprehensively other recovery methods use in the lump, production efficiency can be improved, reduce cost of winning.

Description

A kind of gas hydrate quarrying apparatus
Technical field
This utility model belongs to oil-gas drilling equipment technical field, especially relates to a kind of natural gas Hydras quarrying apparatus.
Background technology
Along with the economic development growth to demand for energy, the continuous extension in oil and gas development field, now may be used Conventional gas and oil by supply becomes a kind of resource less and less.Energy development has been had to from conventional gas and oil Exploitation turns to unconventionaloil pool to develop, and the kind of unconventionaloil pool is more, reserves not phase each with exploitation difficulty With, gas hydrate is exactly one of which novel energy.It is estimated that as natural in worldwide The methane content at least 10,000,000,000,000 tons of air water compound constraint, therefore gas hydrate has bright prospects And development space.At present, the recovery method of gas hydrate mainly includes thermal excitation, voltage drop method, note Chemical method, carbon dioxide replacement method and solids production method, due to the specific properties of gas hydrate, It is long that natural gas to be made disengaging hydrone fetters the often cycle, and loses with amount of heat, and production efficiency is low, Cost is high.At present, conventional gas and oil exploitation often discarding with a large amount of all kinds of drill in fluids, not only increase Add cost of winning and processing cost, easily pollute environment simultaneously.
Summary of the invention
In view of this, this utility model is directed to a kind of gas hydrate quarrying apparatus, it is to avoid big The well liquid of amount is discarded, and reduces cost of winning and processing cost, decreases environmental pollution simultaneously.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of gas hydrate quarrying apparatus, including for connecting the borehole systems of reservoir and ground, use In the injected system injecting fracturing fluid pressure break payzone and the mining system exploited for natural gas blood pressure lowering; Described borehole systems includes wellhead assembly and flows to and by the threeway of medium kind for changing medium The gas production tubing string arranged on valve and wellhead assembly and operation tubing string;Described operation tubing string lower edge is less than Described gas production tubing string lower edge;Three ports of described three-way valve are respectively by trunk pipeline and described well System, injected system and mining system connect;Described injected system includes acid solution injection unit, alkali liquor Injection unit and fracturing fluid injection unit.
Further, connect below described wellhead assembly and have steady pipe, outside this steady pipe, be provided with sleeve pipe, It is provided with packer between described steady pipe and described sleeve pipe;Described casing shoe is provided with casing shoe.
Further, the trunk pipeline between described three-way valve and described wellhead assembly is provided with piezometer And thermometer.
Further, described acid solution injection unit includes the acid being connected by submain line with described three-way valve Liquid fluid reservoir, is provided with fluid flowmeter between described acid solution fluid reservoir and described three-way valve.
Further, described alkali liquor injection unit includes the alkali being connected by submain line with described three-way valve Liquid fluid reservoir, described alkali liquor fluid reservoir connects and has air accumulator;In described alkali liquor fluid reservoir and described threeway Fluid flowmeter it is provided with between valve.
Further, described pressure break injection unit includes the fracturing fluid being connected by submain line with three-way valve Fluid reservoir, is provided with force (forcing) pump and fluid flowmeter between fracturing fluid fluid reservoir and described three-way valve.
Further, described mining system includes that the gas-liquid being connected with described three-way valve by submain line is divided From tank;Connect on described knockout drum and have gas transmission line and a fluid reservoir, and described knockout drum with It is provided with pressure relief device between described three-way valve.
Relative to prior art, this utility model has the advantage that
The injected system that this gas hydrate quarrying apparatus is arranged includes that acid solution injection unit, alkali liquor inject Unit and fracturing fluid injection unit, expanded output passage by fracturing fluid injection unit, and can by acid, Alkali liquor is injected into reservoir, based on acid-base neutralization heat release principle, utilizes in the concentrated solution of drilling fluid and acidifying solution And heat release, and comprehensively other recovery methods use in the lump, can improve production efficiency, reduce cost of winning.
Accompanying drawing explanation
The accompanying drawing constituting a part of the present utility model is further appreciated by of the present utility model for providing, Schematic description and description of the present utility model is used for explaining this utility model, is not intended that this reality With novel improper restriction.In the accompanying drawings:
Fig. 1 is apparatus system schematic diagram of the present utility model.
Description of reference numerals:
1-wellhead assembly;2-three-way valve;3-gas production tubing string;4-operates tubing string;5-trunk pipeline;6- Steady pipe;7-sleeve pipe;8-packer;9-pipe shoe;10-submain line;11-acid solution fluid reservoir;12- Alkali liquor fluid reservoir;13-air accumulator;14-fracturing fluid fluid reservoir;15-force (forcing) pump;16-knockout drum; 17-gas transmission line;18-fluid reservoir;19-pressure relief device;20-reservoir.
Detailed description of the invention
It should be noted that in the case of not conflicting, in embodiment in this utility model and embodiment Feature can be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke To ", " on ", D score, "front", "rear", "left", "right", " vertically ", " water Flat ", the orientation that indicates of " top ", " end ", " interior ", " outward " etc. or position relationship be based on attached Orientation shown in figure or position relationship, be for only for ease of description this utility model and simplify description, and not Be instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second " Etc. being only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate indication The quantity of the technical characteristic shown.Thus, the feature defining " first ", " second " etc. can be expressed Or implicitly include one or more this feature.In description of the present utility model, unless otherwise Illustrating, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, Can also be to removably connect, or be integrally connected;Can be to be mechanically connected, it is also possible to be electrical connection; Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the company of two element internals Logical.For the ordinary skill in the art, can understand that above-mentioned term is at this by concrete condition Concrete meaning in utility model.
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of gas hydrate quarrying apparatus, as it is shown in figure 1, include for connecting reservoir and ground Borehole systems, for inject fracturing fluid pressure break payzone injected system and for natural gas blood pressure lowering exploit Mining system;Described borehole systems includes wellhead assembly 1 and flows to for changing medium and pass through The gas production tubing string 3 arranged on the three-way valve 2 of medium kind and wellhead assembly 1 and operation tubing string 4; Described operation tubing string 4 lower edge is less than described gas production tubing string 3 lower edge;Three ports of described three-way valve 2 It is connected with described borehole systems, injected system and mining system by trunk pipeline 5 respectively;Described note Enter system and include acid solution injection unit, alkali liquor injection unit and fracturing fluid injection unit.Operation tubing string 4 Lower edge is less than described gas production tubing string 3 lower edge, injects liquid and can flow into reservoir smoothly, it is ensured that cements out Natural gas can be discharged through gas production tubing string 3 smoothly.
Wherein, connect below described wellhead assembly 1 and have steady pipe 6, outside this steady pipe 6, be provided with sleeve pipe 7, between described steady pipe 6 and described sleeve pipe 7, it is provided with packer 8;Described sleeve pipe 7 bottom is provided with set Pipe shoe 9, reasonable structural arrangement, solid and reliable.
Wherein, the trunk pipeline 5 between described three-way valve 2 and described wellhead assembly 1 is provided with pressure Power meter and thermometer, can monitor gas pressure and temperature in real time.
Wherein, described acid solution injection unit includes being connected with described three-way valve 2 by submain line 10 Acid solution fluid reservoir 11, be provided with fluid flow between described acid solution fluid reservoir 11 and described three-way valve 2 Meter.
Wherein, described alkali liquor injection unit includes being connected with described three-way valve 2 by submain line 10 Alkali liquor fluid reservoir 12, on described alkali liquor fluid reservoir 12 connect have air accumulator 13;At described alkali liquor liquid storage It is provided with fluid flowmeter between tank 12 and described three-way valve 2.
Wherein, described pressure break injection unit includes being connected with described three-way valve 2 by submain line 10 Fracturing fluid fluid reservoir 14, between fracturing fluid fluid reservoir 14 and described three-way valve 2, be provided with force (forcing) pump 15 and fluid flowmeter.
Wherein, described mining system includes the gas being connected by submain line 10 with described three-way valve 2 Liquid knockout drum 16;Connect on described knockout drum 16 and have gas transmission line 17 and fluid reservoir 18, and It is provided with pressure relief device 19 between described knockout drum 16 and described three-way valve 2, unloads owing to being provided with Pressure device 19, taps natural gas therefore, it is possible to realize blood pressure lowering, and production efficiency is high, low cost.
A kind of recovery method applying above-mentioned gas hydrate quarrying apparatus, comprises the steps:
1. setting up the exploitation well of gas hydrate, concrete method is: in gas hydrate Tibetan area Bore vertical boreholes, when being drilled into above reservoir 10m at, stop brill setting of casing 7 and cement the well, being then drilled into storage Stop at 5m to bore above layer lower end, under enter to operate tubing string 4 and gas production tubing string 3, barefoot completion.
2. close gas production tubing string 3, open operation tubing string 4, start force (forcing) pump 15, by fracturing fluid fluid reservoir In 14, fracturing fluid is pressurized to 40MPa, and fracturing fluid injects reservoir 20, by fluid flowmeter monitoring pressure Split liquid injection rate, it is achieved fracturing work, form crack.
3. open air accumulator 13, the carbon dioxide in air accumulator 13 injected alkali liquor fluid reservoir 11, Acid solution in acid solution fluid reservoir 11 is injected reservoir 20, monitors acid solution injection rate by fluid flowmeter, Complete acid solution to inject.
4., after completing acid solution injection, the alkali liquor in alkali liquor fluid reservoir 12 is injected reservoir, passes through fluid flow Meter monitoring alkali liquor injection rate, after completing alkali liquor injection, shutoff operation tubing string.
5. closing well 1-3 days, treat that acid-base neutralization heat release excites gas hydrate in reservoir, and disengage dioxy After change carbon gas realizes gas replacement, open gas production tubing string 3 and pressure relief device 19.Natural gas is through main Trunk pipeline 5 and submain line 10, arrive knockout drum 16 and separate, and output water enters fluid reservoir 18, natural gas is exported by gas transmission line 17.
6. detect piezometer, when output gas pressure drops to less than the 30% of initial pressure, stop Gas production, and repeat step 2.-5., strengthen the injection rate of acid solution and alkali liquor persistently to excite production capacity simultaneously.
The injected system that this gas hydrate quarrying apparatus is arranged includes that acid solution injection unit, alkali liquor inject Unit and fracturing fluid injection unit, expanded output passage by fracturing fluid injection unit, and can by acid, Alkali liquor is injected into reservoir, based on acid-base neutralization heat release principle, utilizes in the concentrated solution of drilling fluid and acidifying solution And heat release, and comprehensively other recovery methods use in the lump, production efficiency is high, and cost of winning is low.
The foregoing is only preferred embodiment of the present utility model, not new in order to limit this practicality Type, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement made Deng, within should be included in protection domain of the present utility model.

Claims (7)

1. a gas hydrate quarrying apparatus, it is characterised in that: include for connecting reservoir and ground The borehole systems in face, for injecting the injected system of fracturing fluid pressure break payzone and for natural gas blood pressure lowering The mining system of exploitation;Described borehole systems includes wellhead assembly and flows to and logical for changing medium Cross the gas production tubing string arranged on the three-way valve of medium kind and wellhead assembly and operation tubing string;Described Operation tubing string lower edge is less than described gas production tubing string lower edge;Three ports of described three-way valve are respectively by main Trunk pipeline is connected with described borehole systems, injected system and mining system;Described injected system includes acid Liquid injection unit, alkali liquor injection unit and fracturing fluid injection unit.
A kind of gas hydrate quarrying apparatus the most according to claim 1, it is characterised in that: Below described wellhead assembly connect have steady pipe, be provided with sleeve pipe outside this steady pipe, described steady pipe with It is provided with packer between described sleeve pipe;Described casing shoe is provided with casing shoe.
A kind of gas hydrate quarrying apparatus the most according to claim 1, it is characterised in that: On trunk pipeline between described three-way valve and described wellhead assembly, piezometer and thermometer are installed.
A kind of gas hydrate quarrying apparatus the most according to claim 1, it is characterised in that: Described acid solution injection unit includes the acid solution fluid reservoir being connected by submain line, institute with described three-way valve State and be provided with fluid flowmeter between acid solution fluid reservoir and described three-way valve.
A kind of gas hydrate quarrying apparatus the most according to claim 1, it is characterised in that: Described alkali liquor injection unit includes the alkali liquor fluid reservoir being connected by submain line, institute with described three-way valve State to connect on alkali liquor fluid reservoir and have air accumulator;It is provided with between described alkali liquor fluid reservoir and described three-way valve Fluid flowmeter.
A kind of gas hydrate quarrying apparatus the most according to claim 1, it is characterised in that: Described pressure break injection unit includes the fracturing fluid fluid reservoir being connected by submain line with described three-way valve, Force (forcing) pump and fluid flowmeter it is provided with between fracturing fluid fluid reservoir and described three-way valve.
A kind of gas hydrate quarrying apparatus the most according to claim 1, it is characterised in that: Described mining system includes the knockout drum being connected by submain line with described three-way valve;Described gas Connect on liquid knockout drum and have gas transmission line and fluid reservoir, and at described knockout drum and described three-way valve Between be provided with pressure relief device.
CN201620400764.4U 2016-05-05 2016-05-05 A kind of gas hydrate quarrying apparatus Expired - Fee Related CN205714119U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620400764.4U CN205714119U (en) 2016-05-05 2016-05-05 A kind of gas hydrate quarrying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620400764.4U CN205714119U (en) 2016-05-05 2016-05-05 A kind of gas hydrate quarrying apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107630683A (en) * 2017-08-09 2018-01-26 广州海洋地质调查局 A kind of pipeline structure for exploitation of gas hydrates
CN107859505A (en) * 2017-10-31 2018-03-30 中国石油大学(北京) A kind of gas hydrates stable point of increasing device adopted and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107630683A (en) * 2017-08-09 2018-01-26 广州海洋地质调查局 A kind of pipeline structure for exploitation of gas hydrates
CN107859505A (en) * 2017-10-31 2018-03-30 中国石油大学(北京) A kind of gas hydrates stable point of increasing device adopted and method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161123

Termination date: 20170505

CF01 Termination of patent right due to non-payment of annual fee