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WO2007117167A1 - Procedure and apparatus for hydrocarbon gases extraction from under ground hydrates - Google Patents

Procedure and apparatus for hydrocarbon gases extraction from under ground hydrates Download PDF

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Publication number
WO2007117167A1
WO2007117167A1 PCT/RO2006/000008 RO2006000008W WO2007117167A1 WO 2007117167 A1 WO2007117167 A1 WO 2007117167A1 RO 2006000008 W RO2006000008 W RO 2006000008W WO 2007117167 A1 WO2007117167 A1 WO 2007117167A1
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WO
WIPO (PCT)
Prior art keywords
water
gas
pipes
gas hydrate
ground surface
Prior art date
Application number
PCT/RO2006/000008
Other languages
French (fr)
Inventor
Petru Baciu
Original Assignee
Petru Baciu
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Petru Baciu filed Critical Petru Baciu
Priority to PCT/RO2006/000008 priority Critical patent/WO2007117167A1/en
Publication of WO2007117167A1 publication Critical patent/WO2007117167A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C45/00—Methods of hydraulic mining; Hydraulic monitors
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/108—Production of gas hydrates
    • 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
    • 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • 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
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1029—Gas hydrates

Definitions

  • the hydrates or cryohydrates are such structures, which enclose in the water or water ice crystals on molecular level methane and other hydrocarbon gases.
  • the hydrates are found under ground, at various depths and various locations, on land and undersea and ocean floor, in such porous rock formations called gas hydrate zones (GHZ).
  • GZ gas hydrate zones
  • the present invention overcomes the above-mentioned methods in its ability to extract the methane gas from under ground GHZ by using pulsatory high-pressure injection of a fluid as water, hot water or salt-water solution in the entire mass of the desired portion of GHZ.
  • the injection will be done horizontally and simultaneously at many levels into the GHZ, through the wall's holes of a vertically positioned pipe between the ground surface to the bottom of the GHZ.
  • the water due to its pulsatory high pressure, penetrates the GHZ, cutting the rock, and due to its heat, the hydrate's volume from pores increases and breaks the rock and liberates the gas.
  • the gas then is being engaged in the water flow as a mixture, which is collected through the holes of some vertical positioned pipes between the ground surface and bottom of the gas hydrate zone.
  • the collector pipes are located at certain distance from and around the central injector.
  • the holes in each pipe's wall are only on the gas hydrate portion's zone height.
  • the mixture runs to the ground surface and through other vertical positioned pipes between the ground surface and the top of the gas hydrate zone.
  • the water gas is separated from the water, is liquefied and stored.
  • the water from the separator is heated again, sucked up by the pulsatory high- pressure water pump and introduced again into the circuit.
  • part of the water-gas mixture flow to run towards ground surface, passing through the ground layer located over the gas hydrate zone, case in which, on the ground surface, this portion of gas is detected and collected.
  • An apparatus which is capable of achieving the above-pressured procedure, is an embodiment of:
  • a water source which can be a river well, a reservoir or other source, from where the water is taken by a pump, heated in a heater, sucked by a pulsatory high pressure water pump and through an injector, and then is injected centrally into the gas hydrate zone.
  • the injector is a vertically positioned pipe between the ground surface and the bottom of gas hydrate zone.
  • the pipe in gas hydrate zone is provided with holes in the wall.
  • the down end of the pipe is not connected tightly with a concave cover, leaving a small open space between pipe and cover.
  • the hot pulsatory high pressure water through the injector holes is injected on multiple horizontal planes on the entire height of gas hydrate zone, and is injected horizontally too, at the bottom of gas hydrate zone through the small open space between the injector down pipe end and its concave cover.
  • the injected water by penetration into the porous rock crushes the rock and breaks the pore's wall and liberates the hydrocarbon gas.
  • the gas is engaged in the water flow, and as a mixture of water-gas runs through the crashed and broken porous rock, through some vertical collectors pipes, positioned between the ground surface and the gas hydrate bottom.
  • the pipes are located at certain distances around the central injector. Each pipe has holes on the entire height of gas hydrate zone.
  • the mixture too runs too parallel with collector pipes, through some evacuation vertical positioned holes and pipes between the ground surface and the bottom of gas hydrate zone, pipes located also at a certain distance around the central injector, but after the vertical collector pipes.
  • the water-gas mixture On the ground surface the water-gas mixture is separated due to the difference of the density of the water and gas. The gas then is liquefied and stored. The water is heated again and is sucked into the system.
  • the water is used only as an agent, it is not consumed after the system is filled; but some losses have to be covered.
  • the gas which comes up from the gas hydrate zone through the ground layer, is detected and collected in the upper side of the water-gas separator.
  • the fractures of the broken-off rock done by the water's pressure and heat remain as sediments inside the gas hydrate zone, due to their density being higher than the water's.
  • the vertical collector pipes can be cleaned from time to time by using high-pressure water.
  • the following advantages are acquired: the usage of a big source of combustible, ' which will reduce the effect of the energy needs. diminution of the atmosphere's pollution.
  • FIG. 1 The technological sketch of an apparatus for hydrocarbon gas extraction from underground hydrates, according with the invention.
  • Fig. 2 Section with a vertical plane through a gas hydrate zone showing how the injection pipe; the collector pipes, holes and evacuation pipes are located.
  • FIG. 3 Section with a horizontal plane through a gas hydrate zone showing the disposition of central injector, collector pipes, holes and the evacuation pipes.
  • Fig. 4 A collection of hydrocarbon gas which comes up from gas hydrate zone through ground surface.
  • the apparatus is an embodiment of some equipment as shown in Fig. 1 to 4, capable of extracting the hydrocarbon gases from gas hydrate zone, to liquefy and store them comprising: a water source (A); a centrifugal water pump (B); water tank (C); a centrifugal water pump (D); a water heater (E); a water-salt connection (E'), a pulsatory high pressure water pump (F); a header (G); pulsatory high pressure water injector (H); some perforated vertical collector pipes (J), some holes (K') and evacuation pipes (K) the ground (L), over the gas hydrate zone (M); the water-gas separator (N); the ground surface hydrocarbon gas collection system (N');the dryer (P) of humid hydrocarbon gas; the turbo- compressor (R) with its electromotor (R'); the gas expander (S); the liquid gas storage (T), with all the conduits and vales for connection between above equipments.
  • a water source A
  • a centrifugal water pump
  • the water injector (H) is made-up of a vertically positioned pipe between the ground (L) surface to the bottom of the gas hydrate zone (M).
  • the pipe's height between the top and bottom of the gas hydrate zone has holes (a) in the wall and the down end well connected but not tight with a concave cover (a') and leaving a small open space (a").
  • the water-gas mixture collectors pipes (J) are some vertically positioned pipes between ground surface and the bottom of the gas hydrate zone, pipes which are located at certain distance around the central injector (H). Each pipe has a perforated wall (b) along its entire height into the gas hydrate zone.
  • the water-gas mixture evacuation pipes (K) are some pipes vertically positioned between the ground (L) surface and the top of gas hydrate zone (M). The pipes (K) are located at a certain distance from the central injector (H). From the top and bottom of the gas hydrate is a hole (K').
  • the hydrocarbon gas collection system (N') is made from some inverse funnel, like some cones, placed over the seeps, place through which the gas is coming from gas hydrate zone through the ground layer; funnels, which are connected with the water-gas separator (N) with some pipes.
  • a centrifugal water pump B sucks the water, which is discharged in water tank (C) from where, with other centrifugal pump (D), the water is sucked and sent for heating inside of water (E).
  • E water
  • E' water salt solution
  • F pulsatory high pressure water pump
  • G header
  • injector H
  • the pulsatory high pressure water is injected through holes (a) of injector (H) on multiple horizontal planes from the bottom to the top of the rock formation zone (M) containing gas hydrate.
  • the hot water is consecutively flushed out and injected also into the horizontal plane at the bottom of gas hydrate zone (M) through the small open space (a") between the concave cover (a 5 ) of injector (H).
  • water-gas separator (N) the water-gas mixture is separated into water and gas due to the difference of density between them.
  • part of hydrocarbon gas from gas hydrate zone due to the water pressure, can come on the ground surface through the ground layer over the gas hydrate zone like some seeps.
  • This part of gas is sucked-collected by turbo compressor (R) through some inverse funnels " and conduits inside of water-gas separator (N).
  • the gas is then further sucked from the gas separator by turbo compressor (R), passing through dryer (P), dryer where the gas moisture is eliminated by cooling it with cool gas coming from the upside of expander (S) into the compressor (R) the dried gas is compressed due to the power done by its electromotor (R') and then expanded for liquefaction inside of expander (S).
  • the liquefied gas then goes inside of storage (T).
  • the separated water from water gas separator (P) goes in its adjacent water tank

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

The invention refers to a procedure and apparatus for hydrocarbon gases extraction from under ground gas hydrate formation by horizontal pulsatory high pressure water or hot water with salt solution injection. The apparatus is an embodiment of certain equipment located on ground surface over the gas hydrate zone, with which equipment the water is sucked by a pump, is heated in a heater and then is pumped pulsatorium at high pressure and through injectors. Injected on multiple horizontal levels on entire height of desired gas hydrate zone, cracking the rocks, melting the hydrate and carrying the gas in the water flow through cracked rocks and some collected and evacuation pipes from the gas hydrate zone to the ground surface where the gas is separated from the water, dryied, liquefied and stored.

Description

PROCEDURE AND APPARATUS FOR HYDROCARBON GASES EXTRACTION FROM UNDER GROUND HYDRATES
The hydrates or cryohydrates are such structures, which enclose in the water or water ice crystals on molecular level methane and other hydrocarbon gases. The hydrates are found under ground, at various depths and various locations, on land and undersea and ocean floor, in such porous rock formations called gas hydrate zones (GHZ).
Gas hydrates have been known for very long time ago, but only for some decades they have been studied.
Despite this endeavor, knowledge about gas hydrates still remain an issue, particularly about the possibility that they be used as a source of energy on behalf of mankind.
To extract hydrocarbon gas from GHZ one must to release the gas from the porous rock where the hydrates are enclosed. Methods for gas production from hydrates are known as: thermal stimulation, pressure reduction, inhibitor injection and so on, but none of these methods present a radical solution in the matter, in other words, all these methods are without any practical result.
The present invention overcomes the above-mentioned methods in its ability to extract the methane gas from under ground GHZ by using pulsatory high-pressure injection of a fluid as water, hot water or salt-water solution in the entire mass of the desired portion of GHZ. The injection will be done horizontally and simultaneously at many levels into the GHZ, through the wall's holes of a vertically positioned pipe between the ground surface to the bottom of the GHZ. The water, due to its pulsatory high pressure, penetrates the GHZ, cutting the rock, and due to its heat, the hydrate's volume from pores increases and breaks the rock and liberates the gas. The gas then is being engaged in the water flow as a mixture, which is collected through the holes of some vertical positioned pipes between the ground surface and bottom of the gas hydrate zone. The collector pipes are located at certain distance from and around the central injector. The holes in each pipe's wall are only on the gas hydrate portion's zone height.
The mixture runs to the ground surface and through other vertical positioned pipes between the ground surface and the top of the gas hydrate zone. On the ground surface, the water gas is separated from the water, is liquefied and stored.
The water from the separator is heated again, sucked up by the pulsatory high- pressure water pump and introduced again into the circuit.
In certain condition it is possible for part of the water-gas mixture flow to run towards ground surface, passing through the ground layer located over the gas hydrate zone, case in which, on the ground surface, this portion of gas is detected and collected.
The broken rock fractures done by the water's pressure and heat remain as sediments in the GHZ due to their density in relation with the water. An apparatus, which is capable of achieving the above-pressured procedure, is an embodiment of:
A water source, which can be a river well, a reservoir or other source, from where the water is taken by a pump, heated in a heater, sucked by a pulsatory high pressure water pump and through an injector, and then is injected centrally into the gas hydrate zone.
The injector is a vertically positioned pipe between the ground surface and the bottom of gas hydrate zone. The pipe in gas hydrate zone is provided with holes in the wall. The down end of the pipe is not connected tightly with a concave cover, leaving a small open space between pipe and cover.
The hot pulsatory high pressure water through the injector holes is injected on multiple horizontal planes on the entire height of gas hydrate zone, and is injected horizontally too, at the bottom of gas hydrate zone through the small open space between the injector down pipe end and its concave cover. The injected water by penetration into the porous rock crushes the rock and breaks the pore's wall and liberates the hydrocarbon gas. The gas is engaged in the water flow, and as a mixture of water-gas runs through the crashed and broken porous rock, through some vertical collectors pipes, positioned between the ground surface and the gas hydrate bottom. The pipes are located at certain distances around the central injector. Each pipe has holes on the entire height of gas hydrate zone.
The mixture too runs too parallel with collector pipes, through some evacuation vertical positioned holes and pipes between the ground surface and the bottom of gas hydrate zone, pipes located also at a certain distance around the central injector, but after the vertical collector pipes.
On the ground surface the water-gas mixture is separated due to the difference of the density of the water and gas. The gas then is liquefied and stored. The water is heated again and is sucked into the system.
The water is used only as an agent, it is not consumed after the system is filled; but some losses have to be covered.
The gas, which comes up from the gas hydrate zone through the ground layer, is detected and collected in the upper side of the water-gas separator.
The fractures of the broken-off rock done by the water's pressure and heat remain as sediments inside the gas hydrate zone, due to their density being higher than the water's. The vertical collector pipes can be cleaned from time to time by using high-pressure water.
By using the invention, the following advantages are acquired: the usage of a big source of combustible, 'which will reduce the effect of the energy needs. diminution of the atmosphere's pollution.
The following presents an example of an invention, realized in connection with figures 1 to 4, which represents: Fig. 1 The technological sketch of an apparatus for hydrocarbon gas extraction from underground hydrates, according with the invention.
Fig. 2 Section with a vertical plane through a gas hydrate zone showing how the injection pipe; the collector pipes, holes and evacuation pipes are located.
Fig. 3 Section with a horizontal plane through a gas hydrate zone showing the disposition of central injector, collector pipes, holes and the evacuation pipes.
Fig. 4 A collection of hydrocarbon gas which comes up from gas hydrate zone through ground surface.
The procedure for extraction of hydrocarbon gases from depths with gas hydrate, located under ground on land, into the porous rock formation consists in:
1. The pulsatory injection at high pressure of water, hot water or water salt solution from the ground surface facility into the under ground gas hydrate zone, simultaneous on multiple horizontal planes.
2. The cracking and breaking, due to the water pulsation high-pressure and heat the porous rock formation in which the hydrate is enclosed.
3. The liberation of gas from rock pores hydrate due to the water caloric energy.
4. The enclosing of gas in the water's circulation flow.
5. The sedimentation of rock fractures, due to their density inside of deposit.
6. The running up from gas hydrate zone the mixture of water-gas towards a water-gas separator located on the ground surface.
7. The separation on the ground surface of gases from water due to their different density.
8. The collection of hydrocarbon gas, which comes up from gas hydrate zone through the ground surface.
9. The elimination of the gas moisture by a cooling process.
10. The liquefaction and storage of gases.
The apparatus, according to the invention, is an embodiment of some equipment as shown in Fig. 1 to 4, capable of extracting the hydrocarbon gases from gas hydrate zone, to liquefy and store them comprising: a water source (A); a centrifugal water pump (B); water tank (C); a centrifugal water pump (D); a water heater (E); a water-salt connection (E'), a pulsatory high pressure water pump (F); a header (G); pulsatory high pressure water injector (H); some perforated vertical collector pipes (J), some holes (K') and evacuation pipes (K) the ground (L), over the gas hydrate zone (M); the water-gas separator (N); the ground surface hydrocarbon gas collection system (N');the dryer (P) of humid hydrocarbon gas; the turbo- compressor (R) with its electromotor (R'); the gas expander (S); the liquid gas storage (T), with all the conduits and vales for connection between above equipments. All other auxiliary equipments are not shown in the technological sketch Fig. 1 being well known for anyone with knowledge in the art. The water injector (H) is made-up of a vertically positioned pipe between the ground (L) surface to the bottom of the gas hydrate zone (M). The pipe's height between the top and bottom of the gas hydrate zone has holes (a) in the wall and the down end well connected but not tight with a concave cover (a') and leaving a small open space (a").
The water-gas mixture collectors pipes (J) are some vertically positioned pipes between ground surface and the bottom of the gas hydrate zone, pipes which are located at certain distance around the central injector (H). Each pipe has a perforated wall (b) along its entire height into the gas hydrate zone. The water-gas mixture evacuation pipes (K) are some pipes vertically positioned between the ground (L) surface and the top of gas hydrate zone (M). The pipes (K) are located at a certain distance from the central injector (H). From the top and bottom of the gas hydrate is a hole (K'). The hydrocarbon gas collection system (N') is made from some inverse funnel, like some cones, placed over the seeps, place through which the gas is coming from gas hydrate zone through the ground layer; funnels, which are connected with the water-gas separator (N) with some pipes.
All other equipments used in this technology are common and well known. The apparatus is working as follows: From the water surface (A) a centrifugal water pump (B) sucks the water, which is discharged in water tank (C) from where, with other centrifugal pump (D), the water is sucked and sent for heating inside of water (E). In the heated water is injected through pos. (E') water salt solution and then is sucked by pulsatory high pressure water pump (F) and through header (G) injector (H) the pulsatory high pressure water is injected through holes (a) of injector (H) on multiple horizontal planes from the bottom to the top of the rock formation zone (M) containing gas hydrate. The hot water is consecutively flushed out and injected also into the horizontal plane at the bottom of gas hydrate zone (M) through the small open space (a") between the concave cover (a5) of injector (H).
Due to the pulsatory high-pressure water injection into the porous rock formation (M) the rock is crashed and due to the water heat induced in the rock pores hydrate, the hydrate will melt. The hydrate's volume will increase, the rock walls will break, the gas will be liberate and engaged in the water flow and together, as a mixture, will run out towards the water-gas separator (N) located on the ground (L) surface, passing through crushed porous rock formation (M), running through some vertical collector pipes (J) and parallel through some evacuation pipe (K) and over conduits.
In the water-gas separator (N) the water-gas mixture is separated into water and gas due to the difference of density between them. As mentioned above, part of hydrocarbon gas from gas hydrate zone, due to the water pressure, can come on the ground surface through the ground layer over the gas hydrate zone like some seeps. This part of gas is sucked-collected by turbo compressor (R) through some inverse funnels "and conduits inside of water-gas separator (N).
The gas is then further sucked from the gas separator by turbo compressor (R), passing through dryer (P), dryer where the gas moisture is eliminated by cooling it with cool gas coming from the upside of expander (S) into the compressor (R) the dried gas is compressed due to the power done by its electromotor (R') and then expanded for liquefaction inside of expander (S). The liquefied gas then goes inside of storage (T).
The separated water from water gas separator (P) goes in its adjacent water tank
(C).
From the water tank (C) the water enters in the system again. The water is used as an agent, it is not consumed, after the filling of gas extraction system, but some losses should be completed.
The broken rock fractures done by the water pressure and heat remain as sediments inside of the rock formation zone (M), due to their density in relation with the water. hi order to help the collector pipes (J) work well, in other words to eliminate some rock fractures which could obstruct the holes of pipes or the pipes themselves, the provided high-pressure conduit between the heder (G) and collector conduit (J) will permit to use the pulsatory high-pressure water to clean the above mentioned holes and pipes.

Claims

1. A method of extracting hydrocarbon gases from under ground porous rock formation with hydrate, comprising ot the steps: production of hot pulsatory high-pressure water. simultaneous injection of water or hot water at pulsatory high pressure from a ground surface facility, on multiple horizontal planes on the entire height of porous rock formation. the cracking and breaking of the porous rock due to the pulsatory high pressure and heat water. the liberation of hydrocarbon gases from porous rock hydrate, due to water heat. the enclosing of hydrocarbon gas into the water flow and its running through crashed rock, some holes and vertical collector pipes, evacuation pipes from the gas hydrate zone up to the ground surface facility. the separation of gas from water, gas liquefaction and storage.
The collection of hydrocarbon gas from the ground surface seeps over the gas hydrate zone.
2. An apparatus for extraction of hydrocarbon gases from under ground porous rock formation with hydro carbon gas hydrate, including: a water source, a water heater system, a pulsatory high pressure water pump, a header, a central water injector, some vertical collector pipes, some holes and evacuation pipes, a water-gas separator system, a gas dryer and liquefaction system and a liquid gas storage.
3. An apparatus, according to claim (2) where the injector is a vertical pipe situated between ground surface and gas hydrate zone bottom which pipe has the wall with holes on the entire height of gas hydrate portion, and with down end with concave cover well connected, but not tight, leaving a small space in between.
4. An apparatus, according to claim (2) where some vertical positioned collector pipes are provided between the ground surface and the bottom of the gas hydrate zone. The pipes have holes on the entire height portion of gas hydrate zone, and are located at a certain distance around of central injector.
5. An apparatus, according to claim (2) where some evacuation holes and pipes vertically positioned between the ground surface and the top of gas hydrate zone, are located at certain distance around the central injector, the holes go between the top and bottom of gas hydrate zone.
6. An apparatus, according to claim (2), which is provided with a high-pressure header and conduits for cleaning of obstruction of the vertical collector, pipes.
7. An apparatus, according to claim (2), which is provided with a surface hydrocarbon gas collection system which includes inverse funnels and pipes.
PCT/RO2006/000008 2006-04-07 2006-04-07 Procedure and apparatus for hydrocarbon gases extraction from under ground hydrates WO2007117167A1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8925632B2 (en) 2010-12-09 2015-01-06 Mgm Energy Corp. In situ process to recover methane gas from hydrates
CN105625998A (en) * 2016-02-02 2016-06-01 西南石油大学 Reverse production method and production equipment for seafloor natural gas hydrate stable layer
CN109488259A (en) * 2018-12-12 2019-03-19 青岛海洋地质研究所 It is handled up the method for replacement exploitation shallow-layer bulk I class hydrate system based on warm seawater-gravel
CN110779768A (en) * 2019-12-05 2020-02-11 苏州冠德能源科技有限公司 Device is got to moisture collection in rock
CN113236192A (en) * 2021-03-31 2021-08-10 中国石油大学(北京) Marine hydrate underwater mining system and method
CN114113440A (en) * 2021-11-19 2022-03-01 中国石油大学(北京) System and method for capturing and analyzing volatile hydrocarbons in natural gas hydrate reservoirs
CN119393098A (en) * 2024-11-04 2025-02-07 重庆大学 A method for high-speed hydrothermal jet crushing and exploitation of marine natural gas hydrate

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US8925632B2 (en) 2010-12-09 2015-01-06 Mgm Energy Corp. In situ process to recover methane gas from hydrates
CN105625998A (en) * 2016-02-02 2016-06-01 西南石油大学 Reverse production method and production equipment for seafloor natural gas hydrate stable layer
CN109488259A (en) * 2018-12-12 2019-03-19 青岛海洋地质研究所 It is handled up the method for replacement exploitation shallow-layer bulk I class hydrate system based on warm seawater-gravel
CN110779768A (en) * 2019-12-05 2020-02-11 苏州冠德能源科技有限公司 Device is got to moisture collection in rock
CN113236192A (en) * 2021-03-31 2021-08-10 中国石油大学(北京) Marine hydrate underwater mining system and method
CN114113440A (en) * 2021-11-19 2022-03-01 中国石油大学(北京) System and method for capturing and analyzing volatile hydrocarbons in natural gas hydrate reservoirs
CN114113440B (en) * 2021-11-19 2023-01-13 中国石油大学(北京) System and method for capturing and analyzing volatile hydrocarbon in natural gas hydrate reservoir
CN119393098A (en) * 2024-11-04 2025-02-07 重庆大学 A method for high-speed hydrothermal jet crushing and exploitation of marine natural gas hydrate

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