CA2818380A1 - Method and system for the dissassociation and production of a gas hydrate formation (ghf) - Google Patents
Method and system for the dissassociation and production of a gas hydrate formation (ghf) Download PDFInfo
- Publication number
- CA2818380A1 CA2818380A1 CA2818380A CA2818380A CA2818380A1 CA 2818380 A1 CA2818380 A1 CA 2818380A1 CA 2818380 A CA2818380 A CA 2818380A CA 2818380 A CA2818380 A CA 2818380A CA 2818380 A1 CA2818380 A1 CA 2818380A1
- Authority
- CA
- Canada
- Prior art keywords
- formation
- gas hydrate
- production
- ghf
- water
- 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.)
- Abandoned
Links
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 39
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 230000000638 stimulation Effects 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 206010017076 Fracture Diseases 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A method and system for the production of a gas hydrate formation (GHF) including the drilling into the subterranean GHF
and lower water-producing formation, fracture stimulation of the GHF and production of the GHF by means of lowering the wellbore pressure while also producing a lower water bearing formation to heat the GHF, both to promote the disassociation of the GHF.
and lower water-producing formation, fracture stimulation of the GHF and production of the GHF by means of lowering the wellbore pressure while also producing a lower water bearing formation to heat the GHF, both to promote the disassociation of the GHF.
Description
SPECIFICATION
This invention is related to a method and system for producing subterranean or subsea gas hydrate reservoirs/formations.
A gas hydrate is a crystalline solid where gas molecules in combination with ice molecules form a cage like structure, trapping the gas inside the ice as a solid. This invention primarily relates to the production of methane gas from methane hydrate.
Methane hydrate formations exist in permafrost regions of the world where temperatures are cold in shallow formations as well as beneath and on the ocean floor where pressures are high and temperatures cold.
Current methods of production from gas hydrate wells aren't economical as production rates aren't high enough, relative to other conventional and unconventional hydrocarbon reservoirs when compared to the capital expenditure of these wells.
It is common for methane hydrate wells to use pumps to depressurize the formation and allow disassociation of the water and methane. This is effective but not effective enough to make the production from the wells economical at current market prices. There are two main problems with the current depressurization method. One is that it doesn't allow a large enough surface area of the reservoir/formation to be exposed to the lower pressure from the operation of the pump. Secondly, the disassociation of methane hydrate to liquid water and gaseous methane is an endothermic reaction, which increases the difficulty of disassociation as more gas is freed.
These disadvantages of the current methods may be overcome by performing a multistage fracture treatment on the gas hydrate reservoir that increases the wellbore surface area with the formation/reservoir as well as having the same gas hydrate well producing warm water from a second deeper reservoir/formation.
This patent involves drilling and installing a horizontal or deviated well (1) into the gas hydrate reservoir/formation (2) to maximize the producible length of wellbore. The wellbore then drops into a lower formation (3) that can produce warm water. A multistage fracture treatment (4) then will be performed to the hydrate reservoir using a fluid that will not freeze at the reservoir's temperature and pressure, this step is important is it will increase the surface area of the reservoir/formation that will have its pressure interface controlled by a pump (5) installed in the wellbore. The pump is then installed and operated lowering the pressure of the wellbore and formations/reservoirs below the pump allowing fluids to be produced from the wellbore.
Warm water (10) will flow through the portion of the wellbore (7) that extends into the water producing formation (6) while formation(s) (8) act as a barrier between the water producing formation (6) and the gas hydrate formation (9). The warm water will heat the gas hydrate formation in order to increase disassociation of the gas hydrate formation. The pump (11) will lower the pressure of both the water producing formation and the gas hydrate formation, driving the flow of fluids from both formations while also disassociating the gas and hydrate. The gas hydrate formation will have a large interface with the wellbore and any pressure drops from the operation of the pump (11) due to the hydraulic fractures (12) that were placed in the formation. Flow (10) is mainly warm water, while flow (13) and (15) is warm water from the water producing formation, water from the gas hydrate formation and gas from the methane hydrate formation. Formation(s) (14) are overburden layers above the gas hydrate formation.
This invention is related to a method and system for producing subterranean or subsea gas hydrate reservoirs/formations.
A gas hydrate is a crystalline solid where gas molecules in combination with ice molecules form a cage like structure, trapping the gas inside the ice as a solid. This invention primarily relates to the production of methane gas from methane hydrate.
Methane hydrate formations exist in permafrost regions of the world where temperatures are cold in shallow formations as well as beneath and on the ocean floor where pressures are high and temperatures cold.
Current methods of production from gas hydrate wells aren't economical as production rates aren't high enough, relative to other conventional and unconventional hydrocarbon reservoirs when compared to the capital expenditure of these wells.
It is common for methane hydrate wells to use pumps to depressurize the formation and allow disassociation of the water and methane. This is effective but not effective enough to make the production from the wells economical at current market prices. There are two main problems with the current depressurization method. One is that it doesn't allow a large enough surface area of the reservoir/formation to be exposed to the lower pressure from the operation of the pump. Secondly, the disassociation of methane hydrate to liquid water and gaseous methane is an endothermic reaction, which increases the difficulty of disassociation as more gas is freed.
These disadvantages of the current methods may be overcome by performing a multistage fracture treatment on the gas hydrate reservoir that increases the wellbore surface area with the formation/reservoir as well as having the same gas hydrate well producing warm water from a second deeper reservoir/formation.
This patent involves drilling and installing a horizontal or deviated well (1) into the gas hydrate reservoir/formation (2) to maximize the producible length of wellbore. The wellbore then drops into a lower formation (3) that can produce warm water. A multistage fracture treatment (4) then will be performed to the hydrate reservoir using a fluid that will not freeze at the reservoir's temperature and pressure, this step is important is it will increase the surface area of the reservoir/formation that will have its pressure interface controlled by a pump (5) installed in the wellbore. The pump is then installed and operated lowering the pressure of the wellbore and formations/reservoirs below the pump allowing fluids to be produced from the wellbore.
Warm water (10) will flow through the portion of the wellbore (7) that extends into the water producing formation (6) while formation(s) (8) act as a barrier between the water producing formation (6) and the gas hydrate formation (9). The warm water will heat the gas hydrate formation in order to increase disassociation of the gas hydrate formation. The pump (11) will lower the pressure of both the water producing formation and the gas hydrate formation, driving the flow of fluids from both formations while also disassociating the gas and hydrate. The gas hydrate formation will have a large interface with the wellbore and any pressure drops from the operation of the pump (11) due to the hydraulic fractures (12) that were placed in the formation. Flow (10) is mainly warm water, while flow (13) and (15) is warm water from the water producing formation, water from the gas hydrate formation and gas from the methane hydrate formation. Formation(s) (14) are overburden layers above the gas hydrate formation.
Claims (3)
1. A method for the production of a gas hydrate reservoir consisting of the following steps:
a. Drilling and installing a horizontal or deviated well into a subterranean or subsea gas hydrate formation which then drops and extends into a lower formation which is able to produce warm water.
b. Performing a multistage hydraulic fracturing operation on the gas hydrate reservoir with a fluid that does not freeze at the reservoir properties.
c. Lowering the pressure on the gas hydrate formation and water producing formation by means of a pump.
d. Heating the gas hydrate formation by allowing water production from a lower formation.
e. Allowing water and gas to flow from the well and be recovered.
a. Drilling and installing a horizontal or deviated well into a subterranean or subsea gas hydrate formation which then drops and extends into a lower formation which is able to produce warm water.
b. Performing a multistage hydraulic fracturing operation on the gas hydrate reservoir with a fluid that does not freeze at the reservoir properties.
c. Lowering the pressure on the gas hydrate formation and water producing formation by means of a pump.
d. Heating the gas hydrate formation by allowing water production from a lower formation.
e. Allowing water and gas to flow from the well and be recovered.
2. A method for the production of a gas hydrate reservoir as defined in claim 1 in which the said step of lowering the pressure on the gas hydrate formation by means of a pump comprises:
a. Pumping water and/or hydrocarbons from the well.
a. Pumping water and/or hydrocarbons from the well.
3. A method for the production of a gas hydrate reservoir as defined in claim 2 and further comprising the step of reintroducing produced water into the water producing formation by means of a separate well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2818380A CA2818380A1 (en) | 2013-08-12 | 2013-08-12 | Method and system for the dissassociation and production of a gas hydrate formation (ghf) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2818380A CA2818380A1 (en) | 2013-08-12 | 2013-08-12 | Method and system for the dissassociation and production of a gas hydrate formation (ghf) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2818380A1 true CA2818380A1 (en) | 2014-06-05 |
Family
ID=50877757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2818380A Abandoned CA2818380A1 (en) | 2013-08-12 | 2013-08-12 | Method and system for the dissassociation and production of a gas hydrate formation (ghf) |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2818380A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298463A (en) * | 2015-11-11 | 2016-02-03 | 中国石油大学(华东) | Completion method for natural-gas-hydrate large-borehole and multi-branch-radial-horizontal-borehole well |
| CN109736754A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using hot dry rock exploitation of gas hydrate |
| CN109736753A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using individual well jointly pressure type underground heat exploitation of gas hydrate |
| CN111734358A (en) * | 2020-06-29 | 2020-10-02 | 陕西工业职业技术学院 | Comprehensive exploitation method for combustible ice in frozen soil area |
| US11499407B2 (en) * | 2020-02-28 | 2022-11-15 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Exploiting structure for natural gas hydrate reservoir and exploiting method for natural gas hydrate by injecting hydraulic calcium oxide via gas fracturing |
-
2013
- 2013-08-12 CA CA2818380A patent/CA2818380A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298463A (en) * | 2015-11-11 | 2016-02-03 | 中国石油大学(华东) | Completion method for natural-gas-hydrate large-borehole and multi-branch-radial-horizontal-borehole well |
| CN109736754A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using hot dry rock exploitation of gas hydrate |
| CN109736753A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using individual well jointly pressure type underground heat exploitation of gas hydrate |
| US11499407B2 (en) * | 2020-02-28 | 2022-11-15 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Exploiting structure for natural gas hydrate reservoir and exploiting method for natural gas hydrate by injecting hydraulic calcium oxide via gas fracturing |
| CN111734358A (en) * | 2020-06-29 | 2020-10-02 | 陕西工业职业技术学院 | Comprehensive exploitation method for combustible ice in frozen soil area |
| CN111734358B (en) * | 2020-06-29 | 2021-12-07 | 陕西工业职业技术学院 | Comprehensive exploitation method for combustible ice in frozen soil area |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20160812 |