CN106499368A - A kind of deep seafloor top layer gas hydrate mining methods - Google Patents
A kind of deep seafloor top layer gas hydrate mining methods Download PDFInfo
- Publication number
- CN106499368A CN106499368A CN201610946867.5A CN201610946867A CN106499368A CN 106499368 A CN106499368 A CN 106499368A CN 201610946867 A CN201610946867 A CN 201610946867A CN 106499368 A CN106499368 A CN 106499368A
- Authority
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- China
- Prior art keywords
- well
- conduit
- injection
- coiled tubing
- gas hydrate
- 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.)
- Granted
Links
- 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 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005065 mining Methods 0.000 title claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 238000005553 drilling Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 150000004677 hydrates Chemical class 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 11
- 238000010494 dissociation reaction Methods 0.000 claims abstract description 8
- 230000005593 dissociations Effects 0.000 claims abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 8
- 241000191291 Abies alba Species 0.000 claims abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 4
- 230000003628 erosive effect Effects 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000005488 sandblasting Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution 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
- E21B43/01—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
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)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention relates to a kind of deep seafloor top layer gas hydrate mining methods, comprise the following steps：S1, injection catheter drilling well；S2, connection wellhead assembly and completion practice：Christmas tree is transferred to seabed by standpipe, and oral with submarine well be attached, coiled tubing carries jetting tool and enters inside pit shaft, to the inside of coiled tubing, injection takes sand flow body at a high speed, formation aperture on conduit is acted on by sand to the erosion of conduit, the communicating passage of pit shaft and stratum is set up, after completing abrasive perforating, completion tool is fetched and is withdrawn coiled tubing；S3, note chemical reagent heat up；S4, production gas hydrates：After gas hydrate dissociation in rock stratum seepage flow, enter under differential pressure action around in producing well well, gathering system is unified to be delivered to production platform by production riser, completes the production work of gas hydrates.It is an advantage of the current invention that：Safe and reliable, efficiency of breaking rock is high, operation is simple, it is adaptable to the non-diagenesis region exploitation of gas hydrates in seabed.
Description
Technical field
The present invention relates to natural gas extraction technical field, particularly a kind of deep seafloor top layer exploitation of gas hydrates side
Method.
Background technology
Gas hydrates possess the advantages of energy density is high, resource reserve is big, and the exploration of hydrate and exploitation become
The study hotspot of scientific circles.Overall hydration goods and materials are accounted for the non-diagenesis hydrate in the seabed of particulate crack type, the presence of decentralized form
More than the 80% of source, prevents which from carrying out mining operations by conventional method the features such as buried depth is shallow, cementing properties is poor.
Existing sea-bottom natural gas exploitation is mostly using hot exploitation, blood pressure lowering exploitation, chemical injection exploitation, CO2Replacement exploitation
Deng conventional recovery method, but the exploitation for the non-diagenesis hydrate layer in seabed, and these conventional recovery methods are all present exploits effect
Rate is low, difficulty is big, high cost the shortcomings of because seabed non-into rock stratum be mostly submarine surface formed tens to one hundred meters of length
Well, using normal recovery method cannot deflecting, cause production zone to be restricted.In addition, sea-bottom shallow stratum is unstable,
Stratum is soft, shakes the larger stratum that easily causes and collapse in recovery process.
Content of the invention
It is an object of the invention to overcoming the shortcoming of prior art, there is provided a kind of safe and reliable, efficiency of breaking rock is high, operation is simple
Single deep seafloor top layer gas hydrate mining methods, it is adaptable to the non-diagenesis region exploitation of gas hydrates in seabed.
The purpose of the present invention is achieved through the following technical solutions：A kind of deep seafloor top layer exploitation of gas hydrates side
Method, comprises the following steps：
S1, injection catheter drilling well：The depth of stratum of design will be entered using injection catheter drilling technology under conduit, sprayed using drill bit
The gravity perforate of water jet and conduit and drilling tool itself, drill bit bottom connect mud motor, and drill bit is when perforate is sprayed
Under enter, sheathed catheter with entering under drill bit and drilling tool, respectively obtains producing well and injection well outside drill bit and drilling tool；
S2, connection wellhead assembly and completion practice：After entering projected depth under conduit, christmas tree is transferred to seabed by standpipe, and
It is attached with the producing well in seabed and the well head head of injection well respectively, coiled tubing carries jetting tool and enters inside pit shaft,
To the inside of coiled tubing, injection takes sand flow body at a high speed, acts on formation aperture on conduit to the erosion of conduit by sand, sets up well
Cylinder and the communicating passage on stratum, after completing abrasive perforating, fetch completion tool and withdraw coiled tubing；
S3, note chemical reagent heat up：Injection well well is connected to production platform by standpipe, by coiled tubing by standpipe from life
Producing platform to enter in injection well well, chemical heating agent being injected inside coiled tubing, heating injection well wellbore rock stratum makes
Gas hydrate dissociation around injection well；
S4, production gas hydrates：Seepage flow, life around entrance under differential pressure action in rock stratum after gas hydrate dissociation
Produce in well well, after entering well, continue, under differential pressure action, to flow up, the day that producing well well is produced by gas transmission line
So gas is collected to gathering system in seabed, and gathering system unification is delivered to production platform by production riser, completes gas water
The production work of compound.
Enter depth of stratum under the conduit within 200 meters.
The well conduit sandblasting operation hole of the injection well is formed at wellbore bottom, the conduit spraying operation of the producing well
Hole is formed at bottom to pit shaft medium position.
The producing well is at least three, and is distributed in around injection well at equal intervals.
The present invention has advantages below：
1st, the present invention is applied to the exploitation of gas hydrates within tens meters to 100 meters of submarine surface, is bored by injection catheter
Well technology will enter the depth of stratum of design using spray regime under conduit, will not cave in because stratum is soft, can be prevented effectively from phase
The generation of pass accident, safe and reliable.
2nd, the gravity perforate of water jet and conduit and drilling tool itself is sprayed using drill bit, under drill bit is when perforate is sprayed
Enter, outside drill bit and drilling tool, with entering under drill bit and drilling tool, drill bit bottom connects mud motor, Neng Gouti to sheathed catheter
The efficiency of breaking rock of high drill bit.
3rd, the present invention adopts drilling tool perforate, while will enter to design depth of stratum under conduit, using injection catheter drilling technology
The foraminate injection well of tool and producing well is respectively obtained, wherein injection well well conduit sandblasting operation hole is formed at wellbore bottom,
Producing well conduit spraying operation hole is formed at bottom to pit shaft medium position, during exploitation, injects chemical heating agent to injection well, changes
Learn intensification agent to flow out from the operation hole of injection bottom so as to the gas hydrate dissociation of surrounding, and seepage flow is to producing well,
Under differential pressure action, producing well is entered, production platform is delivered to by gathering system, whole recovery process operation is simple.
Description of the drawings
Fig. 1 is the schematic diagram for entering conduit under the present invention；
Fig. 2 is the partial schematic diagram in Fig. 1 below stratum；
Fig. 3 is schematic diagram of the present invention by sandblasting operation perforate；
Fig. 4 is the mining system structural representation of the present invention；
In figure：1- production platforms, 2- conduits, 3- drill bits, 4- mud motors, 5- standpipes, 6- well head heads, 7- coiled tubings,
8- jetting tools, 9- injection wells, 10- producing wells, 11- gas transmission lines, 12- gathering systems.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to following institute
State.
A kind of deep seafloor top layer gas hydrate mining methods, comprise the following steps：
S1, injection catheter drilling well：As depicted in figs. 1 and 2, the stratum of design will be entered using injection catheter drilling technology under conduit 2
Depth, enters depth of stratum within 200 meters under conduit 2, the gravity for spraying water jet and conduit 2 and drilling tool itself using drill bit
Perforate, 3 bottom of drill bit connect mud motor 4, drill bit 3 while spray perforate while under enter, conduit 2 is enclosed within outside drill bit and drilling tool
Face, with entering under drill bit and drilling tool, respectively obtains producing well 10 and injection well 9, below injection catheter to mud line during 20m, the pressure of the drill
Control is in 138～180kN, if scope of the pressure of the drill beyond design, just reduces injection catheter bit speed, increase discharge capacity and replace into
Thick bentonite slurry cleaning, or up and down conduit 2, until the pressure of the drill rear continuation injection catheter drilling well in the range of design, right
For injection catheter drilling well, conduit finally in place when the pressure of the drill particularly significant, it is impossible to less than the 80% of maximum the pressure of the drill, can both keep away
Exempt from that pipe string is too pressurized to bend, the full payload that conduit 2 can bear can be caused again to tend to maximum；
S2, connection wellhead assembly and completion practice：As shown in Figure 3 and Figure 4, after entering projected depth under conduit 2, christmas tree is by vertical
Pipe 5 is transferred to seabed, and is attached with the producing well 10 in seabed and the well head head 6 of injection well 9 respectively, and coiled tubing 7 is carried
Jetting tool 8 is entered inside pit shaft, and the injection to the inside of coiled tubing 7 takes sand flow body at a high speed, the erosion of conduit 2 is acted on by sand
Aperture is formed on conduit 2, and the christmas tree includes injection well 9 and producing well 10, wherein 9 well conduit sandblasting operation of injection well
Hole is formed at wellbore bottom, and 10 conduit spraying operation hole of producing well is formed at bottom to pit shaft medium position, the producing well 10
For at least three, and it is distributed in around injection well 9 at equal intervals, sets up the communicating passage of pit shaft and stratum, complete sandblasting and penetrate
After hole, fetch completion tool and withdraw coiled tubing 7；
S3, note chemical reagent heat up：As shown in figure 4,9 well of injection well is connected to production platform 1 by standpipe 5, will continuous oil
Pipe 7 is entered in 9 well of injection well from production platform 1 by standpipe 5, injects chemical heating agent, heating note inside coiled tubing 7
Enter 9 wellbore rock stratum of well, make the gas hydrate dissociation around injection well 9；
S4, production gas hydrates：Seepage flow, life around entrance under differential pressure action in rock stratum after gas hydrate dissociation
Produce in 10 well of well, after entering well, continue, under differential pressure action, to flow up, 10 well of producing well is given birth to by gas transmission line 11
The natural gas of product is collected to gathering system 12 in seabed, and the unification of gathering system 12 is delivered to production platform 1 by standpipe 5, completes
The production work of gas hydrates.
Claims (4)
1. a kind of deep seafloor top layer gas hydrate mining methods, it is characterised in that：Comprise the following steps：
S1, injection catheter drilling well：The depth of stratum of design will be entered using injection catheter drilling technology under conduit, sprayed using drill bit
The gravity perforate of water jet and conduit and drilling tool itself, drill bit bottom connect mud motor, and drill bit is when perforate is sprayed
Under enter, sheathed catheter with entering under drill bit and drilling tool, respectively obtains producing well and injection well outside drill bit and drilling tool；
S2, connection wellhead assembly and completion practice：After entering projected depth under conduit, christmas tree is transferred to seabed by standpipe, and
It is attached with the producing well in seabed and the well head head of injection well respectively, coiled tubing carries jetting tool and enters inside pit shaft,
To the inside of coiled tubing, injection takes sand flow body at a high speed, acts on formation aperture on conduit to the erosion of conduit by sand, sets up well
Cylinder and the communicating passage on stratum, after completing abrasive perforating, fetch completion tool and withdraw coiled tubing；
S3, note chemical reagent heat up：Injection well well is connected to production platform by standpipe, by coiled tubing by standpipe from life
Producing platform to enter in injection well well, chemical heating agent being injected inside coiled tubing, heating injection well wellbore rock stratum makes
Gas hydrate dissociation around injection well；
S4, production gas hydrates：Seepage flow, life around entrance under differential pressure action in rock stratum after gas hydrate dissociation
Produce in well well, after entering well, continue, under differential pressure action, to flow up, the day that producing well well is produced by gas transmission line
So gas is collected to gathering system in seabed, and gathering system unification is delivered to production platform by production riser, completes gas water
The production work of compound.
2. a kind of deep seafloor top layer gas hydrate mining methods according to claim 1, it is characterised in that：Described lead
Enter depth of stratum under pipe within 200 meters.
3. a kind of deep seafloor top layer gas hydrate mining methods according to claim 1, it is characterised in that：The note
The well conduit sandblasting operation hole for entering well is formed at wellbore bottom, and the conduit spraying operation hole of the producing well is formed at bottom and arrives
Pit shaft medium position.
4. a kind of deep seafloor top layer gas hydrate mining methods according to claim 1, it is characterised in that：The life
It is at least three to produce well, and is distributed in around injection well at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610946867.5A CN106499368B (en) | 2016-10-26 | 2016-10-26 | A kind of deep seafloor surface layer gas hydrate mining methods |
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|---|---|---|---|
| CN201610946867.5A CN106499368B (en) | 2016-10-26 | 2016-10-26 | A kind of deep seafloor surface layer gas hydrate mining methods |
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| CN106499368A true CN106499368A (en) | 2017-03-15 |
| CN106499368B CN106499368B (en) | 2019-01-11 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019010908A1 (en) * | 2017-07-14 | 2019-01-17 | 中国矿业大学 | Fluidized mining method of combustible ice through rotary spraying and pressure relief |
| CN109695441A (en) * | 2017-10-23 | 2019-04-30 | 大庆东油睿佳石油科技有限公司 | A kind of method of parallel water horizontal well microwave heating exploitation of gas hydrate |
| CN110017120A (en) * | 2019-04-02 | 2019-07-16 | 中国地质科学院勘探技术研究所 | A kind of method of construction of vertical well shaft bottom high intensity chamber |
| CN110043190B (en) * | 2019-04-02 | 2020-08-18 | 中国地质科学院勘探技术研究所 | Method for building vertical well large-diameter chamber |
| CN111648749A (en) * | 2020-07-09 | 2020-09-11 | 中国海洋石油集团有限公司 | Seabed shallow surface layer natural gas hydrate mobile vertical pipe type mining system and mining method |
| WO2020206878A1 (en) * | 2019-04-08 | 2020-10-15 | 中国石油大学(华东) | Device and working method for drilling hydrate micro-borehole and rapidly performing well completion |
| CN113006744A (en) * | 2021-04-30 | 2021-06-22 | 刘刚 | Well drilling method and well drilling equipment suitable for natural gas hydrate stratum |
| CN114109359A (en) * | 2021-11-16 | 2022-03-01 | 广州海洋地质调查局 | Application method of sea-bottom hydrate reservoir vertical content distribution accurate evaluation device |
| CN115217446A (en) * | 2021-04-21 | 2022-10-21 | 中石化石油工程技术服务有限公司 | Resource exploitation method and device |
| US20230392480A1 (en) * | 2020-12-18 | 2023-12-07 | Fu Zhou University | Self-entry exploitation device and method for marine natural gas hydrates |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019010908A1 (en) * | 2017-07-14 | 2019-01-17 | 中国矿业大学 | Fluidized mining method of combustible ice through rotary spraying and pressure relief |
| CN109695441A (en) * | 2017-10-23 | 2019-04-30 | 大庆东油睿佳石油科技有限公司 | A kind of method of parallel water horizontal well microwave heating exploitation of gas hydrate |
| CN110017120A (en) * | 2019-04-02 | 2019-07-16 | 中国地质科学院勘探技术研究所 | A kind of method of construction of vertical well shaft bottom high intensity chamber |
| CN110043190B (en) * | 2019-04-02 | 2020-08-18 | 中国地质科学院勘探技术研究所 | Method for building vertical well large-diameter chamber |
| CN110017120B (en) * | 2019-04-02 | 2021-08-17 | 中国地质科学院勘探技术研究所 | Method for building vertical well bottom high-strength chamber |
| WO2020206878A1 (en) * | 2019-04-08 | 2020-10-15 | 中国石油大学(华东) | Device and working method for drilling hydrate micro-borehole and rapidly performing well completion |
| CN111648749A (en) * | 2020-07-09 | 2020-09-11 | 中国海洋石油集团有限公司 | Seabed shallow surface layer natural gas hydrate mobile vertical pipe type mining system and mining method |
| US20230392480A1 (en) * | 2020-12-18 | 2023-12-07 | Fu Zhou University | Self-entry exploitation device and method for marine natural gas hydrates |
| US12098622B2 (en) * | 2020-12-18 | 2024-09-24 | Fu Zhou University | Self-entry exploitation device and method for marine natural gas hydrates |
| CN115217446B (en) * | 2021-04-21 | 2024-03-29 | 中石化石油工程技术服务有限公司 | Resource exploitation method and device |
| CN115217446A (en) * | 2021-04-21 | 2022-10-21 | 中石化石油工程技术服务有限公司 | Resource exploitation method and device |
| CN113006744A (en) * | 2021-04-30 | 2021-06-22 | 刘刚 | Well drilling method and well drilling equipment suitable for natural gas hydrate stratum |
| CN114109359B (en) * | 2021-11-16 | 2022-06-17 | 广州海洋地质调查局 | Application method of sea-bottom hydrate reservoir vertical content distribution accurate evaluation device |
| CN114109359A (en) * | 2021-11-16 | 2022-03-01 | 广州海洋地质调查局 | Application method of sea-bottom hydrate reservoir vertical content distribution accurate evaluation device |
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| CN106499368B (en) | 2019-01-11 |
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