CN1685131A - Method and system for accessing subterranean deposits - Google Patents
Method and system for accessing subterranean deposits Download PDFInfo
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- CN1685131A CN1685131A CNA038229420A CN03822942A CN1685131A CN 1685131 A CN1685131 A CN 1685131A CN A038229420 A CNA038229420 A CN A038229420A CN 03822942 A CN03822942 A CN 03822942A CN 1685131 A CN1685131 A CN 1685131A
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- well bore
- subterranean zone
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/14—Obtaining from a multiple-zone well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/006—Production of coal-bed methane
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Abstract
A system for accessing a subterranean zone from the surface includes a first, second and third entry well bore extending from the surface, the first, second and third entry well bores located on the same drilling pad at the surface. A slanted well bore extends from each of the entry well bores to the subterranean zone. A substantially horizontal drainage pattern extends from the slanted well bores into the subterranean zone.
Description
Technical field of the present invention
The present invention relates generally to the system and method that is used for recovery of subterranean resources, relates in particular to the system and method that is used to reach subsurface formations.
Background of the present invention
Underground coal deposit contains a large amount of methane gass.For many years, exploiting limitedly and utilizing methane gas from coal deposit always.But, have various serious obstacles to influence the more extensive exploitation and the application of the methane gas reserves in the coal seam always.Matter of utmost importance in the methane gas exploitation in the coal seam is: may stretch and reach several thousand acres big zone in the coal seam, but the coal seam is but quite thin, may have only several inches to several meters.The vertical shaft that is used to exploit methane gas that gets into coal deposit can only collect in the coal deposit zone methane gas in the quite little radius.And, for coal deposit, should not adopt pressure breaking method and other method of being generally used for increasing from the methane gas yield of lithostratigraphy.Therefore, in case from the vertical shaft (well bore) that gets into the coal seam when having exploited out the methane gas that collects easily further yield just limited.In addition, underground water must be discharged often with underground water and deposit from the coal seam in order to exploit methane gas in the coal seam.
For the bigger zone that makes the coal seam is exposed to pit shaft so that gather more gas, attempting the horizontal drilling mode always.But this horizontal drilling technology need be with there being the curved pit shaft of arc, and this pit shaft is difficult to discharge the water of mailing in the coal seam.Extracting the most effectual way of the water in the underground pit shaft out, that is a kind of deep well piston pump, in the pit shaft that arc level or little is bent, can not work well.
With the pit shaft of single inclination with deep well piston pump draining effectively, and the advantage that absorbs the horizontal well system, and don't be limited in the drainage pattern (drainage pattern) of target area employing level.
General introduction of the present invention
The invention provides a kind of well system and method that is used for reaching from ground the inclination of subterranean zone, it can eliminate or reduce shortcoming and the problem that exists in the system and method for prior art basically.Particularly, several embodiments of the present invention provide the methane gas in a kind of working seam effectively and discharge the well system and method for the phreatic inclination in the coal seam, and don't need adopt excessively arc curved or use articulated well bore, do not need the very big ground region of usefulness to carry out drillng operation yet.
According to one embodiment of the present of invention, a kind of system that is used for reaching from ground subterranean zone comprises first, second and the triple feed inlet pit shaft (entry well bore) that faces down from ground and to extend, and first, second and triple feed inlet the pit shaft distance between mutually on the ground are no more than 1000 feet.From first, second and triple feed inlet pit shaft each is extended with the pit shaft of an inclination to subterranean zone.Be extended with the drainage pattern of an approximate horizontal to subterranean zone from each slanted well bore.
According to another embodiment of the present invention, a kind of method that is used for reaching from ground subterranean zone comprises constructs three or more close entry well bores and constructs a plurality of slanted well bores from each entry well bore to subterranean zone.This method also comprises from each slanted well bore to cave that subterranean zone is constructed several drainage pattern and constructed enlarged at each slanted well bore.
Various embodiments of the present invention have one or more technical advantages.These advantages are: construct three or more entry well bore, a plurality of slanted well bore and a plurality of drainage patterns adjacent to each other, can carry out optimized collection to gas in the subterranean zone and liquid resource.This makes and can carry out more effective drilling well and exploitation, reduces cost of winning greatly, and avoids the problem that exists in other system and method.Another technical advantages is: a kind of method that reaches subterranean zone from ground with a plurality of slanted well bores that have the cave of one or more enlarged is provided.The cave of each enlarged can make from the upwards flow velocity reduction of mobile gas of slanted well bore, and this helps to remove the liquid of carrying under one's arms in the gas and can take out resource from subterranean zone best.
Those skilled in the art that can find out technical other advantage of the present invention significantly from following accompanying drawing, explanation and claim.
Brief Description Of Drawings
For a better understanding of the present invention and advantage, describe with reference to the accompanying drawings, the similar similar label of part in each accompanying drawing, in each accompanying drawing:
Fig. 1 represents to be used to exploit an exemplary slant entry well system of the resource of a subterranean zone;
Fig. 2 A represents to be used to exploit a silo system of the resource of a subterranean zone;
Fig. 2 B expresses the part of an exemplary slant entry well system in more detail;
Fig. 3 represents to be used for a water in the recovery of subterranean structure and an exemplary method of gas;
Fig. 4 represents an exemplary entry well bore;
Fig. 5 represents to comprise the application of an example system of an entry well bore and a slanted well bore;
Fig. 6 represents to comprise an example system of an entry well bore and a slanted well bore;
Fig. 7 represents to comprise a slanted well bore and an example system with articulated well bore;
Fig. 8 represents with an exemplary slant entry well system production of water and a gas
Fig. 9 represents the exemplary drainage pattern that slant entry well system adopts.
Detailed description of the present invention
Fig. 1 expresses the exemplary slant entry well system that is used for reaching from ground a subterranean zone.Among this embodiment that will illustrate below, subterranean zone is a coal seam.Be appreciated that with slant entry well system of the present invention and can reach other subsurface structure and/or zone similarly, take out and/or exploit water, hydrocarbon and other fluid in this zone, before mining operations, handle mineral, liquid, gas or other material are injected or import this zone, or be used for any other suitable purpose.
With reference to Fig. 1, slant entry well system 10 comprises entry well bore 15, slant well 20, articulated well bore 24, cave 26 and " mouse hole " 27.Entry well bore 15 11 extends to subterranean zone 22 from ground.Slant well 20 extends to subterranean zone 22 in an end from the tube of each entry well bore 15, certainly slant well 20 or also can extend out from arbitrary other suitable part of entry well bore 15.With regard to used here, " each " is meant the subsystem that all are specific.Have under the situation of a plurality of subterranean zone 22 at each different degree of depth place, as in an example shown, slant well 20 extends to pass successively apart from nearest mineral reserve zone 22, ground and finally reaches apart from mineral reserve zone 22 farthest, ground.Articulated well bore 24 can extend to each subterranean zone 22 from each slant well 20.Can one or more caves 26 be set along a slant well 20, and a cave 26 and " a mouse hole " 27 be set in the bottom of each slant well 20.
In Fig. 1 and 4-8, it is vertical basically that entry well bore 15 is expressed as, and still, is appreciated that entry well bore 15 can have any suitable angle with respect to ground 11, with the landform that adapts to ground and the geometry or the form of landforms and/or a slice subterranean resource.In an illustrated embodiment, 20 pairs of entry well bores 15 of each slant well have an angle α, and it is about 20 ° in an illustrated embodiment.Be appreciated that 20 pairs of entry well bores 15 of each slant well can have other angle, with landform that adapts to ground and the other factors that is similar to those factors that influence entry well bore 15.In an illustrated embodiment, each slant well 20 mutually between with about 60 ° angle separately.Be appreciated that between each slant well 20 it also can is other angle, this depends on the landform and the geography of the zone and the position of target coal seam 22.
Each entry well bore 15 is arranged as on the ground at a distance of the β foot.In an illustrated embodiment, each entry well bore 15 is about 20 feet apart.Be appreciated that each entry well bore 15 can have other spacing, with the landform that adapts to ground and/or the geometry or the form of subterranean resource.
In certain embodiments, the spacing of each entry well bore 15 can be between 2 feet to 100 feet.In certain embodiments, each entry well bore 15 can be on the same drilling platform.With regard to the usage here, " on same drilling platform " is meant that the drillng operation of each well carries out in same drilling well place.In certain embodiments, each entry well bore 15 can be close together.With regard to the usage here, " close " is meant on same drilling platform.
Each cave 26 can be arranged in the top of one or more articulated well bores 24 along slant well 20 compartment of terrains.For example, a cave 26 can be set above each articulated well bore 24.Each cave 26 also can be arranged as the junction near slant well 20 and articulated well bore 24.With regard to the usage here, " approaching " just be meant on the junction of slant well 20 and articulated well bore 24, under or its place.Being appreciated that also can be with other suitable distance, to adapt to for example geometry of underground soil layer and the geometry or the form of form and/or subterranean resource.Slant well 20 can also comprise the cave 26 and/or " the mouse hole " 27 that are arranged on its bottom.Slant well 20 can comprise one group or two groups of caves 26 and " mouse hole " 27, also can not comprise them.
Fig. 2 A and 2B express the advantage of the slant well 20 at oblique angle with respect to vertical shaft with way of contrast.With reference to Fig. 2 A, vertically pit shaft 30 is expressed as an articulated well bore 32 that extends to 22 li in coal seam.As shown in the figure, 22 fluids that collect 32 li of articulated well bores must flow up into vertical pit shaft 30 along articulated well bore 32 from the coal seam, and their will pass by distances of approximate w foot just can enter vertical pit shaft 30.The distance of this w foot is commonly known as hydrostatic head (hydrostatic hesd), must make fluid overcome this hydrostatic head and it could be collected 30 li in vertical pit shaft.Contrast 2B with the aid of pictures, a slant well 34 is expressed as an articulated well bore 36 that extends to 22 li in coal seam.Slant well 34 is expressed as with respect to vertical an angle [alpha].As shown in the figure, 22 fluids of collecting must upwards enter slant well 34 along articulated well bore 36 from the coal seam, and it passes by vertical apart from w ' foot.Like this, compare with vertical basically system, the hydrostatic head of slant entry well system has reduced.And, because slant well 34 has inclined angle alpha, compare with the articulated well bore 32 of vertical pit shaft 30, from the point of contact or the articulated well bore 36 that gets out of branch point 38 bigger bend radius is arranged.This makes articulated well bore 36 to grow (drill string can reduce the frictional force of sweep) than articulated well bore 32, thereby articulated well bore 36 pierces into the length in coal seam 22 than growing and can gathering more coal bed gas.
Fig. 3 expresses the illustrative methods that is drilled to a slant well 20.Each step among Fig. 3 will further expression in Fig. 4-8.This method is from constructing the step 100 of entry well bore.In step 105, a fresh water sleeve pipe or other suitable sleeve pipes are put into the entry well bore that is built in step 100, on the throne at the internal reinforcement of the entry well bore of step 100 in step 110 the fresh water sleeve pipe.
In step 115, a drill string is injected entry well bore, and pass sleeve pipe with it and creep into about 50 feet downwards.In certain embodiments, construct the curved pit shaft of arc of a weak point.In certain embodiments, the curved pit shaft of arc can be 200 feet long and turn 35 ° on its whole length.Be appreciated that the length and the angle that also can adopt other according to the geology and the landform of locality.In step 120 drilling tool is oriented to desirable slant well angle, slanted well bore is crept into and passes the target subterranean zone downwards in step 125.On slanted well bore, construct one or more caves in step 130.
In step 135 the slant well sleeve pipe is installed.Then, creep into the crooked pit shaft of a short radius to target coal seam in step 140.Then, bore the pit shaft of an approximate horizontal along the coal seam in step 145.Be appreciated that the variation of considering bearing, the pit shaft of approximate horizontal may need to depart from the orientation of level.Then, in the coal seam, creep into a drainage pattern in step 150 from the pit shaft of approximate horizontal.This drainage pattern can comprise the pattern of pinniform, pattern or other appropriate mode of crow pin shape.Step 155 in that needs make a decision for example exists under the situation in zone, a plurality of coal seam at the different depth place of underground, should determine whether to exploit additional zone, coal seam.If gather the gas in additional zone, coal seam, can repeat step 140 to 155 for each additional zone, coal seam.If do not want to gather the gas in additional zone, coal seam, process just proceeds to step 160.
In the step 160 that needs make a decision, should determine whether need to bore additional slant well.Bore additional slant well if desired, process will be got back to step 100 and repeat to step 155 always along "Yes" branch.Can construct an independent entry well bore for each slanted well bore.Like this, for each slant well, process all is from step 100, bores a roughly vertical pit shaft in this step.But, in certain embodiments, can get out the well of a plurality of inclinations from an entry well bore.
If do not need to bore additional slant well, process will proceed to step 165 along "No" branch.
In step 165 mining equipment is installed in each slant well, and exploits water outlet and gas from the subterranean coal zone in step 170, thus terminal procedure.
Though each step has been described in sequence, has been appreciated that these steps can carry out with any other suitable order.If suitably, can omit one or more steps, also can add some steps.
For example, (make a decision) having under the situation of a plurality of target areas, can construct the cave (step 130) of an enlarged above the target area at each boring the curved pit shaft (140) of any short arc before in step 155.Perhaps, in the cave (step 130) of constructing any enlarged before, can all construct the curved pit shaft (step 140) of short arc in each target area.Those skilled in the art that also can make other suitable change.
Fig. 4 expresses the working method of entry well bore 15 and sleeve pipe 44, and it is preparing to bore a slant well 20.Corresponding to the step 100 of Fig. 3, but one of a cast in situs or ready-made cement sleeve pipe 46 is installed.This cement sleeve pipe can be any mixture or material, as long as it can remain on needed position to sleeve pipe 44 with respect to entry well bore 15.Drilling rod 50 is positioned to can begin to bore slant well.In order to keep drilling rod 50, can adopt a stabilizer 52 44 li suitable centerings of sleeve pipe.Stabilizer 52 can be that an endless belt fin type stabilizer (ring and fin type stabilizer) or any other can keep the stabilizer of the centering of drilling rod 50.For making stabilizer 52 be in 15 li one needed degree of depth place of entry well bore, can adopt a stop ring 53.This stop ring 53 can be rubber, metal or any other is applicable to the material of subsurface environment.
Fig. 5 expresses an exemplary slant entry well system 20.Step 115 corresponding to Fig. 3, pit shaft 60 is drilled to about 50 feet of the bottom of passing entry well bore 15 (can certainly get out any other suitable distance), pit shaft 60 outwards bores from sleeve pipe 44, so that reduce magnetic disturbance and improve the ability of driller personnel to required direction guiding drill bit.Such as above in conjunction with Figure 3, pit shaft 60 also can comprise an articulated well bore curved 35 ° of 200 feet length inner arcs.
Corresponding to the step 120 of Fig. 3, drill bit is orientated prepares to bore slanted well bore 64.Corresponding to the step 125 of Fig. 3, slanted well bore 64 gets out and creeps into subterranean zone 22 from the bottom of radius well bore 62.Perhaps, slant well 20 can directly get out from entry well bore 15, and does not comprise tangential pit shaft 60 or radius well bore 62.Also bore " a mouse hole " 66, it is an extension of slanted well bore 64." mouse hole " 66 also can be cave or other suitable structure of an enlarged.Corresponding to the step 130 of Fig. 3, on slanted well bore 64, construct a cave 26.
This cave 26 is used for isolating the liquid that it is carried under one's arms from the gas that will be sent to ground as a velocity reduction chamber (velocity reduction chamber).If closely at least one cave 26 be not set the place of face compared with the most shallow lateral well bore, the liquid of carrying under one's arms in the gas will form mist so, and this mist can make borehole pressure raise.The liquid of carrying under one's arms in the effluent air can make frictional force increase, and produces the back pressure (down-hole pressure) that increases.Gas flow rate is reduced to is lower than the speed that it can carry under one's arms liquid by reducing gas flow rate, just can be liquid from wherein separating.Cave 26 can be reduced to the degree that is enough to isolate the liquid of being carried under one's arms with the flow velocity of gas, thereby makes gas more effectively flow to ground.
In an illustrated embodiment, cave 26 is expressed as just on be used for the predetermined branch point of the curved pit shaft of follow-up short arc.Be appreciated that cave 26 can suitably be arranged on other places.But, also be appreciated that also and can after being drilled to the drainage pattern of level, construct cave 26.
Fig. 6 expresses the location of sleeve pipe in 64 li in the pit shaft that tilts.For the ease of expression, only express a slanted well bore 64.Corresponding to the step 135 of Fig. 3, a whipstock casing (whipstock casing) 70 is installed into slanted well bore 64.In an illustrated embodiment, this whipstock casing 70 comprises a whipstock 72, and it is used for mechanically making drilling rod to point to desirable direction.Be appreciated that and also can adopt other suitable technical method, and, also can use whipstock 72 adopting other suitable when drill bit being orientated the method that can make slanted well bore 64 get into subterranean zone 22.Whipstock casing 70 should be orientated and make whipstock 72 creep into 22 1 desirable degree of depth of subterranean zone with being positioned to make follow-up drill bit.
Fig. 7 expresses whipstock casing 70 and slanted well bore 64 in more detail.As discussed in conjunction with Fig. 6 the front, whipstock casing 70 was positioned to make drilling rod 50 to be oriented in a desirable point of contact or slanted well bore 64 is passed at branch point 38 places 64 li of slanted well bores.This is corresponding to the step 140 of Fig. 3.Drilling rod 50 is used at the point of contact or branch point 38 places drill slanted well bore 64 and form articulated well bore 36.In a particular embodiment, the radius of articulated well bore 36 is about 71 feet, and per 100 feet degree of crook is about 80 °.In same embodiment, slanted well bore 64 departs from vertical with about 10 °.In this embodiment, the hydrostatic head that produces in the exploitation is approximately about 30 feet.Can be with any other suitable radius, flexibility and angle of inclination but be appreciated that also.
Fig. 8 expresses slanted well bore 64 and the articulated well bore 36 after being drilled to articulated well bore 36 with drilling rod 50.In a particular embodiment, can be drilled to the well and the drainage pattern of level subsequently 22 li of subterranean zone, this is by step 145 and 150 expressions of Fig. 3.
With reference to Fig. 8, whipstock casing 70 is arranged on the bottom in " mouse hole " 66 and prepares producing oil and gas.Can be enclosed within on the whipstock casing 70 to prevent to escape into the outside of whipstock casing 70 with a joint ring 74 from the gas of articulated well bore 36 exploitations.Gas port 76 allows escaping gas to enter whipstock casing 70 and is collected on ground to the upper reaches along it.As mentioned above, can be arranged in articulated well bore 36 above 26 li fluid separation applications that effluent air is carried under one's arms in cave of enlarged come out.Along with liquid is separated from gas, liquid along slanted well bore 64 to dirty and be collected in " mouse hole " 66 li." mouse hole " 66 also can comprise the cave (not shown) of an enlarged, in order to collect the liquid that flows down from above.
Pump suction pipe line 78 and immersed pump 80 are used for discharging from subterranean zone 22 by articulated well bore 36 collected water and other liquid.As shown in Figure 9, the liquid articulated well bore 36 of flowing through under the effect of the pressure of 22 li of gravity and subterranean zone enters " mouse hole " 66 along slanted well bore 64.Liquid enters the opening on the whipstock 72 of whipstock casing 70 more therefrom, pump suction pipe line 78 and the immersed pump 80 installed in its place's liquid contact.Immersed pump 80 can be to be suitable for being used in various types of immersed pumps of discharging liquid in the subsurface environment, and immersed pump 80 is pumped into ground to liquid by pump suction pipe line 78.The installation of pump suction pipe line 78 and immersed pump 80 is corresponding to the step 165 of Fig. 3.The exploitation of liquids and gases is corresponding to the step step 170 of Fig. 3.
Fig. 9 expresses one can bore the exemplary drainage pattern 90 that goes from articulated well bore 36 to all directions.On ground, a plurality of entry well bores 15 on a drilling platform (drilling pad) 92 are arranged corresponding to the central authorities of drainage pattern 90.In one embodiment, the spacing of each entry well bore 15 is about 20 feet.Be appreciated that and also can adopt other suitable spacings.
A slant well 20 is connected in an entry well bore 15.As mentioned above, connecting the pit shaft 94 of several approximate horizontal in the bottom of slant well 20, each pit shaft 94 stretches out roughly to form the drainage pattern of " crow pin " shape from each slant well 20.Be appreciated that and also can adopt any other suitable drainage pattern, for example pinniform pattern.In an exemplary embodiment, the horizontal-extending of the pit shaft 94 of each approximate horizontal distance is about 300 feet.In addition, the lateral spacing of the pit shaft 94 of each parallel approximate horizontal is about 800 feet.In this certain embodiments, can reach the collection area that is about 640 acres.
Although with several embodiment the present invention has been described, those skilled in the art that can propose various changes and modification.Therefore should think, the present invention includes those changes and modification in those scopes that belong to claims.
Claims (24)
1. a method that is used for reaching from ground subterranean zone comprises:
Face down from ground and to construct one first entry well bore;
Construct the pit shaft of one or more inclinations to described subterranean zone from described first entry well bore;
Face down from ground and to construct one second entry well bore, on the same drilling platform that this second entry well bore and described first entry well bore rest on the ground;
Construct the pit shaft of one or more inclinations to described subterranean zone from described second entry well bore;
Face down from ground and to construct a triple feed inlet pit shaft, on the same drilling platform that this triple feed inlet pit shaft and described first entry well bore and second entry well bore rest on the ground;
Construct the pit shaft of one or more inclinations to described subterranean zone from described triple feed inlet pit shaft; And
In described subterranean zone, construct the drainage pattern of an approximate horizontal from the pit shaft of each described inclination.
2. the method for claim 1 is characterized in that, the drainage pattern of described level comprises pit shaft and a plurality of lateral bores of going out from the bating of described level of a level that extends out from described slanted well bore.
3. method as claimed in claim 2 is characterized in that, the drainage pattern of described level comprises a crow pin shape figure.
4. method as claimed in claim 2 is characterized in that, described each lateral bores is configured to gather one at least 640 acres subterranean zone.
5. method as claimed in claim 2 is characterized in that, the drainage pattern of described level comprises a pinniform figure.
6. the method for claim 1, it also comprises from described subterranean zone takes resource to deliver to ground by the drainage pattern of described level.
7. the method for claim 1, it also be included on the described subterranean zone near the cave of constructing an enlarged on each slanted well bore at this subterranean zone place.
8. the method for claim 1, it also is included in the cave of constructing an enlarged on each slanted well bore above the drainage pattern of described level.
9. method as claimed in claim 7 is characterized in that, the cave of described enlarged is arranged on the junction near the drainage pattern of described slanted well bore and described approximate horizontal.
10. the method for claim 1 is characterized in that, described first, second and the 3rd each entry well bore spacing between mutually is about 20 feet.
11. the method for claim 1, it also comprises from each described slanted well bore constructs the drainage pattern of one second level to one second subterranean zone.
12. a system that is used for reaching from ground subterranean zone comprises:
First entry well bore that faces down and extend from ground;
Second entry well bore that faces down and extend from ground is on the same drilling platform that this second entry well bore and described first entry well bore rest on the ground;
A triple feed inlet pit shaft that faces down and extend from ground is on the same drilling platform that this triple feed inlet pit shaft and described first entry well bore and second entry well bore rest on the ground;
From described first, second and triple feed inlet pit shaft each extends to one or more slanted well bores of described subterranean zone; And
Extend to the drainage pattern of an approximate horizontal of described subterranean zone from described each slanted well bore.
13. system as claimed in claim 12 is characterized in that, the drainage pattern of described level comprises pit shaft and a plurality of lateral bores of going out from the bating of described level of a level that extends out from described slanted well bore.
14. system as claimed in claim 13 is characterized in that, the drainage pattern of described level comprises a crow pin shape figure.
15. system as claimed in claim 13 is characterized in that, described each lateral bores is configured to gather one at least 640 acres subterranean zone.
16. system as claimed in claim 13 is characterized in that, the drainage pattern of described level comprises a pinniform figure.
17. system as claimed in claim 12, it also comprises a cave near the enlarged on each described slanted well bore of described subterranean zone.
18. system as claimed in claim 12, it also comprises the cave of an enlarged on the pit shaft in each described inclination between the drainage pattern of ground and described level.
19. system as claimed in claim 17 is characterized in that, the cave of described enlarged is arranged on the junction near the drainage pattern of described slanted well bore and described approximate horizontal.
20. system as claimed in claim 12 is characterized in that, described first, second and the 3rd each entry well bore spacing between mutually on the ground are about 20 feet.
21. system as claimed in claim 12, it also comprises a drainage pattern that extends to second approximate horizontal of one second subterranean zone from each described slanted well bore.
22. a system that is used for reaching from ground a subterranean zone comprises:
Three or more the entry well bores that face down and extend from ground;
One or more slanted well bores that extend to described subterranean zone from each described entry well bore;
A drainage pattern that reaches the approximate horizontal in the described subterranean zone from described slanted well bore; And
One on each described one or more slanted well bore and be arranged on cave near the enlarged of the junction of the drainage pattern of described slanted well bore and described approximate horizontal.
23. a system that is used for reaching from ground a plurality of subterranean zone comprises:
Three or more the entry well bores that face down and extend from ground;
One or more slanted well bores that extend to one or more subterranean zone from each described entry well bore;
One or more drainage patterns that reach the approximate horizontal in each described one or more subterranean zone from described slanted well bore; And
One or more on each described slanted well bore and be arranged on cave near the enlarged of the junction of the drainage pattern of described slanted well bore and described one or more approximate horizontal.
24. system as claimed in claim 23 is characterized in that, described three or more entry well bores are on the same drilling platform that rest on the ground.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/227,057 US20040035582A1 (en) | 2002-08-22 | 2002-08-22 | System and method for subterranean access |
| US10/227,057 | 2002-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1685131A true CN1685131A (en) | 2005-10-19 |
| CN100535383C CN100535383C (en) | 2009-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038229420A Expired - Fee Related CN100535383C (en) | 2002-08-22 | 2003-08-21 | Method and system for accessing subterranean deposits |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20040035582A1 (en) |
| EP (1) | EP1546505A2 (en) |
| CN (1) | CN100535383C (en) |
| CA (1) | CA2495985C (en) |
| PL (1) | PL201821B1 (en) |
| WO (1) | WO2004018835A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161440A (en) * | 2013-02-27 | 2013-06-19 | 中联煤层气国家工程研究中心有限责任公司 | Single-well coalbed methane horizontal well system and finishing method thereof |
| CN110073075A (en) * | 2016-10-26 | 2019-07-30 | 杰米·L·戴维斯 | Exploit the cutting method in the vertical and horizontal channel of solid natural resource |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8376052B2 (en) | 1998-11-20 | 2013-02-19 | Vitruvian Exploration, Llc | Method and system for surface production of gas from a subterranean zone |
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2003
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- 2003-08-21 EP EP03793194A patent/EP1546505A2/en not_active Withdrawn
- 2003-08-21 WO PCT/US2003/026124 patent/WO2004018835A2/en active IP Right Grant
- 2003-08-21 CN CNB038229420A patent/CN100535383C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161440A (en) * | 2013-02-27 | 2013-06-19 | 中联煤层气国家工程研究中心有限责任公司 | Single-well coalbed methane horizontal well system and finishing method thereof |
| CN110073075A (en) * | 2016-10-26 | 2019-07-30 | 杰米·L·戴维斯 | Exploit the cutting method in the vertical and horizontal channel of solid natural resource |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2495985A1 (en) | 2004-03-04 |
| AU2003265549A1 (en) | 2004-03-11 |
| US20040035582A1 (en) | 2004-02-26 |
| PL375351A1 (en) | 2005-11-28 |
| PL201821B1 (en) | 2009-05-29 |
| WO2004018835A2 (en) | 2004-03-04 |
| WO2004018835A3 (en) | 2004-03-25 |
| CN100535383C (en) | 2009-09-02 |
| EP1546505A2 (en) | 2005-06-29 |
| CA2495985C (en) | 2008-05-20 |
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