CN104879167A - Method for rebuilding gas storage and layered injection and production system thereof - Google Patents
Method for rebuilding gas storage and layered injection and production system thereof Download PDFInfo
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- CN104879167A CN104879167A CN201510205438.8A CN201510205438A CN104879167A CN 104879167 A CN104879167 A CN 104879167A CN 201510205438 A CN201510205438 A CN 201510205438A CN 104879167 A CN104879167 A CN 104879167A
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- 238000003860 storage Methods 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 16
- 238000002347 injection Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims description 33
- 230000035699 permeability Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 27
- 239000007789 gas Substances 0.000 description 133
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 30
- 239000010410 layer Substances 0.000 description 16
- 239000003345 natural gas Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a method for rebuilding a gas storage and a layered injection and production system, wherein the method for rebuilding the gas storage comprises the following steps: acquiring formation parameters of an oil and gas reservoir; respectively arranging an injection-production gas well and an observation well on the oil-gas reservoir; putting a layered drainage pipe column into the observation well, and perforating on the layered drainage pipe column in a segmented manner according to the formation parameters of the oil and gas reservoir to form a perforation segment; a gas injection and production pipe column is arranged in the gas injection and production well for gas injection; carrying out a small layer test in the observation well to obtain a small layer test result; and determining a gas production layer position according to the small layer test result, and closing the gas production layer position. The method for rebuilding the gas storage and the layered injection and production system can effectively reduce the content of residual water in the oil and gas reservoir and increase the storage capacity of the gas storage.
Description
Technical field
The present invention relates to oil-gas reservoir gas storage reconstruction development field, particularly a kind of method of gas storage reconstruction and demixing injection-production system.
Background technology
Underground natural gas storage tank is a kind of mode of natural gas-storing.General underground natural gas storage tank is in darker underground, finds a complete totally enclosed tectosome, in the way of ground pumping natural gas is injected in this structure and stores.When needed, by producing well, natural gas extraction is transported to user to ground again.It is large that underground natural gas storage tank has gas-storing capacity; Safety factor is high, not easily initiation fire and blast; Good in economic efficiency, gas storage low cost and other advantages compared with metal gas tank.In addition, supply-demand relationship and peak regulation can be coordinated in underground natural gas storage tank, Implementation Strategy deposit, ensure reliability and the continuity of air feed, and the operation optimizing production system and gas line network can be contributed to, for national security and region natural gas motorcar, there is extremely important effect.In existing gas storage reconstruction field, common a kind of mode is reconstruct discarded oil-gas reservoir for gas storage.
General, stratum is grown uneven often, and on the longitudinal reservoir of discarded oil-gas reservoir, the parameter differences such as permeability, degree of porosity is comparatively large, the longitudinal reservoir of usually discarded oil-gas reservoir exists aquifer, such as, is typical for bottom and edge water etc.For the oil-gas reservoir in this type of aquifer, existing reconstruction mode mainly arranges many mouthfuls of note gas recovery wells near oil reservoir top circle in the earth formation, stratum edge is arranged and is observed well, pass through crestal gas injection, edge draining, expects, by gas is injected water layer, with natural gas, water to be extruded into edge, natural gas is made to occupy reservoir space, to realize the dilatation demand of reconstructing underground natural gas storage tank.
But due to the inhomogeneities that stratum is grown, particularly the flowing of gas in oil reservoir is often towards permeability good position motion, when to note in gas recovery well inject natural gas time, probably major part effectively tolerance to enter in stratum below aquifer, cause gas bore into, thus not only waste natural gas, and the water in the middle part of stratum can not be driven to edge, expection setting storage capacity can not be reached.And correspondingly, observe in well drainage procedure in edge, observe well and often occur that gas, water are with producing phenomenon, even an aerogenesis does not produce the phenomenon of water, finally cause note gas recovery well continuous high-pressure effectively not inject, edge is observed a well aerogenesis and is not produced the object that water can not realize effective dilatation.
Summary of the invention
The object of this invention is to provide a kind of method and demixing injection-production system of gas storage reconstruction, effectively can reduce residue water content in oil-gas reservoir, increase the storage capacity of gas storage.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
A method for gas storage reconstruction, it comprises:
Obtain oil-gas reservoir formation parameter;
Described oil-gas reservoir arranges note gas recovery well respectively and observes well;
Enter layering column pipe under in described observation well, and according to described oil-gas reservoir formation parameter, segmenting perforating on described layering column pipe, to form perforated interval;
Enter to note gas production tubing string under in described note gas recovery well, carry out gas injection;
In described observation well, carry out substratum test, obtain substratum test result;
According to described substratum test result, determine gas pay position, and closed.
In a preferred embodiment, described note gas recovery well is arranged on the middle part of oil-gas reservoir; Described observation well is arranged on the edge of oil-gas reservoir, is positioned at around described note gas recovery well.
In a preferred embodiment, described note gas recovery well is horizontal well, and it is along gravity direction, spaced apart according to described oil-gas reservoir formation parameter.
In a preferred embodiment, described layering column pipe perforated interval with meet predetermined permeability and be connected with the substratum of degree of porosity.
In a preferred embodiment, described substratum method of testing comprises:
Described perforated interval is opened in segmentation, and described layering column pipe is connected with predetermined substratum;
Obtain the sample that in described layering column pipe, layering flows into;
According to the character of described sample, obtain substratum test result, to determine to close or open corresponding substratum.
For a demixing injection-production system for the method for gas storage reconstruction, it comprise for the note gas production tubing string of gas injection, gas production and for observing, the layering column pipe of draining,
Described note gas production tubing string is arranged in note gas recovery well, it comprises straight well section and horizontal segment, the first sleeve pipe is provided with in described straight well section, be arranged on the first oil pipe in described first sleeve pipe, and be successively set on storm valve on described first oil pipe, sliding sleeve, packer, blanking plug is located short circuit, short circuit is located in test, described blanking plug is located on the first oil pipe that short circuit and described test be located between short circuit and is provided with multiple through hole;
Described layering column pipe is arranged on to be observed in well, it comprises the second sleeve pipe, be arranged on the second oil pipe in described second sleeve pipe, and be successively set on storm valve on described second oil pipe, at least one sliding sleeve, at least one packer, blanking plug is located short circuit, short circuit is located in test, described second sleeve pipe is provided with perforated interval, and the position of described perforated interval is connected with predetermined substratum.
In a preferred embodiment, the two ends of described storm valve are provided with flowing short circuit, and described flowing short circuit is variable diameters joint, and one end that its diameter is larger is connected with oil pipe, and one end that diameter is less is connected with described storm valve.
In a preferred embodiment, described oil-gas reservoir divide two-layer more than, the packer on described layering column pipe, the quantity of sliding sleeve are consistent with the oil-gas reservoir number of plies.
In a preferred embodiment, the second oil pipe between adjacent two described packers being provided with described sliding sleeve, by opening described sliding sleeve, described layering column pipe can being made to be connected with predetermined substratum.
In a preferred embodiment, described first oil pipe is provided with horn mouth near the lower end of horizontal segment.
The features and advantages of the invention are: the method and the demixing injection-production system that the invention provides a kind of gas storage reconstruction, the method of described gas storage reconstruction is by conjunction with oil-gas reservoir formation parameter, layering column pipe is entered under in described observation well, and according to described oil-gas reservoir formation parameter, segmenting perforating on described layering column pipe, to form perforated interval; And substratum test is carried out in described observation well, obtain substratum test result; According to described substratum test result, determine gas pay position, and closed.Described method can reduce residue water content in oil reservoir pointedly, the storage capacity of effective increase gas storage, and tested by substratum, the utilization rate of the natural gas injected in note gas recovery well can be improved, thus in limited oil reservoir space, realize reducing to greatest extent the object of building Kucheng's basis, be specially adapted to the aquifer such as bottom and edge water, high water-cut reservoir oil reservoir.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method for a kind of gas storage reconstruction in the embodiment of the present invention;
Fig. 2 is a kind of gas storage reconstruction well pattern distribution schematic diagram in the embodiment of the present invention;
Fig. 3 is the flow chart of the method middle small layer test of a kind of gas storage reconstruction in the embodiment of the present invention;
Fig. 4 is a kind of structural representation noting note gas production tubing string in gas recovery well in the embodiment of the present invention;
Fig. 5 is a kind of structural representation observing layering column pipe in well in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is elaborated, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen in the application's claims limited range.
The object of this invention is to provide a kind of method and demixing injection-production system of gas storage reconstruction, effectively can reduce residue water content in oil-gas reservoir, increase the storage capacity of gas storage.
Referring to Fig. 1, is a kind of in embodiment of the present invention flow chart of method of gas storage reconstruction.The method of gas storage reconstruction of the present invention comprises:
S1: obtain oil-gas reservoir formation parameter;
S2: note gas recovery well is set respectively in described oil-gas reservoir and observes well;
S3: enter layering column pipe under in described observation well, and according to described oil-gas reservoir formation parameter, segmenting perforating on described layering column pipe;
S4: enter to note gas production tubing string under in described note gas recovery well, carry out gas injection;
S5: carry out substratum test in described observation well, obtains substratum test result;
S6: according to described substratum test result, determine gas pay position, and closed.
Because stratum is grown uneven often, on the longitudinal reservoir of discarded oil-gas reservoir, the parameter differences such as permeability, degree of porosity is larger, there is aquifer in the longitudinal reservoir of usually discarded oil-gas reservoir, therefore before transformation, needing the formation parameter to obtaining the abandoned oil gas reservoir transformed.Described formation parameter comprises the buried depth, thickness, degree of porosity, permeability, temperature, pressure system, Oil Reservoir Types etc. of oil-gas reservoir.
Referring to Fig. 2, is gas storage reconstruction well pattern distribution schematic diagram a kind of in the embodiment of the present invention.Described note gas recovery well 1 is arranged on the middle part of oil-gas reservoir, and described observation well 2 is arranged on the edge of oil-gas reservoir, is positioned at around described note gas recovery well 1.The number of described note gas recovery well 1 is generally multiple.Described note gas recovery well 1 is horizontal well, and it is along gravity direction, spaced apart according to described oil-gas reservoir formation parameter.Such as according to parameters such as the buried depth of oil reservoir and thickness, the horizontal segment of note gas recovery well 1 is distributed in the predetermined degree of depth.
Described note gas recovery well 1 adopts the relatively existing straight well of horizontal well, is more suitable for oil-gas reservoir originally as the water type oil reservoir such as bottom and edge water, high water-cut reservoir.For bottom and edge water, when utilizing straight well to develop, initial production is higher, but because water-coning phenomena is relatively more serious, and later stage moisture rising is fast, and bottom and edge water edge-bottom water enlivens, stratum ability is many, and pressure drop is little, thus causes the recovery ratio of oil reservoir greatly to reduce.And when utilizing horizontal well to develop, because horizontal well improves oil well output by expanding oil reservoir drainage area, well yield can be increased substantially, realize few well high yield and oil reservoir ultimate recovery can be improved, increasing recoverable reserves.Especially, in the process of application level well technology exploitation bottom and edge water, it effectively can control edge-bottom water, to reach the object of this kind of oil reservoir of high-efficiency mining.
The perforated interval of described layering column pipe be positioned at meet predetermined permeability and degree of porosity substratum on, the perforation of described layering column pipe can be connected with the substratum of degree of porosity with meeting predetermined permeability.
By known reservoir formation parameter, determine the particular location of layering column pipe perforation.Concrete, because oil reservoir itself can not be grown completely, may exist disconnected every interlayer between each oil reservoir, perforation can be carried out according to every interlayer segmentation.
By arranging packer by described perforated interval packing between the layering column pipe of described observation well 2 and its inside.Correspondingly, position corresponding with described perforated interval on described layering column pipe, is provided with the switch that described layering column pipe can be connected with the oil jacket annular space of described observation well.Described switch is generally the sliding sleeve be connected on oil pipe.Described sliding sleeve can realize repeatedly opening and closing oil jacket annular space.
In described observation well 2, carry out substratum test, obtain substratum test result.Concrete, refer to Fig. 3, the flow chart of a kind of method middle small layer test of gas storage reconstruction in the embodiment of the present invention.Described substratum method of testing comprises:
S51: described perforated interval is opened in segmentation, makes described layering column pipe be connected with predetermined substratum;
S52: obtain the sample that in described layering column pipe, layering flows into;
S53: according to the character of described sample, obtains substratum test result, to determine to close or open corresponding substratum.
If when described sample is mainly water, make described layering column pipe and described predetermined substratum keep connected state, be beneficial to the water in oil reservoir to discharge from described observation well, be beneficial to the storage capacity effectively expanding gas storage.When described sample is mainly gas, closes sliding sleeve, make described layering column pipe and the packing of predetermined substratum phase, thus the natural gas that saving is injected from note gas recovery well, improve its utilization rate.
The demixing injection-production system of a kind of method for described gas storage reconstruction of proposition that the present invention is also corresponding, it comprise for the note gas production tubing string of gas injection, gas production and for observing, the layering column pipe of draining.
Refer to Fig. 4, note in gas recovery well for a kind of in the embodiment of the present invention structural representation noting gas production tubing string.Described note gas production tubing string ensures as gas storage carries out normal gas injection, gas production and the down-hole string that designs.
Described note gas production tubing string is arranged on interior it of note gas recovery well 1 and comprises straight well section 10 and horizontal segment 101, the first sleeve pipe 1A is provided with in described straight well section 10, be arranged on the first oil pipe 1B in described first sleeve pipe 1A, and be successively set on flowing short circuit 11 on described first oil pipe 1B, storm valve 12, sliding sleeve 13, packer 14, blanking plug is located short circuit 15, short circuit 17 is located in test, described blanking plug is located on the first oil pipe 1B that short circuit 15 and described test be located between short circuit 17 and is provided with multiple through hole 16.
Described flowing short circuit 11 specifically can be variable diameters joint.It can be arranged on the two ends of described storm valve 12, and point other one end is connected with oil pipe, and the other end is connected with described storm valve 12.The described one end internal diameter that with first oil pipe 1B be connected relative to one end that described storm valve 12 connects is little, and it can prevent described storm valve 12 by erosion under undergauge effect, thus can protect described storm valve 12, extends its application life.
Described storm valve 12 is the automatic downhole closing device of the one controlled by liquid controling pipe line 120, in gas well gas production, it can occur that abnormal pressure needs to realize automatic closing well during closing well.
Described sliding sleeve 13, for opening the oil jacket annular space that the first sleeve pipe 1A and described first oil pipe 1B is formed, so that the instrument entered under carrying out in described oil jacket annular space; Or replace into casing protection liquid at described oil jacket annular space Inner eycle; Or need replacing top tubing string to carry out kill-job cycle operation in the later stage.Described sliding sleeve 13 can be circulation slide sleeve, can repeatedly open or close described oil jacket annular space.
Described packer 14, bears the downhole tool of high pressure for avoiding oil jacket annular space on packer 14.Concrete, described packer 14 is desirable packer.
Described blanking plug is located short circuit 15, for auxiliary packer 14 carries out a downhole tool suppressing when setting.Concrete, it is the downhole tool with interior step surface, and described step surface is used for and blanking plug matches.Suppress when setting, blanking plug is thrown and is located on short circuit 15 to described blanking plug, carry out suppressing operation with closed oil pipe.
Short circuit 17 is located in described test, for settling testing tool in down-hole.Concrete, it is the downhole tool with interior step surface, and described step surface is used for and testing tool matches.
When carrying out production test, need to be located long-term input well pressure measuring instrument on short circuit 17 in described test, in order to not affect normal production, be located on the first oil pipe 1B that short circuit 15 and described test be located between short circuit 17 at described blanking plug and be provided with multiple through hole 16, as production passage for subsequent use.
Described first oil pipe 1B is provided with horn mouth 18 near the lower end of horizontal segment 101.Described horn mouth 18, becomes large gradually along gravity direction diameter, and when by described first oil pipe 1B downward gas injection, the glassware for drinking water of itself and bottom has larger contact area, thus is conducive to being advanced along horizontal segment 101 to observation well 2 by water better.
Referring to Fig. 5, is the structural representation observing layering column pipe in well a kind of in the embodiment of the present invention.Described observation well 2 is arranged in gas storage border, in described observation well 2, arrange layering column pipe, can not only be used for monitoring pressure and carry out later stage draining dilatation, also has the partial function of note gas recovery well simultaneously.
Described layering column pipe is arranged on to be observed in well 2, it comprises the second sleeve pipe 2A, be arranged on the second oil pipe 2B in described second sleeve pipe 2A, and be successively set on flowing short circuit 11 on described second oil pipe 2B, storm valve 12, at least one sliding sleeve 13, at least one packer 14, blanking plug is located short circuit 15, short circuit 17 is located in test, described second sleeve pipe 2A is provided with perforated interval, and the position of described perforated interval is connected with predetermined substratum.
Flowing short circuit 11 on described second oil pipe 2B, storm valve 12, sliding sleeve 13, packer 14, blanking plug are located short circuit 15, identical with on described first oil pipe 1B of its structure of short circuit 17 and effect is located in test.
Described manometer 19 can be tested in the later stage, when producing for monitoring later stage test, pressure and temperature in pit shaft when producing.
General, described oil-gas reservoir divide two-layer more than, the packer on described layering column pipe, the quantity of sliding sleeve are consistent with the oil-gas reservoir number of plies.As described in Figure 5, when described oil-gas reservoir divides two-layer, namely described predetermined substratum 3 comprises: the first oil-gas Layer 31 and the second oil-gas Layer 32.Correspondingly, described sliding sleeve 13 comprises the first sliding sleeve 131 and the second sliding sleeve 132; Described packer 14 comprises: the first packer 141 and the second packer 142 arranged up and down.The second oil pipe 2B between adjacent two described packers 14 being provided with described second sliding sleeve 132, by opening described second sliding sleeve 132, described layering column pipe can being made to be connected with predetermined substratum 3.
When carrying out dilatation, in described note gas recovery well 1, carry out gas injection; In described observation well 2, carry out substratum test, obtain substratum test result, according to described substratum test result, determine gas pay position, and closed.Concrete, first make described second oil-gas Layer 32 keep being communicated with at described layering column pipe, and sample analysis is carried out to the described material to flowing in described layering column pipe.If acquired sample is water, then described second oil-gas Layer 32 is kept to keep being communicated with described layering column pipe; If acquired sample is mainly gas, closes lower floor by dropping into blanking plug, described second oil-gas Layer 32 is not communicated with between described layering column pipe.
If output is water in described second oil-gas Layer 32, then in described layering column pipe, drop into blanking plug, make it be seated in described blanking plug and be located on short circuit 15, be not connected with described second oil-gas Layer 32 to make described layering column pipe.
Opening described second sliding sleeve 132 makes described layering column pipe be connected with the first oil-gas Layer 31, obtains the sample that in described layering column pipe, layering flows into; And sample analysis is carried out to the described sample to flowing in described layering column pipe, if acquired sample is water, then keep described first oil-gas Layer 31 to keep being communicated with described layering column pipe; If acquired sample is mainly gas, then close described second sliding sleeve 132, make described not to be communicated with between oil-gas Layer 32 with described layering column pipe.
The invention provides a kind of method and demixing injection-production system of gas storage reconstruction, the method of described gas storage reconstruction is by conjunction with oil-gas reservoir formation parameter, layering column pipe is entered under in described observation well, and according to described oil-gas reservoir formation parameter, segmenting perforating on described layering column pipe, to form perforated interval; And substratum test is carried out in described observation well, obtain substratum test result; According to described substratum test result, determine gas pay position, and closed.Described method can reduce residue water content in oil reservoir pointedly, the storage capacity of effective increase gas storage, and tested by substratum, the utilization rate of the natural gas injected in note gas recovery well can be improved, thus in limited oil reservoir space, realize reducing to greatest extent the object of building Kucheng's basis, be specially adapted to the aquifer such as bottom and edge water, high water-cut reservoir oil reservoir.
The foregoing is only several embodiments of the present invention, although the embodiment disclosed by the present invention as above, the embodiment that described content just adopts for the ease of understanding the present invention, is not intended to limit the present invention.Any those skilled in the art; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done on the formal of embodiment and details; but scope of patent protection of the present invention, the scope that still must define with appended claims is as the criterion.
Claims (10)
1. a method for gas storage reconstruction, is characterized in that, it comprises:
Obtain oil-gas reservoir formation parameter;
Described oil-gas reservoir arranges note gas recovery well respectively and observes well;
Enter layering column pipe under in described observation well, and according to described oil-gas reservoir formation parameter, segmenting perforating on described layering column pipe, to form perforated interval;
Enter to note gas production tubing string under in described note gas recovery well, carry out gas injection;
In described observation well, carry out substratum test, obtain substratum test result;
According to described substratum test result, determine gas pay position, and closed.
2. the method for gas storage reconstruction as claimed in claim 1, is characterized in that: described note gas recovery well is arranged on the middle part of oil-gas reservoir; Described observation well is arranged on the edge of oil-gas reservoir, is positioned at around described note gas recovery well.
3. the method for gas storage reconstruction as claimed in claim 2, is characterized in that: described note gas recovery well is horizontal well, and it is along gravity direction, spaced apart according to described oil-gas reservoir formation parameter.
4. the method for gas storage reconstruction as claimed in claim 1, is characterized in that: the perforated interval of described layering column pipe with meet predetermined permeability and be connected with the substratum of degree of porosity.
5. the method for gas storage reconstruction as claimed in claim 1, it is characterized in that, described substratum method of testing comprises:
Described perforated interval is opened in segmentation, and described layering column pipe is connected with predetermined substratum;
Obtain the sample that in described layering column pipe, layering flows into;
According to the character of described sample, obtain substratum test result, to determine to close or open corresponding substratum.
6., for a demixing injection-production system for the method for gas storage reconstruction as claimed in claim 1, it is characterized in that: it comprise for the note gas production tubing string of gas injection, gas production and for observing, the layering column pipe of draining,
Described note gas production tubing string is arranged in note gas recovery well, it comprises straight well section and horizontal segment, the first sleeve pipe is provided with in described straight well section, be arranged on the first oil pipe in described first sleeve pipe, and be successively set on storm valve on described first oil pipe, sliding sleeve, packer, blanking plug is located short circuit, short circuit is located in test, described blanking plug is located on the first oil pipe that short circuit and described test be located between short circuit and is provided with multiple through hole;
Described layering column pipe is arranged on to be observed in well, it comprises the second sleeve pipe, be arranged on the second oil pipe in described second sleeve pipe, and be successively set on storm valve on described second oil pipe, at least one sliding sleeve, at least one packer, blanking plug is located short circuit, short circuit is located in test, described second sleeve pipe is provided with perforated interval, and the position of described perforated interval is connected with predetermined substratum.
7. demixing injection-production system as claimed in claim 6, it is characterized in that: the two ends of described storm valve are provided with flowing short circuit, described flowing short circuit is variable diameters joint, and one end that its diameter is larger is connected with oil pipe, and one end that diameter is less is connected with described storm valve.
8. demixing injection-production system as claimed in claim 6, is characterized in that: described oil-gas reservoir divide two-layer more than, the packer on described layering column pipe, the quantity of sliding sleeve are consistent with the oil-gas reservoir number of plies.
9. demixing injection-production system as claimed in claim 7, is characterized in that: the second oil pipe between adjacent two described packers is provided with described sliding sleeve, by opening described sliding sleeve, described layering column pipe can be made to be connected with predetermined substratum.
10. demixing injection-production system as claimed in claim 6, is characterized in that: described first oil pipe is provided with horn mouth near the lower end of horizontal segment.
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| CN106894796A (en) * | 2017-01-09 | 2017-06-27 | 神华集团有限责任公司 | Inject a gas into method and device, the equipment on stratum |
| CN107313760A (en) * | 2016-04-26 | 2017-11-03 | 中国石油化工股份有限公司 | The method that layer steam injection improves development result of heavy oil reservoirs |
| CN111140202A (en) * | 2020-01-13 | 2020-05-12 | 中国石油天然气股份有限公司 | Deep well and ultra-deep well integrated production completion pipe string and operation method thereof |
| CN111878168A (en) * | 2020-07-09 | 2020-11-03 | 中国地质大学（武汉） | Method and system for storing natural gas and supplying heat by using abandoned mine |
| CN115110927A (en) * | 2021-03-23 | 2022-09-27 | 中国石油天然气股份有限公司 | Shaft cluster type underground gas storage method and device suitable for gas injection development mode and using method of device |
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