CN103470233A - Heavy oil reservoir natural gas huff-puff oil production process system and oil production method - Google Patents
Heavy oil reservoir natural gas huff-puff oil production process system and oil production method Download PDFInfo
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Abstract
A heavy oil reservoir natural gas huff-puff oil production process system and an oil production method. The method comprises the following steps: drilling a well in a target region of an oil reservoir, drilling a stratum, an oil layer, an interlayer and a natural gas layer from top to bottom, communicating the oil layer with the gas layer through a shaft, and perforating the oil layer and the gas layer; selecting the length of an eye tube, and installing a flow meter, a pressure gauge and a flow control valve; a production pipe column and a cable are put in, the production pipe column is sequentially connected with a first oil pipe, an oil well pump, an eye tube, a packer and a second oil pipe in series, and the cable conducts signals; setting a packer; installing a Christmas tree and an oil pumping unit; closing the well, and opening the flow control valve to enable the natural gas to flow into the oil layer; closing the flow control valve, and then stewing; and after the designed soaking time is reached, opening the well to recover oil. The natural gas layer high-pressure energy is fully utilized, so that the natural gas directly flows into the heavy oil layer from the gas layer through the shaft, the problems of complex process flow, high operation cost and high energy consumption are solved, the natural gas huff and puff efficiency is high, and the oil extraction efficiency is greatly improved.
Description
Technical field
The present invention relates to technical field of petroleum extraction, refer in particular to a kind of heavy crude reservoir natural gas huff and puff oil recovery process system and oil production method.
Background technology
At present, heavy crude reservoir often adopts that steam injection is handled up, SAGD, natural gas injection handle up, mix the methods such as rare lifting on combustion in situ, pump is exploited.Wherein, the oil production method that natural gas injection is handled up is mainly by the natural gas extraction ground in gas-bearing formation, obtain natural air-air source, by oil well, natural gas is injected to oil reservoir (gulping down the gas process) with compressor again, natural gas is dissolved in crude oil, reduce Crude viscosity, then, then open oil well by crude oil and be dissolved in the extraction of natural gas (process of feeling elated and exultant) in crude oil.
Telling beautiful gram heavy crude reservoir is that domestic first carries out the oil field that natural gas is handled up and tested.Experimental stage adopts liquified natural gas (LNG) as source of the gas, and adopt following injection technology: the liquified natural gas in the LNG storage tank is pressurized to suction port of compressor through the low temperature liquid booster pump, enter the suction port of compressor surge tank after the vaporization of LNG vaporizer, after compressor boost, be dispensed to the injection well head after entering the distributing valve Sets of Measurement.Concrete gas injection flow process is: LNG storage tank → low temperature liquid booster pump → vaporizer → suction port of compressor surge tank → gas injection compressor → distributing valve group → (through single well pipeline) gas injection well (Yin Baishou, Li Jun, the viscous crude natural gas test Above Ground Technology of handling up, the 26th the 10th phase of volume of oil-gas field surface engineering, 2007:24).At present, telling beautiful gram oil field and the Lu Ke oil field of oozing has implemented natural gas and handles up to annotate and adopt integrated technique, this technology need meet following requirement: (1) optimizes completion and well cementation mode, for meeting the requirement of huff and puff gas sealing ability, prevent from gas injection process occurring has channeling, guarantee gas injection safety, for horizontal well straight well section, straight well oil reservoir, adopt long well cementing of cement section to add the omnidistance hermetic seal cased hole completion of straight well section; (2) handle up hermetic seal well head and kit of development natural gas, can under high pressure realize hermetic seal; In injection process, pump be proposed to pump seat and be suspended on well head, guarantee that natural gas is from the oil pipe Safety Injection; Well head, in certain altitude, can meet the sucker rod pumping demand; Hermetic seal well head and kit mainly comprise polished rod connector, high pressure gas sealing wellhead, normal sleeve head, polished rod sealer etc.; (3) handle up in gas injection process to the requirement of tubing string hermetic seal for natural gas, consider gas injection process mesohigh gas tightness and production safety reliability, designed huff and puff gas-injection oil-production integrated pipe column; (4) can gas injection but also can produce for meeting not only, designed to annotate and adopted switching technique (specifically device please refer to following article: Gong little Xiong, Wang Aihua, Li Jun etc., the deep-layer heavy crude natural gas is handled up to annotate and is adopted integrated technique research and application, the petroleum gas journal, the 30th the 1st phase of volume, 2008:303-305; Bai Yanhua letter man is refined, and the viscous crude natural gas is handled up to annotate and adopted integrated technique research, petroleum machinery, and the 36th the 8th phase of volume, 2008:74-77).
Above-mentioned technology is adopted switching technique to completion and well cementation mode, well head and kit, flow string and notes high requirement, and technique and operating process are very complicated, operating cost is expensive, energy consumption is large.
Summary of the invention
In view of the defect described in background technology, purpose of the present invention, be to provide a kind of heavy crude reservoir natural gas huff and puff oil recovery process system and oil production method, take full advantage of self high-pressure energy of natural gas reservoir, make natural gas flow directly into Heavy Oil Reservoir from gas-bearing formation through pit shaft, avoided the problem that technological process is complicated, operating cost is high, energy consumption is large.
The purpose of the invention described above is to be realized by following technical scheme:
At first it should be noted that, in the actual production operating process, conventional Heavy Oil is exploited the devices such as needed oil pumper, production tree, extension pump installation, oil well pump, sucker rod, tail pipe, screen casing and is all coordinated the present invention.Because the structure of these devices, effect, mounting method and using method are universal, the present invention no longer repeats one by one to structure, effect, mounting method and the using method of said apparatus.
The invention provides a kind of heavy crude reservoir natural gas huff and puff oil recovery process system, be lowered to flow string in pit shaft, described flow string is serially connected with the first oil pipe, oil well pump, eye pipe, packer, the second oil pipe from top to bottom successively; Described pit shaft all has perforated interval in the position of corresponding oil reservoir and natural gas reservoir; The setting position of described packer is between oil reservoir and natural gas reservoir, with the oil jacket annular space between oil-separating layer and natural gas reservoir.
Heavy crude reservoir natural gas huff and puff oil recovery process system as above, the flow be provided with in the second oil pipe for monitoring gas discharge is taken into account for monitoring the pressure gauge of gas pressure; The second oil pipe end is provided with the flow control valve that enters the oil pipe flow for controlling natural gas.
Heavy crude reservoir natural gas huff and puff oil recovery process system as above is characterized in that described flow meter is connected with the flow meter terminal that is positioned at ground surface end by the first cable, and the flow meter terminal shows flow number; Described pressure gauge is connected with the pressure gauge terminal that is positioned at ground surface end by the second cable, and the pressure gauge terminal shows pressure value; Described flow control valve is connected with the flow control valve terminal that is positioned at ground surface end by the 3rd cable, by flow control valve terminal adjust flux control valve valve size, to control gas discharge; Described oil production technology system also is equipped with production tree at well head, is provided with the first cable aperture, the second cable aperture and the 3rd cable aperture on described production tree, so as the first cable, the second cable and the 3rd cable respectively correspondence pass; Rubber seal is passed through in gap between cable aperture and cable.
Heavy crude reservoir natural gas huff and puff oil recovery process system as above, it is characterized in that, described the first cable stretches out from described flow meter terminal, through the first cable aperture on production tree, extend into the oil jacket annular space along well head, eyelet by the eye pipe enters eye pipe inside and extends downward the second oil pipe again, with the flow meter that is arranged in the second oil pipe, is connected; Described the second cable stretches out from described pressure gauge terminal, and the second cable aperture through on production tree, extend into the oil jacket annular space along well head, then enters eye pipe inside and extend downward the second oil pipe by the eyelet of eye pipe, with the pressure gauge that is arranged in the second oil pipe, is connected; Described the 3rd cable stretches out from described flow control valve terminal, through the 3rd cable aperture on production tree, extend into the oil jacket annular space along well head, then enter eye pipe inside and extend downward the second oil pipe by the eyelet of eye pipe, be connected with the flow control valve of the second oil pipe end serial connection.
The present invention also provides a kind of heavy crude reservoir natural gas huff and puff oil recovery method, comprising:
Steps A: in the oil reservoir target area, drill an oil well, from top to down drills stratum, oil reservoir, interlayer and natural gas reservoir, by pit shaft, oil reservoir and gas-bearing formation is communicated with, and the wellbore section of corresponding oil reservoir and natural gas reservoir is carried out to perforation;
Step B: the eye pipe of selecting suitable length according to production capacity and the compartment thickness of eye tube material intensity, natural gas reservoir; The flow that is provided for monitoring gas discharge in second oil pipe is taken into account for monitoring the pressure gauge of gas pressure, be provided for controlling the flow control valve of gas discharge at the second oil pipe end, by the cable of flow meter, pressure gauge and the flow control valve eyelet on pipe through the second oil pipe and eye respectively, and make the length in reserve of each cable be slightly larger than the degree of depth of pit shaft;
Step C: sequentially connect the first oil pipe, oil well pump, eye pipe, packer and the second oil pipe, form flow string, be lowered to this flow string in pit shaft, be lowered to the first cable, the second cable and the 3rd cable simultaneously, and set this packer to the position between corresponding oil reservoir in pit shaft and natural gas reservoir; The free end of the first cable, the second cable and the 3rd cable is corresponding to the first cable aperture, the second cable aperture and the 3rd cable aperture on production tree respectively, with flow meter terminal, pressure gauge terminal and flow control valve terminal, join respectively; The conventional wellhead assemblies such as production tree, oil pumper are installed;
Step D: close oil nozzle on oil pumper and production tree with closing well, open the valve of flow control valve, make natural gas flow into oil reservoir through the second oil pipe pipeline section, eye pipe, oil jacket annular space;
Step e: close the valve of flow control valve, then stewing well;
Step F: reach the stewing well of design after the time, keep the valve closing of flow control valve, open described oil pumper and oil nozzle, oil recovery drives a well.
Method as above, wherein: in described step e, after the natural gas injection amount of described flow meter monitoring reaches predetermined value, then close the valve of flow control valve.
Method as above, wherein: in the oil recovery process of step F, when crude output does not reach design object, repeating said steps D is to step F.
Method as above also comprises following steps between step C and step D:
Step C ': at first close the valve of described flow control valve, open described oil pumper and oil nozzle and recovered the oil, until oil production is lower than design during production capacity, then carry out described step D.
By above technical scheme, characteristics of the present invention and advantage are:
Oil production technology system and oil production method that the present invention proposes, be particularly suitable for growing in the Heavy Oil Reservoir bottom situation of extensive abnormal pressure natural gas reservoir.The natural gas reservoir less for non-abnormal pressure or scale, that production capacity is lower, pressure reduction between natural gas reservoir and Heavy Oil Reservoir is large not, the natural gas reservoir energy is low, can first adopt the method for other heavy crude producing to be exploited, progress along with exploitation, Heavy Oil Reservoir pressure can reduce gradually, when the pressure reduction between natural gas-bearing formation and oil reservoir reaches certain value, oil production technology system and the oil production method that just can adopt the present invention to propose.
The present invention is communicated with natural gas reservoir and oil reservoir by pit shaft, take full advantage of the pressure reduction between natural gas reservoir and oil reservoir, draw natural gas and automatically flow into oil reservoir, reduce Crude viscosity, realize the natural gas huff and puff oil recovery, and do not need special completion and well cementation mode, wellhead assembly, flow string and notes to adopt switching technique.So the present invention, on the basis of improving crude output and recovery ratio, has the many advantages such as technological process is simple, the oil producing operation cost is low, energy consumption is low especially, has improved oilfield economic benefit.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention in gulping down the gas process;
Fig. 2 is the schematic diagram of the present invention in the process of feeling elated and exultant.
The specific embodiment
For making purpose of the present invention, technological means and technique effect have more complete and clearly disclose, below be elaborated, and see also accompanying drawing and parts label.
Refer to Fig. 1, paper oil production technology system of the present invention.
A kind of heavy crude reservoir natural gas huff and puff oil recovery process system has been lowered to a set of flow string 1 in pit shaft 5, and described flow string 1 is serially connected with the first oil pipe 7, oil well pump 20, eye pipe 9, packer 17 and the second oil pipe 12 from top to bottom successively; Described pit shaft 5 all has perforated interval in the position of corresponding oil reservoir 8 and natural gas reservoir 13, and each perforated interval is offered a plurality of borehole 19(or 14); Production capacity and interlayer 10 thickness that the length of described eye pipe 9 is managed 9 strengths of materials, natural gas reservoir 13 by eye determine; The setting position of described packer 17 is between oil reservoir 8 and natural gas reservoir 13, refer to the annular space between flow string 1 and sleeve pipe 28 for the oil jacket annular space 18(between oil-separating layer 8 and natural gas reservoir 13), and the position of packer 17 is in the situation that eye is managed the 9 intensity close natural gas reservoir 13 that allows try one's best, to guarantee that eye pipe 9 has enough length, there is abundant eyelet 90, thereby provide circulation passage as much as possible for natural gas.
The pressure gauge 16 that 12 li flow meters 11 that are provided with for monitoring gas discharge of described the second oil pipe reach for monitoring gas pressure; The second oil pipe 12 ends are provided with the flow control valve 15 for controlling gas discharge.
Preferably, described flow meter 11 is connected with the flow meter terminal 26 that is positioned at ground surface end by the first cable 21, and flow meter terminal 26 shows flow number; Described pressure gauge 16 is connected with the pressure gauge terminal 25 that is positioned at ground surface end by the second cable 22, and pressure gauge terminal 25 shows pressure value; Described flow control valve 15 is connected with the flow control valve terminal 2 that is positioned at ground surface end by the 3rd cable 6, by the valve size of flow control valve terminal 2 adjust flux control valves 15, thereby controls gas discharge; Described oil production technology system also is equipped with production tree 29 at well head, and described production tree is provided with the first cable aperture 31, the second cable aperture 32 and the 3rd cable aperture 30, so as the first cable 21, the second cable 22 and the 3rd cable 6 respectively correspondence pass; Rubber seal is passed through in gap between cable aperture and cable.
Preferably, described the first cable 21 stretches out from described flow meter terminal 26, through the first cable aperture 31 on production tree 29, extend into oil jacket annular space 18 along well head 24, eyelet 90 by eye pipe 9 enters eye pipe 9 inside and extends downward the second oil pipe 12 again, with the flow meter 11 that is arranged in the second oil pipe 12, is connected; Described the second cable 22 stretches out from described pressure gauge terminal 25, through the second cable aperture 32 on production tree 29, extend into oil jacket annular space 18 along well head 24, eyelet 90 by eye pipe 9 enters eye pipe 9 inside and extends downward the second oil pipe 12 again, with the pressure gauge 16 that is arranged in the second oil pipe 12, is connected; Described the 3rd cable 6 stretches out from described flow control valve terminal 2, through the 3rd cable aperture 30 on production tree 29, extend into oil jacket annular space 18 along well head 24, eyelet 90 by eye pipe 9 enters eye pipe 9 inside and extends downward the second oil pipe 12 again, with the flow control valve 15 of the second oil pipe 12 ends serial connections, is connected.
See also Fig. 1 and Fig. 2, below will introduce the oil production method that the heavy crude reservoir natural gas is handled up, the method comprises:
Steps A: drill an oil well 3 in the oil reservoir target area, from top to down drills stratum 4, oil reservoir 8, interlayer 10 and natural gas reservoir 13, by pit shaft 5, oil reservoir 8 and natural gas reservoir 13 is communicated with, and the wellbore section of corresponding oil reservoir 8 and natural gas reservoir 13 is carried out to perforation;
Step B: the eye pipe 9 of selecting suitable length according to production capacity and interlayer 10 thickness of eye tube material intensity, natural gas reservoir 13; Be provided for monitoring the flow meter 11 of gas discharge and the pressure gauge 16 for monitoring gas pressure in the second oil pipe 12, be provided for controlling the flow control valve 15 of gas discharge at the second oil pipe 12 ends, respectively through the eyelet 90 on the second oil pipe 12 and eye pipe 9, and make the length of each cable be slightly larger than the degree of depth of pit shaft 5 on the cable of flow meter 11, pressure gauge 16 and flow control valve 15;
Step C: sequentially connect the first oil pipe 7, oil well pump 20, eye pipe 9, packer 17 and the second oil pipe 12, form flow string 1, be lowered to described flow string 1 in pit shaft 5, be lowered to the first cable 21, the second cable 22 and the 3rd cable 6, and set packer 17 is to the position between the interior corresponding oil reservoir 8 of pit shaft 5 and natural gas reservoir 13 simultaneously; The free end of the first cable 21, the second cable 22 and the 3rd cable 6, respectively through the first cable aperture 31, the second cable aperture 32 and the 3rd cable aperture 30 on production tree 29, is then joined with flow meter terminal 26, pressure gauge terminal 25 and flow control valve terminal 2 respectively; The conventional wellhead assemblies such as production tree 29, oil pumper are installed;
Step D: close oil nozzle 27 on oil pumper and production tree 29 with closing well, open the valve of flow control valve 15, make natural gas flow into oil reservoirs 8 through the second oil pipe pipeline section 12, eye pipe 9, oil jacket annular space 18, now the flow direction of natural gas is as shown in the arrow in Fig. 1;
Step e: close the valve of flow control valve 15, then stewing well;
Step F: reach the stewing well of design after the time, keep the valve closing of flow control valve 15, open oil pumper and oil nozzle 27, the oil recovery that drives a well, now the flow direction of crude oil is as shown by the arrows in Figure 2.
In described step e, after natural gas injection amount that described flow meter 11 is monitored reaches predetermined value, then close the valve of flow control valve 15.The predetermined value of natural gas injection amount is in advance by the methods such as reservoir engineering and numerical simulation demonstration.
Preferably, in the oil recovery process of step F, when crude output does not reach design object, repeating said steps D is to step F.Crude output is a dynamic process, and along with crude oil production, rarer fluid can take the lead in being exploited out, and denseer thick fluid can be stayed accumulation gradually in oil reservoir, causes yield reducation.Once crude output, lower than design load, just can start natural gas huff and puff oil recovery method of the present invention, by natural gas being dissolved in to oil reservoir dilution viscous crude, be beneficial to the normal output of crude oil.
Preferably, also comprise following steps between step C and step D:
Step C ': at first close the valve of described flow control valve 15, open oil pumper and oil nozzle 27 and recovered the oil, until oil production is during lower than the design production capacity, then carry out described step D.This step shows, the initial stage of production do not need to carry out the stage that natural gas is handled up, can as usual carry out oil producing operation, until the undesirable natural gas of opening again of oil production is handled up.
Prerequisite of the present invention or applicable elements are the pressure that the reduced pressure (refer to that natural gas is from the natural gas reservoir output, arrive the surplus pressure of oil reservoir position through pit shaft) of natural gas reservoir is far longer than oil reservoir, and the natural gas reservoir reserves are large, production capacity is high; Pressure reduction between natural gas reservoir and oil reservoir is larger, the gas-bearing formation production capacity is higher, gulps down the gas process and more easily carries out.
If the natural gas reservoir reduced pressure a little more than, approximate or a little less than formation pressure, or the natural gas reservoir reserves are less, production capacity is lower, natural gas reservoir does not have enough energy makes natural gas inject in a large number oil reservoir, now will divide following two kinds of situations: 1, the not too high Heavy Oil Reservoir for Crude viscosity, if oil well can reach the design production capacity, can first directly carry out above-mentioned steps C ' and be exploited; 2, at first the very high Heavy Oil Reservoir for Crude viscosity, if oil well can not reach the design production capacity, must take measures, and such as the pit shaft heating etc., viscous crude first carried out to falling and glutinously just can carry out above-mentioned steps C ' and exploited to a certain degree.Exploitation along with oil reservoir, formation pressure reduces gradually, production capacity descends, and the pressure differential between natural gas reservoir and oil reservoir will strengthen gradually, when the pressure reduction between natural gas-bearing formation and oil reservoir reaches certain value (by reservoir engineering method and method for numerical simulation demonstration), just can carry out above-mentioned step D and carry out natural gas and gulp down the gas process.
Above for being only the schematic part embodiment of the present invention; not in order to limit the scope of the invention; any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification, within all should being included in this patent protection domain.
Claims (8)
1. a heavy crude reservoir natural gas huff and puff oil recovery process system, is characterized in that, has been lowered to flow string in pit shaft, and described flow string is serially connected with the first oil pipe, oil well pump, eye pipe, packer, the second oil pipe from top to bottom successively; Described pit shaft all has perforated interval in the position of corresponding oil reservoir and natural gas reservoir; The setting position of described packer is between oil reservoir and natural gas reservoir, with the oil jacket annular space between oil-separating layer and natural gas reservoir.
2. heavy crude reservoir natural gas huff and puff oil recovery process system according to claim 1, is characterized in that, the flow be provided with in described the second oil pipe for monitoring gas discharge is taken into account for monitoring the pressure gauge of gas pressure; The second oil pipe end is provided with the flow control valve that enters the oil pipe flow for controlling natural gas.
3. heavy crude reservoir natural gas huff and puff oil recovery process system according to claim 2, is characterized in that, described flow meter is connected with the flow meter terminal that is positioned at ground surface end by the first cable, and the flow meter terminal shows flow number; Described pressure gauge is connected with the pressure gauge terminal that is positioned at ground surface end by the second cable, and the pressure gauge terminal shows pressure value; Described flow control valve is connected with the flow control valve terminal that is positioned at ground surface end by the 3rd cable, by flow control valve terminal adjust flux control valve valve size, to control gas discharge; Described oil production technology system also is equipped with production tree at well head, is provided with the first cable aperture, the second cable aperture and the 3rd cable aperture on described production tree, so as the first cable, the second cable and the 3rd cable respectively correspondence pass; Rubber seal is passed through in gap between cable aperture and cable.
4. heavy crude reservoir natural gas huff and puff oil recovery process system according to claim 3, it is characterized in that, described the first cable stretches out from described flow meter terminal, through the first cable aperture on production tree, extend into the oil jacket annular space along well head, eyelet by the eye pipe enters eye pipe inside and extends downward the second oil pipe again, with the flow meter that is arranged in the second oil pipe, is connected; Described the second cable stretches out from described pressure gauge terminal, and the second cable aperture through on production tree, extend into the oil jacket annular space along well head, then enters eye pipe inside and extend downward the second oil pipe by the eyelet of eye pipe, with the pressure gauge that is arranged in the second oil pipe, is connected; Described the 3rd cable stretches out from described flow control valve terminal, through the 3rd cable aperture on production tree, extend into the oil jacket annular space along well head, then enter eye pipe inside and extend downward the second oil pipe by the eyelet of eye pipe, be connected with the flow control valve of the second oil pipe end serial connection.
5. a heavy crude reservoir natural gas huff and puff oil recovery method comprises:
Steps A: in the oil reservoir target area, drill an oil well, from top to down drills stratum, oil reservoir, interlayer and natural gas reservoir, by pit shaft, oil reservoir and gas-bearing formation is communicated with, and the wellbore section of corresponding oil reservoir and natural gas reservoir is carried out to perforation;
Step B: the eye pipe of selecting suitable length according to production capacity and the compartment thickness of eye tube material intensity, natural gas reservoir; The flow that is provided for monitoring gas discharge in second oil pipe is taken into account for monitoring the pressure gauge of gas pressure, be provided for controlling the flow control valve of gas discharge at the second oil pipe end, by the cable of flow meter, pressure gauge and the flow control valve eyelet on pipe through the second oil pipe and eye respectively, and make the length in reserve of each cable be slightly larger than the degree of depth of pit shaft;
Step C: sequentially connect the first oil pipe, oil well pump, eye pipe, packer and the second oil pipe, form flow string, be lowered to this flow string in pit shaft, be lowered to the first cable, the second cable and the 3rd cable simultaneously, and set this packer to the position between corresponding oil reservoir in pit shaft and natural gas reservoir; The free end of the first cable, the second cable and the 3rd cable, through the first cable aperture, the second cable aperture and the 3rd cable aperture on production tree, is joined with flow meter terminal, pressure gauge terminal and flow control valve terminal respectively; Production tree, oil pumper are installed;
Step D: close oil nozzle on oil pumper and production tree with closing well, open the valve of flow control valve, make natural gas flow into oil reservoir through the second oil pipe pipeline section, eye pipe, oil jacket annular space;
Step e: close the valve of flow control valve, then stewing well;
Step F: reach the stewing well of design after the time, keep the valve closing of flow control valve, open described oil pumper and oil nozzle, oil recovery drives a well.
6. method according to claim 5, wherein:
In described step e, after the natural gas injection amount of described flow meter monitoring reaches predetermined value, then close the valve of flow control valve.
7. according to the described method of claim 5 or 6, wherein:
In the oil recovery process of step F, when crude output does not reach design object, repeating said steps D is to step F.
8. according to the described method of claim 5 or 6, also comprise following steps between step C and step D:
Step C ': at first close the valve of described flow control valve, open described oil pumper and oil nozzle and recovered the oil, until oil production is lower than design during production capacity, then carry out described step D.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332678A (en) * | 2014-07-29 | 2016-02-17 | 中国石油化工股份有限公司 | Gas injection swallowing-spitting method |
| CN107035349A (en) * | 2017-06-10 | 2017-08-11 | 山东恒驰石油装备有限责任公司 | A kind of interlayer pressure difference cyclic water stimulation pumping pipe string |
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| CN111350478B (en) * | 2018-12-21 | 2022-06-03 | 中国石油天然气股份有限公司 | Oil production method and device |
| CN116971748A (en) * | 2023-09-22 | 2023-10-31 | 山东创新石油技术有限公司 | Intelligent explosion-proof drainage gas production machine pumping water pump |
| CN116971748B (en) * | 2023-09-22 | 2023-12-08 | 山东创新石油技术有限公司 | Intelligent explosion-proof drainage gas production machine pumping water pump |
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