CN101235709B - Petroleum engineering circulating gas regeneration method and its special equipment - Google Patents
Petroleum engineering circulating gas regeneration method and its special equipment Download PDFInfo
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- CN101235709B CN101235709B CN2007100635175A CN200710063517A CN101235709B CN 101235709 B CN101235709 B CN 101235709B CN 2007100635175 A CN2007100635175 A CN 2007100635175A CN 200710063517 A CN200710063517 A CN 200710063517A CN 101235709 B CN101235709 B CN 101235709B
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Abstract
The invention relates to an oil program circulating gas regenerating method and the special-purpose devices, which belongs to the technical field of gas regenerating in oil program. The invention aims at the problems that circulating gas can not be recycled to use in the existing gas well drilling construction, which put forwards that mixed phase of high-temperature gas, liquid and solid body which are returned from a well casing is led to pass through treatment fluid, gas escapes from the treatment fluid, liquid and solid body are left in the treatment fluid to get mixed fluid, gas which escapes can be recycled to use after being dried through a drying device, and the mixed fluid is liquid-solid separated, solid body in the mixed fluid is separated out, and the liquid is recycled to use. The invention simultaneously provides a gas-liquid-solid multiphase separating equipment, which mainly comprises a liquid tank 1, a solid-liquid separator 2, an oil-water separator 3, a condenser 4, a mixer 5 and a gas drying device 6. The method of the invention has the advantages of fast gas-liquid-solid separation speed, high gas purity, simple processing technique, low gas processing cost and high gas processing efficiency, which is beneficial for environmental conservation, and has wide scope of application.
Description
Technical field
The present invention relates to a kind of regeneration treating method and isolated plant thereof that is used for oil drilling, completion practice, well stimulation, formation testing, gas testing, oil recovery work progress recyclegas.
Background technology
In engineering constructions such as oil drilling; For improving bit speed, in time finding, estimate and the protection oil-gas Layer; Improve oil and gas production; Generally adopt technology such as gas drilling in the oil field that is applicable to gas drilling, well stimulations such as gas drilling, completion and gas injection oil recovery are new technologies of generally being paid attention to both at home and abroad in recent years and using.It adopts gases such as nitrogen, air, natural gas, carbon dioxide gas, oil production machine tail gas as circulation of fluid, has greatly reduced the pit shaft head of liquid, has realized constructions such as under balance pressure drilling truly, completion.At present, gas drilling has formed the technology of comparative maturity from the matching equipment to the construction technology both at home and abroad, and gas drilling quantity raises year by year, has vast potential for future development.
In the gas drilling construction, air and formation hydrocarbon gas are prone to cause serious accidents such as the down-hole catches fire, blast.Use nitrogen, natural gas, carbon dioxide gas etc. as circulation of fluid, can avoid problems such as down-hole combustion explosion.But in nitrogen injection drilling, gas drilling, carbon dioxide drilling well, because the consumption of inert gas is big, cost of production is expensive, has limited applying of this technology to a certain extent.
In gas drilling, under the impact of bit cutting and high velocity air, the stratum mineral are highly dispersed, and generate to comprise micron order even nano level solid phase particles.Therefore the fluid that returns out from pit shaft except that containing a large amount of gases, also contains drilling cuttings, water, wet goods material.Accomplish the recycle of gas, must separate, purify, remove solid and liquid component in the fluid-mixing, make gas reach reusable standard.At present both at home and abroad in gas drilling construction, above-mentioned gas can't recycle, but it is bled off or burns, and not only brings environment pollution, and causes the waste of gas resource, and cost raises, and equipment investment is high, has restricted this The Application of Technology.If can the nitrogen of costliness, natural gas etc. be handled regeneration, just can reduce gas drilling cost and original equipment cost greatly.
Therefore, inventing a kind of recyclegas regeneration techniques is to reduce pressing for of gas drilling cost, raising oil gas field whole development benefit.
Summary of the invention
To at present both at home and abroad in the gas drilling construction; As the nitrogen of circulation of fluid, air, natural gas, carbon dioxide gas, oil production machine tail gas can't recycle problem, the invention provides a kind of recyclegas that can be used in the work progresss such as oil drilling, completion practice, formation testing, gas testing, well stimulation and gas-lift production, gas injection oil recovery and handle reutilization technology.Through simply, efficiently, processing method cheaply, make the Gas reclamation recycle, reduce the cost of production of inert gas, improve oil gas field whole development benefit.
Concrete technical scheme is following.
The renovation process of the petroleum engineering circulating gas that the present invention proposes may further comprise the steps:
(1) three phase separation and cooling: make the liquid-solid mixing of the High Temperature Gas returned out from pit shaft mutually through treatment fluid, gas is overflowed from treatment fluid, and liquid and solid are stayed and obtained mixed liquor in the treatment fluid, and escaping gas is processed liquid and lowers the temperature; Mixed phase flow amount: 0.2～80m
3/ second m
3Treatment fluid, the mixed phase flow speed of annular space outlet: 3～30m/s, the mixing phase temperature of annular space outlet: 20～150 ℃, treatment fluid temperature: 10～70 ℃;
(2) drying: step (1) escaping gas is sent into drying device carry out drying, dried gas circulation is used;
(3) liquid-solid separation: the mixed liquor that step (1) is obtained carries out liquid-solid separation, isolates solid wherein, and liquid recycles.
Described recyclegas there is not special qualification; As long as can be used in the petroleum works such as oil drilling, completion practice, formation testing, gas testing, well stimulation and gas-lift production, gas injection oil recovery just passablely, for example be nitrogen, air, natural gas, carbon dioxide gas or oil production machine tail gas.
Described treatment fluid is not had special qualification yet, if the mixing of the gas/liquid/solid that can gas be returned out from pit shaft just be separated out can, the treatment fluid that for example satisfies this requirement can be the aqueous solution, oil, O/w emulsion, water-in-oil emulsion.
The aqueous solution that is used for the isolation of purified gas/liquid/solid three-phase fluid gas of petroleum works can be a kind of in the following aqueous solution:
(1) contain the aqueous solution of one or more soluble inorganic salts or organic salt, the total weight percent content of said salt is 0.1%～10%.The aqueous solution of the aqueous solution of 0.5% aluminium chloride or 1% calcium chloride for example.The total content of salt can not be very little, and is invalid very little, too many waste.
(2) contain the aqueous solution of one or more soluble polymers, the total weight percent content of said soluble polymer is 0.05%～0.1%.The aqueous solution of the aqueous solution of 0.1% polyacrylamide or 0.05% polyethylene glycol for example.
(3) contain the aqueous solution of soluble inorganic salt and soluble polymer; The weight percent content of said soluble inorganic salt and soluble polymer is respectively 0.1%～10% and 0.05%～0.1%; Said soluble inorganic salt can be one or more, and said soluble polymer can be one or more.
In above-mentioned three kinds of aqueous solution, soluble inorganic salt comprises aluminium salt, molysite, calcium salt, magnesium salts, sylvite, polymeric aluminum and polymerization iron, and solubility organic salt comprises organic aluminium salt, organic calcium salt and potassium salt.
Said aluminium salt for example is aluminum sulfate or aluminium polychloride etc.; Said calcium salt for example is calcium chloride, calcium nitrate etc.; Said magnesium salts for example is magnesium sulfate, magnesium chloride, magnesium nitrate etc., and said sylvite is potassium sulfate, potassium phosphate, potassium chloride etc. for example, and said organic aluminium salt for example is alkyl aluminum chloride (R
2AlCl and RAlCl
2) etc.
In above-mentioned three kinds of aqueous solution, water-soluble polymer comprises poly-quaternary ammonium salt, anion surfactant, PAMC, PAMA and their derivative.
The oil that is used for the isolation of purified gas/liquid/solid three-phase fluid gas of petroleum works can be diesel oil, crude oil, mineral oil or the oil solution that contains one or more soluble polymers, and the total weight percent content of said soluble polymer is 0.05%～0.1%.
The O/w emulsion that is used for the isolation of purified gas/liquid/solid three-phase fluid gas of petroleum works, said O/w emulsion be meant in water, contain one or more hydrophilic surfactant actives and with the immiscible oil of water, form O/w emulsion.Use different oil or different surface active agents can make the ratio of profit different, therefore do not stress the relation with contents between each component here, only require that it is that O/w emulsion is just passable.
In described O/w emulsion, the hydrophilic surfactant active comprises petroleum sulfonate, alkylsulfonate, and the said and immiscible oil of water comprises diesel oil, crude oil, mineral oil.
The water-in-oil emulsion that is used for the isolation of purified gas/liquid/solid three-phase fluid gas of petroleum works, said water-in-oil emulsion be meant with the immiscible oil of water in contain one or more lipophilic surfactants and water, form water-in-oil emulsion.Use different oil or different surface active agents can make the ratio of profit different, therefore do not stress the relation with contents between each component here, only require that it is that O/w emulsion is just passable.
In described water-in-oil emulsion, lipophilic surfactant comprises this dish class, Tweens and polyether surfactant.Said and the immiscible oil of water comprises diesel oil, crude oil, mineral oil.
This dish type surfactant for example is span 80, this dish 60, and the Tweens surfactant for example is Tween 80, polysorbate60, and polyether surfactant for example is polyethers L63.
Drying device in the step (2) does not have special qualification, as long as can the moisture in the gas be removed just passablely, for example uses the device of molecular sieve.
Solid separation method for step (3) does not have special qualification, if can solid be separated from mixed liquor just passable, for example centrifugation or methods such as filtration.
The method that the present invention proposes in order to implement; The solid heterogeneous separation equipment of a kind of gas-liquid has been proposed; Said equipment mainly comprises fluid reservoir 1, solid-liquid separator 2, oil water separator 3, condensing apparatus 4, blender 5 and gas drier 6, and the bottom of fluid reservoir 1 is connected with the upper end of solid-liquid separator 2 through pipeline, and solid-liquid separator 2 upper ends are lower than the bottom of fluid reservoir 1; The top of fluid reservoir 1 is connected with gas drier 6 through pipeline; Gas drier 6 is provided with gas discharge outlet, and the lower end of solid-liquid separator 2 is provided with the solid discharge mouth, and the middle and upper part of solid-liquid separator 2 is connected with oil water separator 3 through pipeline; The middle and upper part of oil water separator 3 is provided with the oil phase floss hole; The lower end is connected with condensing apparatus 4, and condensing apparatus 4 is connected with blender 5 through pipeline, and blender 5 is provided with the inlet of gas-liquid-solid multiphase flow and the outlet opening of gas-liquid-solid multiphase flow and the mixed mixture of treatment fluid.
The interior bottom of described fluid reservoir 1 is provided with the heterogeneous fluid distributing plate.
Described solid-liquid separator 2 is preferably whizzer or strainer, and isolated liquid phase gets into oil water separator 3.
Described blender 5 can make three-phase fluid and parting liquid carry out fully premixed, in spoiler is arranged, when three-phase flows into, can carry out premixed fully
Be provided with the mouth of adding of chemical agent on the pipeline in condensing apparatus (4) and being connected of blender (5).
Gases such as the nitrogen that will return out from well head, natural gas, carbon dioxide gas get into the fluid-mixing of drilling cuttings, oil (water) etc. and blender 5, mix with parting liquid; Get into fluid reservoir 1 together, fully mix with parting liquid, the solid phase in the heterogeneous fluid, the separated liquid of liquid phase absorb, flocculation; Thereby with gas phase separation; At this moment the temperature of gas also reduces, effusion parting liquid, recycle after drying device 6 is removed moisture.Separated liquid absorbs, the liquid phase and the solid phase of flocculation get into solid-liquid separator 2 with parting liquid, and with Separation of Solid and Liquid, solid phase is discharged from the lower end; Liquid phase gets into oil water separator 3, tells oil phase, and water is through condensing apparatus 4 coolings; Replenish chemical agent as required, get into blender 5 recyclings.
Utilize liquid phase, solid phase in circulating gas regeneration method of the present invention gas/liquid/solid three-phase fluid that effectively the separation bubble amount is big; Gas after the separation can be recycled, solve the problem that gas discharging in the petroleum works construction such as present gas drilling or burning cause the environment pollution and the gas wasting of resources.It is fast that this invention has the gas, liquid, solid separating rate, the gas high purity, and dust removal efficiency improves more than 20 times than whirlwind eliminator, and treatment process is simple, and cost is low, and gas treatment efficient is high, and can in time obtain the geology rock sample; Because of handling in very low, continuous, the airtight piece-rate system of the solubility of gas in liquid, characteristics such as the gas loss amount is few, helps environmental protection, and the scope of application is wide.Through with the interchange of heat of special-purpose liquid, reduce the temperature of the air-flow that returns out well head, can reduce the temperature of high-temperature gas rapidly, its temperature is reached recycles requirement.Solid concentration is less than 5ppm in the gas after the processing, and the solid phase particle diameter reaches the requirement that recycles less than 5 μ m.Reusable after the treated and additional active ingredient of treatment fluid.
Description of drawings
Fig. 1 is the sketch map of the solid heterogeneous separation equipment of expression gas-liquid of the present invention.
The specific embodiment
Explain the solid heterogeneous separation equipment of gas-liquid of the utility model in more detail below in conjunction with Fig. 1.
As shown in Figure 1, equipment of the present invention mainly comprises fluid reservoir 1, solid-liquid separator 2, oil water separator 3, condensing apparatus 4, blender 5 and gas drier 6, is provided with the heterogeneous fluid distributing plate in the interior bottom of fluid reservoir 1; The bottom of fluid reservoir 1 is connected with the upper end of solid-liquid separator 2 through pipeline; And solid-liquid separator 2 upper ends are lower than the bottom of fluid reservoir 1, and solid-liquid separator 2 is preferably whizzer or strainer, and the top of fluid reservoir 1 is connected with gas drier 6 through pipeline; Gas drier 6 is provided with gas discharge outlet; The lower end of solid-liquid separator 2 is provided with the solid discharge mouth, and the middle and upper part of solid-liquid separator 2 is connected with oil water separator 3 through pipeline, and the middle and upper part of oil water separator 3 is provided with the oil phase floss hole; The lower end is connected with condensing apparatus 4; Condensing apparatus 4 is connected with blender 5 through pipeline, on this pipeline, is provided with the mouth of adding of chemical agent, and blender 5 is provided with the inlet of gas-liquid-solid multiphase flow and the outlet opening of gas-liquid-solid multiphase flow and the mixed mixture of treatment fluid.
Gases such as the nitrogen that will return out from well head, natural gas, carbon dioxide gas get into the fluid-mixing of drilling cuttings, oil (water) etc. and blender 5, mix with treatment fluid; Get into fluid reservoir 1 together, fully mix with treatment fluid, the solid phase in the heterogeneous fluid, the separated liquid of liquid phase absorb, flocculation; Thereby with gas phase separation; At this moment the temperature of gas also reduces, effusion treatment fluid, recycle after drying device 6 is removed moisture.The liquid phase and the solid phase that are processed liquid absorption, flocculation get into solid-liquid separator 2 with treatment fluid, and with Separation of Solid and Liquid, solid phase is discharged from the lower end; Liquid phase gets into oil water separator 3, tells oil phase, and water is through condensing apparatus 4 coolings; Replenish chemical agent as required, get into blender 5 recyclings.
Further explain the present invention with the mode of embodiment below, but the present invention is in no way limited to these embodiment.
Present embodiment is that example is further explained the present invention to reclaim the employed recyclegas of gas drilling.
When implementing gas drilling, air or nitrogen etc. play cutting carring and the effect that reduces temperature of diamond bit as fluid media (medium), when boring the dry stratum of chance; That return out from pit shaft is Dual-Phrase Distribution of Gas olid body (a large amount of a small amount of drilling cuttings of gas-entrained); When bore meeting the aquifer, what then return out from pit shaft is gas-solid water three-phase fluid, when boring when meeting oil reservoir; Returning out then has gas-solid oil three-phase in the air-flow, even a spot of water is also arranged.No matter be two mutually or three-phase, wherein the content of gas is quite big, and remaining amount is all lacked, otherwise does not carry.
In fluid reservoir 1, place parting liquid; Its composition can be the aqueous solution of 0.06% polyacrylamide; High temperature (the for example 75 ℃) fluid-mixing of gas that returns out from well head and drilling cuttings, oil (or water) etc. enters into blender 5, begins to mix mixed phase flow amount: 30m with parting liquid
3/ second m
3Treatment fluid, the mixed phase flow speed of annular space outlet: 20m/s, the mixing phase temperature of annular space outlet: 100 ℃, treatment fluid temperature: 40 ℃; Get into fluid reservoir 1, air-flow passes through the distributing plate overflow, and fully mixes with parting liquid; Polymer absorption in the separated liquid of solid phase in the heterogeneous fluid, flocculation with gas phase separation, contain the gas phase effusion parting liquid of water vapour; Simultaneously also be cooled to 40 ℃; The gas of effusion parting liquid gets into the drying device 6 of placing desiccant, removes moisture, injects into well recycle through air compressor.
The solid phase of separated liquid flocculation gets into solid-liquid separator 2 with parting liquid; Solid phase (polymer that has for example adsorbed landwaste) gets into oil water separator 3 with liquid phase separation, discharge, liquid phase, tells oil phase (when boring the chance oil reservoir; Return out and contain oil gas in the air-flow); Blender 5 is returned in water process condensing apparatus 4 coolings that contain polymer, replenishes polymer simultaneously, makes parting liquid keep best polymer content.
Further explain the treatment fluid of the isolation of purified gas/liquid that is used for petroleum works/solid three-phase fluid gas that the present invention uses below with embodiment 2～7, the method for gas/liquid/solid three-phase fluid is identical with the method for embodiment 1.
In 985kg water, add 5kg aluminium chloride and 10kg calcium chloride, stirring and dissolving obtains the treatment fluid of the isolation of purified gas/liquid that the is used for petroleum works/solid three-phase fluid gas of the present invention's use.
In 999.2kg water, add the 0.8kg polyacrylamide, stirring and dissolving obtains the treatment fluid of the isolation of purified gas/liquid that is used for petroleum works/solid three-phase fluid gas that the present invention uses.
In 994.2kg water, add 5kg aluminium chloride and 0.8kg polyacrylamide, stirring and dissolving obtains the treatment fluid of the isolation of purified gas/liquid that the is used for petroleum works/solid three-phase fluid gas of the present invention's use.
In 850kg water, add 130kg mineral oil and 9.3kg span 80 and 10.7kg Tween 80, stir, obtain the treatment fluid of the isolation of purified gas/liquid that the is used for petroleum works/solid three-phase fluid gas of the present invention's use.
In 850kg mineral oil, add 135kg water and 15kg polyethers L72, stir, obtain the treatment fluid of the isolation of purified gas/liquid that the is used for petroleum works/solid three-phase fluid gas of the present invention's use.
Embodiment 7
In 999.2kg water, add the 0.8kg polyacrylamide, stirring and dissolving, the treatment fluid of the isolation of purified gas/liquid that is used for petroleum works/solid three-phase fluid gas that the preparation cost invention is used.
Claims (9)
1. the renovation process of a petroleum engineering circulating gas is characterized in that, said method comprising the steps of:
(1) three phase separation and cooling: make the liquid-solid mixing of the High Temperature Gas returned out from pit shaft mutually through treatment fluid, gas is overflowed from treatment fluid, and liquid and solid are stayed and obtained mixed liquor in the treatment fluid, and escaping gas is processed liquid and lowers the temperature; Mixed phase flow amount: 0.2～80m
3/ second m
3Treatment fluid, the mixed phase flow speed of annular space outlet: 3～30m/s, the mixing phase temperature of annular space outlet: 20～150 ℃, treatment fluid temperature: 10～70 ℃;
(2) drying: step (1) escaping gas is sent into drying device carry out drying, dried gas circulation is used;
(3) liquid-solid separation: the mixed liquor that step (1) is obtained carries out liquid-solid separation, isolates solid wherein, and liquid recycles.
2. the renovation process of petroleum engineering circulating gas as claimed in claim 1 is characterized in that, said treatment fluid is a kind of in the following aqueous solution:
(1) contain the aqueous solution of one or more soluble inorganic salts or solubility organic salt, the total weight percent content of said salt is 0.1%～10%;
(2) contain the aqueous solution of one or more soluble polymers, the total weight percent content of said soluble polymer is 0.05%～0.1%;
(3) contain the aqueous solution of soluble inorganic salt and soluble polymer, the weight percent content of said soluble inorganic salt and soluble polymer is respectively 0.1%～10% and 0.05%～0.1%.
3. the renovation process of petroleum engineering circulating gas as claimed in claim 2; It is characterized in that; It is characterized in that; Soluble inorganic salt is aluminium salt, molysite, calcium salt, magnesium salts, sylvite, polymeric aluminum and polymerization iron, and said solubility organic salt is organic aluminium salt, organic calcium salt and potassium salt, and said water-soluble polymer is poly-quaternary ammonium salt, anion surfactant, PAMC, PAMA and their derivative.
4. the renovation process of petroleum engineering circulating gas as claimed in claim 1; It is characterized in that; Said treatment fluid is diesel oil, crude oil, mineral oil or the oil solution that contains one or more soluble polymers, and the total weight percent content of said soluble polymer is 0.05%～0.1%.
5. the renovation process of petroleum engineering circulating gas as claimed in claim 1 is characterized in that, said treatment fluid is O/w emulsion or water-in-oil emulsion.
6. the employed gas, liquid, solid three phase separation of the renovation process of a petroleum engineering circulating gas as claimed in claim 1 equipment; It is characterized in that; Said equipment mainly comprises fluid reservoir (1), solid-liquid separator (2), oil water separator (3), condensing apparatus (4), blender (5) and gas drier (6); The bottom of fluid reservoir (1) is connected with the upper end of solid-liquid separator (2) through pipeline; And solid-liquid separator (2) upper end is lower than the bottom of fluid reservoir (1), and the top of fluid reservoir (1) is connected with gas drier (6) through pipeline, and gas drier (6) is provided with gas discharge outlet; The lower end of solid-liquid separator (2) is provided with the solid discharge mouth; The middle and upper part of solid-liquid separator (2) is connected with oil water separator (3) through pipeline, and the middle and upper part of oil water separator (3) is provided with the oil phase floss hole, and the lower end is connected with condensing apparatus (4); Condensing apparatus (4) is connected with blender (5) through pipeline, and blender (5) is provided with the inlet of gas-liquid-solid multiphase flow and the outlet opening of gas-liquid-solid multiphase flow and the mixed mixture of treatment fluid.
7. gas, liquid, solid three phase separation equipment as claimed in claim 6 is characterized in that the interior bottom of said fluid reservoir (1) is provided with the heterogeneous fluid distributing plate.
8. gas, liquid, solid three phase separation equipment as claimed in claim 6 is characterized in that said solid-liquid separator (2) is preferably whizzer or strainer, and isolated liquid phase gets into oil water separator (3).
9. gas, liquid, solid three phase separation equipment as claimed in claim 6 is characterized in that, is provided with the mouth of adding of chemical agent on the pipeline in condensing apparatus (4) and being connected of blender (5).
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| RU2014107515A (en) * | 2011-09-19 | 2015-10-27 | Фп Марангони Инк. | THREE-PHASE SEPARATION SYSTEM FOR DRILLING MILLS AND DRILLING Sludge |
| CN106761658B (en) * | 2016-12-13 | 2023-09-29 | 神木富塬盛矿山支护材料有限公司 | Improved efficient gas anchor |
| CN108915638B (en) * | 2018-06-19 | 2020-10-27 | 蚌埠翰邦知识产权服务有限公司 | Single well casing gas desulfurization and pressurization storage device |
| CN109723974A (en) * | 2018-06-19 | 2019-05-07 | 刘玉友 | A kind of application method of oil field individual well production auxiliary device |
| CN113550729B (en) * | 2020-04-02 | 2023-06-30 | 中国石油天然气集团有限公司 | Detection recovery device for unconventional oil gas exploitation vent |
| CN113833425A (en) * | 2020-06-23 | 2021-12-24 | 中国石油化工股份有限公司 | Nitrogen drilling device, and treatment method and application of stratum produced water of nitrogen drilling |
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