CN114427429A - Device and method for treating hydrogen sulfide well bottom of oil well - Google Patents
Device and method for treating hydrogen sulfide well bottom of oil well Download PDFInfo
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- CN114427429A CN114427429A CN202010997607.7A CN202010997607A CN114427429A CN 114427429 A CN114427429 A CN 114427429A CN 202010997607 A CN202010997607 A CN 202010997607A CN 114427429 A CN114427429 A CN 114427429A
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- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 113
- 239000003129 oil well Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 49
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 39
- 239000012798 spherical particle Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 229910052707 ruthenium Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 210000003437 trachea Anatomy 0.000 claims 1
- 239000012752 auxiliary agent Substances 0.000 abstract description 12
- 238000006477 desulfuration reaction Methods 0.000 abstract description 11
- 230000023556 desulfurization Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 8
- 239000009671 shengli Substances 0.000 description 5
- 239000003814 drug Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011272 standard treatment Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention belongs to the technical field of oil field safety production and environmental protection, and particularly relates to a device and a method for treating hydrogen sulfide at the bottom of an oil well. The device comprises an air injection unit, an active reaction unit and a detection control unit; the air injection unit is connected with the active reaction unit through a capillary tube and provides air for the active reaction unit; the detection control unit detects the content of the hydrogen sulfide in the oil pipe sampling port and controls the air supply amount of the air injection unit according to the detected content of the hydrogen sulfide. According to the invention, the treatment node of hydrogen sulfide is arranged at the bottom of the well, so that the source treatment is realized, and the occupied area of equipment is reduced; cheap air is used as a desulfurization medium, a catalyst is used as an auxiliary agent, the desulfurization rate is high, the treatment cost is low, and no pollution is caused. Meanwhile, the device has the advantages of high automation degree, safety, reliability, and simple and convenient operation, management and maintenance, thereby having wide field popularization and application prospect.
Description
Technical Field
The invention belongs to the technical field of oil field safety production and environmental protection, and particularly relates to a device and a method for treating hydrogen sulfide at the bottom of an oil well.
Background
With the development of thick oil thermal recovery and water injection, a large number of oil wells with high hydrogen sulfide content appear in the victory oil field, and according to statistics, more than 1500 oil wells with hydrogen sulfide content exceeding the safety critical concentration exist, and the hydrogen sulfide content of individual oil wells reaches 50000mg/m3Hydrogen sulfide is not only a highly toxic gas and poses serious threat to the health of production operators, but also a strong corrosive gas which is easy to cause serious corrosion to shaft equipment to cause serious safety accidents, so that the treatment is urgently needed.
According to the principle of source treatment, two modes of casing chemical dosing and wellhead desulfurization equipment treatment are mainly adopted for treating the oil well hydrogen sulfide at present. (1) The casing chemical adding treatment is mainly characterized by that it utilizes metering pump to drop the liquid desulfurizing agent into the oil well casing, and the desulfurizing agent is passed through the oil casingThe liquid column in the annular space diffuses to the bottom of the well, reacts with hydrogen sulfide in produced liquid and is converted into stable sulfide. Although the method is simple, the height of the annular liquid column (about 1000 m) is high, and the volume is large (generally 10-20 m)3) The problems of slow effect and poor correspondence between the addition amount and the treatment effect exist under the influence of factors such as relatively small addition amount (100L/d) of the desulfurizer, slow diffusion speed of a shaft and the like. For a common oil well, at least about 2 weeks is needed from the start of casing dosing to the onset of effect at the wellhead. (2) The wellhead desulfurization equipment treatment is characterized by installing a desulfurization device at a wellhead, carrying out desulfurization treatment on associated gas (or oil well produced liquid), then conveying the associated gas to a metering room, mixing the associated gas with other produced liquid not containing hydrogen sulfide and the associated gas, and conveying the mixed liquid to a combined station. The method has quick effect, can realize standard treatment in a measurement room generally, but cannot realize the protection of a shaft string and oil well operators, and only belongs to front-end treatment and non-source treatment. Therefore, a source treatment mode with quick effect and good correspondence is urgently needed.
CN107913648A discloses a high-pressure pipeline gas-liquid reactor for oil well hydrogen sulfide treatment and a treatment method thereof, wherein the reactor consists of a gas supply unit, a dissolved gas mixed reaction unit and an automatic control unit; the automatic control unit detects the hydrogen sulfide content and the dissolved oxygen content of each node in the dissolved gas mixed reaction unit and controls the supply amount of the oxygen of each node of the dissolved gas mixed reaction unit. The invention adopts the pipeline reactor, the equipment is compact, and the occupied area is small; the automation degree is high, and the maintenance is convenient; the treatment is carried out under high pressure, and the processes of decompression release and pressurization output of the hydrogen sulfide gas are avoided, so that the energy consumption is low; the multi-stage gas supply is adopted, the gas distribution is uniform, the gas dissolving efficiency is high, the gas utilization rate is high, the treatment effect is good, and the removal rate of the hydrogen sulfide reaches more than 99.5 percent.
CN108708690A discloses device that oil well hydrogen sulfide automated inspection and intelligence added medicine were handled, the device comprises detecting element, adds medicine unit and PLC controller, and detecting element and medicine unit are installed respectively on the sleeve pipe gate valve at oil well sleeve pipe both ends, and PLC controller expert leads toAnd the detection unit and the dosing unit are respectively connected in a wired or wireless mode. The invention adopts the two-stage gas-liquid separation process of cyclone and stirring heating, and can effectively separate the hydrogen sulfide gas dissolved in the liquid, thereby greatly improving the detection accuracy of the hydrogen sulfide gas and reducing the detection error of the hydrogen sulfide by 20-35%; realizes automatic and accurate adjustment of the adding amount of the desulfurizer, and the content of hydrogen sulfide gas in the treated oil well reaches 0.5mg/m3The method completely meets the requirement of safe production concentration of the hydrogen sulfide in the oil well and has good treatment effect.
The invention relates to well mouth hydrogen sulfide treatment, which is characterized in that a desulfurization device is arranged at a well mouth, associated gas (or oil well produced liquid) is subjected to desulfurization treatment and then is conveyed to a metering room, and the associated gas is mixed with other produced liquid without containing hydrogen sulfide and associated gas and then conveyed to a combined station, but the protection of a shaft pipe column and oil well operators cannot be realized, and the method only belongs to front-end treatment and non-source treatment.
Disclosure of Invention
The invention aims to provide a device and a method for treating hydrogen sulfide at the bottom of an oil well, aiming at the defects of the existing oil well hydrogen sulfide treatment method. The device is characterized in that compressed air is conveyed to a downhole releaser through a capillary tube to be released, the released air is filled with an active reaction unit, the active reaction unit is contacted with produced liquid containing hydrogen sulfide flowing through, a catalytic oxidation reaction is carried out, the hydrogen sulfide is converted into sulfur, the sulfur enters a combined station along with the production of the produced liquid and is separated and treated in the form of suspended matters, and the air supply amount is automatically adjusted according to the detection result of the hydrogen sulfide. Solves the problems of complex process, huge equipment, long retention time, incomplete treatment, high cost and the like of the existing hydrogen sulfide treatment process.
Therefore, in order to achieve the above object, in one aspect, the present invention discloses an apparatus for downhole treatment of hydrogen sulfide in an oil well, comprising an air injection unit 1, an active reaction unit 2, and a detection control unit 3; the air injection unit 1 is connected with the active reaction unit 2 through a capillary tube and supplies air to the active reaction unit 2; the detection control unit 3 detects the content of the hydrogen sulfide in the oil pipe sampling port and controls the air supply amount of the air injection unit 1 according to the detected content of the hydrogen sulfide.
The active reaction unit 2 is composed of an outer cylinder 21, an inner cylinder 22, an air releaser 23 and a catalyst 24. The top and the bottom of the outer cylinder 21 and the inner cylinder 22 are connected by a partition plate, and the outer cylinder 21 and the inner cylinder 22 form a hollow cylindrical porous structure; a hollow cylindrical porous structure is filled with a catalyst 24, and air releasers 23 are uniformly arranged in the vertical direction; the air releasers 23 are connected by capillary tubes.
The air injection allocation unit 1 is composed of an air compressor 11, an air mass flow controller 12, a one-way valve 13, a stop valve 14 and a capillary 15. Wherein the air compressor 11 is connected with the air mass flow controller 12, the one-way valve 13 and the stop valve 14 in turn through an air pipeline, and the outlet of the stop valve 14 is connected with the air releaser 23 in the active reaction unit 2 through a packer by a capillary 15.
The detection control unit 3 is composed of a hydrogen sulfide detector 31 and a PLC 32. Wherein the hydrogen sulfide detector 31 is connected with a sampling valve on an oil pipe, the data of the hydrogen sulfide detector 31 is connected with the PLC 32 in a wired or wireless mode, and the PLC 32 is connected with the air injection allocation unit 1 in a wired or wireless mode.
The outlet pressure of the air compressor 11 is 10-30 MPa; the flow control range of the air mass flow controller 12 is 0-10Nm3H; the capillary 15 is made of 312L or 316L stainless steel, and has an inner diameter of 3-5mm and a wall thickness of 1-1.5 mm.
The active reaction unit 2 is fixed on the inner wall of the sleeve through a packer, and a plug is arranged at the lower part of the active reaction unit 2.
The outer cylinder 21 and the inner cylinder 22 form a hollow cylindrical porous structure with the aperture of 3-5mm and the hole spacing of 2-4 mm; the heights of the outer cylinder 21 and the inner cylinder 22 exceed the thickness of the oil layer perforated layer by 1-3 m.
The air releaser 23 is a ring structure, the inner diameter of which is the same as the inner diameter of the inner cylinder 22, and the outer diameter of which is the same as the inner diameter of the outer cylinder 21.
The spacing distance between the air releasers 23 is 10-30cm, and micropores with the aperture of 0.1-0.2mm are distributed on the annular structure of the air releasers 23.
The catalyst 24 is spherical particles and is uniformly distributed in the hollow cylindrical porous structure, and the diameter of the spherical particles is 6-10 mm.
The catalyst consists of an active component and an auxiliary agent component, wherein the active component is one or more of manganese, vanadium, iron, cobalt, nickel, copper, chromium, ruthenium and palladium, and the auxiliary agent component is one of oxides of aluminum, magnesium and zinc.
On the other hand, the invention discloses a method for treating the hydrogen sulfide bottom hole of an oil well, which specifically comprises the following steps:
(1) connecting the active reaction unit 2 with a packer, then connecting with an oil well pump, then connecting with an oil pipe, and putting the oil pipe into a position corresponding to an oil layer; after the capillary tube is connected with the active reaction unit, the capillary tube passes through the packer, and the packer is set.
(2) The capillary tube penetrating through the packer is connected with a stop valve 14 and a one-way valve 13 after penetrating out through a sleeve gate, then is connected with an air mass flow controller 12, and then is connected with an air compressor 11; the hydrogen sulfide detector 31 is installed on the oil pipe sampling valve and then connected with the PLC 32 in a wired or wireless mode.
(3) Starting an oil well for normal production, starting an air compressor 11 of the air injection allocation unit 1, opening an oil well produced liquid sampling valve, measuring the content of hydrogen sulfide in the oil well by a hydrogen sulfide detector 31, transmitting the detected data to a PLC 32 in a wired or wireless mode, and controlling the flow of the air quality flow controller 12 in a wired or wireless mode after processing.
(4) High-pressure compressed air output by the air compressor 11 is conveyed to the air releaser 23 of the active reaction unit 2 through the capillary 15, is released to the surface of the catalyst 24 through micropores on the surface of the air releaser, and is fully contacted and reacted with the produced liquid containing hydrogen sulfide produced from an oil layer, so that the hydrogen sulfide in the produced liquid is converted into sulfur and removed.
(5) The desulfurized produced liquid is subjected to hydrogen sulfide content detection again after being produced from the oil well, and if the desulfurized produced liquid does not meet the design requirement (the hydrogen sulfide content is less than or equal to 30 mg/m)3) Increasing the supply of airAnd (4) measuring until the treatment is qualified.
(6) When the produced liquid of the well does not contain hydrogen sulfide, the packer is unsealed, the oil pipe is lifted out, and the active reaction unit is lifted out of the oil well.
Compared with the prior art, the invention has the following advantages:
(1) the invention arranges the treatment node of hydrogen sulfide at the bottom of the well, realizes the source treatment and reduces the occupied area of equipment.
(2) The invention carries out the removal reaction of hydrogen sulfide gas under the high-pressure environment at the bottom of the oil well, greatly improves the solubility of hydrogen sulfide in produced liquid, solves the gas-liquid mass transfer control step which influences the reaction rate of hydrogen sulfide, and improves the desulfurization rate by more than 10-20 times.
(3) The invention adopts cheap air as a desulfurization medium and a catalyst as an auxiliary agent, and has the advantages of high desulfurization rate, low treatment cost and no pollution.
(4) The invention can realize quick feedback when the oil well bottom is desulfurized, and solves the problems of poor pertinence of the desulfurizer consumption and the treatment effect and slow feedback.
(5) The device has the advantages of high automation degree, safety, reliability and simple and convenient operation, management and maintenance, thereby having wide field popularization and application prospect.
Drawings
FIG. 1 is a schematic diagram and a flow chart of the apparatus of the present invention;
FIG. 2 is a front, cut away and top view of the air releaser of the device of the present invention.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
As shown in attached figures 1 and 2, the device for treating the hydrogen sulfide at the bottom of the oil well, disclosed by the invention, comprises an air distribution and injection unit 1, an active reaction unit 2 and a detection and control unit 3; the air injection unit 1 is connected with the active reaction unit 2 through a capillary tube and supplies air to the active reaction unit 2; the detection control unit 3 detects the content of the hydrogen sulfide in the oil pipe sampling port and controls the air supply amount of the air injection unit 1 according to the detected content of the hydrogen sulfide.
The active reaction unit 2 is composed of an outer cylinder 21, an inner cylinder 22, an air releaser 23 and a catalyst 24. The top and the bottom of the outer cylinder 21 and the inner cylinder 22 are connected by a partition plate, and the outer cylinder 21 and the inner cylinder 22 form a hollow cylindrical porous structure; a hollow cylindrical porous structure is filled with a catalyst 24, and air releasers 23 are uniformly arranged in the vertical direction; the air releasers 23 are connected by capillary tubes.
The air injection allocation unit 1 is composed of an air compressor 11, an air mass flow controller 12, a check valve 13, a stop valve 14 and a capillary tube 15. Wherein the air compressor 11 is connected with the air mass flow controller 12, the one-way valve 13 and the stop valve 14 in turn through an air pipeline, and the outlet of the stop valve 14 is connected with the air releaser 23 in the active reaction unit 2 through a packer by a capillary 15.
The detection control unit 3 is composed of a hydrogen sulfide detector 31 and a PLC controller 32. Wherein the hydrogen sulfide detector 31 is connected with a sampling valve on an oil pipe, the data of the hydrogen sulfide detector 31 is connected with the PLC 32 in a wired or wireless mode, and the PLC 32 is connected with the air injection allocation unit 1 in a wired or wireless mode.
Preferably, the outlet pressure of the air compressor 11 is 10-30MPa, more preferably 15-20 MPa; the flow control range of the air mass flow controller 12 is 0-10Nm3H, more preferably 3 to 5Nm3H is used as the reference value. The capillary 15 is made of 312L or 316L stainless steel, and has an inner diameter of 3-5mm and a wall thickness of 1-1.5 mm.
In the present invention, preferably, the active reaction unit 2 is fixed on the inner wall of the casing by a packer, and a plug is arranged at the lower part of the active reaction unit 2.
Preferably, the outer cylinder 21 and the inner cylinder 22 form a hollow cylindrical porous structure with a pore diameter of 3-5mm and a pore distance of 2-4mm, more preferably a pore diameter of 3.5-4.5mm and a pore distance of 2.5-3.5 mm.
Preferably, the heights of the outer cylinder 21 and the inner cylinder 22 exceed the thickness of the oil layer perforated layer by 1-3m, and more preferably by 1.5-2 m.
In the present invention, it is preferable that the air releaser 23 has a ring structure, the inner diameter of which is the same as the inner diameter of the inner cylinder 22, and the outer diameter of which is the same as the inner diameter of the outer cylinder 21.
Preferably, the air releasers 23 are spaced apart by 10-30cm, preferably 15-20 cm.
In the present invention, preferably, the annular structure of the air releaser 23 is distributed with micropores with the pore diameter of 0.1-0.2 mm.
Preferably, the catalyst 24 is spherical particles and is uniformly distributed in the hollow cylindrical porous structure.
In the present invention, the spherical particles preferably have a diameter of 6 to 10mm, more preferably 6 to 8 mm.
Preferably, the catalyst consists of an active component and an auxiliary component, wherein the active component is one or more of manganese, vanadium, iron, cobalt, nickel, copper, chromium, ruthenium and palladium, and the auxiliary component is one of oxides of aluminum, magnesium and zinc.
On the other hand, the invention discloses a method for treating the hydrogen sulfide bottom hole of an oil well, which specifically comprises the following steps:
(1) connecting the active reaction unit 2 with a packer, then connecting with an oil well pump, then connecting with an oil pipe, and putting the oil pipe into a position corresponding to an oil layer; after the capillary tube is connected with the active reaction unit, the capillary tube passes through the packer, and the packer is set.
(2) The capillary tube penetrating through the packer is connected with a stop valve 14 and a one-way valve 13 after penetrating out through a sleeve gate, then is connected with an air mass flow controller 12, and then is connected with an air compressor 11; the hydrogen sulfide detector 31 is installed on the oil pipe sampling valve and then connected with the PLC 32 in a wired or wireless mode.
(3) Starting an oil well for normal production, starting an air compressor 11 of the air injection allocation unit 1, opening an oil well produced liquid sampling valve, measuring the content of hydrogen sulfide in the oil well by a hydrogen sulfide detector 31, transmitting the detected data to a PLC 32 in a wired or wireless mode, and controlling the flow of the air quality flow controller 12 in a wired or wireless mode after processing.
(4) High-pressure compressed air output by the air compressor 11 is conveyed to the air releaser 23 of the active reaction unit 2 through the capillary 15, is released to the surface of the catalyst 24 through micropores on the surface of the air releaser, and is fully contacted and reacted with the produced liquid containing hydrogen sulfide produced from an oil layer, so that the hydrogen sulfide in the produced liquid is converted into sulfur and removed.
(5) The desulfurized produced liquid is subjected to hydrogen sulfide content detection again after being produced from the oil well, and if the desulfurized produced liquid does not meet the design requirement (the hydrogen sulfide content is less than or equal to 30 mg/m)3) The amount of air supplied is increased until the process is acceptable.
(6) When the produced liquid of the well does not contain hydrogen sulfide, the packer is unsealed, the oil pipe is lifted out, and the active reaction unit is lifted out of the oil well.
The invention conveys compressed air to a downhole releaser through a capillary tube for releasing, the released air is filled in an active reaction unit, contacts with produced liquid containing hydrogen sulfide flowing through the active reaction unit to generate catalytic oxidation reaction, the hydrogen sulfide is converted into sulfur, the sulfur enters a united station along with the production of the produced liquid and is separated and treated in the form of suspended matters, and the air supply quantity is automatically adjusted according to the detection result of the hydrogen sulfide. Solves the problems of complex process, huge equipment, long retention time, incomplete treatment, high cost and the like of the existing hydrogen sulfide treatment process.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Example 1
Well A of the Shengli oil field has the well depth of 800m, the oil layer thickness of 8m, the liquid amount of 20 square meters per day, the oil amount of 4 tons per day and the hydrogen sulfide content of 5000mg/m3The hydrogen sulfide is treated by a shaft bottom treatment device, the outlet pressure of an air compressor is 10MPa, and the flow of an air mass flow controller is 1.0Nm3The capillary tube is made of 312L stainless steel, and has an inner diameter of 3mm and a wall thickness of 1 mm. The aperture of the cylindrical surfaces of the outer cylinder and the inner cylinder of the active reaction unit is 3mm, and the distance between the apertures is 2 mm. The height of the outer cylinder and the inner cylinder is 1m higher than that of the oil layer. The air releaser is a ring structure, the inner diameter of the air releaser is the same as the inner diameter of the inner cylinder, and the outer diameter of the air releaser is the same as the inner diameter of the outer cylinder. The spacing distance between the air releasers is 10cm, and micropores with the aperture of 0.1mm are distributed on the annular structure of the air releasers. The catalyst is spherical particles which are uniformly distributed in the hollow cylindrical porous structure, and the diameter of the spherical particles is 6 mm. The catalyst consists of an active component and an auxiliary agent component, wherein the active component is composed of manganese and vanadium, and the auxiliary agent component is an oxide of aluminum. The content of hydrogen sulfide after treatment is 10-20mg/m3。
Example 2
Well B of the Shengli oil field, the well depth is 1000m, the oil layer thickness is 9m, the liquid amount is 26 square/day, the oil amount is 3.5 ton/day, and the hydrogen sulfide content is 10000mg/m3Hydrogen sulfide treatment is carried out by adopting a shaft bottom treatment device, the outlet pressure of an air compressor is 15MPa, and the flow of an air mass flow controller is 3Nm3The capillary tube is made of 312L stainless steel, and has an inner diameter of 3.5mm and a wall thickness of 1.1 mm. The aperture of the cylindrical surfaces of the outer cylinder and the inner cylinder of the active reaction unit is 3.5mm, and the hole spacing is 2.5 mm. The height of the outer cylinder and the inner cylinder is 1.5m higher than that of the oil layer. The air releaser is a ring structure, the inner diameter of the air releaser is the same as the inner diameter of the inner cylinder, and the outer diameter of the air releaser is the same as the inner diameter of the outer cylinder. The distance between the air releasers is 15cm, and the air is dischargedMicropores with the aperture of 0.13mm are distributed on the annular structure of the releaser. The catalyst is spherical particles which are uniformly distributed in the hollow cylindrical porous structure, and the diameter of the spherical particles is 7 mm. The catalyst consists of an active component and an auxiliary agent component, wherein the active component consists of iron and cobalt, and the auxiliary agent component is an oxide of magnesium. The content of hydrogen sulfide after treatment is 10-25mg/m3。
Example 3
Well C of the Shengli oil field, the well depth is 1500m, the oil layer thickness is 10m, the liquid amount is 30 square/day, the oil amount is 4.5 tons/day, the hydrogen sulfide content is 15000mg/m3Hydrogen sulfide treatment is carried out by adopting a shaft bottom treatment device, the outlet pressure of an air compressor is 20MPa, and the flow of an air mass flow controller is 5Nm3The capillary tube is made of 312L stainless steel, and has an inner diameter of 4mm and a wall thickness of 1.3 mm. The aperture of the cylindrical surfaces of the outer cylinder and the inner cylinder of the active reaction unit is 4mm, and the distance between the holes is 3 mm. The height of the outer cylinder and the inner cylinder is 2.0m higher than that of the oil layer. The air releaser is a ring structure, the inner diameter of the air releaser is the same as the inner diameter of the inner cylinder, and the outer diameter of the air releaser is the same as the inner diameter of the outer cylinder. The spacing distance between the air releasers is 20cm, and micropores with the aperture of 0.15mm are distributed on the annular structure of the air releasers. The catalyst is spherical particles which are uniformly distributed in the hollow cylindrical porous structure, and the diameter of the spherical particles is 8 mm. The catalyst consists of an active component and an auxiliary agent component, wherein the active component consists of nickel and copper, and the auxiliary agent component is an oxide of aluminum. The content of hydrogen sulfide after treatment is 20-30mg/m3。
Example 4
Well D of the Shengli oil field, the well depth is 2000m, the oil layer thickness is 12m, the liquid amount is 33 square/day, the oil amount is 5.5 ton/day, and the hydrogen sulfide content is 20000mg/m3The hydrogen sulfide is treated by a shaft bottom treatment device, the outlet pressure of an air compressor is 25MPa, and the flow of an air mass flow controller is 7Nm3The capillary tube is made of 316L stainless steel, and has an inner diameter of 4.5mm and a wall thickness of 1.4 mm. The aperture of the cylindrical surfaces of the outer cylinder and the inner cylinder of the active reaction unit is 4.5mm, and the hole distance is 3.5 mm. The height of the outer cylinder and the inner cylinder is 2.5m higher than that of the oil layer. The air releaser is a ring structure, the inner diameter of the air releaser is the same as the inner diameter of the inner cylinder, and the outer diameter of the air releaser is the same as the inner diameter of the outer cylinder. The interval distance between the air releasers is 25cm, and the air releasers are annular knotsMicropores with the aperture of 0.18mm are distributed on the structure. The catalyst is spherical particles which are uniformly distributed in the hollow cylindrical porous structure, and the diameter of the spherical particles is 9 mm. The catalyst consists of an active component and an auxiliary component, wherein the active component is chromium and ruthenium, and the auxiliary component is an oxide of aluminum. The content of hydrogen sulfide after treatment is 20-30mg/m3。
Example 5
Well C of the Shengli oil field, the well depth is 2500m, the oil layer thickness is 15m, the liquid amount is 60 square/day, the oil amount is 8 ton/day, and the hydrogen sulfide content is 30000mg/m3Hydrogen sulfide treatment is carried out by adopting a shaft bottom treatment device, the outlet pressure of an air compressor is 30MPa, and the flow of an air mass flow controller is 10Nm3The capillary tube is made of 316L stainless steel, and has an inner diameter of 5mm and a wall thickness of 1.5 mm. The aperture of the cylindrical surfaces of the outer cylinder and the inner cylinder of the active reaction unit is 5mm, and the distance between the holes is 4 mm. The height of the outer cylinder and the inner cylinder is 3.0m higher than that of the oil layer. The air releaser is a ring structure, the inner diameter of the air releaser is the same as the inner diameter of the inner cylinder, and the outer diameter of the air releaser is the same as the inner diameter of the outer cylinder. The spacing distance between the air releasers is 30cm, and micropores with the aperture of 0.2mm are distributed on the annular structure of the air releasers. The catalyst is spherical particles which are uniformly distributed in the hollow cylindrical porous structure, and the diameter of the spherical particles is 10 mm. The catalyst consists of an active component and an auxiliary agent component, wherein the active component consists of chromium and palladium, and the auxiliary agent component is an oxide of zinc. The content of hydrogen sulfide after treatment is 10-15mg/m3。
Claims (18)
1. The device for treating the hydrogen sulfide well bottom of the oil well is characterized by comprising an air injection unit, an active reaction unit and a detection control unit; the air injection unit is connected with the active reaction unit through a capillary tube and provides air for the active reaction unit; the detection control unit detects the content of hydrogen sulfide in the sampling port of the oil pipe and controls the air supply amount of the air injection unit according to the detected content of the hydrogen sulfide;
the active reaction unit consists of an outer cylinder, an inner cylinder, an air releaser and a catalyst; the top and the bottom of the outer cylinder and the inner cylinder are connected by a partition board, the outer cylinder and the inner cylinder form a hollow cylindrical porous structure, a catalyst is filled in the hollow cylindrical porous structure, and air releasers are uniformly arranged along the vertical direction; the air releasers are connected through capillary tubes.
2. The apparatus of claim 1 wherein said air injection unit comprises of an air compressor, air mass flow controller, check valve, shut-off valve and capillary tubing; the air compressor machine pass through the trachea way and link to each other with air mass flow controller, check valve, stop valve in proper order, the export of stop valve passes through the capillary and links to each other with the air release ware through the packer.
3. The apparatus for downhole treatment of hydrogen sulfide in oil wells according to claim 1, wherein said detection control unit comprises a hydrogen sulfide detector and a PLC controller; the hydrogen sulfide detector is connected with a sampling valve on the oil pipe, the data of the hydrogen sulfide detector is connected with the PLC in a wired or wireless mode, and the PLC is connected with the air injection allocation unit in a wired or wireless mode.
4. An apparatus for downhole processing of hydrogen sulfide in an oil well according to claim 1, wherein the active reaction unit is fixed to the inner wall of the casing by a packer, and a stopper is provided at a lower portion of the active reaction unit.
5. The apparatus of claim 1, wherein the outer and inner cylinders form a hollow cylindrical porous structure with a pore size of 3-5mm and a pore spacing of 2-4 mm.
6. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 1, wherein the height of the outer and inner cylinders exceeds the thickness of the perforated layer of the oil reservoir by 1-3 m.
7. An apparatus as claimed in claim 1 wherein said air releaser is of annular configuration having an inside diameter equal to the inside diameter of the inner barrel and an outside diameter equal to the inside diameter of the outer barrel.
8. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 7 wherein said air releaser annulus is perforated with pores having a diameter of 0.1-0.2 mm.
9. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 7 wherein said air releases are spaced apart by a distance of 10-30 cm.
10. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 1, wherein said catalyst is in the form of spherical particles and is uniformly distributed within the interior of the hollow cylindrical porous structure.
11. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 10, wherein said spherical particles have a diameter of 6-10 mm.
12. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 1 or 10, wherein said catalyst is comprised of an active component and an auxiliary component.
13. The apparatus of claim 12 wherein the active component is one or more of manganese, vanadium, iron, cobalt, nickel, copper, chromium, ruthenium, and palladium.
14. An apparatus for downhole processing of hydrogen sulfide for an oil well according to claim 12, wherein said auxiliary component is one of oxides of aluminum, magnesium and zinc.
15. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 2, wherein the outlet pressure of said air compressor is 10-30 MPa.
16. An apparatus for downhole processing of hydrogen sulfide for an oil well according to claim 2, wherein said air mass flow controller has a flow control range of 0-10Nm3/h。
17. An apparatus for downhole treatment of hydrogen sulfide in an oil well according to claim 2, wherein said capillary is made of stainless steel 312L or 316L, and has an inner diameter of 3-5mm and a wall thickness of 1-1.5 mm.
18. A method of treating an oil well with hydrogen sulfide downhole as claimed in any one of claims 1 to 17, the method comprising in particular the steps of:
(1) connecting the active reaction unit with a packer, then connecting with an oil well pump, then connecting with an oil pipe, and putting the oil pipe into a position corresponding to an oil layer; after the capillary tube is connected with the active reaction unit, the capillary tube passes through the packer, and the packer is set;
(2) the capillary tube penetrating through the packer is connected with a stop valve and a one-way valve after penetrating out of the casing valve, then is connected with an air mass flow controller and then is connected with an air compressor; installing a hydrogen sulfide detector on an oil pipe sampling valve, and connecting the hydrogen sulfide detector with a PLC (programmable logic controller) in a wired or wireless manner;
(3) starting an oil well for normal production, starting an air compressor of an air injection allocation unit, opening an oil well produced liquid sampling valve, measuring the content of hydrogen sulfide in the oil well by a hydrogen sulfide detector, transmitting the detected data to a PLC (programmable logic controller) in a wired or wireless manner, and controlling the flow of an air quality flow controller in a wired or wireless manner after processing;
(4) high-pressure compressed air output by an air compressor is conveyed to an air releaser of an active reaction unit through a capillary tube, is released to the surface of a catalyst through micropores on the surface of the air releaser, and is fully contacted and reacted with produced liquid containing hydrogen sulfide produced from an oil layer, so that the hydrogen sulfide in the produced liquid is converted into sulfur and removed;
(5) production after desulfurizationDetecting the content of hydrogen sulfide after the effluent is produced from the oil well, if the effluent does not meet the design requirement (the content of hydrogen sulfide is less than or equal to 30 mg/m)3) Increasing the air supply amount until the treatment is qualified;
(6) when the produced liquid of the well does not contain hydrogen sulfide, the packer is unsealed, the oil pipe is lifted out, and the active reaction unit is lifted out of the oil well.
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| CN114876429A (en) * | 2022-05-24 | 2022-08-09 | 中国海洋石油集团有限公司 | Method for exploiting heavy oil reservoir by utilizing catalytic thermogenesis of wellbore |
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