CN111594110A - Gas-liquid mixed injection device for double-injection dilution of thickened oil - Google Patents
Gas-liquid mixed injection device for double-injection dilution of thickened oil Download PDFInfo
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- CN111594110A CN111594110A CN202010446738.6A CN202010446738A CN111594110A CN 111594110 A CN111594110 A CN 111594110A CN 202010446738 A CN202010446738 A CN 202010446738A CN 111594110 A CN111594110 A CN 111594110A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
- C10G11/04—Oxides
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
Abstract
The invention relates to a gas-liquid mixed injection device for double injection and dilution of thickened oil. The technical scheme is as follows: the double-head liquid injector comprises a double-head liquid injector and a gas-liquid mixed injector, wherein an injector body of the double-head liquid injector is of an annular sleeve structure, liquid injection channels are respectively arranged at the upper part and the lower part of the injector body, a sealing steel ball and a supporting spring are arranged in an inner cavity of each liquid injection channel, a liquid outlet channel is arranged between the liquid injection channel of the upper liquid injector and the liquid injection channel of the lower liquid injector, and the other end of each liquid outlet channel is communicated with the gas-liquid; one end of a liquid inlet slotted pipe of the gas-liquid mixing injector is connected to the bottom of the oil pumping pump barrel, a gas-liquid homogenizing chamber is formed between the gas guide plate and the gas-liquid homogenizing plate, and a multi-stage capillary is arranged below the gas-liquid homogenizing plate and communicated with a lower cavity of the mixing injector. The beneficial effects are that: the special gas-liquid mixed injection device can realize double injection and thin recovery of the thickened oil, so that the thickened oil is qualitatively changed in an oil reservoir, namely the physical fluidity of the thickened oil is enhanced, the operation effect is greatly improved, and the operation period is prolonged by more than 2-3 times.
Description
Technical Field
The invention relates to a thickened oil exploitation device and a thickened oil exploitation method, in particular to a gas-liquid mixed injection device for double injection and dilution of thickened oil.
Background
In the process of oil exploitation, the heavy oil has large intermolecular force, high freezing point and high viscosity due to molecular weight, so that the heavy oil is difficult to exploit, at present, the heavy oil exploitation method comprises hot water circulation viscosity reduction, electric heating viscosity reduction, in-situ combustion, hot water flooding, steam huff and puff, steam flooding, chemical methods and the like, at present, the adopted method mainly comprises gas injection and high-temperature CO2 injection, and the thinner heavy oil in some heavy oil is exploited in a stewing mode, but in the exploitation process, the wax deposition phenomenon occurs due to the temperature change, so that great difficulty is brought to exploitation.
Chinese patent publication No. CN1915488, with patent name of catalyst for catalytic viscosity reduction of underground heavy oil by hydrothermal cracking, is a powdery substance prepared by mixing silica-alumina gel or alumina, clay and solid superacid, and comprises the following components (by weight percent): 2-60% of silica-alumina gel or alumina, 5-50% of clay and 5-60% of solid super acid. Under the action of steam, the invention can perform in-situ catalytic cracking on the thick oil under an oil well, improve the viscosity of crude oil, reduce the viscosity by about 60 percent, and realize the dilution of the thick oil by combining steam and a chemical method.
In the prior art, paraffin oil in thin oil can be decomposed into short chains by chemical reaction, and the paraffin oil is mainly a liquid paraffin mixture containing 17 carbon atoms and above, and the chemical formula is as follows: c17H36→C8H18+C9H18C8H18→C4H10+C4H8
In the chemical process of exploiting thick oil, Al is used as catalyst2O3Due to Al2O3The particularity of (2) is inconvenient for direct injection into oil layer, for this reason, we can design a method for injecting NaAlO2By means of a (i.e. sodium metaaluminate) solution, by reinjection of CO2Gas, chemical reaction downhole to produce Al2O3Reuse of CO2The high temperature of the gas causes part of long chains in the thick oil to be cracked into short chains, and the generated short chains can also be used as a dissolving agent to dissolve the thick oil, thereby realizing the thin exploitation of the thick oil.
The specific reaction formula is as follows: 2NaAlO2+2CO2+H2O= Al2O3+2NaHCO3。
Therefore, it is necessary to design a special device and method to fulfill the above-mentioned requirement of thick oil recovery.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a gas-liquid mixed injection device for double injection and dilution of thickened oil.
The invention provides a gas-liquid mixed injection device for double injection and dilution of thickened oil, which adopts the technical scheme that: comprises a double-end injector (6) and a gas-liquid mixed injector (5), wherein the double-end injector (6) comprises an injector body (6.1), an injector injection port (6.2), a supporting spring (6.3), a sealing steel ball (6.4) and a sealing rubber ring (6.5), the injector body (6.1) is of an annular sleeve structure, a plurality of upper injector injection channels (6.6) are arranged on the upper surface of the injector body (6.1), a plurality of lower injector injection channels (6.2) are arranged on the lower surface of the injector body (6.1), an upper sealing steel ball (6.4) and an upper supporting spring (6.3) are arranged in an inner cavity of the upper injector injection channel (6.6), a lower sealing steel ball (6.7) and a lower supporting spring (6.8) are arranged in an inner cavity of the lower injector injection channel (6.2), and a liquid outlet channel (6.9) is arranged between the upper injector channel (6.6) and the lower injector channel (6.2), one end of the liquid outlet channel (6.9) is communicated with the liquid injection channel (6.6) of the upper liquid injector and the liquid injection channel (6.2) of the lower liquid injector, and the other end is communicated with the gas-liquid mixing injector (5);
the gas-liquid mixing injector (5) comprises a liquid inlet slotted pipe (5.1), a carrier (5.2), a gas-liquid homogenizing chamber (5.3), a gas guide plate (5.4), a gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6), a mixing injector lower cavity (5.7) and a lower connector (5.8), one end of the liquid inlet slotted pipe (5.1) is connected with the bottom of the oil pump barrel (7), and the side wall of the liquid inlet slotted pipe (5.1) is communicated with a liquid outlet channel (6.9) of the double-head liquid injector (6), the other end of the liquid inlet slotted pipe (5.1) is provided with a round gas guide plate (5.4), a gas-liquid homogenizing chamber (5.3) is formed between the gas guide plate (5.4) and the gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6) is arranged below the gas-liquid homogenizing plate (5.5) and is communicated with a lower cavity (5.7) of the mixing injector, the bottom of the lower cavity (5.7) of the mixing injector is provided with a lower connector (5.8) for connecting a tail pipe (4) under the pump.
Preferably, the flow direction of the liquid outlet channel (6.9) is parallel to the axial section.
Preferably, the length of the multistage capillary tube (5.6) accounts for at least one third of the length of the gas-liquid mixing injector (5), the upper end of the multistage capillary tube is communicated with the gas-liquid homogenizing chamber (5.3), and the lower end of the multistage capillary tube is communicated with the lower cavity (5.7) of the mixing injector.
The invention provides another thickened oil double-injection thin-oil gas-liquid mixed injection device, which adopts the technical scheme that: comprises a double-end injector (6) and a gas-liquid mixed injector (5), wherein the double-end injector (6) comprises an injector body (6.1), an injector injection port (6.2), a supporting spring (6.3), a sealing steel ball (6.4) and a sealing rubber ring (6.5), the injector body (6.1) is of an annular sleeve structure, a plurality of upper injector injection channels (6.6) are arranged on the upper surface of the injector body (6.1), a plurality of lower injector injection channels (6.2) are arranged on the lower surface of the injector body (6.1), an upper sealing steel ball (6.4) and an upper supporting spring (6.3) are arranged in an inner cavity of the upper injector injection channel (6.6), a lower sealing steel ball (6.7) and a lower supporting spring (6.8) are arranged in an inner cavity of the lower injector injection channel (6.2), and a liquid outlet channel (6.9) is arranged between the upper injector channel (6.6) and the lower injector channel (6.2), one end of the liquid outlet channel (6.9) is communicated with the liquid injection channel (6.6) of the upper liquid injector and the liquid injection channel (6.2) of the lower liquid injector, and the other end is communicated with the gas-liquid mixing injector (5);
the gas-liquid mixing injector (5) comprises a liquid inlet slit pipe (5.1), a carrier (5.2), a gas-liquid homogenizing chamber (5.3), a gas guide plate (5.4), a gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6), a mixing injector lower cavity (5.7), a lower connector (5.8) and a mixing injector middle cavity (5.9), wherein one end of the liquid inlet slit pipe (5.1) is connected to the bottom of the oil pumping cylinder (7), the side wall of the liquid inlet slit pipe (5.1) is communicated with a liquid outlet channel (6.9) of the double-head injector (6), a round gas guide plate (5.4) is arranged at the other end of the liquid inlet slit pipe (5.1), the gas-liquid homogenizing chamber (5.3) is formed between the gas guide plate (5.4) and the gas-liquid homogenizing plate (5.5), the multi-stage capillary (5.6) of the liquid inlet slit pipe (5.1) is communicated with the mixing injector middle cavity (5.9), and the mixing injector middle cavity (5.9) is communicated with the multi-stage capillary below the mixing injector lower cavity (5.9), the bottom of the lower cavity (5.7) of the mixing injector is provided with a lower connector (5.8) for connecting a tail pipe (4) under the pump.
The invention has the following beneficial effects:
1. the special gas-liquid mixed injection device of the invention is designed, so that the double injection and thin extraction process of the thickened oil can be realized, the thickened oil is subjected to qualitative change in an oil reservoir, namely the physical fluidity of the thickened oil is enhanced, the operation effect is greatly improved, and the operation period is prolonged by more than 2-3 times;
2. because the double injection of gas and liquid is adopted, and the thick oil cracking mode is adopted, the stability of oil pumping and oil transportation is greatly improved, namely the difficulty of blockage caused by wax deposition in the oil pumping and oil transportation is reduced, and the oil pumping and oil transportation is facilitated;
3. because of gas-liquid double injection, the gas injection has pressure-free adsorption effect, so that NaAlO in the oil well casing pipe2The solution is easy to suck away, and the double-head liquid injector is one-way, so the sleeve is not easy to corrode, and NaAlO2Being basic, CO2Is an acid gas, the use of this process is more beneficial for the protection of the casing (i.e., the well) than a single shot.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the double-head injector;
FIG. 3 is a schematic structural view of a first embodiment of the gas-liquid injector;
FIG. 4 is a schematic view of the structure A-A of the gas-liquid mixing injector;
FIG. 5 is a schematic structural view of a second embodiment of the gas-liquid injector;
FIG. 6 is a schematic view of the pump lower tail pipe;
FIG. 7 is a schematic structural diagram of a sodium metaaluminate solution configurator;
in the upper diagram: an oil well casing 1, an oil reservoir 2, a high-temperature packer 3, a pump lower tail pipe 4, a gas-liquid mixing injector 5, a double-head injector 6, an oil pumping cylinder 7, an oil pumping pump plunger 8, an injection and production string 9 and an oil pumping rod 10,
an injector body 6.1, an injector injection passage 6.2, a supporting spring 6.3, an upper sealing steel ball 6.4, a sealing rubber ring 6.5, an upper injector injection passage 6.6, a lower sealing steel ball 6.7, a lower supporting spring 6.8 and a liquid outlet passage 6.9,
a liquid inlet slotted pipe 5.1, a carrier 5.2, a gas-liquid homogenizing chamber 5.3, a gas guide plate 5.4, a gas-liquid homogenizing plate 5.5, a multistage capillary 5.6, a lower cavity body 5.7 of a mixing injector and a lower connector 5.8,
a tail pipe body 4.1, a seat seal shear pin 4.2, a ball seat 4.3, a tail pipe seal steel ball 4.4, a seal rubber ring 4.5, a limit seat 4.6, a naked hole 4.7 and a liquid passing hole 4.8,
a reactor a1, a kettle cover a2, a stirrer a3, a condensed water outlet 1.1, a condensed water inlet 1.2, a condensing container 1.3, a reaction container 1.4, sodium metaaluminate solution 1.5 and a sodium hydroxide solution inlet and outlet 1.6,
a stirring shaft 3.1, a power gear 3.2, a bearing seat 3.3, a rotating bearing 3.4, a stirring actuator 3.5 and an aluminum oxide inlet and outlet hole 3.6.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
referring to attached drawings 3-4, the gas-liquid mixing injector (5) comprises a liquid inlet slotted pipe (5.1), a carrier (5.2), a gas-liquid homogenizing chamber (5.3), a gas guide plate (5.4), a gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6), a mixing injector lower cavity (5.7) and a lower connector (5.8), one end of the liquid inlet slotted pipe (5.1) is connected to the bottom of the oil pumping barrel (7), the side wall of the liquid inlet slotted pipe (5.1) is communicated with a liquid outlet channel (6.9) of the double-end injector (6), a round gas guide plate (5.4) is arranged at the other end of the liquid inlet slotted pipe (5.1), the gas-liquid homogenizing chamber (5.3) is formed between the gas guide plate (5.4) and the gas-liquid homogenizing plate (5.5), the multi-stage capillary (5.6) is communicated with the mixing injector lower cavity (5.7) below the gas-liquid homogenizing plate (5.5.5), and the mixing injector lower cavity (5.7) is provided with the lower connector (5.8), used for connecting a tail pipe (4) under the pump.
Preferably, the flow direction of the liquid outlet channel (6.9) is parallel to the axial section.
Preferably, the length of the multistage capillary tube (5.6) accounts for at least one third of the length of the gas-liquid mixing injector (5), the upper end of the multistage capillary tube is communicated with the gas-liquid homogenizing chamber (5.3), and the lower end of the multistage capillary tube is communicated with the lower cavity (5.7) of the mixing injector.
In addition, referring to the attached figures 1-4 and 6-7, the invention is applied to a thickened oil double-injection thin-production device, an injection-production string 9 is arranged in an inner cavity of an oil well casing 1, a sucker rod 10 is arranged in the injection-production string 9, an oil-well pump plunger 8 is arranged at the bottom of the sucker rod 10, an oil-well pump barrel 7 is arranged at the bottom of the oil well casing 1, the oil-well pump plunger 8 is matched with the oil-well pump barrel 7 to realize liquid production, the bottom of the oil-well pump barrel 7 is connected with a gas-liquid mixing injector 5, a pump lower tail pipe 4 is arranged at the bottom of the gas-liquid mixing injector 5, a double-end liquid injector 6 is sleeved on the outer walls of the oil-well pump barrel 7 and the gas-liquid mixing injector 5;
injecting the prepared sodium metaaluminate solution into a cavity between the oil well casing 1 and the injection and production tubular column 9 through a sodium metaaluminate solution configurator arranged on the ground, and injecting the prepared sodium metaaluminate solution into the gas-liquid mixing injector 5 through a double-head injector 6; in addition, the plunger 8 of the oil well pump is lifted up for a short distance, high-temperature carbon dioxide gas is injected through the injection and production pipe column 9, the carbon dioxide gas enters the gas-liquid mixing injector 5 along the oil well pump barrel 7, the carbon dioxide gas and the sodium metaaluminate solution react to generate aluminum oxide, the aluminum oxide is then put into the oil reservoir 2 along the pump lower tail pipe 4, and the well is stewed for a period of time, so that partial long chains in the heavy oil are cracked into short chains, and then the thin production of the heavy oil is realized.
In addition, the flow direction of the liquid outlet channel 6.9 is parallel to the axial section, so that the liquid outlet channel is more fully contacted with the carbon dioxide gas.
Referring to the attached drawing 6, the pump lower tail pipe 4 comprises a tail pipe body 4.1, seat seal shear pins 4.2, a ball seat 4.3, seal steel balls 4.4, a seal rubber ring 4.5 and a limiting seat 4.6, wherein the ball seat 4.3 is installed in an inner cavity at the upper end of the tail pipe body 4.1 through the seat seal shear pins 4.2, the tail pipe seal steel balls 4.4 are installed in the ball seat 4.3, the limiting seat 4.6 is arranged at the lower end of the tail pipe body 4.1, and bare holes 4.7 are distributed in the tail pipe body 4.1, so that the pump lower tail pipe has a homogenizing effect in the injection process and can be used as an oil extraction channel during oil extraction.
In addition, the limiting seat 4.6 is provided with a liquid passing hole 4.8, and the generated aluminum oxide, liquid and high-temperature carbon dioxide can enter the oil reservoir below along the liquid passing hole.
Referring to the attached figure 7, the sodium metaaluminate solution configurator provided by the invention comprises a reactor a1, a kettle cover a2 and a stirrer a3, wherein the upper part of the reactor a1 is provided with the kettle cover a2, the inner cavity of the reactor a1 is provided with the stirrer a3, the reactor a1 comprises a condensed water outlet 1.1, a condensed water inlet 1.2, a condenser 1.3, a reaction container 1.4, a sodium metaaluminate solution outlet 1.5 and a sodium hydroxide solution inlet/outlet 1.6, the condenser 1.3 is sleeved outside the reaction container 1.4, the lower side of the condenser 1.3 is provided with the condensed water inlet 1.2, the upper side of the condensed water outlet 1.1, the lower side of the reaction container 1.4 is provided with the sodium hydroxide solution inlet/outlet 1.6, and the middle part of the reaction container 1.4 is provided with the sodium metaaluminate solution outlet 1.5.
Preferably, the stirrer a3 comprises a stirring shaft 3.1, a power gear 3.2, a bearing seat 3.3, a rotating bearing 3.4, a stirring actuator 3.5 and an aluminum oxide inlet/outlet hole 3.6, wherein the stirring shaft 3.1 is of a hollow shaft structure, the outer side of the lower part of the stirring shaft 3.1 is provided with a plurality of stirring actuators 3.5, the upper part of the stirring shaft 3.1 is connected with the rotating bearing 3.4 through the bearing seat 3.3, the power gear 3.2 is arranged above the rotating bearing 3.4, the aluminum oxide inlet/outlet hole 3.6 is arranged at the lower side of the stirring shaft 3.1, the aluminum oxide is placed in the stirring shaft 3.1, and the aluminum oxide reacts with a sodium hydroxide solution to generate a sodium metaaluminate solution for downhole use.
The invention is applied to a thickened oil double-injection thin-extraction device, and the using method comprises the following steps:
firstly, preparing a sodium metaaluminate solution beside a ground wellhead: placing flocculent aluminum oxide in a sodium metaaluminate solution preparation device, adding a NaOH solution into the sodium metaaluminate solution preparation device, and stirring through a stirring shaft 3.1 until flocculent disappears completely to generate a sodium metaaluminate solution; a condensing container 1.3 is required to be arranged on the outer side of the sodium metaaluminate solution configurator, cold water enters through a condensed water inlet 1.2 and flows out through a condensed water outlet 1.1 to cool the reactor a 1;
secondly, connecting a high-temperature packer 3, a pump lower tail pipe 4, a gas-liquid mixing injector 5, a double-end injector 6 and an oil pumping pump barrel 7 to the lower end of an injection and production string 9, then putting the packer into an oil well casing 1, carrying out setting firstly, setting the high-temperature packer 3 by pressing, breaking a setting shear pin 4.2, enabling a ball seat 4.3 and a tail pipe sealing steel ball 4.4 to fall on a limiting seat 4.6, completing setting, opening an injection and production channel, and then putting an oil pumping pump plunger 8 and an oil pumping rod 10;
thirdly, starting double injection of sodium metaaluminate solution and carbon dioxide gas: lifting the sucker rod 10 to make the plunger 8 of the oil pump slightly leave a little of the oil pump barrel 7, namely creating a double-injection pipe column form, on one hand, making the injection and production pipe column 9 and the gas-liquid mixing injector 5 communicated with the gas-liquid mixing injector 5, on the other hand, making the cavity between the oil well casing 1 and the injection and production pipe column 9 communicated with the cavity through the double-head injector 6; after the double-injection pipe column is built, after a small amount of high-temperature carbon dioxide gas is injected into the injection and production pipe column 9 through a small four-way of the well mouth, a large four-way valve of the well mouth is opened, and the in-situ prepared sodium metaaluminate solution is injected into the oil well casing 1, wherein the high-temperature carbon dioxide gas enters the gas-liquid mixing injector 5 along the injection and production pipe column 9, the sodium metaaluminate solution enters the double-head injector 6 along a cavity between the oil well casing 1 and the injection and production pipe column 9, the double-head injector 6 not only changes the flow direction of the liquid and changes the longitudinal flow into the transverse flow, but also enters the gas-liquid mixing injector 5 in multiple strands to be fully contacted with the high-temperature carbon dioxide gas coming from the top, so that the reaction efficiency is improved, and the aluminum oxide generated by the reaction of the gas-liquid mixing; stopping injecting the sodium metaaluminate solution when the design amount is reached, continuously injecting high-temperature carbon dioxide gas, and stopping injecting gas when the design requirement is reached;
and fourthly, after stopping injection, closing a valve to carry out soaking for 1-2 days, carrying out cracking reaction on the generated aluminum oxide serving as a catalyst and the thick oil at high temperature, cracking partial long chains of the thick oil into short chains so as to thin the thick oil, carrying out oil extraction after the soaking is finished, and at the moment, lowering the plunger 8 of the oil well pump into the oil well pump cylinder 7 to carry out trial pumping and starting oil extraction operation.
It should be noted that: in the gas-liquid mixing injector 5, high-temperature carbon dioxide gas firstly enters a gas-liquid homogenizing chamber 5.3 along a gas guide plate 5.4, and sodium metaaluminate solution transversely enters the gas-liquid mixing injector 5 through a liquid inlet slotted pipe 5.1 and enters the gas-liquid homogenizing chamber 5.3 along the gas guide plate 5.4, at the moment, the sodium metaaluminate solution reacts with the high-temperature carbon dioxide gas and continuously flows downwards along a multistage capillary 5.6 while reacting to generate aluminum oxide through sufficient combination reaction, the generated aluminum oxide is conveyed to the space at the lower part of a tail pipe 4 of a pump and then enters an oil reservoir 2 to react with thick oil.
In addition, the function of the materials in the invention is as follows:
1. NaAlO2the solution has the main function of carrying Al in the process2O3Through multi-distribution reaction, the catalyst Al required by thick oil cracking is generated underground2O3Mainly due to Al2O3Is not easy to be evenly distributed into the oil reservoir in the well, and NaAlO2Being basic, it is possible to neutralize: CO22Acidity of the aqueous solution.
2. The high-temperature carbon dioxide gas has the functions of carrying energy and heating the oil reservoir, and simultaneously, a large amount of high-temperature CO2Dissolving in thick oil to thin the thick oil for easy exploitation, and CO2With NaAlO2Reaction to Al2O3I.e. CO2Or Al2O3The above composition is used as a composition.
3. Al2O3At the following stage: c17H36→C8H18+C9H18The catalyst is used in the reaction, so that the heavy oil in the oil reservoir can be thinned through chemical reaction, and the exploitation is facilitated.
4. The key of the gas-liquid double injection is a gas-liquid mixing injector 5, and NaAlO is required to be added into the gas-liquid mixing injector 52With CO2Mixing thoroughly to obtain 2NaAlO2+2CO2+H2O=Al2O3+2NaHCO3Can be more sufficient, is specially designed with a multi-stage capillary tube, improves the efficiency of the mixing reaction, and generates Al2O3The floccules are sent to a heavy oil reservoir underground.
5. To make 2NaAlO2+2CO2+H2O=Al2O3+2NaHCO3Reaction is complete, NaAlO2The solution is more stable to be taken in and is beneficial to CO2The gas contacts, so a special double-end injector 6 is designed, the sodium metaaluminate solution can enter the one-way valve along the upper channel and the lower channel respectively, then the sodium metaaluminate solution is converted into the transverse flow direction, and then a plurality of strands of transverse liquid flow directions are uniformly formed along the liquid inlet slit pipe of the gas-liquid mixed injector and are fully contacted with the high-temperature carbon dioxide gas from the upper part, and the reaction is accelerated.
6. In order to enable the scheme to be implemented smoothly, the pump lower tail pipe 4 is designed, and a special structure is designed, so that the high-temperature packer 3 is set; on the other hand, in the injection, the homogenization is performed; finally, the system can also be a channel for oil production in production.
7. The high-temperature packer 3 improves the double injection efficiency and is more convenient for oil reservoir absorption and utilization.
8. The oil well pump is an oil extraction tool.
9. The oil pipe plays a connecting role.
In addition, the gas-liquid mixing injector has the following functions: making gas CO2With liquid NaAlO2The solution is mixed evenly, so that more Al can be generated2O3And the reaction in the oil reservoir is carried out more smoothly.
In addition, in order to facilitate field construction, a sodium metaaluminate solution configurator is designed on a ground well site, so that the sodium metaaluminate solution can be configured at the well site and injected into the underground well, the high-efficiency utilization is realized, and the following steps are required: due to 2NaOH + Al2O3=2NaAlO2+H2O is an exothermic reaction, and therefore, in order to prevent the liquid from being excessively high in temperature, cooling is necessary, and therefore, a condensation vessel is designed.
The double-head liquid injector has the following functions: 1. NaAlO is added2The solution is injected into the gas-liquid mixing injector 5, which is required to be mixed with CO2Sufficient gas contact for Al2O3Thus requiring: 1 multi-hole, i.e. multi-strand injection; 2 the flow direction is parallel to the axial section, so double head injection is used. 2. When oil is produced, the liquid must not overflow, so that it adopts the form of check valve. 3. Because the steel ball can form the vortex effect, be favorable to gas-liquid mixture, consequently, adopt the steel ball form.
It should also be noted that: NaAlO2Is an aqueous solution, soluble in water; injected CO2The temperature was 380 ℃.
After the thick oil block experiment, for example, buckling 38-17#, buckling 39-15#, room 29-17# and hole 1032-4# in big harbor all obtain better effect.
In the embodiment 2, the other thickened oil double-injection thin oil adopts a gas-liquid mixed injection device, and the technical scheme is as follows: comprises a double-end injector (6) and a gas-liquid mixed injector (5), wherein the double-end injector (6) comprises an injector body (6.1), an injector injection port (6.2), a supporting spring (6.3), a sealing steel ball (6.4) and a sealing rubber ring (6.5), the injector body (6.1) is of an annular sleeve structure, a plurality of upper injector injection channels (6.6) are arranged on the upper surface of the injector body (6.1), a plurality of lower injector injection channels (6.2) are arranged on the lower surface of the injector body (6.1), an upper sealing steel ball (6.4) and an upper supporting spring (6.3) are arranged in an inner cavity of the upper injector injection channel (6.6), a lower sealing steel ball (6.7) and a lower supporting spring (6.8) are arranged in an inner cavity of the lower injector injection channel (6.2), and a liquid outlet channel (6.9) is arranged between the upper injector channel (6.6) and the lower injector channel (6.2), one end of the liquid outlet channel (6.9) is communicated with the liquid injection channel (6.6) of the upper liquid injector and the liquid injection channel (6.2) of the lower liquid injector, and the other end is communicated with the gas-liquid mixing injector (5);
referring to the attached figure 5, the gas-liquid mixing injector (5) comprises a liquid inlet slit pipe (5.1), a carrier (5.2), a gas-liquid homogenizing chamber (5.3), a gas guide plate (5.4), a gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6), a mixing injector lower cavity (5.7), a lower connector (5.8) and a mixing injector middle cavity (5.9), one end of the liquid inlet slit pipe (5.1) is connected to the bottom of the oil pump barrel (7), the side wall of the liquid inlet slit pipe (5.1) is communicated with a liquid outlet channel (6.9) of the double-head injector (6), a round gas guide plate (5.4) is arranged at the other end of the liquid inlet slit pipe (5.1), the gas guide plate (5.4) and the gas-liquid homogenizing plate (5.5) form the gas-liquid homogenizing chamber (5.3), the multi-stage capillary (5.6) is communicated with the mixing injector middle injection cavity (5.9) below the homogenizing plate (5.5), and the multi-stage capillary (5.6) is communicated with the mixing injector middle cavity (5.9), the bottom of the lower cavity (5.7) of the mixing injector is provided with a lower connector (5.8) for connecting a tail pipe (4) under the pump.
Of course, the diameter of the lower set of multi-stage capillaries is slightly larger than that of the first set of multi-stage capillaries.
In a word, the structure that this embodiment adopted can make sodium metaaluminate solution more abundant with the reaction of high temperature carbon dioxide gas, and the efficiency of the aluminium oxide that generates is higher to make the catalyst aluminium oxide that obtains more in the viscous crude oil reservoir.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (4)
1. The utility model provides a thick oil is two to be annotated thin adopts gas-liquid and thoughtlessly annotates device which characterized by: comprises a double-end injector (6) and a gas-liquid mixed injector (5), wherein the double-end injector (6) comprises an injector body (6.1), an injector injection port (6.2), a supporting spring (6.3), a sealing steel ball (6.4) and a sealing rubber ring (6.5), the injector body (6.1) is of an annular sleeve structure, a plurality of upper injector injection channels (6.6) are arranged on the upper surface of the injector body (6.1), a plurality of lower injector injection channels (6.2) are arranged on the lower surface of the injector body (6.1), an upper sealing steel ball (6.4) and an upper supporting spring (6.3) are arranged in an inner cavity of the upper injector injection channel (6.6), a lower sealing steel ball (6.7) and a lower supporting spring (6.8) are arranged in an inner cavity of the lower injector injection channel (6.2), and a liquid outlet channel (6.9) is arranged between the upper injector channel (6.6) and the lower injector channel (6.2), one end of the liquid outlet channel (6.9) is communicated with the liquid injection channel (6.6) of the upper liquid injector and the liquid injection channel (6.2) of the lower liquid injector, and the other end is communicated with the gas-liquid mixing injector (5);
the gas-liquid mixing injector (5) comprises a liquid inlet slotted pipe (5.1), a carrier (5.2), a gas-liquid homogenizing chamber (5.3), a gas guide plate (5.4), a gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6), a mixing injector lower cavity (5.7) and a lower connector (5.8), one end of the liquid inlet slotted pipe (5.1) is connected with the bottom of the oil pump barrel (7), and the side wall of the liquid inlet slotted pipe (5.1) is communicated with a liquid outlet channel (6.9) of the double-head liquid injector (6), the other end of the liquid inlet slotted pipe (5.1) is provided with a round gas guide plate (5.4), a gas-liquid homogenizing chamber (5.3) is formed between the gas guide plate (5.4) and the gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6) is arranged below the gas-liquid homogenizing plate (5.5) and is communicated with a lower cavity (5.7) of the mixing injector, the bottom of the lower cavity (5.7) of the mixing injector is provided with a lower connector (5.8) for connecting a tail pipe (4) under the pump.
2. The thickened oil double-injection thin-extraction device according to claim 1, which is characterized in that: the flow direction of the liquid outlet channel (6.9) is parallel to the axial section.
3. The thickened oil double-injection thin-extraction device according to claim 1, which is characterized in that: the length of the multistage capillary tube (5.6) accounts for at least one third of the length of the gas-liquid mixing injector (5), the upper end of the multistage capillary tube is communicated with the gas-liquid homogenizing chamber (5.3), and the lower end of the multistage capillary tube is communicated with the lower cavity (5.7) of the mixing injector.
4. The utility model provides a thick oil is two to be annotated thin adopts gas-liquid and thoughtlessly annotates device which characterized by: comprises a double-end injector (6) and a gas-liquid mixed injector (5), wherein the double-end injector (6) comprises an injector body (6.1), an injector injection port (6.2), a supporting spring (6.3), a sealing steel ball (6.4) and a sealing rubber ring (6.5), the injector body (6.1) is of an annular sleeve structure, a plurality of upper injector injection channels (6.6) are arranged on the upper surface of the injector body (6.1), a plurality of lower injector injection channels (6.2) are arranged on the lower surface of the injector body (6.1), an upper sealing steel ball (6.4) and an upper supporting spring (6.3) are arranged in an inner cavity of the upper injector injection channel (6.6), a lower sealing steel ball (6.7) and a lower supporting spring (6.8) are arranged in an inner cavity of the lower injector injection channel (6.2), and a liquid outlet channel (6.9) is arranged between the upper injector channel (6.6) and the lower injector channel (6.2), one end of the liquid outlet channel (6.9) is communicated with the liquid injection channel (6.6) of the upper liquid injector and the liquid injection channel (6.2) of the lower liquid injector, and the other end is communicated with the gas-liquid mixing injector (5);
the gas-liquid mixing injector (5) comprises a liquid inlet slit pipe (5.1), a carrier (5.2), a gas-liquid homogenizing chamber (5.3), a gas guide plate (5.4), a gas-liquid homogenizing plate (5.5), a multi-stage capillary (5.6), a mixing injector lower cavity (5.7), a lower connector (5.8) and a mixing injector middle cavity (5.9), wherein one end of the liquid inlet slit pipe (5.1) is connected to the bottom of the oil pumping cylinder (7), the side wall of the liquid inlet slit pipe (5.1) is communicated with a liquid outlet channel (6.9) of the double-head injector (6), a round gas guide plate (5.4) is arranged at the other end of the liquid inlet slit pipe (5.1), the gas-liquid homogenizing chamber (5.3) is formed between the gas guide plate (5.4) and the gas-liquid homogenizing plate (5.5), the multi-stage capillary (5.6) of the liquid inlet slit pipe (5.1) is communicated with the mixing injector middle cavity (5.9), and the mixing injector middle cavity (5.9) is communicated with the multi-stage capillary below the mixing injector lower cavity (5.9), the bottom of the lower cavity (5.7) of the mixing injector is provided with a lower connector (5.8) for connecting a tail pipe (4) under the pump.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309498A (en) * | 2021-07-28 | 2021-08-27 | 中国石油大学胜利学院 | Device and method for realizing cold production of thick oil by continuously injecting light oil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040071781A1 (en) * | 2002-10-11 | 2004-04-15 | Ferro Corporation | Composite particles and method for preparing |
| CN101684727A (en) * | 2008-09-28 | 2010-03-31 | 中国石油化工股份有限公司 | Optimization method for determining proportion of mixing light oil into heavy oil of ultra-deep well and light hydrocarbon mixer thereof |
| CN102942913A (en) * | 2012-11-22 | 2013-02-27 | 吉林冠通能源科技有限公司 | Hydrogenation heat gas chemical yield increasing solution component applied to shallow well |
| CN108425663A (en) * | 2018-04-04 | 2018-08-21 | 西南石油大学 | A kind of multi-functional carbon dioxide injection improves the anticorrosion structure and method of recovery ratio |
| CN209801874U (en) * | 2019-04-26 | 2019-12-17 | 合肥博均制冷配件有限公司 | Flow divider with changeable flow guiding direction |
-
2020
- 2020-05-25 CN CN202010446738.6A patent/CN111594110A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040071781A1 (en) * | 2002-10-11 | 2004-04-15 | Ferro Corporation | Composite particles and method for preparing |
| CN101684727A (en) * | 2008-09-28 | 2010-03-31 | 中国石油化工股份有限公司 | Optimization method for determining proportion of mixing light oil into heavy oil of ultra-deep well and light hydrocarbon mixer thereof |
| CN102942913A (en) * | 2012-11-22 | 2013-02-27 | 吉林冠通能源科技有限公司 | Hydrogenation heat gas chemical yield increasing solution component applied to shallow well |
| CN108425663A (en) * | 2018-04-04 | 2018-08-21 | 西南石油大学 | A kind of multi-functional carbon dioxide injection improves the anticorrosion structure and method of recovery ratio |
| CN209801874U (en) * | 2019-04-26 | 2019-12-17 | 合肥博均制冷配件有限公司 | Flow divider with changeable flow guiding direction |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309498A (en) * | 2021-07-28 | 2021-08-27 | 中国石油大学胜利学院 | Device and method for realizing cold production of thick oil by continuously injecting light oil |
| CN113309498B (en) * | 2021-07-28 | 2021-09-24 | 中国石油大学胜利学院 | Device and method for realizing cold production of thick oil by continuously injecting light oil |
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