CN112480903A - Acid liquor preparation process - Google Patents
Acid liquor preparation process Download PDFInfo
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- CN112480903A CN112480903A CN202011328513.7A CN202011328513A CN112480903A CN 112480903 A CN112480903 A CN 112480903A CN 202011328513 A CN202011328513 A CN 202011328513A CN 112480903 A CN112480903 A CN 112480903A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/725—Compositions containing polymers
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Abstract
The embodiment of the invention discloses an acid liquor preparation process, and relates to the technical field of reservoir acidification modification. The acid liquor preparation process comprises the following steps: providing a liquid preparation device, wherein the liquid preparation device comprises a mixing pry, a buffering pry and a controller, and the mixing pry and the buffering pry are connected with the controller; providing a formula of the acid liquid to be prepared; according to the formula of the acid liquor to be prepared, a controller is utilized to send operation instructions to each centrifugal pump, the conveyor, the high-energy mixer and the stirrer, so that hydrochloric acid, the corrosion inhibitor and the corrosion-retarding synergist, water, the mixture of the gelling agent and the water and other additives are mixed in a buffer tank, and the acid liquor is prepared. According to the acid liquor preparation process provided by the embodiment of the invention, the controller is adopted to simultaneously add the water, the hydrochloric acid and the additive into the buffer tank to prepare the acid liquor by mixing, so that the dissolving difficulty in the acid liquor preparation process is reduced, the high-viscosity acid liquor can be prepared, the preparation speed is increased, and the safety is good.
Description
Technical Field
The embodiment of the application relates to the technical field of reservoir acidification reconstruction, in particular to an acid liquor preparation process.
Background
With the development of deep well ultra-deep well acidizing technology, acid liquor for fracture acidizing construction is continuously changed and innovated, construction scale is gradually increased, safety and environmental protection requirements are more and more strict, and the acid liquor for acidizing construction is mainly prepared from acid, water and additives.
In the related technology, a liquid supply vehicle or a 700-type single-time acid, water and additive liquid suction method is adopted to prepare the acid liquid, in the preparation process, the swelling time of the additive is long, the acid preparation efficiency is low, the high-viscosity and high-performance acid liquid cannot be obtained, and the method is not suitable for large-scale acidification construction processes.
Disclosure of Invention
The embodiment of the invention provides an acid liquor preparation process, which aims to solve the problems of low acid liquor preparation efficiency, high additive dissolution difficulty, low safety in a preparation process and the like in the related technology.
The technical scheme is as follows:
the embodiment of the invention provides an acid liquor preparation process, which comprises the following steps:
the acid liquor preparation device comprises a mixed pry, a buffer pry and a controller, wherein the mixed pry and the buffer pry are connected with the controller, the mixed pry comprises a first centrifugal pump, a second centrifugal pump, a third centrifugal pump, a fourth centrifugal pump, a fifth centrifugal pump, a sixth centrifugal pump, a seventh centrifugal pump, a conveyor and a high-energy mixer, the buffer pry comprises a buffer tank with a stirrer, the high-energy mixer comprises a first inlet and a second inlet, the conveyor is connected with the first inlet, an outlet of the first centrifugal pump is divided into two branches, one branch is connected with the second inlet, the other branch is connected with an inlet of the buffer tank, an outlet of the high-energy mixer is connected with an inlet of the buffer tank, an outlet of the second centrifugal pump is connected with an inlet of the buffer tank, and the third centrifugal pump is connected with an inlet of the buffer tank, Outlets of the fourth centrifugal pump, the fifth centrifugal pump, the sixth centrifugal pump and the seventh centrifugal pump are respectively connected with an inlet of the buffer tank;
providing a formula of an acid solution to be prepared, wherein the acid solution to be prepared comprises the following components in percentage by mass: 40-60% of hydrochloric acid, 0.2-0.8% of gelling agent, 0.5-2.5% of iron ion stabilizer, 1.0-3.5% of corrosion inhibitor, 0.5-1.5% of corrosion inhibition synergist, 0.1-1.0% of cleanup additive, 0.1-1.0% of clay stabilizer and the balance of water;
sending an operation instruction to each centrifugal pump, the conveyor, the high-energy mixer and the stirrer by using the controller according to the formula of the acid liquid to be prepared, under the control of the controller, pumping water into the buffer tank and the high-energy mixer by using the first centrifugal pump, delivering the gelling agent into the high-energy mixer by using the conveyor to be mixed with the water to obtain a mixture, delivering the mixture into the buffer tank by using the high-energy mixer, respectively pumping the corrosion inhibitor and the corrosion inhibition synergist to be mixed with the hydrochloric acid by using the third centrifugal pump and the fourth centrifugal pump, pumping the mixture of the hydrochloric acid, the corrosion inhibitor and the corrosion inhibition synergist to the buffer tank by using the second centrifugal pump, and respectively pumping the iron ion stabilizer, the iron ion stabilizer and the iron ion synergist, And the cleanup additive and the clay stabilizer are added to the buffer tank, stirred and mixed by the stirrer, and acid liquor is prepared.
Optionally, the mixing pry further comprises a discharge pump and an acid storage tank, the discharge pump is connected with the controller, an inlet of the discharge pump is connected with an outlet of the buffer tank, an outlet of the discharge pump is connected with an inlet of the acid storage tank, and the discharge pump is used for pumping the acid solution in the buffer tank into the acid storage tank.
Optionally, a liquid level meter is arranged in the buffer tank, the liquid level meter is connected with the controller, and the liquid level meter is used for sending a detected liquid level signal in the buffer tank to the controller.
Optionally, the acid solution preparation process further includes: the controller is used for acquiring a liquid level signal detected by the liquid level meter in real time and judging whether the acid liquid in the buffer tank reaches a preset liquid level or not, when the acid liquid in the buffer tank reaches the preset liquid level, the controller sends an operation instruction to the discharge pump, and the discharge pump is used for pumping and discharging the acid liquid in the buffer tank.
Optionally, the second centrifugal pump has a flow rate of 0.6m3/min-2m3/min。
Optionally, a second flow meter is arranged between the second centrifugal pump and the buffer tank, and the second flow meter is connected with the controller.
Optionally, a first flowmeter is arranged between the first centrifugal pump and the buffer tank, the first flowmeter is connected with the controller, and an outlet of the first centrifugal pump is divided into two branches after passing through the first flowmeter.
Optionally, the acid solution to be prepared comprises the following components in percentage by mass: 45-60% of hydrochloric acid, 0.3-0.6% of gelling agent, 1.0-2.5% of iron ion stabilizer, 1.5-3.5% of corrosion inhibitor, 1.0-1.5% of corrosion inhibition synergist, 0.5-1.0% of cleanup additive, 0.5-1.0% of clay stabilizer and the balance of water.
Optionally, the gelling agent is selected from cationic acrylamide-based polymers or polyvinylpyrrolidone.
Optionally, the iron ion stabilizer is at least one selected from citric acid, iron ion stabilizer for WC-1 acidification, iron ion stabilizer for PY-33 acidification, sodium nitrilotriacetate, sodium erythorbate, tetrasodium hexanediaminedisulfonic acid and sodium tetraacetate.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise: according to the acid liquor preparation process, the acid liquor preparation device is used for automatically mixing the hydrochloric acid, the water and the additive to prepare the acid liquor, and compared with a single-addition mode, the acid liquor preparation process is high in liquor preparation efficiency; the gelling agent is mixed with part of water and then mixed with acid and other additives, so that the swelling time of the gelling agent is reduced, the dissolving difficulty of the additives is reduced, the quality performance of the acid liquid is improved, and the liquid preparation speed is increased; the mode that the raw materials added has reduced the contact time of operating personnel with industrial chemicals, has ensured operating personnel's healthy and life safety, and the security is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of an acid solution preparation process according to an embodiment of the present invention.
The reference numerals denote:
1-a first centrifugal pump;
2-a second centrifugal pump;
3-a third centrifugal pump;
4-a fourth centrifugal pump;
5-a fifth centrifugal pump;
6-a sixth centrifugal pump;
7-a seventh centrifugal pump;
8-a conveyor;
9-high energy mixer;
10-a buffer tank;
11-a discharge pump;
12-an acid storage tank;
13-a first flow meter;
14 a second flow meter;
15-a first container;
16-a second container;
17-a dry powder tank;
18-a third container;
19-a fourth container;
20-a fifth container;
21-a sixth container;
22-seventh container.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below.
The related technology discloses an acid liquor preparation device, which comprises a box body, an electric cabinet, a rotating motor, a control panel, a cooling mechanism, an acid liquor feeding pipe, a first electromagnetic valve, a second electromagnetic valve, a water inlet pipe, a rotating shaft, a glass stirring rod, a pH value testing mechanism, a mixed liquid box body, a storage battery and a PLC (programmable logic controller), wherein the electric cabinet is arranged on one side of the box body, the control panel is arranged on one side of the electric cabinet, the storage battery and the PLC are arranged inside the electric cabinet, the mixed liquid box body is arranged on the inner wall of the top of the box body, the rotating motor is arranged at the center of the top of the box body, the rotating shaft is arranged at the bottom of the rotating motor, penetrates through the inner wall of the top of the box body to be in contact with the air inside of the mixed liquid box body, the acid liquor, and also has a cooling function. However, the device can only simply prepare dilute acid from concentrated acid and water, and acid liquor used for acidification construction needs to be added with various additives besides acid and water, so that the device cannot be used for on-site acidification construction.
The related technology discloses an acid liquor preparation device for production and processing of storage batteries, which comprises a concentrated sulfuric acid tank, a water storage tank, a reaction tank, a collection tank, a first acid storage tank, a cooling water tank, a circulating pump and a control cabinet, wherein a plurality of mixing pipes are arranged in the reaction tank, concentrated sulfuric acid spray headers and water spray headers are arranged at the top ends in the mixing pipes, a dilute sulfuric acid confluence disc is arranged at the bottom in the reaction tank, and a concentrated sulfuric acid confluence disc and a water confluence disc are arranged at the top; a liquid outlet of the concentrated sulfuric acid tank is sequentially connected with a concentrated sulfuric acid metering pump and a concentrated sulfuric acid confluence disc, a liquid outlet of the water storage tank is sequentially connected with a water metering pump and a water confluence disc, the dilute sulfuric acid confluence disc is connected with a liquid inlet of a collection tank, a liquid outlet of the collection tank is connected with a first acid storage tank, a water inlet of a cooling water tank is connected with the bottom end of the reaction tank, and a liquid outlet of the cooling water tank is sequentially connected with a circulating pump and the upper end; the concentrated sulfuric acid metering pump and the water metering pump are connected with the control cabinet. The production efficiency is improved, and the consistency of the concentration of the dilute sulfuric acid is good and the accuracy is high. However, the device can only simply prepare dilute acid from concentrated acid and water, and acid liquor used for acidification construction needs to be added with various additives besides acid and water; in addition, the acid solution used in the acidification construction is hydrochloric acid, and the device mainly aims at sulfuric acid, so the device cannot be used for the acidification construction.
The embodiment of the invention aims at an acid liquid preparation process for high-temperature and high-pressure sulfur-containing gas reservoir energy storage transformation, and is suitable for large-scale on-site acidification construction of a seismic denier system in a high-wear area, a Longwang temple, a Sichuan substandard system and a Chuantong ancient-seismic denier system in a Chuantong area, which have the characteristics of high-temperature and high-pressure sulfur-containing gas reservoirs.
Acid liquor is required to be prepared for fracturing and acidizing construction before large-scale acidizing construction, and in the process of large-scale acidizing construction (such as construction scale more than 200), acid liquor with high viscosity and high performance is required to be prepared, and the preparation amount can meet the requirements of site construction. The acid liquor provided by the embodiment of the invention is mainly used for acidifying and reforming a carbonate reservoir.
The embodiment of the invention provides an acid liquor preparation process, which comprises the following steps:
step 1, providing an acid liquor preparation device, which comprises a mixing pry, a buffer pry and a controller, wherein the mixing pry and the buffer pry are connected with the controller, as shown in fig. 1, the mixing pry comprises a first centrifugal pump 1, a second centrifugal pump 2, a third centrifugal pump 3, a fourth centrifugal pump 4, a fifth centrifugal pump 5, a sixth centrifugal pump 6, a seventh centrifugal pump 7, a conveyor 8 and a high-energy mixer 9, the buffer pry comprises a buffer tank 10 with a stirrer, the high-energy mixer 9 comprises a first inlet and a second inlet, the conveyor 8 is connected with the first inlet, an outlet of the first centrifugal pump 1 is divided into two branches, one branch is connected with the second inlet, the other branch is connected with an inlet of the buffer tank 10, an outlet of the high-energy mixer 9 is connected with an inlet of the buffer tank 10, an outlet of the second centrifugal pump 2 is connected with an inlet of the buffer tank 10, and the third centrifugal pump 3, the fourth centrifugal pump 4, the, Outlets of the fifth centrifugal pump 5, the sixth centrifugal pump 6 and the seventh centrifugal pump 7 are respectively connected with an inlet of a buffer tank 10.
And 3, sending an operation instruction to each centrifugal pump, a conveyor 8, a high-energy mixer 9 and a stirrer by using a controller according to a formula of the acid liquor to be prepared, under the control of the controller, pumping water into a buffer tank 10 and the high-energy mixer 9 by using a first centrifugal pump 1, conveying a gelling agent into the high-energy mixer 9 by using the conveyor 8 to be mixed with the water to obtain a mixture, conveying the mixture into the buffer tank 10 by using the high-energy mixer 9, pumping a corrosion inhibitor and a corrosion inhibition synergist to be mixed with hydrochloric acid by using a third centrifugal pump 3 and a fourth centrifugal pump 4 respectively, pumping a mixture of the hydrochloric acid, the corrosion inhibitor and the corrosion inhibition synergist to the buffer tank 10 by using a second centrifugal pump 2, pumping an iron ion stabilizer, a cleanup additive and a clay stabilizer to the buffer tank by using a fifth centrifugal pump 5, a sixth centrifugal pump 6 and a seventh centrifugal pump 7 respectively, and stirring and mixing the mixture by using the.
In the embodiment of the invention, by arranging the acid liquor preparation device, under the control of the controller, water, a mixture of hydrochloric acid, a corrosion inhibitor and a corrosion synergist, a mixture of a gelling agent and water and other liquid additives (an iron ion stabilizer, a cleanup additive and a clay stabilizer) are simultaneously and continuously added into the buffer tank 10, the acid liquor is prepared by stirring and mixing through the stirrer, and the controller is adopted to control the blending pry and the buffer pry, so that the simultaneous addition of all components is realized.
Step 1, providing an acid liquor preparation device, as shown in fig. 1, wherein the device comprises a mixing pry, a buffer tank pry and a controller (not shown in fig. 1). The blending pry and the buffer tank pry are both connected with the controller.
Optionally, the controller is a computer-controlled display system (or an intelligent control system), and the controller is a PLC controller, for example.
The mixing and prying machine comprises a first centrifugal pump 1, a second centrifugal pump 2, a third centrifugal pump 3, a fourth centrifugal pump 4, a fifth centrifugal pump 5, a sixth centrifugal pump 6, a seventh centrifugal pump 7, a conveyor 8 and a high-energy mixer 9.
The buffer tank pry comprises a buffer tank 10 with a stirrer, and a liquid level meter for detecting the liquid level of acid liquid in the buffer tank is further arranged in the buffer tank 10.
In the embodiment of the invention, the mixing pry further comprises a dry powder tank 17, wherein the dry powder tank 17 is used for containing a dry powder-shaped gelling agent, the conveyor 8 is used for conveying the gelling agent, and the high-energy mixer 9 is used for mixing the gelling agent with water.
The high energy mixer 9 comprises a first inlet and a second inlet. Both ends of the conveyor 8 are connected to an outlet of the dry powder tank 17 and a first inlet of the high-energy mixer 9, respectively, an outlet of the high-energy mixer 9 is connected to an inlet of the buffer tank 10, a second outlet of the high-energy mixer 9 includes a high-speed nozzle through which a mixture of water and the gelling agent is sprayed into the buffer tank 10.
Alternatively, the gelling agent enters the conveyor 8 from an outlet of the dry powder tank 17, and the conveyor 8 enters the high-energy mixer 9 from a first inlet.
The first centrifugal pump 1 is used to pump the water of the first container 15 containing water into the buffer tank 10 and the high-energy mixer 9.
The outlet of the first centrifugal pump 1 is divided into two branches, one branch is connected with the second inlet of the high-energy mixer 9, so that part of water is pumped into the high-energy mixer 9 to be mixed with the dry powder-shaped gelatinizing agent to form a liquid mixture, and compared with the direct mixing with other components, the dissolution is more sufficient, and the acid-blending speed is favorably improved; the second branch is connected to the inlet of the buffer tank 10.
The outlet of the second centrifugal pump 2 is connected to the inlet of the buffer tank 10, and the second centrifugal pump 2 is used for pumping hydrochloric acid, corrosion inhibitor and corrosion inhibitor synergist from a second container 16 filled with hydrochloric acid into the buffer tank 10.
The third centrifugal pump 3 is used for extracting corrosion inhibitor from a third container 18 filled with the corrosion inhibitor to be mixed with hydrochloric acid, and the fourth centrifugal pump 4 is used for extracting corrosion inhibition synergist from a fourth container 19 to be mixed with the hydrochloric acid.
Optionally, a first flow meter 13 is provided between the first centrifugal pump 1 and the surge tank 10 for monitoring the flow rate of water; a second flow meter 14 is provided between the second centrifugal pump 2 and the buffer tank 10 for monitoring the flow of hydrochloric acid.
The first flow meter 13 and the second flow meter 14 are both connected with the controller, the first flow meter 13 and the second flow meter 14 respectively send detected flow signals to the controller, and the controller monitors the flow signals in real time to guarantee accuracy of the distribution ratio of the preparation components and stability of operation of the preparation process.
Outlets of the fifth centrifugal pump 5, the sixth centrifugal pump 6 and the seventh centrifugal pump 7 are respectively connected with an inlet of the buffer tank 10, the fifth centrifugal pump 5 is used for pumping the iron ion stabilizer into the buffer tank 10 from a fifth container 20 filled with the iron ion stabilizer, the sixth centrifugal pump 6 is used for pumping the cleanup additive into the buffer tank 10 from a sixth container 21 filled with the cleanup additive, and the seventh centrifugal pump 7 is used for pumping the clay stabilizer into the buffer tank 10 from a seventh container 22 filled with the clay stabilizer.
According to the embodiment of the invention, the mixing pry further comprises an acid mist neutralizing tank, the acid mist neutralizing tank is connected with the buffer tank 10 in the acid mixing process, and the acid mist neutralizing tank is used for eliminating acid mist in the buffer tank 10.
The mixing pry further comprises a discharge pump 11 and an acid storage tank 12, wherein the discharge pump 11 is connected with a controller, and the controller can control the discharge flow of the discharge pump 11. An inlet of the discharge pump 11 is connected to an outlet of the buffer tank 10, and the discharge pump 11 is used for pumping the prepared acid solution in the buffer tank 10 to the acid storage tank 12 for storing the prepared acid solution.
And 2, providing a formula of the acid liquid to be prepared.
The acid liquid to be prepared comprises hydrochloric acid, water and additives, the additives comprise a gelling agent, a corrosion inhibitor, a corrosion inhibition synergist, an iron ion stabilizer, a cleanup additive and a clay stabilizer, the gelling agent in the additives is a solid dry powder additive, and the other additives are liquid additives.
The acid solution to be prepared comprises the following components in percentage by mass: 40-60% of hydrochloric acid, 0.2-0.8% of gelling agent, 0.5-2.5% of iron ion stabilizer, 1.0-3.5% of corrosion inhibitor, 0.5-1.5% of corrosion inhibition synergist, 0.1-1.0% of cleanup additive, 0.1-1.0% of clay stabilizer and the balance of water.
The first centrifugal pump 1, the second centrifugal pump 2, the third centrifugal pump 3, the fourth centrifugal pump 4, the fifth centrifugal pump 5, the sixth centrifugal pump 6, the seventh centrifugal pump 7, the conveyor 8, the high-energy mixer 9, the stirrer and the liquid level meter are respectively connected with the controller, and the controller calculates flow parameters of all components according to a provided formula of the acid solution to be prepared and set flow parameters of hydrochloric acid, so that the setting of parameters of all equipment is realized, for example, the flow of each centrifugal pump and the rotating speed parameter of the conveyor 8 are set, and the addition amount of each component is matched with the set mass percentage.
In the embodiment of the invention, the gelatinizing agent enters the conveyor 8 from the dry powder tank 17, the conveyor 8 conveys the gelatinizing agent to the high-energy mixer 9 to be mixed with water, the controller of the controller is connected with the conveyor 8, the controller sends an operation instruction to the conveyor 8, and the conveyor 8 controls the adding amount of the gelatinizing agent according to the rotating speed set by the controller.
Optionally, the conveyor 8 is further connected to an electronic scale, the electronic scale is connected to the controller, the amount of the gelling agent conveyed by the conveyor 8 is weighed by the electronic scale, the electronic scale sends the measurement result to the controller, and the controller monitors whether the gelling agent is added according to the set mass ratio.
Optionally, the acid solution to be treated comprises the following components in percentage by mass: 45-60% of hydrochloric acid, 0.3-0.6% of gelling agent, 1.0-2.5% of iron ion stabilizer, 1.5-3.5% of corrosion inhibitor, 1.0-1.5% of corrosion inhibition synergist, 0.5-1.0% of cleanup additive, 0.5-1.0% of clay stabilizer and the balance of water.
In the embodiment of the invention, the hydrochloric acid is industrial hydrochloric acid with the mass fraction of 31%.
The gelling agent is an additive capable of making the acid liquid sticky, the gelling agent is a cationic acrylamide polymer or polyvinylpyrrolidone, and optionally, the gelling agent is methylene acrylamide or polyvinylpyrrolidone.
Iron ions can be formed after the acid liquor contacts the construction pipe column, and the iron ion stabilizer can prevent the iron ions from entering the stratum, so that the damage to the stratum is reduced.
Optionally, the iron ion stabilizer is at least one selected from citric acid, iron ion stabilizer for WC-1 acidification, iron ion stabilizer for PY-33 acidification, sodium nitrilotriacetate, sodium erythorbate, tetrasodium hexanedienedisulfonate and sodium tetraacetate oxalate, and further, the iron ion stabilizer is citric acid, for example, citric acid solution with mass fraction of 40%.
The corrosion inhibitor is at least one selected from imidazoline corrosion inhibitors, quaternary ammonium salt corrosion inhibitors, organic phosphate corrosion inhibitors, thiourea corrosion inhibitors, alkynol corrosion inhibitors, Mannich base corrosion inhibitors and Schiff base corrosion inhibitors.
The corrosion inhibition synergist is at least one selected from cuprous chloride, potassium iodide, formamide, propiolic alcohol, potassium pyroantimonate and sodium pyroantimonate.
The cleanup additive is at least one selected from methanol, isopropanol, organosilicon, anionic fluorocarbon surfactant, nonionic fluorocarbon surfactant, cetyl trimethyl ammonium bromide, polyoxyethylene alkylphenol ether sulfate and polyoxyethylene alkylphenol ether phosphate.
The clay stabilizer is at least one selected from potassium chloride, cationic quaternary ammonium salt, NW-2 clay stabilizer, COP-1 clay stabilizer and WN-200 viscosity stabilizer.
During the fracturing and acidizing construction, the construction pipe column is made of steel, the construction pipe column is easy to become brittle after being corroded by high-concentration acid liquor, metal iron corroded by the acid liquor becomes ions, and the metal iron can cause damage to the stratum under certain conditions.
The drainage aid is added into the acid liquor, so that the later-stage flowback of the acid liquor is facilitated, and the clay stabilizer is added into the acid liquor, so that the expansion of the formation clay and the migration of clay particles can be inhibited.
The adding mode of the additive is determined according to the solid or liquid state of the additive.
Illustratively, the adhesive is a solid dry powder that is formed by first mixing a portion of the water with the gelling agent to form a liquid mixture, and then mixing the liquid mixture with hydrochloric acid and water to reduce the swelling time of the gelling agent.
In order to prevent the hydrochloric acid from corroding the second centrifugal pump 2, the corrosion inhibitor and the corrosion inhibition synergist are added into the hydrochloric acid through the third centrifugal pump 3 and the fourth centrifugal pump 4, so that the corrosion inhibitor, the corrosion inhibition synergist and the hydrochloric acid are mixed and then pumped into the buffer tank 10 through the second centrifugal pump 2, and the corrosion of the hydrochloric acid on the second centrifugal pump 2 can be prevented or reduced.
And 3, sending an operation instruction to each centrifugal pump, a conveyor 8, a high-energy mixer 9 and a stirrer by using a controller according to a formula of the acid liquor to be prepared, under the control of the controller, pumping water into a buffer tank 10 and the high-energy mixer 9 by using a first centrifugal pump 1, conveying a gelling agent into the high-energy mixer 9 by using the conveyor 8 to be mixed with the water to obtain a mixture, conveying the mixture into the buffer tank 10 by using the high-energy mixer 9, pumping a corrosion inhibitor and a corrosion inhibition synergist to be mixed with hydrochloric acid by using a third centrifugal pump 3 and a fourth centrifugal pump 4 respectively, pumping a mixture of the hydrochloric acid, the corrosion inhibitor and the corrosion inhibition synergist into the buffer tank 10 by using a second centrifugal pump 2, pumping an iron ion stabilizer, a cleanup additive and a clay stabilizer into the buffer tank 10 by using a fifth centrifugal pump 5, a sixth centrifugal pump 6 and a seventh centrifugal pump 7 respectively, and stirring and mixing by using the stirrer to.
According to the embodiment of the invention, acid liquor preparation parameters are input into a controller, and the controller of the controller simultaneously sends operation instructions to a first centrifugal pump 1, a second centrifugal pump 2, a third centrifugal pump 3, a fourth centrifugal pump 4, a fifth centrifugal pump 5, a sixth centrifugal pump 6, a seventh centrifugal pump 7, a conveyor 8, a high-energy mixer 9 and a stirrer according to preset parameters, so that a mixture of hydrochloric acid, water, a gelling agent and water and other additives enter a buffer tank 10 and are fully mixed under the stirring of the stirrer.
Optionally, the first water pump pumps water into the buffer tank 10 and the high-energy mixer 9, the gelling agent is conveyed into the high-energy mixer 9 by the conveyor 8, the gelling agent and the water are fully mixed in the high-energy mixer 9 to obtain a mixture, the mixture is sprayed into the buffer tank 10 from a high-speed nozzle of the high-energy mixer 9 and enters a mixing pipeline, the corrosion inhibitor and the corrosion inhibition synergist are respectively pumped into the acid liquor by the third centrifugal pump 3 and the fourth centrifugal pump 4, the corrosion inhibitor and the corrosion inhibition synergist are pumped into the buffer tank 10 by the second centrifugal pump 2, and the mixture is stirred and mixed in the buffer tank 10 by the stirrer, so that the acid liquor is quickly viscous to reach the expected viscosity.
The acid liquor preparation process also comprises the following steps: and 4, acquiring a liquid level signal detected by the liquid level meter in real time by using a controller of the controller, and judging whether the acid liquid in the buffer tank 10 reaches a set liquid level or not, when the acid liquid in the buffer tank 10 reaches the set liquid level, sending an operation instruction to the discharge pump 11 by using the controller, enabling the discharge pump 11 to work, discharging the acid liquid in the buffer tank 10 by using the discharge pump 11, extracting and discharging the acid liquid in the buffer tank 10 by using the discharge pump 11, namely extracting the acid liquid in the buffer tank 10 into the acid storage tank 12 for storage.
In step 4, the liquid level of the acid solution in the buffer tank 10 is set according to the size of the buffer tank 10, that is, the liquid level is set so as to discharge the acid solution in the buffer tank 10 in time and prevent the acid solution in the buffer tank 10 from being overfilled, and the set liquid level can be 18m filled in the buffer tank3-20m3Liquid level in acid liquor.
Optionally, a second liquid level meter is arranged in the acid storage tank 12, the second liquid level meter is connected with the controller, the controller reads a liquid level signal detected by the second liquid level meter in real time, whether the acid liquid in the acid storage tank 12 reaches a high liquid level is judged, when the acid liquid reaches the high liquid level, the acid storage tank 12 is replaced, and the process is repeated.
Optionally, in the acid liquid preparation process, the controller monitors the preparation process in real time, if a problem occurs, the controller automatically judges, sends an alarm signal or stops the machine, and the fault position and the attribute are displayed on a computer display screen of the controller.
The second centrifugal pump 2 has, for example, a flow rate of 0.6m3/min-2m3And/min, setting the mass percentage of each component and the flow rate of the second centrifugal pump 2 so as to obtain the flow rate of other components, inputting the flow rate parameters of each component into a controller, and sending an operation instruction to each device by the controller according to the parameters.
According to the acid liquor preparation process, the acid liquor preparation device is adopted to automatically mix the hydrochloric acid, the water and the additive to prepare the acid liquor, and compared with a single-addition mode, the acid liquor preparation process is high in liquor preparation efficiency; the gelling agent is mixed with part of water firstly, and then is mixed with acid and other additives, so that the swelling time of the gelling agent is reduced (the swelling time of the conventional gelling agent is 30-60min, and the swelling time of the acid liquid preparation device is 5-10min), the dissolving difficulty of the additives is reduced, the quality performance of the acid liquid is improved, and the liquid preparation speed is increased; the mode that the raw materials added automatically (hydrochloric acid and additive all adopt automatic suction, and buffer tank 10 is totally enclosed, has completely cut off operating personnel and various industrial chemicals's contact time) has reduced operating personnel and industrial chemicals's contact time, has ensured operating personnel's healthy and life safety, and the security is high.
The acid solution preparation process provided by the embodiment of the invention can be used for efficiently preparing high-viscosity and high-performance acid solution, for example, the viscosity of the prepared acid solution is 30-40mPa & s, the resistance reduction performance is 40-50% of the friction resistance of a clean water pipeline, the preparation amount of the acid solution preparation process in 8 hours reaches more than 300, the on-site acidification construction requirement is met, and the acid solution preparation process is suitable for acidification reservoir construction of high-temperature and high-pressure sulfur-containing gas reservoirs.
The following is illustrated in detail by specific examples:
example 1
Providing an acid liquor preparation device, wherein the device comprises a mixing pry, a buffering pry and a controller, the mixing pry and the buffering pry are both connected with the controller, the mixing pry comprises a first centrifugal pump, a second centrifugal pump, a third centrifugal pump, a fourth centrifugal pump and a fifth centrifugal pump, the sixth centrifugal pump, the seventh centrifugal pump, conveyer and high-energy mixer, the buffering sled is including the buffer tank that has the agitator, high-energy mixer includes first entry and second entry, the conveyer is connected with first entry, the export of first centrifugal pump divide into two branches, a branch road is connected with the second entry, another branch road is connected with the entry of buffer tank, the export of high-energy mixer is connected with the entry of buffer tank, the export of second centrifugal pump is connected with the entry of buffer tank, the third centrifugal pump, the fourth centrifugal pump, the fifth centrifugal pump, the export of sixth centrifugal pump and seventh centrifugal pump is connected with the entry of buffer tank respectively.
Providing a formula of the acid solution to be prepared, wherein the mass percent of each component of the acid solution to be prepared is as follows: 45% of hydrochloric acid, 0.6% of gelling agent, 2.5% of iron ion stabilizer, 3.5% of corrosion inhibitor, 1.5% of corrosion inhibition synergist, 1% of cleanup additive, 1.0% of clay stabilizer and the balance of water.
According to the formula of the acid solution to be prepared, the flow of the input hydrochloric acid in the controller is 0.8m3The controller obtains flow parameters of each component according to the flow of the hydrochloric acid, the controller is utilized to send operation instructions to the conveyor, each centrifugal pump and the stirrer at the same time, under the control of the controller, the first centrifugal pump pumps water into the high-energy mixer and the buffer tank, the gelling agent enters the high-energy mixer through the conveyor, the gelling agent and the water are mixed in the high-energy mixer, the third centrifugal pump and the fourth centrifugal pump respectively pump the corrosion inhibitor and the corrosion synergist into the mixing pipeline, the second centrifugal pump pumps the hydrochloric acid, the corrosion inhibitor and the corrosion inhibitor synergist into the buffer tank, the stirrer stirs, the controller of the controller judges whether the acid liquid in the buffer tank reaches a set liquid level according to a detection signal of a liquid level meter in the buffer tank read in real time, and when the acid liquid in the buffer tank reaches the set liquid level, the controller sends the operation instructions to the discharge pump to discharge the pump to work, and pumping the acid liquor in the buffer tank into an acid storage tank for storage.
Prepared for 8 hours to obtain 330m3And (3) an acid solution having a viscosity of 34 mPas.
Example 2
Providing an acid liquor preparation device, wherein the device comprises a mixing pry, a buffering pry and a controller, the mixing pry and the buffering pry are both connected with the controller, the mixing pry comprises a first centrifugal pump, a second centrifugal pump, a third centrifugal pump, a fourth centrifugal pump and a fifth centrifugal pump, the sixth centrifugal pump, the seventh centrifugal pump, conveyer and high-energy mixer, the buffering sled is including the buffer tank that has the agitator, high-energy mixer includes first entry and second entry, the conveyer is connected with first entry, the export of first centrifugal pump divide into two branches, a branch road is connected with the second entry, another branch road is connected with the entry of buffer tank, the export of high-energy mixer is connected with the entry of buffer tank, the export of second centrifugal pump is connected with the entry of buffer tank, the third centrifugal pump, the fourth centrifugal pump, the fifth centrifugal pump, the export of sixth centrifugal pump and seventh centrifugal pump is connected with the entry of buffer tank respectively.
Providing a formula of the acid solution to be prepared, wherein the mass percent of each component of the acid solution to be prepared is as follows: 50% of hydrochloric acid, 0.4% of gelling agent, 2.0% of iron ion stabilizer, 3.0% of corrosion inhibitor, 1.2% of corrosion inhibition synergist, 0.8% of cleanup additive, 0.8% of clay stabilizer and the balance of water.
According to the formula of the acid solution to be prepared, the flow of the input hydrochloric acid in the controller is 1.0m3The controller obtains flow parameters of the components according to the flow of the hydrochloric acid and the mass percentage of the components, the controller is used for sending operation instructions to the conveyor, the centrifugal pumps and the stirrer, under the control of the controller, the first centrifugal pump pumps water into the high-energy mixer and the buffer tank, the gelatinizing agent enters the high-energy mixer through the conveyor, the gelatinizing agent and the water are mixed in the high-energy mixer, the third centrifugal pump and the fourth centrifugal pump respectively pump the corrosion inhibitor and the corrosion synergist into the mixing pipeline, the second centrifugal pump pumps the hydrochloric acid, the corrosion inhibitor and the corrosion synergist into the buffer tank, the stirrer stirs, the controller of the controller judges whether the acid liquid in the buffer tank reaches a high liquid level according to a detection signal of a liquid level meter in the buffer tank read in real time, and after the acid liquid in the buffer tank reaches the high liquid level, the controller sends the operation instructions to the discharge pump, and the discharge pump works to pump the acid liquor in the buffer tank into the acid storage tank for storage.
Prepared for 8 hours to obtain 350m3And (3) an acid solution having a viscosity of 35 mPas.
Example 3
Providing an acid liquor preparation device, wherein the device comprises a mixing pry, a buffering pry and a controller, the mixing pry and the buffering pry are both connected with the controller, the mixing pry comprises a first centrifugal pump, a second centrifugal pump, a third centrifugal pump, a fourth centrifugal pump and a fifth centrifugal pump, the sixth centrifugal pump, the seventh centrifugal pump, conveyer and high-energy mixer, the buffering sled is including the buffer tank that has the agitator, high-energy mixer includes first entry and second entry, the conveyer is connected with first entry, the export of first centrifugal pump divide into two branches, a branch road is connected with the second entry, another branch road is connected with the entry of buffer tank, the export of high-energy mixer is connected with the entry of buffer tank, the export of second centrifugal pump is connected with the entry of buffer tank, the third centrifugal pump, the fourth centrifugal pump, the fifth centrifugal pump, the export of sixth centrifugal pump and seventh centrifugal pump is connected with the entry of buffer tank respectively.
Providing a formula of the acid solution to be prepared, wherein the mass percent of each component of the acid solution to be prepared is as follows: 55% of hydrochloric acid, 0.5% of gelling agent, 2.5% of iron ion stabilizer, 3.0% of corrosion inhibitor, 1.3% of corrosion inhibition synergist, 0.9% of cleanup additive, 1.0% of clay stabilizer and the balance of water.
According to the formula of the acid solution to be prepared, the flow of the input hydrochloric acid in the controller is 1.8m3The controller obtains flow parameters of the components according to the flow of the hydrochloric acid and the mass percentage of the components, the controller is utilized to send operation instructions to the conveyor, the centrifugal pumps and the stirrer at the same time, under the control of the controller, the first centrifugal pump pumps water into the high-energy mixer and the buffer tank, the gelling agent enters the high-energy mixer through the conveyor, the gelling agent and the water are mixed in the high-energy mixer, the third centrifugal pump and the fourth centrifugal pump respectively pump the corrosion inhibitor and the corrosion synergist into the mixing pipeline, the second centrifugal pump pumps the hydrochloric acid, the corrosion inhibitor and the corrosion synergist into the buffer tank, the stirrer stirs, and the controller of the controller judges whether the acid liquid in the buffer tank reaches the high-liquid level according to the detection signal of the liquid level meter in the buffer tank read in real timeAnd when the acid liquid in the buffer tank reaches a high liquid level, the controller sends an operation instruction to the discharge pump, and the discharge pump works to pump the acid liquid in the buffer tank into the acid storage tank for storage.
Prepared for 8 hours to obtain 350m3And (3) an acid solution having a viscosity of 35 mPas.
Example 4
Providing an acid liquor preparation device, wherein the device comprises a mixing pry, a buffering pry and a controller, the mixing pry and the buffering pry are both connected with the controller, the mixing pry comprises a first centrifugal pump, a second centrifugal pump, a third centrifugal pump, a fourth centrifugal pump and a fifth centrifugal pump, the sixth centrifugal pump, the seventh centrifugal pump, conveyer and high-energy mixer, the buffering sled is including the buffer tank that has the agitator, high-energy mixer includes first entry and second entry, the conveyer is connected with first entry, the export of first centrifugal pump divide into two branches, a branch road is connected with the second entry, another branch road is connected with the entry of buffer tank, the export of high-energy mixer is connected with the entry of buffer tank, the export of second centrifugal pump is connected with the entry of buffer tank, the third centrifugal pump, the fourth centrifugal pump, the fifth centrifugal pump, the export of sixth centrifugal pump and seventh centrifugal pump is connected with the entry of buffer tank respectively.
Providing a formula of the acid solution to be prepared, wherein the mass ratio of each component of the acid solution to be prepared is as follows: 60% of hydrochloric acid, 0.6% of gelling agent, 2.5% of iron ion stabilizer, 1.5% of corrosion inhibitor, 1.0% of corrosion inhibition synergist, 1.0% of cleanup additive, 1.0% of clay stabilizer and the balance of water.
The flow rate of the input acid liquid in the controller is 2.0m according to the formula of the acid liquid to be prepared3The controller obtains flow parameters of the components according to the flow of the acid liquor and the mass percentage of the components, the controller is utilized to send operation instructions to the conveyor, the centrifugal pumps and the stirrer at the same time, the first centrifugal pump pumps water to the high-energy mixer and the buffer tank under the control of the controller, the gelatinizing agent enters the high-energy mixer through the conveyor, the gelatinizing agent and the water are mixed in the high-energy mixer, the third centrifugal pump and the fourth centrifugal pump respectively pump the corrosion inhibitor and the corrosion synergist to the mixing pipeline, and the second centrifugal pump pumps the gelling agentThe acid liquor, the corrosion inhibitor and the corrosion inhibition synergist are taken and filled into a buffer tank, a stirrer is used for stirring, a controller of the controller judges whether the acid liquor in the buffer tank reaches a high liquid level or not according to a detection signal read in real time from a liquid level meter in the buffer tank, when the acid liquor in the buffer tank reaches the high liquid level, the controller sends an operation instruction to a discharge pump, the discharge pump works, and the acid liquor in the buffer tank is pumped into an acid storage tank for storage.
Prepared for 8 hours to obtain 480m3And (3) acid liquor, wherein the viscosity of the acid liquor is 38 mPas.
The above description is only exemplary of the present application and should not be taken as limiting the scope of the present application, as any modifications, equivalents, improvements and the like that are within the spirit and principle of the present application should be included in the present application.
Claims (10)
1. The acid liquor preparation process is characterized by comprising the following steps:
the acid liquor preparation device comprises a mixed pry, a buffer pry and a controller, wherein the mixed pry and the buffer pry are connected with the controller, the mixed pry comprises a first centrifugal pump, a second centrifugal pump, a third centrifugal pump, a fourth centrifugal pump, a fifth centrifugal pump, a sixth centrifugal pump, a seventh centrifugal pump, a conveyor and a high-energy mixer, the buffer pry comprises a buffer tank with a stirrer, the high-energy mixer comprises a first inlet and a second inlet, the conveyor is connected with the first inlet, an outlet of the first centrifugal pump is divided into two branches, one branch is connected with the second inlet, the other branch is connected with an inlet of the buffer tank, an outlet of the high-energy mixer is connected with an inlet of the buffer tank, an outlet of the second centrifugal pump is connected with an inlet of the buffer tank, and the third centrifugal pump is connected with an inlet of the buffer tank, Outlets of the fourth centrifugal pump, the fifth centrifugal pump, the sixth centrifugal pump and the seventh centrifugal pump are respectively connected with an inlet of the buffer tank;
providing a formula of an acid solution to be prepared, wherein the acid solution to be prepared comprises the following components in percentage by mass: 40-60% of hydrochloric acid, 0.2-0.8% of gelling agent, 0.5-2.5% of iron ion stabilizer, 1.0-3.5% of corrosion inhibitor, 0.5-1.5% of corrosion inhibition synergist, 0.1-1.0% of cleanup additive, 0.1-1.0% of clay stabilizer and the balance of water;
sending an operation instruction to each centrifugal pump, the conveyor, the high-energy mixer and the stirrer by using the controller according to the formula of the acid liquid to be prepared, under the control of the controller, pumping water into the buffer tank and the high-energy mixer by using the first centrifugal pump, delivering the gelling agent into the high-energy mixer by using the conveyor to be mixed with the water to obtain a mixture, delivering the mixture into the buffer tank by using the high-energy mixer, respectively pumping the corrosion inhibitor and the corrosion inhibition synergist to be mixed with the hydrochloric acid by using the third centrifugal pump and the fourth centrifugal pump, pumping the mixture of the hydrochloric acid, the corrosion inhibitor and the corrosion inhibition synergist to the buffer tank by using the second centrifugal pump, and respectively pumping the iron ion stabilizer, the iron ion stabilizer and the iron ion synergist, And the cleanup additive and the clay stabilizer are added to the buffer tank, stirred and mixed by the stirrer, and acid liquor is prepared.
2. The acid fluid preparation process according to claim 1, wherein the mixing and prying machine further comprises a discharge pump and an acid storage tank, the discharge pump is connected to the controller, an inlet of the discharge pump is connected to an outlet of the buffer tank, an outlet of the discharge pump is connected to an inlet of the acid storage tank, and the discharge pump is used for pumping the acid fluid in the buffer tank into the acid storage tank.
3. The acid liquor preparation process according to claim 2, wherein a liquid level meter is arranged in the buffer tank, the liquid level meter is connected with the controller, and the liquid level meter is used for sending a detected liquid level signal in the buffer tank to the controller.
4. The acid liquor preparation process of claim 3, further comprising: the controller is used for acquiring a liquid level signal detected by the liquid level meter in real time and judging whether the acid liquid in the buffer tank reaches a set liquid level, when the acid liquid in the buffer tank reaches the set liquid level, the controller sends an operation instruction to the discharge pump, and the acid liquid in the buffer tank is discharged by the discharge pump.
5. Acid liquor preparation process according to claim 1, characterised in that the second centrifugal pump has a flow rate of 0.6m3/min-2m3/min。
6. The acid liquor preparation process according to any one of claims 1 to 5, wherein a second flow meter is arranged between the second centrifugal pump and the buffer tank, and the second flow meter is connected with the controller.
7. The acid liquor preparation process according to any one of claims 1 to 5, wherein a first flow meter is arranged between the first centrifugal pump and the buffer tank, the first flow meter is connected with the controller, and an outlet of the first centrifugal pump is divided into two branches after passing through the first flow meter.
8. The acid liquor preparation process according to claim 1, wherein the acid liquor to be prepared comprises the following components in percentage by mass: 45-60% of hydrochloric acid, 0.3-0.6% of gelling agent, 1.0-2.5% of iron ion stabilizer, 1.5-3.5% of corrosion inhibitor, 1.0-1.5% of corrosion inhibition synergist, 0.5-1.0% of cleanup additive, 0.5-1.0% of clay stabilizer and the balance of water.
9. Acid liquor formulation process according to claim 1, characterized in that the gelling agent is selected from cationic acrylamide based polymers or polyvinylpyrrolidone.
10. The acid liquor preparation process according to claim 1, wherein the iron ion stabilizer is at least one selected from the group consisting of citric acid, WC-1 acidifying iron ion stabilizer, PY-33 acidifying iron ion stabilizer, sodium nitrilotriacetate, sodium erythorbate, tetrasodium hexanediaminedisulphonate and sodium diacetate tetraacetate.
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| CN107652965A (en) * | 2016-07-26 | 2018-02-02 | 中国石油天然气股份有限公司 | A kind of low frictional resistance gel acid and preparation method thereof |
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| US3923666A (en) * | 1973-02-26 | 1975-12-02 | Halliburton Co | Method and composition for acidizing and fracturing wells |
| CN103521123A (en) * | 2013-10-11 | 2014-01-22 | 长兴埃克森科技有限公司 | Automatic preparation system for dilute sulfuric acid |
| CN107652965A (en) * | 2016-07-26 | 2018-02-02 | 中国石油天然气股份有限公司 | A kind of low frictional resistance gel acid and preparation method thereof |
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