CN210948623U - Testing arrangement of acid rock reaction rate in acid fracturing - Google Patents
Testing arrangement of acid rock reaction rate in acid fracturing Download PDFInfo
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- CN210948623U CN210948623U CN201922024539.1U CN201922024539U CN210948623U CN 210948623 U CN210948623 U CN 210948623U CN 201922024539 U CN201922024539 U CN 201922024539U CN 210948623 U CN210948623 U CN 210948623U
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Abstract
The application discloses sour rock reaction rate's testing arrangement in acid fracturing, including the acid tank, water pitcher and waste liquid jar, acid tank and water pitcher communicate acid etching crack guiding gutter respectively, two rock plates of parallel interval installation in the acid etching crack guiding gutter, interval between two rock plates is used for simulating the crack, the acid tank, water pitcher and acid etching crack guiding gutter are all installed in the thermostated container, acid etching crack guiding gutter passes through output pipeline intercommunication waste liquid jar, output pipeline is located the inside position installation tee bend valve of thermostated container, pipeline intercommunication acid tank is passed through to tee bend valve's one end, be applicable to the acidizing fluid circulation. The reaction temperature is convenient to control by adopting the constant temperature box; the rock plate is used for simulating the fracture width, the fracture width is closer to the acid liquid flowing process in the actual reservoir fracture, the acid rock reaction speed is measured through the change of the rock plate quality, the method is simple, and the measured acid rock reaction speed is closer to the parameters under the actual stratum condition; the three-way valve can enable the acid liquor to circularly flow in the diversion trench, and simulate the reaction law of partial acid liquor consumption.
Description
Technical Field
The utility model relates to a petroleum engineering technical field, concretely relates to test device of sour rock reaction rate in acid fracturing.
Background
In carbonate rock acid fracturing, acid liquor flows and reacts in a hydraulic fracture, and the acid liquor is gradually consumed and slowly becomes residual acid without reactivity. The acid rock reaction speed is an important parameter for calculating the acid liquid acting time and the acid liquid acting distance, the acid rock reaction speed is measured by using a rotating disc instrument at present, and the instrument is tested by using a small-diameter rock core with the diameter of 1 inch and cannot really represent the reaction speed of the acid liquid when the acid liquid flows in a crack; in addition, the rotating disc instrument replaces the average concentration in the acid tank with the acid liquid concentration at the outlet, and when the acid liquid viscosity is high, the acid liquid is mixed unevenly, and the error is large.
SUMMERY OF THE UTILITY MODEL
In view of the above defects or shortcomings in the prior art, it is desirable to provide a device for testing acid rock reaction rate in acid fracturing, which can more truly reduce the flowing process of acid liquor in a crack, simultaneously recycle the acid liquor at a large discharge amount, and simulate the reaction law of partial acid liquor consumption.
In a first aspect, the utility model discloses a testing arrangement of sour rock reaction rate in acid fracturing, including sour jar, water pitcher and waste liquid jar, sour jar and water pitcher are respectively through the input of pipeline intercommunication acid corrosion crack guiding gutter, two rock plates of the inside parallel interval installation of acid corrosion crack guiding gutter, interval between two rock plates is used for simulating the crack, sour jar, water pitcher and acid corrosion crack guiding gutter are all installed in the thermostated container, output pipeline intercommunication waste liquid jar is passed through to the output of acid corrosion crack guiding gutter, output pipeline is located the inside position installation three way valve of thermostated container, three way valve's one end is passed through pipeline intercommunication sour jar, be applicable to the acidizing fluid circulation.
Preferably, two rock plate chambers are installed in the acid-etching crack diversion trench, a groove is formed in the surface of each rock plate chamber along the length direction of the rock plate chamber, the rock plates are fixed at the bottom of the groove in the direction parallel to the opening direction of the groove, the openings of the two grooves are buckled together to form a closed channel for acid liquor circulation, and the center of the closed channel is opposite to the center of the opening, used for connecting a pipeline, on the two sides of the acid-etching crack diversion trench.
Preferably, install two rock plate rooms in the acid-etched crack guiding gutter, every rock plate room surface all sets up the recess along rock plate room length direction, a plurality of mounting grooves are evenly seted up along recess depth direction interval to the inside relative lateral wall of recess, the rock plate is installed in the mounting groove, the interval between the rock plate is changed through the position of adjustment rock plate installation, two recess opening lock joints are in the same place and are constituteed the closed passage that is used for the acidizing fluid circulation, the center of passageway is just being used for the opening center of connecting line to acid-etched crack guiding gutter both sides.
Preferably, the cross-section of the groove is semicircular or U-shaped.
Preferably, a protruding portion is arranged on the edge of the surface where the groove of one rock plate chamber is located, a recessed portion is correspondingly arranged on the opposite surface of the other rock plate chamber, and the distance between the two rock plates is adjusted by adjusting the depth of the protruding portion matched with the recessed portion.
Preferably, the protrusion includes a plurality of cylindrical or cubic protrusions arranged at intervals.
Preferably, the matching part of the convex part and the concave part is provided with a gasket.
Preferably, the gasket is provided with a through hole corresponding to the protruding part.
Preferably, a constant-speed and constant-pressure pump is installed on a pipeline through which the acid tank and the water tank are respectively communicated with the acid-etched crack diversion trench.
Preferably, a back pressure valve is arranged on the output pipeline.
The utility model discloses a testing arrangement of sour rock reaction rate in acid fracturing has following beneficial effect at least:
the reaction temperature is convenient to control by adopting the constant temperature box; the method has the advantages that the distance between the rock plates is adjusted by adjusting the installation position of the rock plates in the rock plate chamber or the thickness of the gaskets on the rock plate chamber, the width of the cracks is simulated, the rock plates are used for simulating the width of the cracks, an acid liquid displacement experiment is carried out, the experiment process is closer to the acid liquid flowing process in the cracks of a real reservoir, the acid rock reaction speed can be measured through the change of the quality of the rock plates, the test method is simple, and the measured acid rock reaction speed is closer to the parameters under the actual stratum condition; the design of the three-way valve forms a circulation system, so that the acid liquor can circularly flow in the diversion trench, and the reaction rule of partial consumed acid liquor is simulated.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a device for testing acid rock reaction rate in acid fracturing according to an embodiment of the present invention;
figure 2 is a front view of one of the slate chambers of the present invention;
figure 3 is a left side view of one of the slate chambers of the present invention;
figure 4 is a top view of one of the slate chambers of the present invention;
fig. 5 is a front view of another slate chamber of the present invention;
fig. 6 is a left side view of another slate chamber of the present invention;
fig. 7 is a top view of another slate chamber of the present invention;
fig. 8 is a schematic side view of two slate chambers in another embodiment of the present invention;
FIG. 9 is a schematic structural view of an embodiment of a rock plate;
fig. 10 is a schematic view of the structure of the gasket.
In the figure, 1, an acid tank, 2, a water tank, 3, an acid-resistant constant-speed constant-pressure pump, 4, an acid-etched crack diversion trench, 5, a back pressure valve, 6, a waste liquid tank, 7, a three-way valve, 8, a rock plate, 9, a thermostat, 10, a rock plate chamber, 11, a groove, 12, a bulge, 13, a depression, 14, a gasket and 15, installation grooves are formed.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The utility model discloses a testing arrangement of sour rock reaction rate in acid fracturing of an embodiment, as shown in figure 1, including sour jar 1, water pitcher 2 and waste liquid jar 6, sour jar 1 and water pitcher 2 are respectively through the input of pipeline intercommunication acid corrosion crack guiding gutter 4, two rock plates 8 of the inside parallel interval installation of acid corrosion crack guiding gutter 4, interval between two rock plates 8 is used for simulating the crack, sour jar 1, water pitcher 2 and acid corrosion crack guiding gutter 4 are all installed in thermostated container 9, the output of acid corrosion crack guiding gutter 4 passes through output pipeline intercommunication waste liquid jar 6, the output pipeline is located the inside position installation three-way valve 7 of thermostated container 9, pipeline intercommunication acid pitcher 1 is passed through to three-way valve 7's one end, be applicable to the acidizing fluid circulation.
It should be noted that acid liquor is filled in the acid tank 1, brine is filled in the water tank 2, a crack is simulated by using the distance between the two rock plates 8, the width between the two rock plates 8 can be conveniently adjusted, the actual crack width in the underground can be more accurately simulated, the two rock plates 8 are parallelly installed in the acid-etched crack guiding groove 4, the width of the underground crack can be accurately simulated by adjusting the installation positions of the rock plates 8 in the acid-etched crack guiding groove 4, compared with the existing method for simulating the crack, the method of the embodiment can be conveniently adjusted, and the flowing of the acid liquor in the crack is closer to the real underground environment. The acid liquor flows through the gaps among the rock plates to react, the reaction speed of the acid rock can be accurately obtained by measuring the change of the rock plate quality, the device of the embodiment not only overcomes the problems that the rotary disc instrument cannot simulate the flowing and reaction of the acid liquor in the cracks and the used core is small in size, but also can be used for more truly reducing the flowing process of the acid liquor in the cracks with controllable crack widths, the highest discharge capacity can reach the actual construction discharge capacity, and the calculated reaction speed of the acid rock is more accurate. Simultaneously, all place sour jar 1, water pitcher 2, acid etching crack guiding gutter 4 inside thermostated container 9, can conveniently control reaction temperature for acidizing fluid and salt solution and whole test environment reach the assigned temperature. The three-way valve 7 is arranged on the output pipeline of the acid-etching crack diversion trench 4, and the acid liquor passing through the acid-etching crack diversion trench 4 can controllably flow through the acid tank 1 and the waste liquid tank 6 by controlling the three-way valve 7. For example, say: when the reaction starts, the three-way valve 7 is controlled, so that the acid etching crack diversion trench 4 is communicated with the acid tank 1, the contact time of the acid liquid and the rock plate 8 is short under the condition of large discharge, the concentration change of the flowing-out acid liquid is small, and the acid liquid can be repeatedly used, so that the acid liquid circulation is ensured by the three-way valve 7, and the acid liquid waste is avoided.
In some embodiments, two rock plate chambers 10 are installed in the acid-etched fracture guiding gutter 4, as shown in fig. 2 and 5, a groove 11 is formed in the surface of each rock plate chamber 10 along the length direction of the rock plate chamber 10, a rock plate 8 is fixed at the bottom of the groove 11 parallel to the opening direction of the groove 11, the openings of the two grooves 11 are buckled together to form a closed channel for acid liquid circulation, and the center of the channel is opposite to the center of the opening for connecting the pipeline on the two sides of the acid-etched fracture guiding gutter 4. Fix the rock plate 8 through rock plate room 10, overcome two rock plates 8 and can't conveniently fix inside acid etching crack guiding gutter 4, design rock plate room 10, at first can be with rock plate room 10 both ends rigid coupling end cap, rethread bolt and end cap fixed connection, and fix rock plate room 10 in acid etching crack guiding gutter 4, recess 11 of seting up on the surface of rock plate room 10, with two rock plate rooms 10 along recess 11 opening direction lock joint together, the passageway of acidizing fluid circulation has been formed, through adjusting the relative clearance between two rock plate rooms 10, interval between two rock plates 8 of regulation that can be convenient, simulate actual crack width more accurately.
As another embodiment, two rock plate chambers 10 are installed in the acid-etched fracture guiding gutter, a groove 11 is formed in the surface of each rock plate chamber 10 along the length direction of the rock plate chamber 10, as shown in fig. 8, a plurality of installation grooves 15 are uniformly formed in opposite side walls inside the groove 11 along the depth direction of the groove 11 at intervals, the rock plates are installed in the installation grooves 15, the distance between the rock plates is changed by adjusting the installation position of the rock plates, the two grooves 11 are buckled together to form a closed channel for acid liquor circulation, and the center of the channel is right opposite to the center of the opening for connecting the pipeline on two sides of the acid-etched fracture guiding gutter 4. In this embodiment, the two rock plate chambers have the same structure, the mounting grooves 15 are formed in the opposite side walls inside the groove 11, and the mounting grooves 15 are arranged at intervals along the depth direction of the groove 11, so that after the position of the rock plate chamber 10 is fixed, according to the width of the simulated crack, when the distance between the rock plates 8 is small, the rock plates 8 in the two rock plate chambers 10 can be moved into the mounting grooves 15 close to the bottom of the groove respectively, the controllable adjustment of the distance between the rock plates 8 is realized, or the position of the rock plate 8 in the mounting groove 15 in one rock plate chamber 10 can be adjusted. This way the adjustment of the distance of the rock plates 8 is conveniently achieved by the position of the mounting groove 15 without moving the rock plate chamber 10.
Further, the cross section of the groove 11 is semicircular or U-shaped.
In some embodiments, in order to adjust the distance between the rock plates 8, as shown in fig. 3 and 4, a protruding portion 12 may be provided on the edge of the surface where the groove 11 of one rock plate chamber 10 opens, as shown in fig. 6 and 7, a recessed portion 13 may be provided on the opposite surface of the other rock plate chamber 10, and the distance between the two rock plates 10 may be adjusted by adjusting the depth of the protruding portion 12 and the recessed portion 13. After the mode is used for fixing the rock plates 8 at the installation positions in the grooves 11, the positions of the rock plates 8 do not need to be adjusted, and the distance between the two rock plates 8 can be conveniently adjusted.
Further, the protruding portion includes a plurality of cylindrical or cubic protrusions arranged at intervals. The cylindrical or cubic bumps arranged at intervals can better realize the matching and fixing between the two rock plate chambers 10, meanwhile, the cylindrical and the three-dimensional bumps have certain heights, enough space is reserved for adjusting the distance, and the distance between the two rock plates 8 can meet different crack widths.
In a preferred embodiment, a gasket 14 is arranged at the matching position of the convex part 12 and the concave part 13. The gasket 14 not only can guarantee closely to cooperate between two rock plate rooms 10, and simultaneously, the gasket 10 has certain thickness, and here does not limit the concrete thickness of gasket 14, adjust according to actual need can, on the basis of not adjusting the position between rock plate 8 and the rock plate room 10, can adjust through the gasket that increases the thickness difference for the required crack width of simulation.
As shown in fig. 9, both ends of the rock plate 8 may be semicircular, the rock plate 8 may be a solid block, and the shape of the rock plate 8 is not limited because the rock plate 8 is installed in the rock plate chamber 10.
Preferably, as shown in fig. 10, the spacer 14 is provided with a through hole corresponding to the boss. The through-holes facilitate the fit of the gasket 14 between the raised portion 12 and the recessed portion 13.
Further, a constant-speed and constant-pressure pump 3 is arranged on a pipeline through which the acid tank 1 and the water tank 2 are respectively communicated with the acid-etched crack diversion trench 4. The acid-resistant constant-speed constant-pressure pump 3 is used for pumping the acid liquor in the acid tank 1 and the saline water in the water tank 2 into the acid-etched crack diversion trench 4, and keeping the acid liquor capable of entering the acid-etched crack diversion trench 4 to react under certain pressure and speed.
In order to adjust the back pressure on the output pipeline during the test, a back pressure valve 5 is arranged on the output pipeline.
The utility model discloses an implementation method of testing arrangement of acid rock reaction rate in acid fracturing is as follows:
step 1, preparing rock plate 8
Preparing two rock plates 8 with the length of ×, the width of × and the height of 17.78 × 3.81.81 3.81 × (2-3) centimeters by using the oil reservoir rock core with the lithology of carbonate rock, wherein two ends of each rock plate 8 are in a semi-arc shape;
Weighing the following raw materials in percentage by mass: 0.7% of thickening agent, 1% of cleanup additive, 15% of hydrochloric acid, 1% of iron ion stabilizer, 1% of acidification corrosion inhibitor and 86.9% of clear water, and mixing the raw materials according to the proportion to obtain acid liquor;
wherein the thickener is a cross-linked acid thickener provided by Chengdu Jianxiang Shu technology GmbH;
the cleanup additive is an acidizing fracturing cleanup additive provided by Chengdu Jianxiang Shuguan science and technology limited company;
the hydrochloric acid is industrial hydrochloric acid with the mass concentration of 31%;
the iron ion stabilizer is provided by Chengdu Jianxiang Shu Guan science and technology limited;
the acidizing corrosion inhibitor is provided by Chengdu Jianxiang Shu Guangxi technology company;
weighing the following raw materials in percentage by mass: NaCl3.5%, CaCl20.75％，MgCl20.3 percent of water and 95.45 percent of clear water, and the raw materials are mixed according to the proportion to obtain saline water;
step 6, operating the tee joint 7 to enable the pipeline between the acid-etched crack diversion trench 4 and the acid tank 1 to be communicated, closing the pipeline of the waste liquid tank 6, displacing with acid liquor, stopping acid supply after 20min, sequentially opening a pipeline switch of the waste liquid tank 6 on the tee joint 7, closing the pipeline switch of the acid tank 1 on the tee joint 7, converting into saline displacement, driving out all acid liquor, stopping the acid-resistant constant-speed constant-pressure pump 3, cooling the rock plates 8 to normal temperature, removing the pipeline, and weighing the total mass m of the two rock plates 82＝636.25g；
Acid rock reaction rate
Wherein, A ═ pi (H/2)2+ H (L-H), L-17.78 cm for the length of the slab 8, H-3.81 cm for the width of the slab 8, t-20 min, MWcarboante＝100g/mol，a＝2；
To obtain
Claims (10)
1. The utility model provides a testing arrangement of sour rock reaction rate in acid fracturing, includes sour jar, water pitcher and waste liquid jar, its characterized in that, the sour jar with the water pitcher is respectively through the input of pipeline intercommunication acid corrosion crack guiding gutter, two rock plates of the inside parallel interval installation of acid corrosion crack guiding gutter, interval between two rock plates are used for simulating the crack, the sour jar the water pitcher with acid corrosion crack guiding gutter is all installed in the thermostated container, the output of acid corrosion crack guiding gutter passes through output pipeline intercommunication waste liquid jar, output pipeline is located the inside position installation three way valve of thermostated container, the pipeline intercommunication is passed through to three way valve's one end the sour jar is applicable to the acidizing fluid circulation.
2. The device for testing acid rock reaction speed in acid fracturing as claimed in claim 1, wherein two rock plate chambers are installed in the acid fracturing diversion trench, a groove is formed in the surface of each rock plate chamber along the length direction of the rock plate chamber, the rock plates are fixed at the bottom of the groove in a direction parallel to the opening direction of the groove, the two groove openings are buckled together to form a closed channel for acid liquor circulation, and the center of the channel is over against the center of the opening on two sides of the acid fracturing diversion trench for connecting the pipeline.
3. The device for testing acid rock reaction rate in acid fracturing as claimed in claim 1, wherein two rock plate chambers are installed in the acid fracturing diversion trench, each rock plate chamber surface is provided with a groove along the length direction of the rock plate chamber, a plurality of installation grooves are evenly formed on opposite side walls in the grooves along the depth direction of the grooves at intervals, the rock plates are installed in the installation grooves, the distance between the rock plates is changed by adjusting the installation position of the rock plates, two groove openings are buckled together to form a closed channel for acid liquor circulation, and the center of the channel is right opposite to the opening centers of the connecting pipelines on two sides of the acid fracturing diversion trench.
4. The device for testing the acid rock reaction speed in acid fracturing as claimed in claim 2 or 3, wherein the cross section of the groove is semicircular or U-shaped.
5. The device for testing acid rock reaction speed in acid fracturing as claimed in claim 2, wherein a raised part is arranged on the edge of the surface where the groove of one of the rock plate chambers is opened, a recessed part is correspondingly arranged on the surface of the other rock plate chamber opposite to the raised part, and the distance between the two rock plates is adjusted by adjusting the depth of the matching between the raised part and the recessed part.
6. The device for testing acid rock reaction speed in acid fracturing as claimed in claim 5, wherein the protruding part comprises a plurality of cylindrical bumps or cubic bumps arranged at intervals.
7. The device for testing the acid rock reaction speed in acid fracturing as claimed in claim 5, wherein a gasket is arranged at the matching position of the convex part and the concave part.
8. The device for testing acid rock reaction rate in acid fracturing as claimed in claim 7, wherein the gasket is provided with a through hole corresponding to the protrusion.
9. The device for testing the acid rock reaction speed in acid fracturing as claimed in claim 1, wherein the constant-speed constant-pressure pump is mounted on a pipeline through which the acid tank and the water tank are respectively communicated with the acid-eroded fissure diversion trench.
10. The apparatus for testing acid rock reaction rate in acid fracturing as claimed in claim 1, wherein a back pressure valve is installed on the output pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922024539.1U CN210948623U (en) | 2019-11-21 | 2019-11-21 | Testing arrangement of acid rock reaction rate in acid fracturing |
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| CN201922024539.1U CN210948623U (en) | 2019-11-21 | 2019-11-21 | Testing arrangement of acid rock reaction rate in acid fracturing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114530090A (en) * | 2020-12-01 | 2022-05-24 | 浙江太学科技集团有限公司 | Can confirm to beat assembly type structure outer wall of gluing closely knit degree and glue real standard device |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114530090A (en) * | 2020-12-01 | 2022-05-24 | 浙江太学科技集团有限公司 | Can confirm to beat assembly type structure outer wall of gluing closely knit degree and glue real standard device |
| CN114530090B (en) * | 2020-12-01 | 2023-12-22 | 浙江太学科技集团有限公司 | Building outer wall gluing training device capable of determining gluing compactness |
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