CN114320283A - Experimental device and experimental method for settlement differentiation in temporary plugging agent seam - Google Patents
Experimental device and experimental method for settlement differentiation in temporary plugging agent seam Download PDFInfo
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- CN114320283A CN114320283A CN202011080398.6A CN202011080398A CN114320283A CN 114320283 A CN114320283 A CN 114320283A CN 202011080398 A CN202011080398 A CN 202011080398A CN 114320283 A CN114320283 A CN 114320283A
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- plugging agent
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Abstract
The invention provides an experimental device and an experimental method for settlement differentiation in a temporary plugging agent seam. Wherein, experimental apparatus that subsides differentiation in temporary plugging agent seam includes: a liquid storage tank for storing liquid; the pump body is communicated with the liquid storage tank; the press is provided with a preset seam width, a flow guide chamber is formed in the press, and the flow guide chamber is provided with a rough inner surface; the intermediate container is used for storing the temporary plugging agent, two ends of the intermediate container are respectively communicated with the pump body and the flow guide chamber, the pump body pumps liquid in the liquid storage tank into the intermediate container and drives the temporary plugging agent in the intermediate container to enter the flow guide chamber, and the temporary plugging agent is differentially settled in the flow guide chamber; and the liquid outlet tank is communicated with the diversion chamber and collects the liquid flowing out of the diversion chamber. The invention solves the problem that the sedimentation differentiation rule of the temporary plugging agent in the crack can not be effectively and reliably simulated and researched in the prior art.
Description
Technical Field
The invention relates to the technical field of hydraulic fracturing, in particular to an experimental device and an experimental method for settlement differentiation in a temporary plugging agent joint.
Background
The compact reservoir has the characteristics of poor physical properties and low yield generally, and needs fracturing to obtain the yield. The hydraulic fracture volume modification needs a temporary plugging agent, and the good temporary plugging agent has very important significance for temporary plugging and steering of the hydraulic fracture. In the pumping process of the temporary plugging agent, the sedimentation differentiation can be generated in the cracks inevitably to influence the plugging effect of the temporary plugging agent, so that the deep research on the sedimentation differentiation rule of the temporary plugging agent in the cracks is necessary. At present, the sedimentation differentiation rule of the temporary plugging agent in the cracks is not very clear, so that the component proportion of the whole temporary plugging agent fluid when the temporary plugging agent fluid is transported to the temporary plugging position is difficult to accurately provide, the plugging effect of the temporary plugging agent is influenced, and the field application is seriously influenced.
The technical scheme of the existing patent is that the proppant settling chamber device capable of realizing different degrees of temporary blocking of main seams comprises a first parallel plate device and a second parallel plate device, wherein the first parallel plate device is internally provided with the main seams; the first parallel plate device is provided with a baffle plate for partially blocking fluid in the main slit at the main slit, and the baffle plate is positioned at any position of the main slit; the first and second parallel plate means are transparent. The crack surface formed by connecting the two parallel plates in the technical scheme is smooth, and the condition that the actual crack surface is rough is not considered.
Another patent relates to an experimental device and a working method for visualizing a particle migration rule, which adopts the technical scheme that the device comprises: a liquid supply system, a fracture system, and a pressure controller; the liquid supply system includes: clean water tank, screw pump and liquid preparation tank; the fracture system includes: a visual crack model, a manometer and an image data processing device; the pressure controller is arranged on a pipeline between the screw pump and the visual crack model; the screw pump pumps the liquid in the clean water tank or the liquid distribution tank into the visual crack model; measuring the pressure drop of the visual crack model by a pressure gauge; the image data processing device is used for recording the flow state change of liquid in the visual crack model and the temporary plugging material migration condition; the pressure controller is used for controlling the hydraulic pressure of the liquid pumped out by the screw pump according to the pressure in the pipeline. The flow and circulation of the liquid in the device are realized. The technical scheme only considers a single seam, but does not consider branch seams.
Therefore, the existing related technical schemes can not effectively and reliably carry out simulation research on the sedimentation differentiation rule of the temporary plugging agent in the crack.
Disclosure of Invention
The invention mainly aims to provide an experimental device and an experimental method for the settlement differentiation of a temporary plugging agent in a crack, and aims to solve the problem that the settlement differentiation rule of the temporary plugging agent in the crack cannot be effectively and reliably simulated and researched in the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided an experimental apparatus for testing intra-seam settlement differentiation of a temporary plugging agent, comprising: a liquid storage tank for storing liquid; the pump body is communicated with the liquid storage tank; the press is provided with a preset seam width, a flow guide chamber is formed in the press, and the flow guide chamber is provided with a rough inner surface; the intermediate container is used for storing the temporary plugging agent, two ends of the intermediate container are respectively communicated with the pump body and the flow guide chamber, the pump body pumps liquid in the liquid storage tank into the intermediate container and drives the temporary plugging agent in the intermediate container to enter the flow guide chamber, and the temporary plugging agent is differentially settled in the flow guide chamber; and the liquid outlet tank is communicated with the diversion chamber and collects the liquid flowing out of the diversion chamber.
Further, the intermediate container includes: a container body; the piston is movably arranged in the container body and divides the container body into a first cavity and a second cavity which are separated from each other, the first cavity is communicated with the pump body, the second cavity is used for storing the temporary plugging agent and is communicated with the diversion chamber, when the pump body pumps the liquid in the liquid storage tank into the first cavity, the pressure of the first cavity is increased, the volume of the second cavity is reduced, and the temporary plugging agent in the second cavity enters the diversion chamber.
Further, the side part of the diversion chamber is provided with a transparent structure, and the differential settlement condition of the temporary plugging agent can be observed.
According to another aspect of the present invention, there is provided an experimental method for intra-seam settlement differentiation of a temporary plugging agent, comprising: filling the flow guide chamber of the press with the carrying fluid; pumping the temporary plugging agent into the diversion chamber through the pump body, and keeping a pumping state; and observing the distribution real-time section of the temporary plugging agent in the diversion chamber, the sedimentation velocity of the temporary plugging agent, and the position and the shape of the formed plugging zone.
Furthermore, the carrying fluid has a plurality of types, the raw material of each type of carrying fluid comprises guanidine gum stock solution, and different carrying fluids are adopted to carry out experiments respectively; and/or the pump injection displacement of the pump body is provided with a plurality of grades, the displacement of the temporary plugging agent entering the flow guide chamber is formed into a plurality of grades, and the displacement of different grades is adopted for carrying out experiments respectively.
Furthermore, the temporary plugging agents are various, and each temporary plugging agent is respectively introduced into the diversion chamber and observed.
Further, the particle density of the temporary plugging agent is 1.25 +/-0.05 g/cm3。
Further, the raw material of each temporary plugging agent comprises guanidine gum stock solution, and the raw material of the temporary plugging agent also comprises at least one of granular temporary plugging diversion material and fibrous temporary plugging diversion material.
Further, the raw material of the temporary plugging agent comprises a granular temporary plugging steering material, and the real density of the granular temporary plugging steering material is 1.32 +/-0.02 g/cm3And has a thermal stability greater than 250 ℃.
Further, the raw material of the temporary plugging agent comprises a fibrous temporary plugging steering material, the fiber diameter of the fibrous temporary plugging steering material is 10-20 μm, the length of the fibrous temporary plugging steering material is 4-8mm, and the real density of the fibrous temporary plugging steering material is 1.10-1.35g/cm3The temperature resistant range is 20-200 ℃.
By applying the technical scheme of the invention, the press with the preset slit width is arranged, and the press is provided with the inner surface with the rough surface, so that the guide chamber can simulate the actual slit more truly, and the slit width of the guide chamber can be adjusted according to the requirement, thereby meeting the requirements of various experiments. The intermediate container can separate the liquid in the liquid storage tank from the temporary plugging agent, so that the temporary plugging agent is prevented from being influenced by other media, and the pump body does not need to be in direct contact with the temporary plugging agent, so that adverse effects on the liquid and the temporary plugging agent are avoided. The experimental device of the embodiment can truly simulate the actual crack condition, consider two temporary plugging material types of single and mixed by matching with the experimental method, realize the sedimentation and differentiation effects of temporary plugging agents of different types under the conditions of different discharge capacities and carrier fluids, and provide the reference values of construction parameters such as the formula, the discharge capacity and the like of the temporary plugging agent under the actual condition.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of an experimental apparatus for the separation of sedimentation in a temporary plugging agent seam according to the present invention.
Wherein the figures include the following reference numerals:
10. a liquid storage tank; 20. a pump body; 30. a press; 31. a flow guide chamber; 40. an intermediate container; 41. a container body; 42. a piston; 50. and (6) discharging the liquid tank.
Detailed Description
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 invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
The invention provides an experimental device and an experimental method for the settlement differentiation of a temporary plugging agent in a crack, and aims to solve the problem that the settlement differentiation rule of the temporary plugging agent in the crack cannot be effectively and reliably simulated and researched in the prior art.
The experimental device for the settlement differentiation in the temporary plugging agent seam as shown in fig. 1 comprises a liquid storage tank 10 for storing liquid, a pump body 20, a press 30 with a preset seam width, an intermediate container 40 for storing the temporary plugging agent and a liquid outlet tank 50, wherein the pump body 20 is communicated with the liquid storage tank 10; the press 30 is formed with a guide chamber 31, and the guide chamber 31 has a rough inner surface; the two ends of the intermediate container 40 are respectively communicated with the pump body 20 and the diversion chamber 31, the pump body 20 pumps the liquid in the liquid storage tank 10 into the intermediate container 40 and drives the temporary plugging agent in the intermediate container 40 to enter the diversion chamber 31, and the temporary plugging agent is deposited in the diversion chamber 31 in a different way; the liquid discharge tank 50 communicates with the baffle chamber 31 and collects the liquid discharged from the baffle chamber 31.
In the embodiment, the press 30 with the preset slit width is arranged, and the press 30 is provided with the inner surface with the rough surface, so that the diversion chamber 31 can simulate the real slit more truly, and meanwhile, the size of the slit width of the diversion chamber 31 can be adjusted as required, thereby meeting the requirements of various experiments. The intermediate container 40 can separate the liquid in the liquid storage tank 10 from the temporary plugging agent, thereby preventing the temporary plugging agent from being influenced by other media, and the pump body 20 does not need to be in direct contact with the temporary plugging agent, thereby avoiding the adverse effect on the temporary plugging agent and the temporary plugging agent. The experimental device of the embodiment can truly simulate the actual crack condition, consider two temporary plugging material types of single and mixed by matching with the experimental method, realize the sedimentation and differentiation effects of temporary plugging agents of different types under the conditions of different discharge capacities and carrier fluids, and provide the reference values of construction parameters such as the formula, the discharge capacity and the like of the temporary plugging agent under the actual condition.
In this embodiment, the intermediate container 40 includes a container body 41 and a piston 42, the piston 42 is movably disposed in the container body 41 and divides the container body 41 into a first cavity and a second cavity separated from each other, the first cavity is communicated with the pump body 20 for pumping the liquid in the liquid storage tank 10, and the second cavity is used for storing the temporary plugging agent and is communicated with the diversion chamber 31. In this embodiment, water is used as the liquid in the liquid reservoir 10. When the experiment is carried out, the pump body 20 is started, the pump body 20 pumps the water in the liquid storage tank 10 into the first cavity, the pressure of the first cavity is increased and is greater than that of the second cavity, so that the piston 42 moves towards the second cavity, the volume of the second cavity is reduced, and the temporary plugging agent in the second cavity enters the diversion chamber 31. Therefore, the temporary plugging agent is not contacted with parts such as the pump body 20 and other liquid, and the experimental effect is ensured.
Preferably, the side of the diversion chamber 31 has a transparent structure to form a visual design, so that the differential settlement of the temporary plugging agent in the diversion chamber 31 can be observed conveniently.
The embodiment also provides an experimental method for the internal settlement differentiation of the temporary plugging agent, the experimental method adopts the experimental device, and the experimental method comprises the following steps: filling the diversion chamber 31 of the press 30 with the carrier fluid; pumping the temporary plugging agent into the diversion chamber 31 through the pump body 20, and keeping a pumping state; and observing the distribution real-time section of the temporary plugging agent in the diversion chamber 31, the sedimentation velocity of the temporary plugging agent, and the position and the shape of the formed plugging zone.
The carrying fluid adopted by the embodiment has multiple types, generally speaking, three types are arranged to meet the experimental requirements, and the raw material of each type of carrying fluid comprises guanidine gum stock solution, namely, different materials are added into guanidine gum stock solution with certain concentration to form different types of carrying fluids. During the experiment, different carrier fluids can be adopted to carry out the experiment respectively, so that the differential settlement condition of the temporary plugging agent in the different carrier fluids can be researched respectively.
Similarly, the pump displacement of the pump body 20 is set to a plurality of levels in the present embodiment, and the pump displacement of the temporary plugging agent into the diversion chamber 31 is also set to a plurality of levels in the present embodiment, which is set to three levels, because the displacement of the temporary plugging agent into the diversion chamber 31 is affected by the change of the pump displacement of the pump body 20. During the experiment, the displacement discharge capacity of different grades can be adopted for carrying out the experiment respectively, so that the differential settlement condition of the temporary plugging agent under different displacement discharge capacities can be researched respectively.
In this embodiment, the temporary plugging agents are multiple in number, and each temporary plugging agent is introduced into the diversion chamber 31 and observed during the experiment, so that the effects of sedimentation and differentiation of different types of temporary plugging agents are simulated. Preferably, the temporary plugging agent adopted in the embodiment has the characteristics of high strength, high toughness and self-solubility, and the particle density of the temporary plugging agent is 1.25 +/-0.05 g/cm3The water-based emulsion has good suspension dispersibility in liquid, is easy to carry and pump, and cannot be self-softened and bonded under the conditions of high temperature and high pressure.
Specifically, the raw materials of each temporary plugging agent comprise a guanidine gum stock solution, and the raw materials of the temporary plugging agent further comprise at least one of a granular temporary plugging diversion material and a fibrous temporary plugging diversion material, namely, at least one of the granular temporary plugging diversion material and the fibrous temporary plugging diversion material is added into a certain concentration of the guanidine gum stock solution, so that different types of temporary plugging agents are formed, only one of the temporary plugging agents is added to form a single material, and the other temporary plugging agents is added to form a mixed material. The present embodiment is provided with three temporary plugging agents, that is, a temporary plugging agent formed of a guanidine gum stock solution and a particulate temporary plugging diversion material, a temporary plugging agent formed of a guanidine gum stock solution and a fibrous temporary plugging diversion material, and a temporary plugging agent formed of a guanidine gum stock solution, a particulate temporary plugging diversion material, and a fibrous temporary plugging diversion material. Of course, other types of temporary plugging agents may be used as desired.
Preferably, the real density of the particulate temporary plugging diverting material in the raw material of the temporary plugging agent is 1.32. + -. 0.02g/cm3And has a thermal stability greater than 250 ℃. The fibrous temporary plugging diversion material in the raw material of the temporary plugging agent has the fiber diameter of 10-20 mu m, the length of 4-8mm and the real density of 1.10-1.35g/cm3The temperature resistant range is 20-200 ℃.
Before the experiment, the corresponding temporary plugging agent and carrier fluid are prepared in advance according to the mode or the requirement, the specific numerical value of the displacement is calculated, and then the parameters are changed to carry out the experiment respectively, so that the single and mixed temporary plugging material types can be considered, and the sedimentation and differentiation effects of different types of temporary plugging agents can be simulated under the conditions of different displacement and carrier fluid types.
It should be noted that, a plurality in the above embodiments means at least two.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the problem that the sedimentation differentiation rule of the temporary plugging agent in the crack cannot be effectively and reliably simulated and researched in the prior art is solved;
2. the flow guide chamber can simulate real cracks more truly, and the size of the crack width of the flow guide chamber can be adjusted according to needs, so that the requirements of various experiments are met;
3. the experimental method considers two types of temporary plugging materials, namely single and mixed temporary plugging materials, and realizes the effects of simulating the sedimentation and differentiation of different types of temporary plugging agents under the conditions of different discharge capacities and carrier fluids.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an experimental apparatus that subsides differentiation in temporary plugging agent seam which characterized in that includes:
a liquid storage tank (10) for storing liquid;
the pump body (20), the said pump body (20) communicates with said liquid reservoir (10);
a press (30) with a preset slit width, wherein the press (30) is formed with a diversion chamber (31), and the diversion chamber (31) is provided with a rough inner surface;
the intermediate container (40) is used for storing the temporary plugging agent, two ends of the intermediate container (40) are respectively communicated with the pump body (20) and the diversion chamber (31), the pump body (20) pumps the liquid in the liquid storage tank (10) into the intermediate container (40), the temporary plugging agent in the intermediate container (40) is driven to enter the diversion chamber (31), and the temporary plugging agent is deposited in the diversion chamber (31) in a different mode;
the liquid outlet tank (50) is communicated with the diversion chamber (31), and collects the liquid flowing out of the diversion chamber (31).
2. The laboratory device according to claim 1, characterized in that said intermediate container (40) comprises:
a container body (41);
piston (42), piston (42) activity sets up in container body (41), and will container body (41) are separated for first cavity and the second cavity each other, first cavity with pump body (20) intercommunication, the second cavity is used for storing temporary plugging agent and with water conservancy diversion room (31) intercommunication, work as pump body (20) will liquid pump in liquid storage pot (10) is gone into when in the first cavity, the pressure increase of first cavity, the volume of second cavity reduces, and makes temporary plugging agent in the second cavity gets into water conservancy diversion room (31).
3. The experimental device according to claim 1, characterized in that the side of the diversion chamber (31) has a transparent structure and differential settlement of the temporary plugging agent can be observed.
4. An experimental method for settlement differentiation in a temporary plugging agent joint is characterized by comprising the following steps:
filling a diversion chamber (31) of the press (30) with the carrying fluid;
pumping the temporary plugging agent into the diversion chamber (31) through the pump body (20), and keeping a pumping state;
and observing the distribution real-time section of the temporary plugging agent in the diversion chamber (31), the sedimentation speed of the temporary plugging agent, and the position and the shape of the formed plugging belt.
5. The test method of claim 4, wherein the carrying fluid has a plurality of types, and the raw material of each type of carrying fluid comprises a guanidine gum stock fluid, and the test is performed separately using different carrying fluids; and/or the pump injection displacement of the pump body (20) is provided with a plurality of grades, the displacement of the temporary plugging agent entering the diversion chamber (31) is formed into a plurality of grades, and experiments are respectively carried out by adopting the displacement of different grades.
6. The experimental method according to claim 4, wherein there are a plurality of temporary plugging agents, and each temporary plugging agent is introduced into the diversion chamber (31) and observed.
7. The experimental method according to claim 6, wherein the particle density of the temporary plugging agent is 1.25 ± 0.05g/cm3。
8. The experimental method according to claim 6, wherein the raw material of each temporary plugging agent comprises a guanidine gum stock solution, and the raw material of the temporary plugging agent further comprises at least one of a particulate temporary plugging diversion material and a fibrous temporary plugging diversion material.
9. The experimental method according to claim 8, wherein the raw material of the temporary plugging agent comprises the granular temporary plugging diversion material, and the real density of the granular temporary plugging diversion material is 1.32 ± 0.02g/cm3And has a thermal stability greater than 250 ℃.
10. The experimental method according to claim 8, wherein the raw material of the temporary plugging agent comprises the fibrous temporary plugging diversion material, the fibrous temporary plugging diversion material has a fiber diameter of 10-20 μm, a length of 4-8mm, and a true density of 1.10-1.35g/cm3The temperature resistant range is 20-200 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011080398.6A CN114320283A (en) | 2020-10-10 | 2020-10-10 | Experimental device and experimental method for settlement differentiation in temporary plugging agent seam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011080398.6A CN114320283A (en) | 2020-10-10 | 2020-10-10 | Experimental device and experimental method for settlement differentiation in temporary plugging agent seam |
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| CN114320283A true CN114320283A (en) | 2022-04-12 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190136116A1 (en) * | 2017-03-01 | 2019-05-09 | Petrochina Company Limited | Low-density, high-strength degradable temporary pugging agent and the preparation method and use thereof |
| CN110500076A (en) * | 2019-07-16 | 2019-11-26 | 李新勇 | It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture |
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2020
- 2020-10-10 CN CN202011080398.6A patent/CN114320283A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190136116A1 (en) * | 2017-03-01 | 2019-05-09 | Petrochina Company Limited | Low-density, high-strength degradable temporary pugging agent and the preparation method and use thereof |
| CN110500076A (en) * | 2019-07-16 | 2019-11-26 | 李新勇 | It is a kind of for temporarily blocking up the Complex Temporary Blocking method of turnaround fracture |
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