阅读说明：本技术 一种页岩分段压裂水平井压裂液返排能力评价装置及评价方法 (Shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device and evaluation method ) 是由 张烨 方光建 陆朝晖 李平 郭晓中 王锦喜 余华文 宋科雄 欧阳黎明 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种页岩分段压裂水平井压裂液返排能力评价装置,包括底板和测试箱,所述底板顶部的中部与测试箱的底部固定连接,所述测试箱顶部的背部固定连接有合页,所述玻璃板正表面的顶部和底部的两侧且位于测试箱的正表面固定连接有测试指杆,所述测试箱正表面的两侧均固定连接有测试齿纹,本发明涉及压裂液返排测试技术领域。该页岩分段压裂水平井压裂液返排能力评价装置及评价方法,可以让工作人员在进行多项对比试验时能够更加方便,可以一次性测试多个返排液试验,而且还能够对其进行对比,让返排液的对比实验更加方便,让工作人员的测试变的更加便捷,等待对比测试结果的时间缩短,使人们使用起来更加方便。(The invention discloses a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device which comprises a bottom plate and a test box, wherein the middle part of the top of the bottom plate is fixedly connected with the bottom of the test box, the back of the top of the test box is fixedly connected with a hinge, two sides of the top and the bottom of the front surface of a glass plate are fixedly connected with test fingers positioned on the front surface of the test box, and two sides of the front surface of the test box are fixedly connected with test insections. This shale staged fracturing horizontal well fracturing fluid flowback ability evaluation device and evaluation method can let the staff can be more convenient when carrying out multinomial contrast test, can once only test a plurality of flowback liquid tests, but also can contrast it, and it is more convenient to let the contrast experiment of flowing back liquid, and it is more convenient to let the test of staff become, and the time of waiting for contrast test result shortens, and it is more convenient to make people use.)

1. The utility model provides a shale staged fracturing horizontal well fracturing fluid flowback ability evaluation device, includes bottom plate (1) and test box (2), the bottom fixed connection of the middle part at bottom plate (1) top and test box (2), its characterized in that: the testing device is characterized in that a hinge (3) is fixedly connected to the edge of the top of the testing box (2), a protective cover (4) is fixedly connected to one side, away from the testing box (2), of the surface of the hinge (3), a placing groove (5) is formed in the top of an inner cavity of the protective cover (4), a glass plate (6) is fixedly connected to the middle of the front surface of the testing box (2), a testing finger rod (7) is fixedly connected to the top and the bottom of the front surface of the glass plate (6) and between the two sides of the surface of the testing box (2), testing insections (8) are fixedly connected to both sides of the front surface of the testing box (2), baffle plates (9) are fixedly connected to both sides of the front surface and the back of the inner cavity of the testing box (2), and testing barrels (10) are fixedly connected to both sides of the two baffle plates (9) and at, the middle parts of two sides of the test box (2) are respectively and fixedly connected with a fixing plate (11) and a mounting plate (12).

2. The shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device of claim 1, wherein: the middle part of the left side of the fixing plate (11) is fixedly connected with an electronic timer (20), and the middle part of the right side of the mounting plate (12) is fixedly connected with a rotating shaft (13).

3. The shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device of claim 2, wherein: the surface of the rotating shaft (13) is fixedly connected with a placing frame (14), the top and the bottom of the placing frame (14) are fixedly connected with a rotating sleeve (15), and a fixing bolt (16) penetrates through the middle of the surface of the rotating sleeve (15).

4. The shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device of claim 3, wherein: an hourglass (17) is fixedly connected to the middle between the top and the bottom of the inner cavity of the placement frame (14), fine sand is filled in the bottom of the inner cavity of the hourglass (17), and the left end of the fixing bolt (16) is fixedly connected with the surface of the mounting plate (12).

5. The shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device of claim 1, wherein: discharging pipe (18) have been seted up to the bottom plate of experimental section of thick bamboo (10) back to the fixed surface of discharging pipe (18) is connected with control valve (19), the one end of discharging pipe (18) runs through test box (2) and extends to the outside of test box (2).

6. An evaluation method using the shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device according to any one of claims 1-5, characterized by comprising the following steps;

s1, firstly, determining the position where the fracturing fluid flowback test needs to be carried out, then determining certain volume of flowback fluid through a measuring device, and recording the selected flowback fluid, wherein the quantity of the flowback fluid is changed according to the size of a test range, the larger the test place is, the more the quantity of the flowback fluid is, and the smaller the test place is, and the test can be carried out after the quantity of the flowback fluid is checked and recorded;

s2, pouring all prepared flowback liquid suitable for the test into the shale staged fracturing horizontal well, starting an electronic timer (20) at the same time, and timing through the electronic timer (20); when the equipment is powered off, the fixing bolt (16) is screwed to rotate the placing frame (14), then the placing frame (14) is placed to enable the hourglass (17) inside the placing frame to be inverted, so that fine sand inside the hourglass can flow, the method is used for timing, and if the fine sand inside the hourglass (17) completely flows and the test is not finished, the placing frame (14) is inverted again to carry out an accumulation test;

s3, after the flowback liquid is completely poured into the shale staged fracturing horizontal well, a collecting device is immediately prepared at a flowback liquid outlet, all the flowing flowback liquid is collected until the flowback liquid cannot continuously flow out of the shale staged fracturing horizontal well, which represents that the test is finished, at the moment, the timing of an electronic timer (20) can be stopped or an hourglass (17) can be turned over, so that the fine sand in the parallel state stops flowing, and then the respective recorded working time is collected and summarized;

s4, taking out the collecting container arranged at the outlet of the return liquid, then pouring all the return liquid in the container into a test cylinder (10), separately placing the return liquid at different places or with different properties, pouring the return liquid into different test cylinders (10), detecting the outflow speed and the outflow volume of the return liquid and the volume of the solution consumed in the return process, observing the quantity of the return liquid through a test finger rod (7) and a test insection (8) on the surface of a test box (2), comparing the quantity with other test cylinders (10) in which different return liquids are arranged, and analyzing and summarizing the results of the return liquid test;

and S5, summarizing and analyzing the data collected by all tests, comparing the data to obtain the position and the return liquid of the optimal return test, testing the position and the return liquid for multiple times, taking the average value of the position and the return liquid, and finally obtaining the optimal return method and the optimal return point for evaluation, wherein when the equipment needs to be used again, the discharge pipe (18) is opened through the control valve (19), the discharge pipe (18) is unblocked, and then the return liquid in the discharge pipe is discharged.

Technical Field

The invention relates to the technical field of fracturing fluid flowback tests, in particular to a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device and an evaluation method.

Background

The fracturing fluid is a heterogeneous unstable chemical system formed by a plurality of additives according to a certain proportion, is a working fluid used for fracturing modification of an oil-gas layer, and has the main functions of transmitting high pressure formed by ground equipment into a stratum, enabling the stratum to fracture to form a fracture and conveying a propping agent along the fracture.

The process of hydraulic fracturing of oil reservoir is to use a high-pressure large-displacement pump on the ground, and to use the principle of liquid pressure transmission, to inject liquid (generally called fracturing liquid) with a certain viscosity into the oil reservoir at a pressure greater than the absorption capacity of the oil reservoir, and to gradually raise the pressure in the well bore, so as to build up a high pressure at the bottom of the well, and when the pressure is greater than the ground stress near the well wall and the tensile strength of the stratum rock, to generate cracks in the stratum near the bottom of the well: and continuously injecting a sand carrying fluid with a propping agent, extending the fracture forwards and filling the fracture with the propping agent, and closing the fracture on the propping agent after closing the well, so that a sand filling fracture with a certain geometric dimension and high flow conductivity is formed in the stratum near the bottom of the well, and the purpose of increasing the production and injection of the well is achieved. The commonly used propping agents include quartz sand, ceramsite and the like.

The existing shale staged fracturing horizontal well fracturing fluid flowback capability evaluation method and device can not simultaneously and conveniently carry out a plurality of comparison tests, so that the integral test time is greatly prolonged, and the time for workers to learn data is prolonged, while the existing multi-comparison test method is a single test or a plurality of devices are used for testing simultaneously, which is very troublesome, and consumes too much cost and resources, which is not beneficial to people to use,

disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation method and device, and solves the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device comprises a bottom plate and a test box, the middle part of the top of the bottom plate is fixedly connected with the bottom of the test box, the edge of the top of the test box is fixedly connected with a hinge, a protective cover is fixedly connected to the surface of the hinge and positioned at one side far away from the test box, a placing groove is formed in the top of the inner cavity of the protective cover, and the middle part of the front surface of the test box is fixedly connected with a glass plate, the top and the bottom of the front surface of the glass plate, which are positioned between the two sides of the surface of the test box, are fixedly connected with test fingers, the equal fixedly connected with test insection in both sides on test box positive surface, the equal fixedly connected with baffle in both sides between test box inner chamber front and the back, two just be located the equal fixedly connected with test section of thick bamboo in both sides of test box inner chamber bottom between the baffle, the middle part difference fixedly connected with fixed plate and mounting panel of test box both sides.

Preferably, the middle part of the left side of the fixing plate is fixedly connected with an electronic timer, and the middle part of the right side of the mounting plate is fixedly connected with a rotating shaft.

Preferably, the surface of the rotating shaft is fixedly connected with a placing frame, the top and the bottom of the placing frame are fixedly connected with a rotating sleeve, and a fixing bolt penetrates through the middle of the surface of the rotating sleeve.

Preferably, an hourglass is fixedly connected to the middle between the top and the bottom of the inner cavity of the placement frame, fine sand is filled at the bottom of the inner cavity of the hourglass, and the left end of the fixing bolt is fixedly connected with the surface of the mounting plate.

Preferably, a discharge pipe is arranged on a bottom plate at the back of the test cylinder, a control valve is fixedly connected to the surface of the discharge pipe, and one end of the discharge pipe penetrates through the test box and extends to the outside of the test box.

The invention also aims to provide an evaluation method of the shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device, which comprises the following steps;

s1, firstly, determining the position where the fracturing fluid flowback test needs to be carried out, then determining certain volume of flowback fluid through a measuring device, and recording the selected flowback fluid, wherein the quantity of the flowback fluid is changed according to the size of a test range, the larger the test place is, the more the quantity of the flowback fluid is, and the smaller the test place is, and the test can be carried out after the quantity of the flowback fluid is checked and recorded;

s2, pouring all prepared flowback liquid suitable for the test into the shale staged fracturing horizontal well, starting an electronic timer at the same time, and timing by the electronic timer; when the equipment is powered off, the fixing bolt is screwed to rotate the placing frame, then the placing frame is placed to enable the hourglass inside the placing frame to be inverted, so that fine sand inside the hourglass can flow, the method is used for timing, and if the fine sand inside the hourglass completely flows and the test is still not finished, the placing frame is turned over again to perform an accumulation test;

s3, after the flowback liquid is completely poured into the shale staged fracturing horizontal well, a collecting device is immediately prepared at a flowback liquid outlet, all the flowing flowback liquid is collected until the flowback liquid cannot continuously flow out of the shale staged fracturing horizontal well, which means that the test is finished, at the moment, the timing of an electronic timer or the turning of an hourglass can be stopped, so that the fine sand in the parallel state stops flowing, and then the respective recorded working time is collected and summarized;

s4, taking out the collecting container arranged at the outlet of the return liquid, pouring all the return liquid in the container into a test cylinder, separately placing the return liquid with different places or properties, pouring the return liquid into different test cylinders, detecting the outflow speed and the outflow volume of the return liquid and the volume of the solution consumed in the return process, observing the quantity of the return liquid through a test finger and a test insection on the surface of a test box, comparing the quantity with other test cylinders in which different return liquids are arranged, and analyzing and summarizing the results of the return liquid test;

and S5, summarizing and analyzing data collected by all tests, comparing the data to obtain the position and the return liquid of the optimal return test, testing the position and the return liquid for multiple times, taking the average value of the position and the return liquid, and finally obtaining the optimal return method and the optimal return point for evaluation.

(III) advantageous effects

The invention provides a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation method and device. The method has the following beneficial effects:

(1) the shale staged fracturing horizontal well fracturing fluid flowback capability evaluation method and device can enable workers to be more convenient when multiple contrast tests are carried out, can test multiple flowback fluid tests at one time, can also compare the flowback fluid tests, enable the contrast tests of the flowback fluid to be more convenient, enable the tests of the workers to be more convenient, shorten the time for waiting for contrast test results, enable people to be more convenient to use, and are convenient for people to use.

(2) This shale staged fracturing horizontal well fracturing fluid flowback ability evaluation method and device can let the data that obtain when flowing back the liquid test more accurate, all take notes each step, the flowing back liquid volume of pouring into and taking out also takes notes, finally gathering the analysis, so let the data when flowing back the liquid test more accurate, can not appear the mistake easily, thereby let staff's test result more accurate, made things convenient for later stage construction and use, this does benefit to people and uses.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a cross-sectional view of the front surface structure of the test chamber of the present invention;

FIG. 3 is a cross-sectional view of a side structure of the test chamber of the present invention;

FIG. 4 is a flowchart of the operation of the evaluation method of the present invention.

In the figure, 1-bottom plate, 2-test box, 3-hinge, 4-protective cover, 5-placing groove, 6-glass plate, 7-test finger, 8-test insection, 9-baffle, 10-test cylinder, 11-fixing plate, 12-mounting plate, 13-rotating shaft, 14-placing frame, 15-rotating sleeve, 16-fixing bolt, 17-hourglass, 18-discharging pipe, 19-control valve and 20-electronic timer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 4, an embodiment of the present invention provides a technical solution: a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device comprises the following steps of;

s1, firstly, determining the position of the fracturing fluid to be subjected to the backflow test, then determining the backflow liquid with a certain volume through a measuring device, and recording the selected backflow liquid, wherein the amount of the backflow liquid is changed according to the size of the test range, the larger the test place is, the more the amount of the backflow liquid is, and the smaller the amount of the backflow liquid is, and the test can be performed after the amount of the backflow liquid is checked and recorded.

S2, pouring all prepared flowback fluids suitable for the test into the shale staged fracturing horizontal well, starting the electronic timer 20 at the same time, and timing through the electronic timer 20; when the equipment is powered off, the fixing bolt 16 is screwed to rotate the placing frame 14, then the placing frame 14 is placed to enable the hourglass 17 inside the placing frame 14 to be inverted, so that fine sand inside the hourglass 17 flows, the method is used for timing, and if the fine sand inside the hourglass 17 completely flows and the test is not finished yet, the placing frame 14 is turned over again to carry out the accumulation test.

And S3, after the flowback liquid is completely poured into the shale staged fracturing horizontal well, immediately preparing a collecting device at a flowback liquid outlet, collecting all the flowing flowback liquid until the flowback liquid cannot continuously flow out of the shale staged fracturing horizontal well, which means that the test is finished, stopping timing of the electronic timer 20 or turning the hourglass 17, stopping flowing of the fine sand in the parallel state, and collecting and summarizing the respective recorded working time.

S4, taking out the collecting container arranged at the outlet of the return liquid, then pouring all the return liquid in the container into a test cylinder 10, separately placing the return liquid at different places or with different properties, pouring the return liquid into different test cylinders 10, detecting the outflow speed and the outflow volume of the return liquid and the volume of the solution consumed in the return process, observing the quantity of the return liquid through the test finger 7 and the test insection 8 on the surface of the test box 2, comparing the quantity with other test cylinders 10 in which different return liquids are arranged, and analyzing and summarizing the result of the return liquid test.

And S5, summarizing and analyzing the data collected by all tests, comparing the data to obtain the position and the return liquid of the optimal return test, testing the position and the return liquid for multiple times, taking the average value of the position and the return liquid, and finally obtaining the optimal return method and the optimal return point for evaluation, wherein when the equipment needs to be used again, the discharge pipe 18 is opened through the control valve 19, the discharge pipe 18 is unblocked, and then the return liquid in the discharge pipe is discharged.

Procedure of experiment

The return liquid tests are respectively carried out at seven test sites, the total amount of the return liquid of 3.3m3 is firstly taken out, then the test is carried out, meanwhile, the timing is started, and the flowing-out return liquid and the consumed return liquid are recorded and compared after the experiment is finished.

Test results

As can be seen from the icons, the test results of the flow-back fluid at the four positions of the test tube are optimal, and the optimal place can be selected at the moment.

Please refer to fig. 1-3, which illustrate a technical solution provided by the embodiments of the present invention: a shale staged fracturing horizontal well fracturing fluid flowback capability evaluation device comprises a bottom plate 1 and a test box 2, wherein the middle part of the top of the bottom plate 1 is fixedly connected with the bottom of the test box 2, the edge of the top of the test box 2 is fixedly connected with a hinge 3, the surface of the hinge 3 and the side far away from the test box 2 are fixedly connected with a protective cover 4, the top of the inner cavity of the protective cover 4 is provided with a placing groove 5, the middle part of the front surface of the test box 2 is fixedly connected with a glass plate 6, the top and the bottom of the front surface of the glass plate 6 and the side between the two sides of the surface of the test box 2 are both fixedly connected with a test finger 7, the two sides of the front surface of the test box 2 are both fixedly connected with test insections 8, the two sides between the front and the back of the inner cavity of the test box 2 are both fixedly connected with baffles 9, and, the test cylinder 10 is a measuring cylinder, and is a glass instrument for measuring liquid, and the measuring cylinder is an instrument for measuring the volume of the liquid. The specification is expressed by the maximum capacity mL that can be measured, and the middle parts of both sides of the test box 2 are fixedly connected with a fixed plate 11 and a mounting plate 12, respectively.

In the present invention, an electronic timer 20 is fixedly connected to the middle of the left side of the fixing plate 11, and a rotation shaft 13 is fixedly connected to the middle of the right side of the mounting plate 12.

In the present invention, the surface of the rotating shaft 13 is fixedly connected with a placing frame 14, the top and the bottom of the placing frame 14 are both fixedly connected with a rotating sleeve 15, and a fixing bolt 16 penetrates through the middle part of the surface of the rotating sleeve 15.

In the invention, the middle part between the top and the bottom of the inner cavity of the placing frame 14 is fixedly connected with the hourglass 17, the bottom of the inner cavity of the hourglass 17 is filled with fine sand, and the left end of the fixing bolt 16 is fixedly connected with the surface of the mounting plate 12.

In the invention, a discharge pipe 18 is arranged on the bottom plate at the back of the test tube 10, a control valve 19 is fixedly connected to the surface of the discharge pipe 18, and one end of the discharge pipe 18 penetrates through the test box 2 and extends to the outside of the test box 2.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.