CN112796700A - Experimental method for plugging performance of temporary plugging agent for fracturing - Google Patents
Experimental method for plugging performance of temporary plugging agent for fracturing Download PDFInfo
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- CN112796700A CN112796700A CN202110188498.9A CN202110188498A CN112796700A CN 112796700 A CN112796700 A CN 112796700A CN 202110188498 A CN202110188498 A CN 202110188498A CN 112796700 A CN112796700 A CN 112796700A
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- plugging agent
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- 238000002474 experimental method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 68
- 238000004088 simulation Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000005485 electric heating Methods 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 7
- 230000015556 catabolic process Effects 0.000 claims abstract description 5
- 238000006731 degradation reaction Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 6
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 2
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 3
- 229920002907 Guar gum Polymers 0.000 abstract description 2
- 239000000665 guar gum Substances 0.000 abstract description 2
- 229960002154 guar gum Drugs 0.000 abstract description 2
- 235000010417 guar gum Nutrition 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 12
- 239000012530 fluid Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a plugging performance experiment method of a temporary plugging agent for fracturing, which comprises the steps of firstly installing equipment, mixing the temporary plugging agent with performance to be detected with instant guar gum and filler after the equipment is installed, dividing the mixture into two parts after the mixture is uniformly mixed, closing a liquid outlet valve below, controlling the pressurization of a booster pump by using a background control system, recording the displacement condition of the temporary plugging agent in a fracturing simulation device every time the pressure is increased by 1MPa, and judging the pressure bearing capacity of the temporary plugging agent according to the increased pressure data and the recorded displacement condition data of the temporary plugging agent; after the pressure is tested, a first part of temporary plugging agent is taken out, a second part of temporary plugging agent is put into the fracturing simulation device, an electric heating belt is wrapped on the periphery of the fracturing simulation device, a liquid outlet valve is opened through a background control system, the background control system controls the electric heating belt to gradually increase the temperature, the flow of liquid flowing out of the lower portion of the fracturing simulation device is tested through a flow sensor, and the heating temperature is monitored through a background in real time. The method can judge the pressure bearing performance and the degradation capability of the temporary plugging agent, and has certain reference significance.
Description
Technical Field
The invention belongs to the technical field of temporary plugging agent plugging performance detection, and particularly relates to a temporary plugging agent plugging performance experimental method for fracturing.
Background
With the further development of society, the world demand for oil is increasing. When a large-scale whole-loading oil field and a high-permeability block are developed and enter a high-water-content middle and later period, the development of a low-permeability and ultra-low-permeability oil and gas reservoir is necessary, and hydraulic fracturing is used as a yield increasing technology and can play an important role in the development process of the low-permeability oil and gas reservoir. Hydraulic fracturing can form cracks with ultrahigh flow conductivity in the stratum, so that the yield of an oil well is increased, but the measure effect cannot be realized once and for all. Along with the development and production of the fracturing well, the crude oil in the oil drainage area controlled by the hydraulic fracture generated for the first time is produced to a high degree, but the large amount of residual oil outside the oil drainage area is used to a low degree. For heterogeneous low-permeability oil and gas reservoirs which enter a high water-cut period, repeated fracturing needs to be carried out for many times in the development process, so that the improvement of the repeated fracturing effect is particularly important. Therefore, more and more students begin to research the fracture temporary plugging and steering fracturing technology aiming at fracture steering, old fractures are temporarily plugged by the temporary plugging agent, new fractures are opened in the longitudinal direction and the plane, so that new oil drainage areas which are not passively used are communicated, the temporary plugging agent in the old fractures is automatically degraded within a certain time, oil layers are not polluted, and the crude oil yield and the final oil recovery rate of the oil fields are improved.
Fracture diverting fracturing techniques employ various diverting control agents to divert the fluid in the formation. According to the principle that fluid flows towards the direction with the minimum resistance, the temporary plugging agent enters a blasthole of a shaft, and partially enters a crack or a high permeable layer in a stratum, filter cake bridging is generated at the blasthole and a high permeable zone to form a differential pressure value higher than the fracture cracking pressure, so that subsequent working fluid can enter the crack and the high permeable zone, fracturing fluid enters a high stress zone or a new crack layer, the generation of a new crack and the laying change of a propping agent are promoted, and a diverting agent for generating bridging is dissolved in stratum water or fracturing fluid after construction is completed, so that the stratum is not polluted. The key of the success of the technology lies in how the plugging performance of the used temporary plugging agent is, namely the temporary plugging agent can plug old cracks in a stratum, so that subsequent working fluid cannot enter the cracks and a high-permeability zone, and the high pressure can be guaranteed to be suppressed during construction so as to realize the diversion of the cracks, so that the method is of great importance for evaluating the plugging performance of the temporary plugging agent.
Therefore, a plugging performance experiment method of the temporary plugging agent for fracturing is needed, the performance of the temporary plugging agent can be tested, and the method has certain practical significance.
Disclosure of Invention
In order to solve the technical problem, the invention provides a temporary plugging agent plugging performance experiment method for fracturing, wherein equipment required by the temporary plugging agent plugging performance experiment comprises: the fracturing simulator, electric heating belt, booster pump, pressure sensor, play liquid valve, flow sensor, the experimental method of temporary plugging agent shutoff performance is:
s1: equipment installation: firstly, arranging a booster pump and a pressure sensor above a fracturing simulator, and arranging a liquid outlet valve and a flow sensor at the bottom of the fracturing simulator;
s2: preparing a temporary plugging agent: mixing a temporary plugging agent with performance to be detected, instant guanidine gum and a filler, uniformly mixing, dividing into two parts, firstly putting the first part of temporary plugging agent into a fracturing simulator, and putting the second part of temporary plugging agent for later use;
s3: and (3) pressure testing: closing a lower liquid outlet valve, controlling the booster pump to boost pressure by using a background control system, recording the displacement condition of the temporary plugging agent in the fracturing simulation device every time the pressure is increased by 1Mpa, and judging the pressure bearing capacity of the temporary plugging agent according to the increased pressure data and the recorded displacement condition data of the temporary plugging agent;
s4: and (3) temperature testing: after the pressure is tested, a first part of temporary plugging agent is taken out, a second part of temporary plugging agent is put into the fracturing simulation device, an electric heating belt is wrapped on the periphery of the fracturing simulation device, a liquid outlet valve is opened through a background control system, the background control system controls the electric heating belt to gradually increase the temperature, the flow of liquid flowing out of the lower portion of the fracturing simulation device is tested through a flow sensor, the heating temperature is monitored in a real-time background mode, and therefore the degradation capability of the temporary plugging agent is judged.
Preferably, the fracturing simulation device is a visual transparent pipeline, the inside of the fracturing simulation device simulates the fracture condition of a real environment, and the outside of the fracturing simulation device is provided with scale marks.
Preferably, the pressure sensor, the booster pump, the liquid outlet valve, the flow sensor and the electric heating belt are connected with a background control system.
Preferably, the filler is one of plant starch, mica powder and talcum powder.
Preferably, the fracturing simulation device is made of high-temperature-resistant materials.
Compared with the prior art, the invention has the beneficial effects that: the fracturing simulator is provided with the fracturing simulator, the electric heating belt, the booster pump, the pressure sensor, the liquid outlet valve and the flow sensor, the pressure condition in a real environment is simulated through the cooperation of the booster pump and the pressure sensor, the pressure bearing performance of the temporary plugging agent is judged, and the fracturing simulator is heated through the cooperation of the electric heating belt and the flow sensor, so that the degradation capability of the temporary plugging agent is judged, and the fracturing simulator has certain reference significance.
Drawings
FIG. 1 is a schematic diagram of the external structure of the apparatus of the present invention;
FIG. 2 is a schematic view of the internal structure of the apparatus of the present invention.
In the figure:
1-a fracturing simulator; 2, a booster pump; 3-a pressure sensor; 4-a liquid outlet valve; 5. a flow sensor; 6-graduation line.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example (b):
a plugging performance experiment method of a temporary plugging agent for fracturing is disclosed, wherein equipment required by the plugging performance experiment of the temporary plugging agent comprises: fracturing simulation device 1, electric heating belt, booster pump 2, pressure sensor 3, play liquid valve 4, flow sensor 5, fracturing simulation device 1 is made by high temperature resistant material, pressure simulation device 1 is visual transparent pipeline, and its inside simulation real environment's crack condition is provided with scale mark 6 in the outside, fracturing simulation device 1 top is provided with booster pump 2, be provided with pressure sensor 3 between booster pump 2 and the pressure simulation device 1, 1 below of fracturing simulation device is provided with out liquid valve 4, be provided with flow sensor 5 on the pipeline of play liquid valve 4 below, pressure sensor 3, booster pump 2, play liquid valve 4, flow sensor 5 and electric heating belt are connected with backstage control system.
Specifically, the experimental method for the plugging performance of the temporary plugging agent comprises the following steps:
(1) equipment installation: firstly, mounting according to the connection mode, mounting a booster pump 2 above a fracturing simulator 1, mounting a pressure sensor 3 between the booster pump 2 and the fracturing simulator 1, arranging a liquid outlet valve 4 below the fracturing simulator 1, mounting a flow sensor 5 below the liquid outlet valve 4, and preparing an electric heating belt to be placed for later use;
(2) preparing a temporary plugging agent: mixing a temporary plugging agent with performance to be detected, instant guar gum and a filler, wherein the filler is one of plant starch, mica powder and talcum powder, the mixture is divided into two parts after being uniformly mixed, firstly, the first part of the temporary plugging agent is placed in a fracturing simulation device, external observation is carried out, the temporary plugging agent is ensured to be placed at the starting point of a scale mark, and the second part of the temporary plugging agent is placed for later use;
(3) and (3) pressure testing: closing a lower liquid outlet valve by using a background control system, controlling the pressurization of a booster pump by using the background control system, monitoring the internal pressure condition of the fracturing simulator 1 in real time by using a pressure sensor 3, observing and recording the displacement condition of the temporary plugging agent in the fracturing simulator through an external scale mark 6 when the pressure is increased by 1Mpa, and judging the pressure bearing capacity of the temporary plugging agent according to the increased pressure data and the recorded displacement condition data of the temporary plugging agent;
(4) and (3) temperature testing: after the pressure is tested, the first part of temporary plugging agent is taken out, the second part of temporary plugging agent is put into the fracturing simulation device 1, an electric heating belt is wrapped on the periphery of the fracturing simulation device 1, a liquid outlet valve 4 below the fracturing simulation device is opened through a background control system, the background control system controls the electric heating belt to gradually increase the temperature, the flow of liquid flowing out of the lower portion of the fracturing simulation device is tested through a flow sensor 5, the heating temperature is monitored through a background in real time, and therefore the degradation capability of the temporary plugging agent is judged.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.
Claims (5)
1. The experimental method for the plugging performance of the temporary plugging agent for fracturing is characterized in that equipment required by the plugging performance experiment of the temporary plugging agent comprises: the fracturing simulator, electric heating belt, booster pump, pressure sensor, play liquid valve, flow sensor, the experimental method of temporary plugging agent shutoff performance is:
s1: equipment installation: firstly, arranging a booster pump and a pressure sensor above a fracturing simulator, and arranging a liquid outlet valve and a flow sensor at the bottom of the fracturing simulator;
s2: preparing a temporary plugging agent: mixing a temporary plugging agent with performance to be detected, instant guanidine gum and a filler, uniformly mixing, dividing into two parts, firstly putting the first part of temporary plugging agent into a fracturing simulator, and putting the second part of temporary plugging agent for later use;
s3: and (3) pressure testing: closing a lower liquid outlet valve, controlling the booster pump to boost pressure by using a background control system, recording the displacement condition of the temporary plugging agent in the fracturing simulation device every time the pressure is increased by 1Mpa, and judging the pressure bearing capacity of the temporary plugging agent according to the increased pressure data and the recorded displacement condition data of the temporary plugging agent;
s4: and (3) temperature testing: after the pressure is tested, a first part of temporary plugging agent is taken out, a second part of temporary plugging agent is put into the fracturing simulation device, an electric heating belt is wrapped on the periphery of the fracturing simulation device, a liquid outlet valve is opened through a background control system, the background control system controls the electric heating belt to gradually increase the temperature, the flow of liquid flowing out of the lower portion of the fracturing simulation device is tested through a flow sensor, the heating temperature is monitored in a real-time background mode, and therefore the degradation capability of the temporary plugging agent is judged.
2. The experimental method for plugging performance of the temporary plugging agent for fracturing as claimed in claim 1, wherein the fracturing simulator is a visible transparent pipeline, the inside of the fracturing simulator simulates the fracture condition of a real environment, and the outside of the fracturing simulator is provided with scale lines.
3. The experimental method for plugging performance of the temporary plugging agent for fracturing as claimed in claim 1, wherein the pressure sensor, the booster pump, the liquid outlet valve, the flow sensor and the electric heating tape are connected with a background control system.
4. The experimental method for the plugging performance of the temporary plugging agent for fracturing as claimed in claim 1, wherein said filler is one of vegetable starch, mica powder and talc.
5. The experimental method for plugging performance of the temporary plugging agent for fracturing as claimed in claim 1, wherein the fracturing simulator is made of high temperature resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188498.9A CN112796700A (en) | 2021-02-19 | 2021-02-19 | Experimental method for plugging performance of temporary plugging agent for fracturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110188498.9A CN112796700A (en) | 2021-02-19 | 2021-02-19 | Experimental method for plugging performance of temporary plugging agent for fracturing |
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| CN112796700A true CN112796700A (en) | 2021-05-14 |
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| CN202110188498.9A Pending CN112796700A (en) | 2021-02-19 | 2021-02-19 | Experimental method for plugging performance of temporary plugging agent for fracturing |
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Cited By (2)
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| CN114088316A (en) * | 2021-11-23 | 2022-02-25 | 西南石油大学 | Fracturing ball sealing performance testing device and dynamic operation pressure regulating and controlling method |
| CN115452344A (en) * | 2022-09-14 | 2022-12-09 | 广东省水利水电科学研究院 | Hand hole plugging quality detection structure and detection method |
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Application publication date: 20210514 |