CN102183438A - Method for simulating shearing of polymer solution under oil reservoir condition and special equipment of method - Google Patents
Method for simulating shearing of polymer solution under oil reservoir condition and special equipment of method Download PDFInfo
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- CN102183438A CN102183438A CN 201110049954 CN201110049954A CN102183438A CN 102183438 A CN102183438 A CN 102183438A CN 201110049954 CN201110049954 CN 201110049954 CN 201110049954 A CN201110049954 A CN 201110049954A CN 102183438 A CN102183438 A CN 102183438A
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- polymer solution
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Abstract
The invention discloses a method for simulating shearing of polymer solution under an oil reservoir condition and a special equipment of the method. The equipment comprises a core holder and a shell with an upper cover; the bottom of the shell is communicated with the top of the core holder through a pipeline; a gas interface is formed on the upper cover; and a filtrate outlet is formed at the bottom of the core holder. By using the equipment, the polymer solution can be sheared at a well immediate vicinity place, a position away from an injection well at a distance of 30 to 50 meters and a position away from the injection well at a distance of 50 to 80 meters. By the method, the similarity of a core-shearing method is realized and the characteristic of quick shearing of a WARING agitator can be considered; therefore, the method is applicable to indoor simulation of the shearing of the polymer solution.
Description
Technical field
The present invention relates to the new method and the specialized equipment thereof of polymer solution shear under the simulating oil deposit condition.
Background technology
Polymer flooding has become raising recovery efficiency technique important in the oilfield development process, and wherein, polymer solution viscosity is that can impact polymer drive one of key factor that successful.In the polymkeric substance injection process, then the polymer solution viscosity difference is bigger for polymer solution oil reservoir of living in position difference, and the polymer solution viscosity of understanding under the reservoir condition is then most important for estimating the polymer flooding effect.At present, indoor is to shear the polymer solution viscosity that obtains under the actual reservoir condition by the simulation to polymer solution, the method of simulating polymer solution shear mainly contains two kinds: a kind of method is that rock core is sheared, this method is to utilize injection pump to make polymer solution in the intermediate receptacle by the core holding unit of simulation rock core is housed, thereby realizes the shearing to polymer solution.The equipment that this method needs mainly comprises injection pump, intermediate receptacle, parts such as core holding unit, can be sheared later solution property by simulating polymer solution to a certain extent, it is more loaded down with trivial details that but this method operates, and neither also do not allow on the economic time for large batch of laboratory experiment.Shear the deficiency of this method for solving rock core, the at present indoor WARING stirrer that generally utilizes is measured its viscosity, rheological after polymkeric substance is sheared again, the data of resistance coefficient and residual resistance factor, but, utilize the WARING stirrer to shear polymer solution and be actually pure mechanical shearing, can not truly reflect the actual conditions that are sheared when polymer solution enters the stratum.
Summary of the invention
The object of the present invention is to provide a kind of equipment of shearing polymer solution.
Equipment provided by the invention comprises a core holding unit and has the housing of loam cake that the bottom of described housing and the top of described core holding unit are connected by pipeline; Cover on described and offer a gas interface, the bottom of described core holding unit offers filtrate outlet.
Further, for the ease of the injection of solution, on described housing sidewall, offer a solution inlet.
Further, be provided with piston in the described housing above the above-mentioned solution inlet.
Above-mentioned loam cake preferably is threaded with the upper end of described housing.
Above-mentioned housing can be cylindrical.
Another object of the present invention is to provide a kind of method of utilizing the said equipment to shear polymer solution.
Method provided by the invention comprises the steps:
1) described polymer solution is injected in the described housing;
2) gases at high pressure are fed gas from described gas interface toward described housing, realize shearing thereby the described polymer solution of described gas-powered enters described core holding unit;
3) collect the polymer solution of described shearing from described filtrate outlet.
Wherein, in the step 1), polymer solution can connect housing and described core holding unit with described pipeline earlier before injecting housing, also can carry out after polymer solution injects housing being connected of housing and core holding unit.
In the step 1), described polymer solution injects in the described housing by described solution inlet.
Step 2) in, thereby described gas drives described polymer solution and enters described core holding unit by oppressing described piston.Step 2) in, the pressure of described gas in described housing is 1.2-2.5MPa.
Experimental results show that: utilize equipment that embodiment 1 provides can be with polymer solution successively in the immediate vicinity of wellbore, apart from injecting well 30-50 rice and shear apart from injecting well 50-80 rice, be that the polymkeric substance SNF3640D solution of 26mPa.s cuts into 20mPa.s, 16.8mPa.s and 15mPa.s successively with immediate vicinity of wellbore viscosity.
Use the equipment of indoor quick simulating polymer solution shear provided by the invention to compare with two kinds of methods in the background technology, promptly realized the similarity of rock core cutting method, taken into account the characteristics of WARING stirrer THE ADIABATIC SHEAR IN again, be fit to very much the lab simulation polymer solution shear and use.
Description of drawings
Fig. 1 is a shearing equipment synoptic diagram provided by the invention.
Embodiment
The invention will be further described below in conjunction with specific embodiment, but the present invention is not limited to following examples.
Among the following embodiment, if no special instructions, be conventional method.
Embodiment 1, shearing equipment
As shown in Figure 1, the equipment of polymer solution shear provided by the invention comprises 9 and core holding units 7 of a housing (being the high pressure sample pond).The top that the mouth of pipe 10, core holding unit 7 are offered in housing 9 bottoms offers the mouth of pipe 11, is connected by the pipeline 6 that is plugged in the mouth of pipe 10 and the mouth of pipe 11 between housing 9 and the core holding unit 7.
Housing 9 is columniform, has loam cake 2.Wherein loam cake 2 is to be threaded with the upper end of housing 9, can guarantee sealing effectiveness.On loam cake 2, offer a gas interface 1, when concrete use equipment of the present invention, needed controllable pressure source such as the high-pressure nitrogen bottle of this gas interface with the outside is connected feeding nitrogen in the past then housing.Offer solution inlet 5 on the sidewall of housing 9, with injection of polymer solution 3 in the convenient past housing 1.One piston 4 is housed in the housing 9 above solution inlet 5, and after nitrogen entered housing 9 from gas interface 1, driven plunger 9 pressed down polymer solution 3 by the simulation rock core in the core holding unit 7.
Core holding unit 7 belong to prior art (TY-ZC type core holding unit, specification: 25*25-300), the rubber sleeve clamping that it is inner the simulation rock core.According to the reservoir condition and the suitable simulation rock core of geologic feature compacting in oil field, the simulation rock core parameter that present embodiment provides is: diameter: 2.5cm, height: 7cm, permeability: 1500mD, factor of porosity 30%, simulation rock core adopt the compacting of 80-100 order silica sand, cementing matter gluing.The bottom of core holding unit 7 has filtrate outlet 8.But the cavity injecting gas between core holding unit 7 sidewalls and the rubber sleeve so that the simulation rock core is added confined pressure, does not flow along the rock core outer wall to guarantee polymer solution.It all is pressure-resistant materials that closing in the equipment that invention provides advised parts, can withstand voltage 10MPa.
Embodiment 2: simulating polymer solution is in the shearing of immediate vicinity of wellbore
(1) at first will simulate rock core (diameter: 2.5cm, length: 7cm, permeability: 1500md, factor of porosity: 30%) pack in the core holding unit 7, add confined pressure 2.6MPa;
(2) by solution inlet 5 injection of polymer SNF3640D solution 3 about 300ml in the high pressure sample pond, the key property of polymkeric substance SNF3640D solution is as follows: it is 2,200 ten thousand-2,400 ten thousand common hydro-polyacrylamide that polymkeric substance SNF3640D belongs to molecular weight; Join polywater and adopt Simulated Water, Simulated Water salinity 3000mg/L, Ca
2++Mg
2+Content 50mg/L; The polymer solution compound concentration is 1000mg/L, and shearing preceding is 26mPa.s through measuring viscosity.After treating that above-mentioned polymer solution adds, close the solution inlet;
(3) utilize pipeline 6 that the high pressure sample pond is connected with core holding unit 7;
(4) controllable pressure source (high-pressure nitrogen bottle) linked to each other with high pressure nitrogen interface 1, logical nitrogen pressure, controlled pressure is about 2.5MPa, and driven plunger 4 makes polymer solution 3 by the simulation rock core in the core holding unit 7;
(5) 8 polymer solutions that reclaim after rock core is sheared at the filtrate outlet place.After treating that filtrate collection finishes, at first use hydro-extractor centrifugal, 10000 rev/mins of centrifugal speeds utilize Brookfield viscometer to measure polymer solution viscosity afterwards, and measurement result shows that the polymer solution viscosity value after shearing is 20mPa.s.
Embodiment 3: simulating polymer solution is apart from the shearing of injecting well 30-50 rice
(1) at first will simulate rock core (diameter: 2.5cm, length: 7cm, permeability: 1500md, factor of porosity: 30%) pack in the core holding unit 7, add confined pressure 2.0MPa;
(2) inject in the high pressure sample pond through the about 300ml of polymer solution after embodiment 2 shearings by solution inlet 5, initial viscosity is 20mPa.s.After treating that above-mentioned polymer solution adds, close the solution inlet;
(3) utilize pipeline 6 that the high pressure sample pond is connected with core holding unit 7;
(4) controllable pressure source (high-pressure nitrogen bottle) linked to each other with high pressure nitrogen interface 1, logical nitrogen pressure, controlled pressure is about 1.8MPa, and driven plunger 4 makes polymer solution by simulating rock core;
(5) 8 polymer solutions that reclaim after rock core is sheared at the filtrate outlet place.After treating that filtrate collection finishes, at first use hydro-extractor centrifugal, 10000 rev/mins of centrifugal speeds utilize Brookfield viscometer to measure polymer solution viscosity afterwards, and measurement result shows that the polymer solution viscosity value after shearing is 16.8mPa.s.
Embodiment 4: simulating polymer solution is apart from the shearing of injecting well 50-80 rice
(1) at first will simulate rock core (diameter: 2.5cm, length: 7cm, permeability: 1500md, factor of porosity: 30%) pack in the core holding unit 7, add confined pressure 1.5MPa;
(2) inject in the high pressure sample pond through the about 300ml of polymer solution after embodiment 3 shearings by solution inlet 5, initial viscosity is 16.8mPa.s.After treating that above-mentioned polymer solution adds, close the solution inlet;
(3) utilize pipeline 6 that the high pressure sample pond is connected with core holding unit 7;
(4) controllable pressure source (high-pressure nitrogen bottle) linked to each other with high pressure nitrogen interface 1, logical nitrogen pressure, controlled pressure is about 1.2MPa, and driven plunger 4 makes polymer solution by simulating rock core;
(5) 8 polymer solutions that reclaim after rock core is sheared at the filtrate outlet place.After treating that filtrate collection finishes, at first use hydro-extractor centrifugal, 10000 rev/mins of centrifugal speeds utilize Brookfield viscometer to measure polymer solution viscosity afterwards, and measurement result shows that the polymer solution viscosity value after shearing is 15mPa.s.
Claims (10)
1. the equipment of Jian Qieing is characterized in that: comprise a core holding unit and have the housing of loam cake, the bottom of described housing and the top of described core holding unit are connected by pipeline; Cover on described and offer a gas interface, the bottom of described core holding unit offers filtrate outlet.
2. equipment as claimed in claim 1 is characterized in that: offer a solution inlet on the described housing sidewall.
3. equipment as claimed in claim 2 is characterized in that: be provided with piston in the described housing of described solution inlet top.
4. the equipment described in claim 1-3, it is characterized in that: described loam cake is threaded with the upper end of described housing.
5. the equipment described in claim 1-3, it is characterized in that: described housing is cylindrical.
6. the equipment described in claim 4, it is characterized in that: described housing is cylindrical.
7. a method of utilizing arbitrary described equipment among the claim 1-6 to shear polymer solution comprises the steps:
1) described polymer solution is injected in the described housing;
2) gases at high pressure are fed gas from described gas interface toward described housing, realize shearing thereby the described polymer solution of described gas-powered enters described core holding unit;
3) collect the polymer solution of described shearing from described filtrate outlet.
8. method as claimed in claim 7 is characterized in that: in the step 1), described polymer solution injects in the described housing by described solution inlet.
9. as claim 7 or 8 described methods, it is characterized in that: step 2) in, thereby described gas drives described polymer solution and enters described core holding unit by oppressing described piston.
10. as arbitrary described method among the claim 7-9, it is characterized in that: step 2) in, the pressure of described gas in described housing is 1.2-2.5MPa.
Priority Applications (1)
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| CN 201110049954 CN102183438A (en) | 2011-03-02 | 2011-03-02 | Method for simulating shearing of polymer solution under oil reservoir condition and special equipment of method |
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| CN 201110049954 CN102183438A (en) | 2011-03-02 | 2011-03-02 | Method for simulating shearing of polymer solution under oil reservoir condition and special equipment of method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564900A (en) * | 2012-01-18 | 2012-07-11 | 东北石油大学 | Simulation test method for seepage process of polymer solution at different positions of stratum |
| CN103728439A (en) * | 2014-01-17 | 2014-04-16 | 中国石油大学(华东) | Shear history simulation experiment device and method for non-Newtonian crude oil |
| CN104777076A (en) * | 2015-04-20 | 2015-07-15 | 西南石油大学 | Secondary shear experimental method for measuring performance parameters of oil displacing polymer solutions |
| CN104792659A (en) * | 2015-04-20 | 2015-07-22 | 西南石油大学 | Two-stage shearing method for testing property parameter of polymer solution for expelling oil |
| CN110984932A (en) * | 2019-11-20 | 2020-04-10 | 中国海洋石油集团有限公司 | Profile control agent injection device |
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| CN202031558U (en) * | 2011-03-02 | 2011-11-09 | 中国海洋石油总公司 | Device simulating shear of polymer solution |
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| SU868472A1 (en) * | 1980-01-03 | 1981-09-30 | Институт Механики Полимеров Ан Латвсср | Rotary elastoviscosimeter measuring unit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564900A (en) * | 2012-01-18 | 2012-07-11 | 东北石油大学 | Simulation test method for seepage process of polymer solution at different positions of stratum |
| CN102564900B (en) * | 2012-01-18 | 2013-11-20 | 东北石油大学 | Simulation test method for seepage process of polymer solution at different positions of stratum |
| CN103728439A (en) * | 2014-01-17 | 2014-04-16 | 中国石油大学(华东) | Shear history simulation experiment device and method for non-Newtonian crude oil |
| CN104777076A (en) * | 2015-04-20 | 2015-07-15 | 西南石油大学 | Secondary shear experimental method for measuring performance parameters of oil displacing polymer solutions |
| CN104792659A (en) * | 2015-04-20 | 2015-07-22 | 西南石油大学 | Two-stage shearing method for testing property parameter of polymer solution for expelling oil |
| CN104792659B (en) * | 2015-04-20 | 2018-01-12 | 西南石油大学 | For determining the secondary shear method of Polymer Used For Oil Displacement solution property parameter |
| CN104777076B (en) * | 2015-04-20 | 2018-01-12 | 西南石油大学 | For determining the secondary shear experimental method of Polymer Used For Oil Displacement solution property parameter |
| CN110984932A (en) * | 2019-11-20 | 2020-04-10 | 中国海洋石油集团有限公司 | Profile control agent injection device |
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Application publication date: 20110914 |