CN204827402U - Experimental model of displacement of reservoir oil mechanism is transferred in research water drive sandstone oil reservoir deep - Google Patents
Experimental model of displacement of reservoir oil mechanism is transferred in research water drive sandstone oil reservoir deep Download PDFInfo
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- CN204827402U CN204827402U CN201520553291.7U CN201520553291U CN204827402U CN 204827402 U CN204827402 U CN 204827402U CN 201520553291 U CN201520553291 U CN 201520553291U CN 204827402 U CN204827402 U CN 204827402U
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Abstract
The utility model provides an experimental model of displacement of reservoir oil mechanism is transferred in research water drive sandstone oil reservoir deep, include: the high hole rock core model of oil reservoir heterogeneous body formation condition three -layer heterogeneous body is used for simulating, the high hole rock core model top -down of three -layer heterogeneous body oozes the layer for hypotonic layer in, in proper order and the height oozes the layer, the electrode monitoring point has been put to each layer equipartition of the high hole rock core model of three -layer heterogeneous body, and wherein the pressure tap has still been arranged on hypotonic layer. Adopt the utility model discloses an experimental model can be fine research water drive sandstone oil reservoir deep transfer displacement of reservoir oil mechanism.
Description
Technical field
The utility model relates to research deep profile correction mechanism of oil displacement technical field, particularly a kind of experimental model studying water drive sandstone reservoirs deep profile correction mechanism of oil displacement.
Background technology
In reservoir waterflooding process, due to the non-homogeneity of oil reservoir, cause injection water along high permeability zone band or duct channelling, advance by leaps and bounds, greatly reduce and inject the swept volume of water and the development effectiveness in oil field.For the problems referred to above, deep profile correction technology can be adopted to solve.Deep profile correction technology is by injecting heavy dose of shake gels to oil reservoir, reduces high permeability formation permeability, changes the flow direction of subsequent fluid, expands the swept volume injecting water, improves oil recovery factor; This technology is by reducing oil and water mobility ratio simultaneously, and improving ecology oil mobility ratio, improves sweep efficiency.But when reality carries out the deep profile correction displacement of reservoir oil to oil reservoir, due to unclear to deep profile correction mechanism of oil displacement understanding, can produce transfer drive well group, the block situation difference that takes effect is large, between well, flow field, underground monitoring difficulty is large, and deep rock tunneling is difficult to the problems such as judgement.
Utility model content
The utility model embodiment provides a kind of experimental model studying water drive sandstone reservoirs deep profile correction mechanism of oil displacement, can see clearly deep profile correction mechanism of oil displacement better.Comprise:
For three layers of heterogeneous body height hole core model of simulating oil deposit inhomogeneous formation condition;
Described three layers of heterogeneous body height hole core model are followed successively by low-permeability layer, middle infiltration layer and high permeability formation from top to bottom;
Every one deck of described three layers of heterogeneous body height hole core model is uniform is equipped with electrode monitoring point, and wherein low-permeability layer is also furnished with pressure tap.
In one embodiment, length and the width of every one deck of described three layers of heterogeneous body height hole core model are 30 centimetres, and the thickness sum of three layers is 4.5 centimetres.
In one embodiment, described electrode monitoring point is 38.
In one embodiment, described pressure tap is 6.
In one embodiment, described on pressure tap setting pressure sensor.
In one embodiment, described three layers of heterogeneous body height hole core model adopt cementing artificial core.
In one embodiment, described three layers of heterogeneous body height hole core model are sealed by epoxy gluing.
In the utility model embodiment, a kind of three layers of heterogeneous body height hole core model are proposed, for simulating oil deposit inhomogeneous formation condition, in three layers of heterogeneous body height hole core model, arrange electrode monitoring point simultaneously, wherein low-permeability layer is also furnished with pressure tap, can by the change of resistivity of electrode monitoring point and the change of pressure tap pressure, determine the distribution situation of each permeable formation oil, water, and then determine the situation of change of oil saturation, determine the effect of the deep profile correction displacement of reservoir oil, disclose deep profile correction mechanism of oil displacement.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a application's part, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is a kind of experimental model floor map studying water drive sandstone reservoirs deep profile correction mechanism of oil displacement that the utility model embodiment provides;
Fig. 2 is a kind of deep profile correction strata pressure change curve that the utility model embodiment provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, the utility model is described in further details.At this, exemplary embodiment of the present utility model and illustrating for explaining the utility model, but not as to restriction of the present utility model.
It is existing when deep profile correction is carried out to oil reservoir, can produce transfer drive well group, the block situation difference that takes effect is large, between well, flow field, underground monitoring difficulty is large, and deep rock tunneling is difficult to the problems such as judgement, if deep profile correction mechanism of oil displacement can be seen clearly, then can solve above-mentioned produced problem.Based on this, the utility model proposes a kind of experimental model studying water drive sandstone reservoirs deep profile correction mechanism of oil displacement.
Fig. 1 is a kind of experimental model floor map studying water drive sandstone reservoirs deep profile correction mechanism of oil displacement that the utility model embodiment provides, and as shown in Figure 1, this experimental model comprises:
For three layers of heterogeneous body height hole core model of simulating oil deposit inhomogeneous formation condition;
Described three layers of heterogeneous body height hole core model are followed successively by low-permeability layer, middle infiltration layer and high permeability formation from top to bottom;
Every one deck of described three layers of heterogeneous body height hole core model is uniform is equipped with electrode monitoring point, and wherein low-permeability layer is also furnished with pressure tap.
During concrete enforcement, three layers of heterogeneous body (positive rhythm) high hole (high porosity) core model mainly make according to the heterogeneous reservoir formation condition of reality, namely actual heterogeneous reservoir stratum is simulated, it is of a size of 30cm × 30cm × 4.5cm, namely the length of every one deck and width are 30 centimetres, the thickness sum of three layers is 4.5 centimetres, forms a cuboid.This core model is cementing artificial core, and outside epoxy gluing, keep the sealing of cementing artificial core, prevent when carrying out injection water to this core model and injecting oil, injection water leaks outside with oil.
This core model is followed successively by low-permeability layer, middle infiltration layer and high permeability formation from top to bottom, and namely permeability raises gradually from top to bottom.Specifically as shown in table 1.
Table 1
Before experimental model pressing mold, adopt middle symmetry principle according to a note one and electrode monitoring point is arranged to the half of model, i.e. equal electrode insertion monitoring point on low-permeability layer, middle infiltration layer and high permeability formation respectively, the electrode monitoring point of inserting equidistantly distributes in the plane of every layer, and the middle part of each layer of position is inserted in electrode monitoring point.Arrange that the object of electrode monitoring point is the change of each layer of monitoring, each point resistivity, and then determine the distribution situation of each layer oil, water.Usually the matrix preserving oil-gas Layer is nonconducting, and water and crude oil are widely different in electrical, and crude oil resistivity approach infinity, in rock, the electrolyte concentration of water is larger, and resistance value is less.Therefore, electrically change according to rock core the situation of change just can determining oil saturation, also therefore determine deep profile correction oil displacement efficiency.Concrete, can arrange multiple electrode monitoring point, be provided with 38 monitoring points in the utility model, as shown in Figure 1,1-19 is electrode monitoring point, and each self-contained how many electrode monitoring points of concrete three permeable formations set according to actual requirement.
Before experimental model pressing mold, middle symmetry principle second half layout pressure tap to model is adopted, because pressure has conduction, so be furnished with 6 pressure taps on low-permeability layer equally according to a note one, under enter the change of pressure sensor monitoring pressure, in Fig. 1 1. to being 6. pressure tap.After at the utility model simulated formation temperature, water drive moisture content reaches 98%, metaideophone profile control agent is waited solidifying, then carries out monitoring pressure change in sequent water flooding to moisture content 100% process, calculates the parameters such as recovery ratio, thus sees clearly deep profile correction mechanism of oil displacement.
The utility model electrode monitoring point and pressure tap installation site as shown in table 2.
Table 2
| Electrode | Position | Measure layer position | Pressure tap | Position |
| Water injection well | 0，0 | ① | 0，0 | |
| Producing well | 30，30 | ② | 10，7.5 | |
| 1 | 2.5，3.5 | Upper and lower | ③ | 24，21.5 |
| 2 | 6，8 | Above, in | ④ | 15，5.5 |
| 3 | 9.5，11 | In, under | ⑤ | 25.5，5.5 |
| 4 | 13，14 | Upper and lower | ⑥ | 26，15.5 |
| 5 | 16.5，18.5 | Above, in | ||
| 6 | 20，22 | In, under | ||
| 7 | 24，25 | Upper and lower | ||
| 8 | 28，29 | Above, in | ||
| 9 | 2，11 | Upper and lower | ||
| 10 | 6.5，14 | Above, in | ||
| 11 | 10，18 | In, under | ||
| 12 | 13.5，21 | Upper and lower | ||
| 13 | 16.5，24.5 | Above, in | ||
| 14 | 20，28.5 | In, under | ||
| 15 | 3.5，19 | Upper and lower | ||
| 16 | 7.5，24 | Above, in | ||
| 17 | 12，28.5 | In, under | ||
| 18 | 3.5，23.5 | Upper and lower | ||
| 19 | 7.5，28.5 | In, under |
The process adopting this core model to carry out testing is as follows: as shown in Figure 1, connect 1., 2., the channel line of 3. three pressure taps simulation fan delta front deposition reservoirs, to connect 4., 5. 2 simulating riverway edge, 6. simulate thin layer sand to model edge.At room temperature, saturated formation water after vacuumizing process to core model, obtains the voids volume of core model; After saturation water, under simulated formation temperature 70 C condition, saturation simulation oil is carried out to model, calculate oil saturation; Separately being driven to moisture content 98% at 70 DEG C of Water Unders obtains waterflood recovery efficiency factor, collects the data such as oil saturation, pressure, oil production, injection water volume simultaneously; Inject the chemical agent be equipped with afterwards at this temperature, wait solidifying 3 days, then carry out sequent water flooding to the final parameter such as calculating pressure, recovery ratio of moisture content 100%.
As shown in Figure 2, wherein, P1 is monitoring point pressure 1. to pressure measured after carrying out water drive, deep profile correction and sequent water flooding; P2 is monitoring point pressure 2.; P3 is monitoring point pressure 3.; P4 is monitoring point pressure 4.; P5 is monitoring point pressure 5.; P6 is monitoring point pressure 6..As shown in Figure 2, in water drive process, pressure amplitude is little, and along with the increase that injection PV (chemical agent unit) counts after injecting chemical agent, injection pressure raises gradually, and reflection injectant advances to oil deposit deep part gradually.Enter the sequent water flooding stage, pressure drop is steady, and also reflection injection water continues to advance to oil deposit deep part further, thus discloses deep profile correction mechanism of oil displacement.
To sum up above-mentioned, the experimental model adopting the utility model to propose can simulate actual heterogeneous reservoir stratum, when running into the identical reservoir formation of the formation condition of simulating with this core model in the middle of reality, the data such as the voids volume that can record according to the utility model, oil saturation, pressure, oil production, injection water volume, reservoir formation for reality carries out deep profile correction provides Data support, thus after better understanding deep profile correction, inject the flow direction of water and remaining oil, improve the recovery ratio of crude oil.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model embodiment can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. study an experimental model for water drive sandstone reservoirs deep profile correction mechanism of oil displacement, it is characterized in that, comprising:
For three layers of heterogeneous body height hole core model of simulating oil deposit inhomogeneous formation condition;
Described three layers of heterogeneous body height hole core model are followed successively by low-permeability layer, middle infiltration layer and high permeability formation from top to bottom;
Every one deck of described three layers of heterogeneous body height hole core model is uniform is equipped with electrode monitoring point, and wherein low-permeability layer is also furnished with pressure tap.
2. the experimental model of research water drive sandstone reservoirs deep profile correction mechanism of oil displacement as claimed in claim 1, it is characterized in that, length and the width of every one deck of described three layers of heterogeneous body height hole core model are 30 centimetres, and the thickness sum of three layers is 4.5 centimetres.
3. the experimental model of research water drive sandstone reservoirs deep profile correction mechanism of oil displacement as claimed in claim 1, it is characterized in that, described electrode monitoring point is 38.
4. the experimental model of research water drive sandstone reservoirs deep profile correction mechanism of oil displacement as claimed in claim 1, it is characterized in that, described pressure tap is 6.
5. the experimental model of research water drive sandstone reservoirs deep profile correction mechanism of oil displacement as claimed in claim 1, is characterized in that, setting pressure sensor on described pressure tap.
6. the experimental model of the research water drive sandstone reservoirs deep profile correction mechanism of oil displacement as described in any one of claim 1 to 5, is characterized in that, described three layers of heterogeneous body height hole core model adopt cementing artificial core.
7. the experimental model of research water drive sandstone reservoirs deep profile correction mechanism of oil displacement as claimed in claim 6, it is characterized in that, described three layers of heterogeneous body height hole core model are sealed by epoxy gluing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105422079A (en) * | 2015-12-07 | 2016-03-23 | 中国石油大学(北京) | Dynamic visualization observing device for displacement experiment |
| CN106014366B (en) * | 2016-07-27 | 2018-09-04 | 东北石油大学 | A kind of indoor set and application method for simulating single-well injection-production |
| CN108548702A (en) * | 2018-03-10 | 2018-09-18 | 东北石油大学 | Matrix-high infiltration strip rock core prepares green body and rock core preparation method |
| CN111207981A (en) * | 2020-03-01 | 2020-05-29 | 东北石油大学 | Method for manufacturing three-layer heterogeneous flat plate electrode core |
| CN111207980A (en) * | 2020-03-01 | 2020-05-29 | 东北石油大学 | Method for manufacturing three-layer heterogeneous flat plate core pressure monitoring point |
| CN111706316A (en) * | 2020-05-13 | 2020-09-25 | 清华大学 | Multi-medium chip oil reservoir and manufacturing and application methods thereof |
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2015
- 2015-07-28 CN CN201520553291.7U patent/CN204827402U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422079A (en) * | 2015-12-07 | 2016-03-23 | 中国石油大学(北京) | Dynamic visualization observing device for displacement experiment |
| CN105422079B (en) * | 2015-12-07 | 2017-08-01 | 中国石油大学(北京) | Dynamic and visual observation device for displacement test |
| CN106014366B (en) * | 2016-07-27 | 2018-09-04 | 东北石油大学 | A kind of indoor set and application method for simulating single-well injection-production |
| CN108548702A (en) * | 2018-03-10 | 2018-09-18 | 东北石油大学 | Matrix-high infiltration strip rock core prepares green body and rock core preparation method |
| CN108548702B (en) * | 2018-03-10 | 2020-09-22 | 东北石油大学 | Preparation blank of matrix-hypertonic strip rock core and rock core preparation method |
| CN111207981A (en) * | 2020-03-01 | 2020-05-29 | 东北石油大学 | Method for manufacturing three-layer heterogeneous flat plate electrode core |
| CN111207980A (en) * | 2020-03-01 | 2020-05-29 | 东北石油大学 | Method for manufacturing three-layer heterogeneous flat plate core pressure monitoring point |
| CN111207981B (en) * | 2020-03-01 | 2022-09-02 | 东北石油大学 | Method for manufacturing three-layer heterogeneous flat plate electrode core |
| CN111706316A (en) * | 2020-05-13 | 2020-09-25 | 清华大学 | Multi-medium chip oil reservoir and manufacturing and application methods thereof |
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