CN111911135A - Dynamic description method for high water consumption strip of water-drive reservoir - Google Patents
Dynamic description method for high water consumption strip of water-drive reservoir Download PDFInfo
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- CN111911135A CN111911135A CN202010703892.7A CN202010703892A CN111911135A CN 111911135 A CN111911135 A CN 111911135A CN 202010703892 A CN202010703892 A CN 202010703892A CN 111911135 A CN111911135 A CN 111911135A
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- 238000004088 simulation Methods 0.000 claims abstract description 8
- 239000012071 phase Substances 0.000 claims description 43
- 230000000704 physical effect Effects 0.000 claims description 9
- 239000008346 aqueous phase Substances 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
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- 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
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The invention relates to the technical field of oil and gas field development, and particularly discloses a dynamic description method for a high water consumption strip of a water-drive reservoir. Which comprises the following steps: step 1, collecting and organizing geological data and development data of a target oil reservoir, and constructing a streamline simulation model of the target oil reservoir by using a streamline simulator; step 2, calling a streamline simulator, carrying out streamline numerical simulation of water drive development of the target oil reservoir, and obtaining streamline distribution results of the target oil reservoir at different moments; step 3, extracting characteristic parameter values of each streamline at different moments, and calculating the pseudo-water content of each streamline; and 4, identifying the position and the range of the streamline flow-through area with the water content of more than 98% at different moments, and outputting the dynamic description result of the high water consumption strip of the target oil reservoir. According to the method, the position and the range of the region where the streamline with the water content of more than 98% flows at different moments are quickly identified, the dynamic description of the development position, the shape and the range of each high water consumption strip of the water-drive reservoir is more accurately realized, and guidance is provided for the improvement and development effect of the water-drive reservoir.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to the technical field of water-drive reservoir high-water-consumption strips.
Background
The high water consumption strip is a communicated area which is formed in the long-term water flooding process, has low oil saturation, has a displacement multiple far greater than that of other areas and does not have the potential of continuous water injection and oil displacement. The method has the advantages that the oil field development enters the later stage of extra-high water content, the influence of reservoir heterogeneity is caused, high water consumption strips are generally developed, low-efficiency ineffective circulation of a large amount of injected water is caused, the water flooding unbalance degree is enhanced, the water flooding development effect is poor, accurate identification and description of the high water consumption strips are the premise of effective treatment of the high water consumption strips, and meanwhile, the method has important significance for improving the development effect of the extra-high water content oil reservoir and reducing the production cost.
At present, few researches are conducted on the description of the high water consumption strip, a water absorption profile method and a pressure drop curve method are mainly used for judging whether the high water consumption strip exists or not, the tracer testing method and the interference well testing method excessively emphasize the influence of the absolute permeability of a reservoir stratum, the obtained result only reflects the average property of the reservoir stratum but not the parameter of the high water consumption strip, and the methods are long in testing time and high in explanation difficulty. The specificity of the high water consumption strip cannot be completely considered in the above description methods of the high water consumption strip, and the description methods are often limited to qualitative analysis, and an effective description method for the high water consumption strip is lacked at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a dynamic description method for high water consumption strips of a water-drive reservoir, which realizes dynamic description of high water consumption strip development of the water-drive reservoir based on position and range identification of streamline flowing areas with water content of more than 98% at different moments.
In order to achieve the purpose, the invention adopts the following technical scheme: a dynamic description method for a high water consumption strip of a water-drive reservoir comprises the following steps:
step 1, collecting and organizing geological data and development data of a target oil reservoir, and constructing a streamline simulation model of the target oil reservoir by using a streamline simulator;
step 2, calling a streamline simulator, carrying out streamline numerical simulation of water drive development of the target oil reservoir, and obtaining streamline distribution results of the target oil reservoir at different moments;
step 3, extracting characteristic parameter values of each streamline at different moments, and calculating the pseudo-water content of each streamline;
and 4, identifying the position and the range of the streamline flow-through area with the water content of more than 98% at different moments, and outputting the dynamic description result of the high water consumption strip of the target oil reservoir.
Preferably, in the step 1,
the geological data comprises reservoir structure parameters, reservoir physical property parameters and fluid physical property parameters; the reservoir structure parameters comprise top structure and fault data; the physical parameters of the reservoir comprise formation pressure, formation temperature, oil layer thickness, oil saturation, permeability, porosity and pore compression coefficient; the fluid physical property parameters comprise oil phase viscosity, oil phase density, water phase viscosity, water phase density, relative permeability curve and capillary pressure curve;
the development data comprises wellhead coordinates, well tracks, perforation positions and working systems of the water injection well and the production well.
Preferably, in step 1, the streamline simulator comprises, but is not limited to, a FrontSim streamline simulator.
Preferably, the step 3 specifically comprises the following steps:
301, extracting characteristic parameter values of each streamline at different moments, wherein the characteristic parameter values comprise the number of nodes through which the ith streamline flows, the position data of the streamline at the jth node on the ith streamline, and oil phase saturation data Soi,jWater phase saturation data Swi,jOil phase flow rate data voi,jWater phase flow rate data vwi,j；
Step 302, calculating the average flow rate of the oil phase and the average flow rate of the water phase flowing through each node on each flow line according to the characteristic parameter values of each flow line extracted at different moments, and respectively adopting the formulas (1) and (2):
in formulas (1) and (2):
the average flow rate of the aqueous phase on the ith flow line;
average flow rate of oil phase on the ith flow line; v. ofwi,jThe flow rate of the water phase at the j node on the extracted ith flow line; v. ofoi,jThe oil phase flow rate at the j node on the extracted ith flow line; n isiThe number of extracted nodes flowing through the ith streamline is obtained;
step 303, calculating the pseudo water content of each streamline, and adopting a formula (3):
in equation (3): f. ofwiThe pseudo water content of each node flowing through the ith flow line is obtained; rhowIs the density of the aqueous phase; rhooIs the oil phase density.
Preferably, the step 4 specifically includes the following steps:
step 401, identifying the position and the range of the streamline flow area with the simulated water content of more than 98% at different moments to determine the development position, the shape and the range of each high water consumption strip of the target oil reservoir at the moment;
step 402, according to characteristic parameter values of each streamline extracted at different moments, drawing and outputting position and range change graphs of streamline flowing areas with the simulated water content of more than 98% at different moments, namely dynamic description results of each high water consumption strip of the target oil reservoir at different moments.
The technical scheme of the invention has the following beneficial effects: the method disclosed by the invention can be used for more accurately realizing dynamic description of the development position, shape and range of each high water consumption strip of the water-drive reservoir by quickly identifying the position and range of the region through which the streamline with the water content ratio of more than 98% flows at different moments, and providing guidance for improving the development effect of the water-drive reservoir.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a dynamic description method of a high water consumption strip of a water-drive reservoir.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1, a dynamic description method for a high water consumption strip of a water-drive reservoir includes the following steps:
step 1, collecting and organizing geological data and development data of a target oil reservoir, and constructing a streamline simulation model of the target oil reservoir by using a streamline simulator.
The geological data comprises reservoir structure parameters, reservoir physical property parameters and fluid physical property parameters; the reservoir structure parameters comprise top structure and fault data; the physical parameters of the reservoir comprise formation pressure, formation temperature, oil layer thickness, oil saturation, permeability, porosity and pore compression coefficient; the fluid physical property parameters comprise oil phase viscosity, oil phase density, water phase viscosity, water phase density, relative permeability curve and capillary pressure curve; the development data comprises wellhead coordinates, well tracks, perforation positions and working systems of the water injection well and the production well; the streamline simulator includes, but is not limited to, a FrontSim streamline simulator.
And 2, calling a streamline simulator, carrying out streamline numerical simulation of water drive development of the target oil reservoir, and obtaining streamline distribution results of the target oil reservoir at different moments.
And 3, extracting characteristic parameter values of each streamline at different moments, and calculating the pseudo-water content of each streamline.
The step 3 specifically comprises the following steps:
301, extracting characteristic parameter values of each streamline at different moments, wherein the characteristic parameter values comprise the number of nodes through which the ith streamline flows, the position data of the streamline at the jth node on the ith streamline, and oil phase saturation data Soi,jWater phase saturation data Swi,jOil phase flow rate data voi,jWater phase flow rate data vwi,j；
Step 302, calculating the average flow rate of the oil phase and the average flow rate of the water phase flowing through each node on each flow line according to the characteristic parameter values of each flow line extracted at different moments, and respectively adopting the following formulas:
in the formula:
the average flow rate of the aqueous phase on the ith flow line;
average flow rate of oil phase on the ith flow line; v. ofwi,jThe flow rate of the water phase at the j node on the extracted ith flow line; v. ofoi,jThe oil phase flow rate at the j node on the extracted ith flow line; n isiThe number of extracted nodes flowing through the ith streamline is obtained;
step 303, calculating the pseudo water content of each streamline by adopting the following formula:
in the formula: f. ofwiThe pseudo water content of each node flowing through the ith flow line is obtained; rhowIs the density of the aqueous phase; rhooIs the oil phase density. RhowIs the density of the aqueous phase, poGiven for the oil phase density for the modeling in step 1.
And 4, identifying the position and the range of the streamline flow-through area with the water content of more than 98% at different moments, and outputting the dynamic description result of the high water consumption strip of the target oil reservoir.
The step 4 comprises the following steps:
step 401, identifying the position and the range of the streamline flow area with the simulated water content of more than 98% at different moments to determine the development position, the shape and the range of each high water consumption strip of the target oil reservoir at the moment;
step 402, according to characteristic parameter values of each streamline extracted at different moments, drawing and outputting position and range change graphs of streamline flowing areas with the simulated water content of more than 98% at different moments, namely dynamic description results of each high water consumption strip of the target oil reservoir at different moments.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (4)
1. A dynamic description method for a high water consumption strip of a water drive reservoir is characterized by comprising the following steps:
step 1, collecting and organizing geological data and development data of a target oil reservoir, and constructing a streamline simulation model of the target oil reservoir by using a streamline simulator;
step 2, calling a streamline simulator, carrying out streamline numerical simulation of water drive development of the target oil reservoir, and obtaining streamline distribution results of the target oil reservoir at different moments;
step 3, extracting characteristic parameter values of each streamline at different moments, and calculating the pseudo-water content of each streamline;
and 4, identifying the position and the range of the streamline flow-through area with the water content of more than 98% at different moments, and outputting the dynamic description result of the high water consumption strip of the target oil reservoir.
2. The dynamic description method for the high water consumption strip of the water-drive reservoir according to claim 1, wherein in the step 1,
the geological data comprises reservoir structure parameters, reservoir physical property parameters and fluid physical property parameters; the reservoir structure parameters comprise top structure and fault data; the physical parameters of the reservoir comprise formation pressure, formation temperature, oil layer thickness, oil saturation, permeability, porosity and pore compression coefficient; the fluid physical property parameters comprise oil phase viscosity, oil phase density, water phase viscosity, water phase density, relative permeability curve and capillary pressure curve;
the development data comprises wellhead coordinates, well tracks, perforation positions and working systems of the water injection well and the production well.
3. The dynamic description method for the high water consumption strip of the water-drive reservoir according to claim 2, wherein the step 3 specifically comprises the following steps:
301, extracting characteristic parameter values of each streamline at different moments, wherein the characteristic parameter values comprise the number of nodes through which the ith streamline flows, the position data of the streamline at the jth node on the ith streamline, and oil phase saturation data Soi,jWater phase saturation data Swi,jOil phase flow rate data voi,jWater phase flow rate data vwi,j；
Step 302, calculating the average flow rate of the oil phase and the average flow rate of the water phase flowing through each node on each flow line according to the characteristic parameter values of each flow line extracted at different moments, and respectively adopting the formulas (1) and (2):
in formulas (1) and (2):
the average flow rate of the aqueous phase on the ith flow line;
average flow rate of oil phase on the ith flow line; v. ofwi,jThe flow rate of the water phase at the j node on the extracted ith flow line; v. ofoi,jThe oil phase flow rate at the j node on the extracted ith flow line; n isiThe number of extracted nodes flowing through the ith streamline is obtained;
step 303, calculating the pseudo water content of each streamline, and adopting a formula (3):
in equation (3): f. ofwiThe pseudo water content of each node flowing through the ith flow line is obtained; rhowIs the density of the aqueous phase; rhooIs the oil phase density.
4. The dynamic description method for the high water consumption strip of the water-drive reservoir according to claim 3, wherein the step 4 specifically comprises the following steps:
step 401, identifying the position and the range of the streamline flow area with the simulated water content of more than 98% at different moments to determine the development position, the shape and the range of each high water consumption strip of the target oil reservoir at the moment;
step 402, according to characteristic parameter values of each streamline extracted at different moments, drawing and outputting position and range change graphs of streamline flowing areas with the simulated water content of more than 98% at different moments, namely dynamic description results of each high water consumption strip of the target oil reservoir at different moments.
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Cited By (2)
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| CN114810006A (en) * | 2021-01-27 | 2022-07-29 | 中国石油化工股份有限公司 | Potential evaluation method for regulating and controlling high-water-consumption zone by separate-layer water injection after heterogeneous flooding |
| CN114810006B (en) * | 2021-01-27 | 2024-05-31 | 中国石油化工股份有限公司 | Heterogeneous flooding post-treatment separate layer water injection regulation and control high water consumption layer potential evaluation method |
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| CN114810006B (en) * | 2021-01-27 | 2024-05-31 | 中国石油化工股份有限公司 | Heterogeneous flooding post-treatment separate layer water injection regulation and control high water consumption layer potential evaluation method |
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