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Method and device for estimating distribution area of remaining oil close to fault of oil well

A technology of distribution area and remaining oil, applied in calculation, complex mathematical operations, electrical digital data processing, etc., can solve problems such as long cycle and complicated research process, and achieve the effect of simple operation, clear goal, and practical engineering application value

Pending Publication Date: 2021-08-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the need to establish an accurate geological model and history matching technology in line with the actual block, the existing research process of the remaining oil distribution near the fault of the oil well in the ultra-high water-cut period of the fault-block reservoir is complicated and the cycle is long

Method used

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  • Method and device for estimating distribution area of remaining oil close to fault of oil well
  • Method and device for estimating distribution area of remaining oil close to fault of oil well
  • Method and device for estimating distribution area of remaining oil close to fault of oil well

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Effect test

Embodiment 1

[0048] Such as figure 1As shown, the methods for estimating the distribution area of ​​remaining oil near faults in oil wells in the ultra-high water-cut period of fault-block reservoirs in this application include:

[0049] S1, Carry out fine reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of fault block reservoirs in the target zone;

[0050] S2, based on the geological model, use the reservoir numerical simulation method to carry out the reservoir numerical simulation calculation;

[0051] S3, based on the numerical simulation calculation results of the reservoir, calculate the distribution area of ​​the remaining oil near the fault when the water cut of the oil well reaches the threshold value, and the oil well is an oil well in the ultra-high water cut period of the fault block reservoir;

[0052] S4, according to the geological model established in step S1 and t...

Embodiment 2

[0055] Such as Figure 2-3 As shown, the method for estimating the remaining oil distribution area near the fault of the oil well in this application includes steps S11-S4, and each step is described below.

[0056] S11. Carry out fine reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of fault block reservoirs in the target zone.

[0057] This step includes fine reservoir description for multiple fault blocks covered by the target zone, and statistical analysis of formation dip angle, permeability, oil-water viscosity ratio, edge water volume, daily liquid production, injection-production ratio, oil well location, and injection-production well spacing. According to the statistical results, a number of typical geological models that can represent the characteristics of fault block reservoirs in the target zone are established. The values ​​of the parameters in the model ...

Embodiment 3

[0080] Such as Figure 4 As shown, the application provides a device for estimating the distribution area of ​​remaining oil near faults in oil wells, including:

[0081] The first establishment unit 201 is used to carry out fine reservoir description for multiple fault blocks covered by the target zone, and establish multiple typical geological models representing the characteristics of fault block reservoirs in the target zone;

[0082] The calculation unit 202 is used to perform reservoir numerical simulation calculations based on the geological model and by means of reservoir numerical simulation;

[0083] The statistical unit 203 is used to calculate the distribution area of ​​the remaining oil near the fault when the water cut of the oil well reaches a threshold based on the calculation results of the numerical simulation of the reservoir, and the oil well is an oil well in the ultra-high water cut period of the fault block reservoir;

[0084] The second establishing un...

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Abstract

The invention provides a method and a device for estimating the distribution area of remaining oil close to a fault of an oil well. The method comprises the following steps: S1, carrying out the fine oil reservoir description of a plurality of fault blocks covered by a target zone, and building a plurality of typical geologic models representing the oil reservoir characteristics of the fault blocks of the target zone; S2, based on the geologic model, carrying out reservoir numerical simulation calculation by utilizing a reservoir numerical simulation means; S3, based on the numerical reservoir simulation calculation result, counting the remaining oil distribution area of the oil well close to the fault when the water content of the oil well reaches a threshold value, wherein the oil well is the fault block oil reservoir ultra-high water content stage oil well; and S4, according to the geologic model established in the step S1 and the remaining oil distribution area obtained in the step S3, establishing a remaining oil distribution area estimation model. The method and the device solve the problem of quantitative estimation of the residual oil distribution area close to the fault of the oil well in the ultrahigh water-cut period of the fault block oil reservoir; and the purpose of rapidly and quantitatively estimating the remaining oil distribution area of the oil well close to the fault in the ultrahigh water cut period of the fault block oil reservoir is achieved.

Description

technical field [0001] The invention belongs to the field of oil field development, and in particular relates to a method and a device for estimating the remaining oil distribution area near a fault in an oil well. Background technique [0002] Due to the complex geological conditions of fault-block reservoirs, it is difficult to adopt large-area regular well patterns in the development process, and low-injection and high-production well patterns are generally used. A large number of field development practices have verified that even in the super-high water-cut stage, structural high parts There is still a law of remaining oil enrichment. However, the scale of remaining oil enrichment at high positions has an important impact on the specific potential tapping measures. The existing research on remaining oil in high position oil wells relying on faults is mainly based on reservoir numerical simulation and qualitative analysis of specific blocks. [0003] Due to the need to ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/18G06F111/10G06F113/08
CPCG06F17/18G06F30/20G06F2111/10G06F2113/08
Inventor 张顺康刘炳官孙东升尤启东葛政俊罗钰涵唐湘明
Owner CHINA PETROLEUM & CHEM CORP
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