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Method for judging whether fracturing is effective or not based on reservoir physical property data of oil well

A technology for reservoir physical properties and fracturing, which is used in earth-moving drilling, wellbore/well components, and production fluids. Effect

Inactive Publication Date: 2021-12-17
启东赢维数据信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is characterized by blindness and subjectivity, and the final fracturing effect is often unsatisfactory

Method used

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  • Method for judging whether fracturing is effective or not based on reservoir physical property data of oil well
  • Method for judging whether fracturing is effective or not based on reservoir physical property data of oil well
  • Method for judging whether fracturing is effective or not based on reservoir physical property data of oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: For the fracturing basic data of 50 oil wells, a fast discriminant model for fracturing is established based on the support vector machine algorithm, and the modeling results are shown in Table 3.

[0031] Table 3 Modeling results

[0032]

[0033] It can be seen from Table 3 that based on the physical property data of the oil well reservoir, the rapid discrimination model for whether the fracturing is effective or not has a relatively high modeling accuracy.

Embodiment 2

[0034] Example 2: For the fracturing basic data of 50 oil wells, the fast discriminant model of whether the fracturing is effective based on the support vector machine algorithm, the internal cross-validation results of the leave-one-out method are shown in Table 4.

[0035] Table 4 Leave-one-out internal cross-validation results

[0036]

[0037] It can be seen from Table 4 that based on the physical property data of oil well reservoirs, the fast discriminant model of whether the fracturing is effective or not has a relatively high accuracy rate of internal cross-validation of the leave-one-out method.

Embodiment 3

[0038] Example 3: For 3 new oil wells, the basic data, intermediate data and forecast results are shown in Table 5.

[0039] Table 5 Prediction results

[0040] Deep oil layer layers thickness Porosity Permeability Mud content water saturation P1 P2 P3 P4 P5 P6 Does fracking work? 3272.05 2 5.40 11.10 10.10 20.00 82.00 0.04 0.30 1.60 0.05 -0.03 0.81 yes 3065.25 1 6.50 12.98 9.32 10.87 54.55 -0.84 -0.31 -0.31 0.28 -0.37 0.31 yes 3934.7 1 15.40 9.70 3.90 9.20 66.60 0.26 -1.18 -0.93 0.94 -1.54 -0.34 no

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Abstract

The implementation of a fracturing measure becomes a common yield increasing measure for high-water-content later-stage oil field development and exploitation, and on-site selection of a fracturing construction well before fracturing also depends on an empirical method. The method has the characteristics of blindness and subjectivity, and the final fracturing effect is often not satisfactory. Along with the proposal of an oil field digitization strategy of a petroleum system, oil field production pays more and more attention to collection and accumulation of data. A large amount of production data are also accumulated in oil field fracturing production, the data are actually a set of information related to fracturing production activities, and when the data are accumulated to a certain degree, the data inevitably contain available rules. According to the patent, a model for judging whether fracturing is effective or not is established by using a support vector machine data mining algorithm on the basis of oil field reservoir physical property factors such as oil layer mid-depth, thickness, porosity, permeability, shale content and water saturation. And furthermore, a new fracturing operation is expected to be predicted by utilizing the established model for judging whether fracturing is effective or not, the new fracturing operation is guided, the future production is predicted to lower the development risk, and the economic benefit of an enterprise is improved.

Description

technical field [0001] The invention relates to the technical field of oilfield fracturing, in particular to a method for judging whether fracturing is effective based on physical property data of oil well reservoirs. Background technique [0002] With the development and utilization of oil fields, many oil reservoirs have entered the high water cut period in the later stage of development. The implementation of fracturing measures has become a common production stimulation measure to deal with the development and production of high water-cut late oilfields. There are many factors affecting the fracturing effect, and there are four main factors, including reservoir physical properties, fluid physical properties, production testing and reservoir integrity. Among them, the reservoir physical properties include sandstone thickness, formation coefficient, effective thickness, reservoir porosity and reservoir permeability, etc. During the fracturing process, the factors that af...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B49/00
CPCE21B43/26E21B49/00E21B2200/20
Inventor 刘太昂朱峰刘太行周晶晶周央刘振昌刘婷婷刘远朱鲁阳吴治富
Owner 启东赢维数据信息科技有限公司
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