A Calculation Method of Water Plugging Agent Dosage for Hydraulic Fractures in Horizontal Wells

A technology of hydraulic fracture and calculation method, which is applied in the direction of calculation, design optimization/simulation, special data processing application, etc., and can solve problems such as the influence of fractures that are not considered

Active Publication Date: 2019-05-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

The inventive method is fast and simple to calculate the amount of water blocking agent, and has strong operability, but the method does not consider the influence of fractures, and is mainly suitable for water plugging of horizontal wells in heterogeneous reservoirs that have not undergone manual fracturing

Method used

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  • A Calculation Method of Water Plugging Agent Dosage for Hydraulic Fractures in Horizontal Wells
  • A Calculation Method of Water Plugging Agent Dosage for Hydraulic Fractures in Horizontal Wells
  • A Calculation Method of Water Plugging Agent Dosage for Hydraulic Fractures in Horizontal Wells

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Embodiment 1

[0051] A method for calculating the amount of plugging agent for hydraulic fractures in horizontal wells. The amount of plugging agent required for plugging the hydraulic fractures at the toe of the horizontal wellbore section of Well XX in Changqing Oilfield is calculated, including the steps:

[0052] (1) Design equivalent calculation model

[0053] The single-stage complex fracture network formed after hydraulic fracturing of a horizontal well is simplified into an equivalent calculation model composed of a single macroscopic fracture 5 and a high-permeability matrix 6; the macroscopic fractures 5 penetrate the high-permeability matrix 6 from the middle; , Simplify the main fracture 1 in the single-stage complex fracture network formed after hydraulic fracturing into a single macroscopic fracture 5, and simplify the branch fractures and micro-fractures 3 formed after hydraulic fracturing into a high permeability matrix 6;

[0054] (2) Determine the physical parameters of the equiv...

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Abstract

The invention provides a method for calculating the dosage of water plugging agent for hydraulic fractures in horizontal wells, which comprises the following steps: (1) designing an equivalent calculation model, simplifying a single section complex fracture network formed by hydraulic fracturing of the horizontal wells into an equivalent calculation model composed of a single macrofracture and a high permeability matrix; the macrofracture penetrating the high permeability matrix from the middle; (2) determining the physical parameters of the equivalent calculation model; (3) calculating the filling volume of plugging agent for single section complex joint net; (4) calculation of a total dosage of plugging agent. The calculation method of the invention can realize the quantitative calculation of the required plugging agent dosage, fully considers the plugging agent filtration loss and the filling effect of the plugging agent on the fracture, is accurate and simple and easy to operate, avoids the cost caused by the general injection of the plugging agent in large dosage, ensures the effective plugging of the plugging agent on the fracture, and improves the oil production quality of the oil well.

Description

Technical field [0001] The invention relates to a method for calculating the amount of water plugging agent for hydraulic fractures of horizontal wells, and belongs to the technical field of increasing production in the development process of oil fields. Background technique [0002] The chemical water plugging of horizontal wells in low permeability reservoirs is mainly based on the methods and experience of water plugging in loose sandstone reservoirs. At present, the most widely used horizontal well water shutoff agents are still gel type plugging agents and granular type plugging agents. The plugging agent injection process design is also calculated by experience. Through the implementation of mines in recent years, some results and experience have been achieved in the design of plugging agent injection technology, but the overall effect is still not good. [0003] At present, when designing the amount of plugging agent for fracture water plugging in domestic and foreign oil f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 白英睿尚校森魏发林王增宝刘平德
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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