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Interference well test analysis method for multi-section fractured horizontal well of natural fractured reservoir

A technology for fractured reservoirs and interference well testing, applied in complex mathematical operations, instruments, electrical digital data processing, etc., can solve problems such as horizontal wellbore pressure can not be ignored, and achieve the effect of simple implementation method, efficient production, and good practicability

Pending Publication Date: 2022-02-18
NORTHWEST UNIV(CN)
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Problems solved by technology

[0006] The current main well testing analysis methods assume that the fluid first enters the fracture and then flows into the horizontal wellbore, and the fluid does not directly enter the horizontal wellbore. However, in actual situations, a certain amount of fluid will directly enter the wellbore, and when the horizontal well exceeds a certain length, The pressure drop in a horizontal wellbore cannot be ignored

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  • Interference well test analysis method for multi-section fractured horizontal well of natural fractured reservoir
  • Interference well test analysis method for multi-section fractured horizontal well of natural fractured reservoir
  • Interference well test analysis method for multi-section fractured horizontal well of natural fractured reservoir

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Embodiment Construction

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0065] This embodiment provides a method for analyzing well test interference of multistage fracturing horizontal wells in naturally fractured reservoirs, such as figure 1 As shown, the method includes the following steps:

[0066] Step S1: Collect the basic physical properties of the reservoir, and establish a basic physical model based on information such as the arrangement of injection and production wells, fracturing operation parameters, and basic physical properties of the reservoir. The three parts of the well lead to;

[0067] Among them, the arrangement of inj...

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Abstract

The invention discloses an interference well test analysis method for a multi-section fractured horizontal well of a natural fractured reservoir, which comprises the following steps of: establishing a basic physical model according to an injection and production well arrangement mode, fracturing operation parameters and basic physical property information of the reservoir; according to the dual-pore medium Laplacian domain source function, the dimensionless formation pressure drop in the Laplacian domain of the hydrofracture crack, the dimensionless formation pressure drop in the Laplacian domain caused by the limited flow conductivity horizontal wellbore and the dimensionless formation pressure drop in the Laplacian domain caused by the water injection well are obtained; thereby obtaining a Laplacian domain dimensionless pressure solution considering a well storage effect and a skin factor, carrying out Stehfest numerical inversion to obtain a real space well bottom dimensionless pressure solution, further drawing a relationship among well bottom dimensionless pressure, a pressure derivative and dimensionless time, and completing analysis. The method considers that the crack and the horizontal shaft limited flow guide are both limited flow guide capacity, the implementation method is simple, needed physical parameters can be measured, and practicability is good.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir development, in particular to a method for analyzing the interference of multistage fracturing horizontal wells in natural fracture reservoirs. Background technique [0002] In the process of oil and gas development in natural fracture reservoirs, it is usually necessary to inject water underground to replenish formation energy, and to improve formation permeability by fracturing operations. With the development of horizontal drilling technology and hydraulic fracturing technology, fracturing horizontal wells has been widely used In the development of low-permeability reservoirs, reasonable well parameter settings at the initial stage of development and formulation of technical countermeasures during the development process have a significant effect on increasing the oil and gas production of horizontal wells. Well test analysis is an important means to monitor oil well production pe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G06F30/28G06Q10/06G06Q50/02G06F119/14
CPCG06F17/11G06F30/28G06Q10/06315G06Q50/02G06F2119/14
Inventor 朱玉双樊嘉伟封从军刘林玉
Owner NORTHWEST UNIV(CN)
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