Method for determining production state of self-spraying production oil well

A technology for oil wells and self-spraying, which is applied in earthwork drilling, wellbore/well components, measurement, etc. It can solve the problems of weak universal applicability and improve the development effect

Inactive Publication Date: 2018-06-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the equations proposed are empirical formulas obtained from statistics of multiple oil fields, and the research is mainly on Darcy plane radial flow, which has weak general applicability

Method used

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  • Method for determining production state of self-spraying production oil well
  • Method for determining production state of self-spraying production oil well
  • Method for determining production state of self-spraying production oil well

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Embodiment Construction

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] The embodiment of the present invention provides a method for determining the occurrence of self-spraying production wells, which is used to analyze the occurrence of self-spraying production wells to grasp the development characteristics of the entire oil reservoir, and then determine the production allocation plan of the oil wells to fully Utilize the production potential of the well to improve development results. It includes the following steps:

[0032] Step 1: Collect the production data of three stages in the oil well development process, the three stages are elastic energy release stage, rigid water flooding stage and oil-water two-phase flow stage, and the production data include the oil production Q of the oil well o , nozzle diameter D...

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Abstract

The invention provides a method for determining the production state of a self-spraying production oil well. The method comprises the following steps that 1, production data of three stages in the oilwell development process is collected, a basic relationship is constructed based on the production data, and the basic relationship is used as a fitting target to obtaina single well sample equation;2, the production data is used as a fitting sample, a mathematical statistics analysis method is used for conducting multivariate nonlinear regression analysison the production data of the three stages to obtain a to-be-fitted parameter value of a single wellat each stage, and production stateequations of an elastic energy release phase, a rigid water flooding phase and an oil-water two-phase flow phase are further obtained; 3, fitting degree RNew computation is conducted on well oil production Qo and actual oil productionqO calculated by the production stateequations, and the value of fitting degree RNew is infinitely close to 1 to obtain the optimal solution of the C value. The method has the advantages that the method can help to determine a production allocation scheme of the oil wellto make full use ofproduction potential of the oil well and improve development effects.

Description

technical field [0001] The invention relates to the technical field of oil field recovery, in particular to a method for determining the occurrence state of a self-spraying production well. Background technique [0002] The self-flowing production of the oil well is to use the energy of the oil layer itself to lift the oil and gas to the ground. After the oil well is put into production, the pressure drop is formed at the bottom of the well, and the pressure wave is transmitted from the bottom of the well to the boundary, and the formation pressure gradually decreases. As the formation pressure decreases, the rock expands, and the expanded part of the fluid is pushed to the bottom of the well. The expansion of the rock reduces the pore volume and then discharges the fluid. This process is the elastic energy release stage. The remarkable feature of this stage is that the energy is sufficient but the time is short. When the energy decreases, it shows a large decline, and the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B49/00
CPCE21B47/00E21B49/00
Inventor 韩婷婷陈叔阳潘琳李龙龙周桥李敏齐
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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