Method for analyzing influence factors of production decline of oil and gas field

A technology of oil and gas field production and influencing factors, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as the lack of an effective judgment method

Inactive Publication Date: 2015-07-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the many influencing factors, there is no effective way to judge which is bigger and which is smaller.

Method used

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  • Method for analyzing influence factors of production decline of oil and gas field
  • Method for analyzing influence factors of production decline of oil and gas field
  • Method for analyzing influence factors of production decline of oil and gas field

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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] Step 1: Determine the set of influencing factors

[0046] According to the geological conditions of the oil and gas fields and their respective production time conditions, determine the factors that affect the production decline of the oil and gas fields. The set of factors affecting decline is denoted by X. Assuming that there are m factors affecting the production decline of oil and gas fields, the set of factors to be analyzed can be expressed as:

[0047] X={x 1 ,x 2 ,...,x m}

[0048] Step Two: Determine the Analysis Sequence

[0049] According to each factor in the set of influencing factors, the corresponding historical data is obtained, and one dependent variable factor and multiple independent variable factors are determined. For example, the optional production decline rate is the dependent variable factor, and the independent variable f...

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Abstract

A method for analyzing influence factors of production decline of an oil and gas field includes the following steps that A, an influence factor set is determined; B, an analysis sequence is determined according to historical data; C, non-quantity processing is conducted on analysis sequence data; D, by the adoption of an improved grey correlation analysis method, influence factor association degrees are obtained and ranked; E, by the adoption of a combined hierarchical analysis method, factor weights are calculated and ranked; F, comprehensive analysis is conducted on the sequence obtained in the step D and the sequence obtained in the step E, a final influence degree sequence is obtained, and comprehensive analysis of the influence factors of production decline of the oil and gas field is achieved. According to the method, the determining mode of an identification coefficient p of a conventional grey correlation analysis method is improved, and subjectivity brought by empirical selection is eliminated; by means of the combined hierarchical analysis method, the importance degrees of the influence factors are determined from the subjective aspect and combined with an objective result. Calculation results obtained through the subjective method and the objective method are combined, so that an analysis result is more scientific, accurate and reasonable.

Description

technical field [0001] The present invention relates to an analysis method for influencing factors of production decline in oil and gas fields, in particular to a method for objectively analyzing the influencing factors by using an improved gray relational analysis method, and subjectively judging the influencing indicators by using the combined analytic hierarchy process, and finally realizing the influencing factors of oil and gas field production decline Analytical method. Background technique [0002] With the rapid development of my country's economy, oil, as the lifeblood of economic development, is in increasing demand. However, oil is a non-renewable resource. With the deepening of exploitation, the change of underground energy and the increase of water content in oil field, the output of oil and gas field will inevitably decline in the later stage of development. The analysis of oil and gas field production decline rate is an important content in the development dy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 李克文王义龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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