A production decline analysis method and system for oil and gas wells

A technology of decreasing output and analysis method, applied in special data processing applications, instruments, electrical and digital data processing, etc. problem, to achieve the effect of improving the prediction accuracy

Active Publication Date: 2018-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, these three models are all empirical or semi-empirical models. When applied to field wells under the existing technical conditions, technicians often need to select them based on experience. Get sure and reasonable forecast results

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  • A production decline analysis method and system for oil and gas wells
  • A production decline analysis method and system for oil and gas wells
  • A production decline analysis method and system for oil and gas wells

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Embodiment Construction

[0039] figure 1 It is a schematic composition diagram of the oil and gas well production decline analysis system provided by the embodiment of the present invention. From figure 1 It can be seen that the system mainly includes:

[0040] Data collection module 100, collecting daily output and cumulative output data;

[0041] The graph drawing module 200 draws the daily output and material balance time relationship curve according to the daily output and cumulative output data, and the material balance time is the ratio of the cumulative output to the daily output of the time corresponding to it; Curve derivation draws a characteristic line segment, and the characteristic line segment is a line segment whose slope is a specific value;

[0042] The model building module 300 judges the flow field type according to the distribution of the characteristic line segment in the daily output and material balance time relationship curve, and then establishes a corresponding output decl...

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Abstract

The invention provides a method and system for analyzing oil and gas well production decline. The method includes: collecting daily output and cumulative output data; drawing a daily output and material balance time relationship curve according to the daily output and cumulative output data, and the material balance time is the ratio of the cumulative output to the daily output of the corresponding time, and then by Deriving the daily output and material balance time relationship curve to draw a characteristic line segment, the characteristic line segment is a line segment with a specific value; judge the flow field type according to the distribution of the characteristic line segment in the daily output and material balance time relationship curve, and then according to the flow field The corresponding production decline analysis model is established according to the type; finally, the production decline analysis is carried out according to the production decline analysis model. The present invention unifies commonly used production decline models under the same judgment rule, analyzes and selects the adaptability of the production decline model through flow field identification, and can effectively solve the technical problem of uncertain prediction results caused by blind selection of models in the prior art , which improves the accuracy of production dynamic prediction.

Description

technical field [0001] The invention relates to oil and gas exploration prediction technology, in particular to an oil and gas well production decline analysis method and system applicable to production analysis and dynamic evaluation of shale gas wells and other types of oil and gas wells. Background technique [0002] During the development of oil and gas wells (fields), it is necessary to analyze the production decline: (1) predict the dynamic changes in production, and provide a basis for the design of production capacity construction plans and adjustment plans; (2) guide the implementation of measures to delay production decline to achieve stable, high, The purpose of reasonable development; (3) To predict the dynamic change of production, to provide the basis for the prediction of recoverable reserves and recovery rate, and also provide the basis for the economic evaluation of oil and gas wells (fields). Due to the abundant resources and long stable production period, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 庞伟张同义毛军杜娟贺英吴琼邸德家
Owner CHINA PETROLEUM & CHEM CORP
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