Oil and gas well production decline analysis method and system

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: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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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

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  • Oil and gas well production decline analysis method and system
  • Oil and gas well production decline analysis method and system
  • Oil and gas well production decline analysis method and system

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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 present invention provides an oil and gas well production decline analysis method and system. The method comprises: collecting daily production and accumulated production data; according to the daily production and accumulated production data, drawing a relational curve of daily production to material balance time, wherein the material balance time is a ratio of the accumulated production to the daily production of a time corresponding to the accumulated production, and by carrying out derivation on the relational curve of daily production to material balance time, drawing a feature line section, wherein the feature line section is a line section whose slope is a specific value; determining a flow field type according to a distribution condition of the feature line section of the relational curve of daily production to material balance time, and establishing a corresponding production decline analysis model according to the flow field type; and finally performing production decline analysis according to the production decline analysis model. According to the method provided by the present invention, commonly used production decline models are unified under the same determination rule, and adaptive analysis and selection of the production decline model are performed by flow field recognition, so that the technical problem of an indefinite prediction result caused by selecting a model blindly in the prior art can be effectively solved, and dynamic production prediction precision is improved.

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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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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