Over flow forecasting method

An overflow and process technology, applied in the direction of earthwork drilling, measurement, wellbore/well components, etc., can solve the problems of lack of systematic and standardized methods, and achieve the effect of timely and effective prediction and monitoring of overflow

Inactive Publication Date: 2009-09-30
GEOLOGIC LOGGING SHENGLI GASOLINEEUM ADMINISTRATION
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Problems solved by technology

[0002] At present, in the oil field logging site, the prediction of overflow is limited to the analysis and judgment made by the logging operators based on their own experience, and there is a lack of systematic and standardized methods

Method used

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Embodiment Construction

[0017] combined with Figure 1-5 , to further describe the present invention:

[0018] (1), determine the variation characteristics of each parameter during overflow: summarize the variation characteristics and variation rules of each relevant parameter during overflow;

[0019] Table 1 Characteristics of gas measurement and engineering parameters

[0020]

[0021] (2), determine the parameter alarm threshold: determine a reasonable alarm threshold;

[0022] Table 2 Parameter alarm setting range table

[0023] Preface

No parameter name unit threshold set state Remark 1 drill time min / m ±30％ drill into Adjust according to the specific situation 2 vertical pressure MPa ±0.5 drilling, circulation 3 egress traffic ％ ±1 drilling, circulation 4 output temperature ℃ ±3 drilling, circulation 5 Export conductivity mS / cm ±3 drilling, circulation 6 Pool volume at outlet

m 3 ±1 dril...

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Abstract

The invention relates to an over flow forecasting method for well logging fields in an oil field geological exploration field. The over flow forecasting method comprises the following steps: (1) determining change characteristics of each parameter during over flow, i.e. summarizing the change characteristics and the change rules of each relative parameter; (2) determining a parameter alarm threshold, i.e. determining a reasonable alarm threshold; and (3) establishing a flow path judging method, i.e. determining and extrapolating over flows according to the change characteristics of the parameters. The invention has the advantages that the reasonable alarm threshold is determined by summarizing the change characteristics and the change rules of each relative parameter during the over flow, and an over flow extrapolating method and over flow extrapolating steps are determined by the change characteristics of the parameters, thereby the purpose for effectively forecasting and monitoring the over flows in time is achieved.

Description

1. Technical field: [0001] The invention relates to a method for predicting overflow used in mud logging field in the field of oil field geological exploration. 2. Background technology: [0002] At present, in the field of oilfield mud logging, the prediction of overflow is limited to the analysis and judgment made by the mud logging operators based on their own experience, and there is a lack of systematic and standardized methods. 3. Contents of the invention: [0003] The purpose of the present invention is to provide a method for forecasting overflow in view of the above-mentioned defects in the prior art, which can timely and effectively forecast and monitor the occurrence of overflow. [0004] Its technical scheme is: be made up of following steps: [0005] (1), determine the variation characteristics of each parameter during overflow: summarize the variation characteristics and variation rules of each relevant parameter during overflow; [0006] (2), determine th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/10
Inventor 刘宗林慈兴华向巧玲朱兆信王志战马光强
Owner GEOLOGIC LOGGING SHENGLI GASOLINEEUM ADMINISTRATION
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