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Well-logging analysis method not depending on radial-flow straightway

An analysis method and radial flow technology, applied in earth-moving drilling, wellbore/well components, measurement, etc., can solve the problems of well test data analysis, high efficiency and success rate that cannot avoid the straight section of radial flow, Achieve the effect of shortening work time and improving work efficiency

Inactive Publication Date: 2003-08-27
DAQING OILFIELD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing well test interpretation method cannot analyze the well test data without the straight section of radial flow, the present invention provides a well test analysis method that does not rely on the straight section of radial flow. The data of the straight section of the radial flow is not available for analysis, and the efficiency and success rate are high

Method used

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  • Well-logging analysis method not depending on radial-flow straightway
  • Well-logging analysis method not depending on radial-flow straightway
  • Well-logging analysis method not depending on radial-flow straightway

Examples

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Embodiment 1

[0041] Example 1: Interpretation result map of Fang 190-124 well in Daqing Oilfield, which breaks the current well test analysis method that relies on the interpretation of radial flow straight line, that is, analyzes well test data that does not show radial flow straight line , can explain the permeability distribution of the formation from the actual pressure measurement data, and can also give the pressure distribution and mobility distribution of the formation, which cannot be done by conventional methods, such as figure 1 , 2 , 3 shown.

Embodiment 2

[0042] Embodiment 2: Interpretation results map of Fang 226-100 well in Daqing Oilfield, such as Figure 4 , 5 , 6, it shows that this method can give the permeability distribution, mobility distribution and pressure distribution that vary with the well diameter, while the conventional method can only give the average permeability and average formation pressure.

Embodiment 3

[0043] Embodiment three, the interpretation results map of the North 2-d3-470 well in Daqing Oilfield, such as Figure 7 , 8 , 9, it shows that this method can give the permeability distribution, mobility distribution and pressure distribution that vary with the well diameter, while the conventional method can only give the average permeability and average formation pressure.

[0044] It can be seen that using this method can provide a new interpretation method for the interpretation of pressure measurement data in heterogeneous reservoirs, breaking the existing interpretation method of analyzing the characteristics of the straight line section of the well test curve, and providing a large number of semi-logarithmic straight lines in the field. Interpretation of well test data provides means.

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Abstract

The invention relates to oil well testing method which doesn't depend on radial jet straight segment. It solves the problem that current explanation can't analyze the testing data of independent radial jet straight segment. Its character lies in: according to different actual pressure descents and press recovering data, it calculates the instant penetrating rate Kn of actual testing pressure data; then calculates the detection radius rn; calculates the delta (1 / kn) in pressure descent period; finally, calculates the penetrating rate Kn, and gets the stratum penetrating distribution k(r), which is identical to kn, qherein rn-1<=r E21B 47 / 00 5 16 1 2003 / 2 / 17 1438404 2003 / 8 / 27 0000000 Daqing Oil-Field Co., Ltd. Heilongjiang 163453 Zhang Tongyi Yang Yongzhi Zhang Qibin mi wanze hu zhiwen 23115 The Patent Agency of Daqing City Daqing Municipal Scientific and Technological Commission, Heilongjiang Province 163001

Description

Technical field: [0001] The invention relates to a method used in the field of well testing in oil fields, and belongs to a well testing analysis method independent of radial flow straight line segments. Background technique: [0002] At present, with the gradual deepening of oilfield development, the analysis methods used in well test interpretation are nothing more than conventional and modern well test analysis methods, while conventional well test methods can only be used when the test data has a semi-logarithmic straight line segment; modern well test analysis The method can only use early, middle or late various straight-line features to determine various features of near-wellbore zones, formations or boundaries. However, with the deepening of the development of Daqing Oilfield, the intensification of the well pattern, the implementation of tertiary oil recovery methods, and the development of low-permeability oilfields, the underground situation is becoming more and m...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 张同义杨永智张奇斌
Owner DAQING OILFIELD CO LTD