Standardization Method of Multi-well Logging Curves Tend to Low Frequency Trend

A technology of well logging curve and low frequency trend, applied in seismology and seismic signal processing for well logging records, can solve the problems of not being able to find standard layers in the whole area, dispersing distribution, not getting results, etc. Accurate effect of standardized logging curves

A technology of well logging curve and low frequency trend, applied in seismology and seismic signal processing for well logging records, can solve the problems of not being able to find standard layers in the whole area, dispersing distribution, not getting results, etc. Accurate effect of standardized logging curves

CN104849763BActive Publication Date: 2017-08-25CHINA PETROLEUM & CHEM CORP +1
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  • Standardization Method of Multi-well Logging Curves Tend to Low Frequency Trend
  • Standardization Method of Multi-well Logging Curves Tend to Low Frequency Trend
  • Standardization Method of Multi-well Logging Curves Tend to Low Frequency Trend

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[0039] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] Such as Image 6 As shown, a multi-well logging curve standardization method tending to low frequency trend, including the following steps:

[0041] 1) In the known oil and gas field work area, carry out well seismic calibration for all the logging wells that need to be standardized, and use the P-wave curve and density curve of the well logging for well seismic calibration, so that all the wells that need to be standardized in the work area are in the same geological Correct the background. The reliability of the standardization of multi-well logging curves is guaranteed. figure 1 In the middle, the left side is ...

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Abstract

The invention discloses a method for standardizing multi-well logging curves tending towards low frequency. The method comprises the following steps: 1) In a known oil and gas field work area, carry out well seismic calibration on multiple logging wells to be standardized, and obtain the required logging curves. The compressional wave curve, density curve and seismic stacking data of wells; the log curves to be standardized for each well are filtered by FIR digital filter, and only the low-frequency information of the log curves is retained to obtain low-frequency trend lines; The low-frequency trend lines of the wells are averaged to obtain the common low-frequency trend lines of all wells in the oilfield work area; with the common low-frequency trend lines as the standard, the log curves to be standardized for each well are corrected to obtain a standardized curve. The invention provides a multi-well logging curve standardization method tending to low frequency trend which can be completed without using the standard well and standard layer of the logging curve.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a method for standardizing multi-well logging curves tending to low frequency. Background technique [0002] In the process of exploration and development of oil and gas fields, well logging curves are the basis of geological stratification and prediction of oilfield reservoirs. Due to the inconsistency in the calibration of different series of instruments in different periods, there must be errors mainly caused by the calibration factor among the log curve data. The process of eliminating this error is called multiwell log normalization. [0003] At present, there are mainly three methods for the standardization of multi-well logging curves: ①Frequency histogram method: the frequency histogram is to divide the logging values ​​of different well standard layers into several segments, and count the logging values ​​of each standard layer in each well...

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Application Information

Patent Timeline
25 Aug 2017
Publication
CN104849763B
IPC
G01V1/48
Inventors
黄麟云; 郁飞