Nuclear logging data multi-measure processing method

A technology of logging data and processing method, which is applied in the field of nuclear logging data processing and analysis, can solve the problems of neglecting the response of formation parameters, cannot reflect the non-uniformity of remaining oil distribution, etc., and achieves the effect of improving accuracy

Active Publication Date: 2007-11-28
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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Problems solved by technology

These three types of data all contain information on multiple scales, but the existing methods only process and interpret the measured parameters in the one-dimensional depth domain, ignoring the response of formation parameters at different scales, and cannot reflect the remaining oil. non-uniformity of distribution

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  • Nuclear logging data multi-measure processing method

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Embodiment Construction

[0080] The present invention is a multi-scale processing method for nuclear logging data, including the whole process of multi-scale decomposition, fusion and reconstruction from nuclear logging raw data, and finally multi-scale geological interpretation for oil and gas layers, as shown in the accompanying drawing 2, including the following steps:

[0081] 1. Read nuclear logging data

[0082] Nuclear logging data that can be read includes:

[0083] 1.1 Natural gamma ray logging: natural gamma total count rate, natural gamma energy spectrum and uranium, thorium, potassium content;

[0084] 1.2 Scatter gamma logging: total count rate of scatter gamma, scatter gamma energy spectrum, density and lithology index;

[0085] 1.3 Isotope neutron source logging: neutron count rate, capture gamma count rate, capture gamma spectrum and porosity;

[0086] 1.4 Pulse neutron logging: thermal neutron total count rate and thermal neutron time spectrum; pulse neutron logging capture gamma t...

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Abstract

The invention relates to a multi-scale processing method for nuclear logging data, comprising 1, reading logging data; 2, carrying out filtering for logging data; 3, carrying out normalization processing for filtered data; 4, carrying out multi-scale decomposition, amalgamation and reconstruction for logging data after normalization processing; and 5, displaying curve and image. The invention solves the limitation that collected data can be process and interpreted only in 1-D depth region in prior technology. The invention can reflect multi-scale characteristic for oil gas water distribution in multi-dimension space and improve accuracy for describing distribution of residual oil gas saturation.

Description

technical field [0001] The invention relates to a nuclear logging data processing and analysis method. Background technique [0002] Multiscale estimation theory and its application research has become an important branch of information technology and a hot issue in the scientific and technological circles. The objects and processes studied by logging have multi-scale characteristics: entities such as oil reservoirs, reservoirs, cores, cuttings, thin slices, pores, and fractures, whose spatial scales range from several kilometers to several microns; And nuclear physical parameters also constitute a multi-dimensional space; the logging system itself is a typical multi-type sensor complex system. [0003] Nuclear logging is an important branch of geophysical logging and a subsystem of complex logging systems. Each nuclear logging tool must be equipped with one or more sensors of the same type or different types. Each sensor (detector) has its own detection range and can obse...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V5/14
Inventor 黄隆基张锋房文静汪永安杨联会张德民杨连会董谦石丽云
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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