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Sedimentary strata cycle division method and device

A stratigraphic and geophysical technology, applied in the field of geological exploration, can solve the problems affected by human factors and lack of objectivity, and achieve the effect of small human factors and objective calculation process

Active Publication Date: 2020-03-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method and device for dividing sedimentary strata cycles, which are used to solve the technical problems in the prior art that manual empirical judgment is required when dividing sedimentary strata, which is affected by human factors and lacks objectivity

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  • Sedimentary strata cycle division method and device
  • Sedimentary strata cycle division method and device
  • Sedimentary strata cycle division method and device

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Embodiment 1

[0057] figure 1 A schematic flow chart of the sedimentary stratum cycle division method provided in Embodiment 1 of the present invention; figure 1 As shown, this embodiment provides a method for dividing sedimentary strata cycles, including step 101-step 106.

[0058] Wherein, step 101, preprocessing the acquired data reflecting the original depositional environment and lithology changes of the stratum to obtain preprocessed data, the data include geochemical analysis data of rock samples, geophysical logging data and seismic data.

[0059] In this embodiment, rock sample geochemical analysis data, geophysical logging data and seismic data are selected as data. According to the correlation between the above data and the change of sedimentary facies and lithofacies, or the data recorded in the published literature that can reflect the original depositional environment and lithology changes of the stratum, the data should be selected. Among them, geophysical logging data and ...

Embodiment 2

[0072] This embodiment is a supplementary description based on the above embodiments.

[0073] figure 2 A schematic flow chart of the sedimentary stratum cycle division method provided in Embodiment 2 of the present invention; as figure 2 As shown, this embodiment provides a method for dividing sedimentary strata cycles, including:

[0074] Wherein, step 1011, normalize and standardize the geophysical data to obtain standardized data, wherein the geophysical data includes geophysical logging data and seismic data.

[0075] Based on the geochemical analysis data of rock samples, geophysical logging data and seismic data, according to the correlation between the above data and sedimentary facies and lithofacies changes, or the published literature records that can reflect the original sedimentary environment and lithological changes of the strata Geophysical logging data and seismic data are generally continuous data, and normalization and standardization are performed on di...

Embodiment 3

[0091] This embodiment is an embodiment of a device, which is used to execute the method in the first embodiment above.

[0092] image 3 Schematic diagram of the structure of the sedimentary stratum cycle division device provided in Embodiment 3 of the present invention; as image 3 As shown, this embodiment provides a sedimentary stratum cycle division device, including: a preprocessing module 201, an eigenmode function acquisition module 202, an instantaneous frequency curve acquisition module 203, a Milankovitch cycle curve acquisition module 204, which can accommodate A spatial variation curve acquisition module 205 and a division module 206 .

[0093] Among them, the preprocessing module 201 is used to preprocess the obtained data reflecting the original depositional environment and lithology changes of the stratum to obtain preprocessed data, which include rock sample geochemical analysis data, geophysical logging data and seismic data;

[0094] The eigenmode functio...

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Abstract

The invention provides a cycle division method and apparatus of a sedimentary stratum. The method comprises: pretreatment is carried out on obtained data reflecting an original stratum sedimentary environment and a lithological change to obtain pretreatment data; empirical mode decomposition is carried out on the pretreatment data to obtain a plurality of intrinsic modal functions; conversion is carried out on each intrinsic modal function to obtain an instantaneous frequency curve corresponding to the intrinsic modal function; according to the instantaneous frequency curve, a Milankovitch cycle curve is obtained; on the basis of the Milankovitch cycle curve, an accommodating space changing curve is obtained; and according to the accommodating space changing curve, an accommodating spatialascending half cycle and an accommodating spatial descending half cycle are obtained. According to the division method, the calculation process is objective and the influence on the process by the human factor is low. And the division method has high operability.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method and device for dividing sedimentary stratum cycles. Background technique [0002] High-frequency cycle identification is an important part of geological exploration work, and high-precision sequence stratigraphic division and correlation is the necessary basis for fine reservoir prediction. [0003] In the prior art, the methods for applying empirical mode decomposition to formation cycle identification include: on the basis of establishing a seismic or logging model corresponding to the target layer, the formation cycle is identified and divided through frequency changes (CN101349764A; CN101349764B; Sun Xinggang et al., Xi Application of time-frequency analysis of Albert-Huang transform in the division of sedimentary cycles, Petroleum Geology and Recovery, November 2012); directly correspond different levels of eigenmode functions to different levels of sequence le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/50G01N33/24
CPCG01N33/24G01V1/50G01V2210/614
Inventor 高晓鹏王毅李慧莉云金表李京昌周波杨伟利张仲培蔡习尧
Owner CHINA PETROLEUM & CHEM CORP
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