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Method for sedimentary system interpretation based on fractional-frequency seismic reflection energy stratigraphic slice

A technology of seismic reflection and stratum slicing, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve difficult problems

Inactive Publication Date: 2017-05-24
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology

Therefore, in this case, it will be very difficult to interpret the lithology using the amplitude, and it is very likely that the sandstone with excellent storage performance will be interpreted as mudstone

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  • Method for sedimentary system interpretation based on fractional-frequency seismic reflection energy stratigraphic slice
  • Method for sedimentary system interpretation based on fractional-frequency seismic reflection energy stratigraphic slice
  • Method for sedimentary system interpretation based on fractional-frequency seismic reflection energy stratigraphic slice

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Embodiment Construction

[0036] The present invention will be further described in detail in conjunction with specific embodiments.

[0037] This example is to study the plane distribution characteristics of the sedimentary system of the Upper Paleozoic Heba member in the Gaojiahe three-dimensional area of ​​the Yanchang exploration area in the Ordos Basin by using the method of interpreting the sedimentary system based on the stratigraphic slice of the frequency-divided seismic reflection energy.

[0038] See eg figure 1 Method flowchart of the present invention, the present embodiment comprises the following steps:

[0039] The first step is to statistically analyze the petrophysical characteristics of sand and mudstone

[0040]In this embodiment, statistical analysis is made on the acoustic transit time logging (AC), natural gamma ray logging (GR) and logging interpreted porosity (POR) data of Heba Member. It can be seen from the intersection diagram of AC-GR-POR, see figure 2 , Sandstone GR is...

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Abstract

The invention discloses a method for sedimentary system interpretation based on a fractional-frequency seismic reflection energy stratigraphic slice. A time-frequency analysis is introduced into the seismic sedimentology study and a frequency band with weak seismic reflection wave interference effect can be selected. Meanwhile, superiority of using seismic reflection energy for replacing the amplitude for sedimentary system interpretation is demonstrated. Therefore, the precision of interpreting the sedimentary system by using seismic information can be improved; and the multiplicity of interpretation can be reduced. The method has the broad application range and high practicability.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technology of using seismic information to interpret depositional systems, and in particular relates to a method for interpreting depositional systems based on stratum slices of frequency-divided seismic reflection energy. [0003] 【Background technique】 [0004] The introduction of seismic information in the study of sedimentary systems has become the general trend and is becoming a research hotspot. Seismostratigraphy, which originated from two-dimensional earthquakes, reflects changes in sedimentary systems by studying the changes in the amplitude of seismic reflections, the frequency of seismic reflections, the continuity of seismic reflection events, and the structure and shape of seismic reflections. However, the accuracy of this method is low, and the application of seismic stratigraphy is mainly limited to low-grade (secondary or tertiary), thick stratigraphic combinations in the absence of control of a larg...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/30G01V1/307G01V2210/63G01V2210/614G01V2210/21
Inventor 赖生华梁全胜王永炜赵永刚张宇航乔向阳
Owner XI'AN PETROLEUM UNIVERSITY
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