Method for identifying seismic characteristics of sand-in-mud thin reservoir

An identification method and thin reservoir technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve problems such as weak understanding of seismic characteristics, achieve intuitive understanding, reduce exploration risks, and reduce actual exploration risks

Active Publication Date: 2021-06-22
CHINA PETROLEUM & CHEM CORP +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The invention proposes a method for identifying the seismic characteristics of sand-in-mud thin reservoirs, which solves the problem of relatively weak understanding of the seismic characteristics of sand-in-mud thin reservoirs in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for identifying seismic characteristics of sand-in-mud thin reservoir
  • Method for identifying seismic characteristics of sand-in-mud thin reservoir
  • Method for identifying seismic characteristics of sand-in-mud thin reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0067] The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0068] The method for identifying the seismic characteristics of a mud-coated sand type thin reservoir of the present invention includes the following steps in sequence:

[0069] Step 1: Perform spectrum analysis and synthetic seismic records based on known wells to obtain seismic wavelets of the target layer;

[0070] Step 1.1: Obtain a comprehensive profile of known wells such as figure 1 , and the spectrum of seismic data near the well can be obtained from the rele...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for identifying seismic characteristics of a sand-in-mud thin reservoir. The method comprises the following steps: obtaining seismic wavelets of a target layer; calculating the PAM; calculating the mudstone velocity Vm and the sandstone velocity Vs of the target layer; judging whether the target layer sandstone is concentrated in a half apparent main period or not; calculating the thickness ranges of the resonance strengthening area and the resonance weakening area; constructing a sand-in-mud geologic model with gradually increased sandstone thickness; dividing a target layer into a mudstone area, a resonance strengthening area and a resonance weakening area; under the condition that the Ricker wavelet is given, obtaining a model synthesis seismic record, and marking the reflection range of a resonance area; and performing type division on the seismic waveforms in the resonance area range by comparing with a sand-in-mud geologic model, and establishing a relationship between different types of seismic waveforms and amplitudes and sand body development. According to the method, information on a sand-in-mud type seismic section can be well explained, the information on the seismic section can be utilized to help explanation, sand body development is facilitated, and exploration risks are reduced.

Description

technical field [0001] The invention relates to a method for identifying seismic characteristics of reservoirs, in particular to a method for identifying seismic characteristics of silt-coated sand thin reservoirs, and belongs to the technical field of geological exploration methods. Background technique [0002] In most of the basins in the world dominated by continental sand and mud deposits, with the deepening of oilfield exploration and development in the basins, the probability of discovering thick oil and gas reservoirs is getting smaller and smaller. The oil and gas reservoirs with thin reservoirs are mainly characterized by layers, and the discovery of such oil and gas reservoirs is far more difficult than that of thick reservoirs. In order to better discover such thin-layer oil and gas reservoirs, it is necessary to better identify the performance characteristics of such oil and gas reservoirs. Among many typical thin reservoir sand-mud combination types, mud-coate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/301
Inventor 陈军鲍祥生裴然
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap