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Phase control inversion method for waterway reservoir stratums stacked on alluvial fan

A reservoir and water channel technology, applied in the field of petroleum exploration, can solve the problems of serious superposition of vertical channel sediments, complicated lateral swing of water channels, and inability to vertically superimposed channel facies constraints, etc.

Active Publication Date: 2015-01-21
CHENGDU NORTH OIL EXPLORATION DEV TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a facies-controlled inversion method for superimposed channel reservoirs on a fan, which solves the problem of serious overlapping of sedimentary bodies in vertical channels and the complicated horizontal swing of channels in space. Traditionally, sedimentary facies are first established and then phase-controlled Modeling methods cannot constrain vertically overlapping and repeated channel facies

Method used

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  • Phase control inversion method for waterway reservoir stratums stacked on alluvial fan
  • Phase control inversion method for waterway reservoir stratums stacked on alluvial fan
  • Phase control inversion method for waterway reservoir stratums stacked on alluvial fan

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Embodiment 1

[0062] Such as Figure 1 to Figure 5 As shown, the present embodiment includes the following construction steps,

[0063] Step 1: According to the reflection intensity, frequency component and reflection structure of the channel reservoir on the seismic section, extract the seismic attributes of this place; for example, extract the attributes such as root mean square amplitude, relative impedance, sweet spot and coherence of this place.

[0064] Step 2: According to the ratio of the vertical thickness of the channel sedimentary body in the target layer to the entire strata, determine the number of stratum slice layers, and carry out stratum slices to extract various seismic attributes of the channel reservoir; for example, the average thickness of the channel sand body is 10ms, If the stratum thickness is 50ms, the number of stratum slices is 5.

[0065] Step 3: Carry out unsupervised neural network clustering analysis on the seismic attributes extracted from each sublayer, a...

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Abstract

This invention discloses a phase control inversion method for waterway reservoir stratums stacked on an alluvial fan. Seismic facies are classified based on a plurality of kinds of seismic attributes, the characteristics of original seismic data on different geologic bodies in the aspects of reflection strength, frequency components, geometric characteristics and the like are taken into full consideration, and the defect that conventional seismic inversion mainly depends on seismic reflection strength is compensated for; meanwhile, due to the method that stratal slices are formed on each stratum, the defect that under the condition of stacking of waterway sedimentation on the alluvial fan or other sedimentary facies in the vertical direction, a single sedimentary facie or a geologic facies planar graph can not provide vertical constraints is effectively overcome.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a phase-controlled inversion method for superimposed channel reservoirs on a fan. Background technique [0002] Geological facies and sedimentary facies: Sedimentary facies are the sum of the environment, conditions and characteristics of sediment formation, and rocks with the same composition form the same facies. [0003] Seismic phase: a three-dimensional seismic reflection unit defined by seismic reflection parameters such as amplitude, frequency, phase, event, and reflection structure. It is the seismic response of a specific sedimentary facies or geological body [0004] Facies-controlled inversion: facies-controlled is to use facies (sedimentary microfacies, lithofacies, seismic facies, logging, etc.) model, and a method for performing seismic inversion. [0005] The disadvantages of traditional phase-controlled inversion: [0006] It is necessary to estab...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G06F19/00G06N3/02
Inventor 卢立泽王贺华杨滔付辉米中荣韩绪军杨鸿张博钱利桂碧雯符奇王荣新何巍马成张艺久蒋利平洪余刚黄海平臧克一李鑫袁浩刘家材
Owner CHENGDU NORTH OIL EXPLORATION DEV TECH
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