曲率属性在河流相储层内部不连续性检测中的应用

doi:10.11720/wtyht.2021.1079

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Abstract

The discontinuity characteristic of fluvial facies sandstone reservoir due to lithology,physical property and micro-structural changes is an important factor that hinders fluid flow and affects the efficiency of injection and production.Therefore,the study of these discontinuity characteristics is of great significance for oilfield development.Such discontinuous features usually appear as seismic amplitude and waveform changes,distortion of seismic phase axis,et al.Since the scale of discontinuous features is usually smaller than the resolution of seismic data,it is difficult to accurately identify them by conventional methods.Model forward analysis found that curvature attributes have high detection accuracy for sand body discontinuity.The application of reservoir unit in an oilfield in Bohai shows that the reservoir discontinuity detection results with curvature attributes are consistent with tracer test results of the later production dynamics,which verifies the reliability of the method and provides a powerful support for the efficient development of the oilfield.

Key words： curvature attributes fluvial facies reservoir reservoir discontinuity oilfield development

Received: 21 February 2020 Published: 29 April 2021

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	Articles by authors
	Jing-Yu ZHANG
	Ting-En FAN
	Hai-Feng WANG
	Xian-Wen ZHANG
	Xin DU

Cite this article:

Jing-Yu ZHANG,Ting-En FAN,Hai-Feng WANG, et al. Application of curvature attributes to fluvial reservoirs discontinuity detection[J]. Geophysical and Geochemical Exploration, 2021, 45(2): 450-457.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1079 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I2/450

Geological meaning of curvature attribute

Forward model of sandbody

Seismic profile of forward model

Model data test result
a—forward model of sandbody;b—sum negative amplitude attribute

Multi-channel complex 3D model
a—plane position projection;b—vertical relationship

RMS amplitude attribute

Calculated total amplitude attribute using curvature volume

Reservoir profile of Nml Q oilfield

Comparison of seismic profile and curvature attribute profile of real data

Curvature attributes of target sand body

Correspondence between reservoir discontinuity results and production dynamics

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