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Reservoir fluid distribution quantitative interpretation method based on rock physical model theory

A petrophysical model, quantitative interpretation technology, applied in the field of reservoir fluid distribution

Active Publication Date: 2016-06-08
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

However, the quantitative interpretation of rock properties and fluid distribution using geophysical methods still faces many challenges and uncertainties

Method used

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  • Reservoir fluid distribution quantitative interpretation method based on rock physical model theory
  • Reservoir fluid distribution quantitative interpretation method based on rock physical model theory
  • Reservoir fluid distribution quantitative interpretation method based on rock physical model theory

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0037]Such as figure 1 As shown, the present invention provides a method for quantitatively interpreting reservoir fluid distribution based on petrophysical model theory. This method uses the established three-dimensional geological model to perform pre-stack joint inversion with gather data from different angles to obtain lithology and oil-gas content. The velocity and density of compressional and shear waves can be obtained from the elastic parameters related to the properties. At the same time, the data obtained from the petrophysical model can be used to invert the reservoir physical properties to obtain the porosity and shale content parameters. The fluid properties of the comprehensive fluid properties can be used to identify the fluid sensitivity of the reservoir. Factors, through the obtained compressional and shear wave velocities, density an...

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Abstract

The invention relates to a reservoir fluid distribution quantitative interpretation method based on the rock physical model theory. The method includes the steps that a Gassmann model is determined as a rock physical model and is calibrated; on the basis that elastic parameters related to lithological characters and oil-gas possibility are obtained by carrying out pre-stack simultaneous inversion with gather data of different angles, oil bearing parameters before and after exploitation are acquired based on the rock physical model; meanwhile, quantitative porosity and shale content parameters are obtained through reservoir physical property inversion, and the porosity and shale content parameters are corrected with an iterative modification and verification method based on the rock physical model; fluid factors are resolved by combining the rock physical model, a longitudinal wave observation result and a transverse wave observation result; oil saturation or water saturation in a basal state and oil saturation or water saturation in a monitoring state are obtained according to the rock physical model, sound wave parameters and the fluid factors, and are respectively corrected together with production dynamic data; remaining oil distribution is obtained on the basis that oil saturation in the monitoring state is obtained according to the corrected oil saturation in the basal state and the corrected oil saturation in the monitoring state.

Description

technical field [0001] The present invention relates to a reservoir fluid distribution method, in particular to a quantitative interpretation of reservoir fluid distribution based on petrophysical model theory that uses time-lapse seismic research and analysis of remaining oil distribution in the field of seismic and comprehensive reservoir research in oil field development method. Background technique [0002] As a hot technology in the world, time-lapse seismic technology is a technology that uses the difference information of two or more seismic responses to study the dynamic characteristics of reservoirs. It has been successfully applied in various regions of the world. And it has gradually become one of the effective means for oilfield development, searching for remaining oil and gas distribution, and ultimately improving oilfield recovery. The use of changes in seismic response at different points in time to monitor changes in oil and gas reservoirs has become an effe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/05
CPCG06F30/367G06F2119/06G06T17/05
Inventor 胡光义范廷恩黄旭日张会来张显文高云峰李法律王宗俊乐靖苑志旺董建华田建华周建楠
Owner CHINA NAT OFFSHORE OIL CORP
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