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Beach facies reservoir prediction method and device

A technology for reservoir prediction and geological layer, applied in the directions of geophysical measurements and instruments, can solve the problems of inability to effectively distinguish between marl and shoal facies reservoirs, low and inaccurate reservoir prediction accuracy, etc., to achieve reservoir prediction The results are objective and accurate, avoiding subjective factors and technical level, and the effect of strong operability

Pending Publication Date: 2022-01-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method and device for predicting shoal facies reservoirs, which is used to solve the problem of missing or insufficient pre-stack seismic data in the target work area and the sedimentary facies division scheme of the target work area is not accurate enough, only using conventional post-stack The inversion method cannot effectively distinguish marl and shoal facies reservoirs, resulting in low accuracy of reservoir prediction

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  • Beach facies reservoir prediction method and device
  • Beach facies reservoir prediction method and device
  • Beach facies reservoir prediction method and device

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[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Method example:

[0035] The shoal facies reservoir prediction method of the present embodiment (hereinafter referred to as the present embodiment method) is as follows figure 1 As shown, the method includes the following steps:

[0036] (1) Obtain the post-stack seismic data and logging data of the target work area, and combine the well and seismic data to obtain the horizon data of the target layer;

[0037] (2) Use the post-stack seismic data and logging data of the target work area to perform post-stack inversion to obtain the inversion impedance data volume of the target layer, and remove the limestone impedance data volume in the inversion impedance data volume according to the limestone impedance threshold value , to obtain the impe...

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Abstract

The invention provides a beach facies reservoir prediction method and device, which belong to the field of oil and gas geology and geophysical exploration. The method comprises the following steps of performing post-stack inversion to obtain an inversion impedance data body of a target layer, and removing limestone to obtain an impedance data body after limestone removal, processing the horizon data of the target layer by using an isochronous geological slicing technology to obtain an isochronous geological sequence framework of the target layer, and performing attribute extraction on the impedance data volume after limestone removal along each isochronous geological slice in the isochronous geological sequence framework to obtain a seismic attribute sequence slice of the target layer, and selecting an area in which sequence migration exists in the seismic attribute sequence slices and the migration process is the same as the sea level change rule as a favorable zone for beach facies reservoir development. The marlstone reservoir and the beach facies reservoir can be effectively distinguished only through the post-stack seismic data, the method is suitable for the situation that new areas or well data and pre-stack data are deficient, the influence of subjective factors and the technical level of geological researchers can be effectively avoided, and the reservoir prediction result is more objective and accurate.

Description

technical field [0001] The invention relates to a method and device for predicting shoal facies reservoirs, belonging to the technical fields of oil and gas geology and geophysical exploration. Background technique [0002] Marine carbonate rock exploration has always been a hot spot in oil and gas exploration. About 60% of the large oil and gas fields discovered in the world are marine carbonate rock deposits. Such oil and gas fields generally have the characteristics of thick oil layers, good storage properties, and high single-well production. Among them, the carbonate rock reef-shoal facies gas field is a kind of lithologic oil and gas reservoir and subtle oil and gas reservoir, which has always been the focus and difficulty of carbonate rock oil and gas exploration. Many large carbonate reef-shoal facies gas fields have been discovered in the , Permian, and Triassic. The difficulty in the exploration of this type of oil and gas reservoirs is how to accurately describe t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00Y02A10/40
Inventor 占小刚欧阳甜子邓国振张利红程杨李东霞王美格吕宏茹
Owner CHINA PETROLEUM & CHEM CORP
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