1887

Abstract

Summary

The thermal action on the layer forms the basis of process SAGD method that leads to a change in viscosity of the heavy oil, an increase of pressure in the vicinity of steam drainage area, and also in overlying and underlying rocks. All of this observed in the wave field in case of monitoring of heavy oil shallow deposits. The purpose of this work was to create a seismic model when the steam injection is in a reservoir to get an information about seismic effects caused by thermo-acoustic changes of properties in enclosing rocks. This paper describes the research procedure, including all stages of data collection and preparation, seismic model creation, elastic coefficients of core samples analysis received in a result of special laboratory researches, and full-wave modeling. The object of the research is the Cheremshan deposit, the reservoir is applied for to sand layers of the Sheshminsky horizon. The heavy oil deposit is located on the northern part of Cheremshan region of Tatarstan, Russia. It can be concluded, that the elastic characteristics can be significantly changed because of the action of steam on the reservoir which was proved by represented measurements of physical properties of core samples. The velocity of P- and S-waves significantly decreases with an increase of temperature, while the rising pressure leads to an increase of velocity. As a result of the research, the temporal provision of the reflecting surface was defined induced by the reservoir. Also it was founded that the heavy oil pool creates kinematic and dynamic anomalies in a seismic wave field under steam – drive development.

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/content/papers/10.3997/2214-4609.201900602
2019-03-25
2024-03-29
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References

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