NDLI: A NUMERICAL ANALYSIS OF THE SINGLE-WELL STEAM ASSISTED GRAVITY DRAINAGE (SW-SAGD) PROCESS

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A NUMERICAL ANALYSIS OF THE SINGLE-WELL STEAM ASSISTED GRAVITY DRAINAGE (SW-SAGD) PROCESS

Content Provider	United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV)
Author	Elliot, K. T. Kovscek, A. R.
Organization	Stanford University (US)
Abstract	Steam assisted gravity drainage (SAGD) is an effective method to produce heavy oil and bitumen which are important energy resources. In a typical SAGD approach, steam is injected into a horizontal well located directly above a horizontal producer helping to displace heated oil. Single-well (SW) SAGD attempts to create a similar process using only one horizontal well. To improve early-time response of SW-SAGD, it is necessary to heat the near-wellbore area to reduce oil viscosity and allow gravity drainage to begin. Ideally heating should occur with minimal circulation or bypassing of steam. We have investigated early-time processes to improve reservoir heating. A numerical simulation study was performed to gauge combinations of cyclic steam injection and steam circulation prior to SAGD in an effort to better understand and improve early-time performance. Results from this study, include cumulative recoveries, temperature distributions, and production rates. It is found that cyclic steaming of the reservoir offers the most favorable option for heating the near-wellbore area to create conditions that improve initial SAGD response. More favorable reservoir conditions such as low viscosity, thick oil zones, and solution gas, improved reservoir response. Under unfavorable conditions, response was limited.
Sponsorship	(US)
Related Links	https://www.osti.gov/biblio/823162
Page Count	36
File Format	PDF
DOI	10.2172/823162
Language	English
Publisher Date	2001-06-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	PETROLEUM OIL SHALES AND TAR SANDS BITUMENS DRAINAGE HEATING NUMERICAL ANALYSIS PERFORMANCE PRODUCTION SIMULATION STEAM STEAM INJECTION TEMPERATURE DISTRIBUTION VISCOSITY
Content Type	Text
Resource Type	Technical Report

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