Download or read book Steam Assisted Gravity Drainage SAGD Process written by Faisal F. Khan and published by . This book was released on 2013 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details the theory and the importance of the steam chamber in a Steam Assisted Gravity Drainage (SAGD) process. An accurate understanding of the steam chamber is critical in determining the oil recovery from a heavy oil reservoir.

Download or read book A NUMERICAL ANALYSIS OF THE SINGLE WELL STEAM ASSISTED GRAVITY DRAINAGE SW SAGD PROCESS written by and published by . This book was released on 2001 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Steam Assisted Gravity Drainage written by Lance A. Hobbs and published by . This book was released on 1997 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Gain Efficiency in Steam Assisted Gravity Drainage SAGD written by Najeeb Alharthy and published by . This book was released on 2010 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steam assisted Gravity Drainage with Vertical Steam Injection Wells written by Gurpreet Singh Sawhney and published by . This book was released on 1993 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steam assisted Gravity Drainage Process Enhancement written by Jian Gong and published by . This book was released on 2002 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steam assisted Gravity Drainage with Vertical Steam Injection Wells written by Harold Randolf Liebe and published by . This book was released on 1991 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steam assisted Gravity Drainage with Vertical Steam Injection Wells microform written by Gurpreet Singh Sawhney and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1994 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Simulation of Single well Steam Assisted Gravity Drainage SW SAGD written by Keith T. Elliot and published by . This book was released on 1999 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Simulation of Single Well Steam Assisted Gravity Drainage SW SAGD SUPRI TR 119 written by and published by . This book was released on 1999 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steam assisted gravity drainage (SAGD) is an effective method of producing heavy oil and bitumen. In a typical SAGD approach, steam is injected into a horizontal well located directly above a horizontal producer. A steam chamber grows around the injection well and helps displace heated oil toward the production well. Single-well (SW) SAGD attempts to create a similar process using only one horizontal well. This may include steam injection from the toe of the horizontal well with production at the heel. Obvious advantages of SW-SAGD include cost savings and utility in relatively thin reservoirs. However, the process is technically challenging. 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 take place. Ideally heating should occur with minimal circulation or bypassing of stream. Since project economics are sensitive to early production response, we are interested in optimizing the start -up procedure.

Download or read book Thermal Recovery of Oil and Bitumen written by Roger M. Butler and published by Englewood Cliffs, N.J. : Prentice Hall. This book was released on 1991 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the recovery of heavy oils and bitumen by in situ thermal methods and discusses the technical factors and problems involved. The book summarizes, in a quantitative manner, techniques used in current petroleum industry practice.

Download or read book Investigation of Production Mechanism of Steam Assisted Gravity Drainage by Computerized Tomography written by Tamer Erdoğmuş and published by . This book was released on 2002 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improved Modeling of the Steam assisted Gravity Drainage SAGD Process written by Prince Nnamdi Azom and published by . This book was released on 2013 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Steam-Assisted Gravity Drainage (SAGD) Process involves the injection of steam through a horizontal well and the production of heavy oil through a lower horizontal well. Several authors have tried to model this process using analytical, semi-analytical and fully numerical means. In this dissertation, we improve the predictive ability of previous models by accounting for the effect of anisotropy, the effect of heat transfer on capillarity and the effect of water-in-oil (W/O) emulsion formation and transport which serves to enhance heat transfer during SAGD. We account for the effect of anisotropy during SAGD by performing elliptical transformation of the resultant gravity head and resultant oil drainage vectors on to a space described by the vertical and horizontal permeabilities. Our results, show that unlike for the isotropic case, the effect of anisotropy is time dependent and there exists a given time beyond which it ceases to have any effect on SAGD rates. This result will impact well spacing design and optimization during SAGD. Butler et al. (1981) derived their classical SAGD model by solving a 1-D heat conservation equation for single phase flow. This model has excellent predictive capability at experimental scales but performs poorly at field scales. By assuming a linear saturation -- temperature relationship, Sharma and Gates (2010b) developed a model that accounts for multiphase flow ahead of the steam chamber interface. In this work, by decomposing capillary pressure into its saturation and temperature components, we coupled the mass and energy conservation equations and showed that the multi-scale, multiphase flow phenomenon occurring during SAGD is the classical Marangoni (or thermo-capillary) effect which can be characterized by the Marangoni number. At low Marangoni numbers (typical of experimental scales) we get the Butler solution while at high Marangoni numbers (typical of field scales), we approximate the Sharma and Gates solution. The Marangoni flow concept was extended to the Expanding Solvent SAGD (ES-SAGD) process and our results show that there exists a given Marangoni number threshold below which the ES-SAGD process will not fare better than the SAGD process. Experimental results presented in Sasaki et al. (2002) demonstrate the existence of water-in-oil emulsions adjacent to the steam chamber wall during SAGD. In this work we show that these emulsions enhanced heat transfer at the chamber wall and hence oil recovery. We postulate that these W/O emulsions are principally hot water droplets that carry convective heat energy. We perform calculations to show that their presence can practically double the effective heat transfer coefficient across the steam chamber interface which overcomes the effect of reduced oil rates due to the increased emulsified phase viscosity. Our results also compared well with published experimental data. The SAGD (and ES-SAGD) process is a short length-scaled process and hence, short length-scaled phenomena (typically ignored in other EOR or conventional processes) such as thermo-capillarity and in-situ emulsification should not be ignored in predicting SAGD recoveries. This work will find unique application in predictive models used as fast proxies for predicting SAGD recovery and for history matching purposes.

Download or read book Tar Sands written by Andrew Nikiforuk and published by Greystone Books Ltd. This book was released on 2010-08-01 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tar Sands critically examines the frenzied development in the Canadian tar sands and the far-reaching implications for all of North America. Bitumen, the sticky stuff that ancients used to glue the Tower of Babel together, is the world’s most expensive hydrocarbon. This difficult-to-find resource has made Canada the number-one supplier of oil to the United States, and every major oil company now owns a lease in the Alberta tar sands. The region has become a global Deadwood, complete with rapturous engineers, cut-throat cocaine dealers, Muslim extremists, and a huge population of homeless individuals. In this award-winning book, a Canadian bestseller, journalist Andrew Nikiforuk exposes the disastrous environmental, social, and political costs of the tar sands, arguing forcefully for change. This updated edition includes new chapters on the most energy-inefficient tar sands projects (the steam plants), as well as new material on the controversial carbon cemeteries and nuclear proposals to accelerate bitumen production.

Download or read book A New Steam Assisted Gravity Drainage Process Utilizing Vertical Wells written by Mohamed Ezeddin Shirif and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel process utilizing vertical wells to enhance heavy oil recovery during steam assisted gravity drainage has been developed. In the vertical well steam assisted gravity drainage (VWSAGD) process, the vertical well includes two production strings which are separated by three packers (one dual and two single packers): the short injection string (SIS) is attached to the bottom of the annulus and completed in the top quarter of the perforated formation, while the long production string (LPS) is attached to the bottom of the production tubing and completed in the bottom quarter of the perforated formation. The new process (VWSAGD) requires an initial start-up period (warm-up stage) where the steam is injected into both of the injection strings and production string for a specified period of time of about 14-30 days; then both strings are closed to injection for a specified time period of approximately 7-10 days (soaking period). After the initial warm-up and the soaking period, the long production string is opened for production, and the short injection string is opened to continuous steam injection for the rest of the specified simulation time. A numerical simulation study using the CMG-STAR Simulator was performed to compare the performance of the new VWSAGD process against the conventional steam assisted gravity drainage (HWSAGD) process under the same operating conditions. Two identical reservoir models were simulated for the two processes using 3-Dimensional, black heavy oil model (14°API). Each reservoir type consists of 49x49x20 grid blocks on a 5 Acre model which incorporated a typical heavy oil reservoir rock and fluid properties taken from the SPE case study, stspe001.dat (CMG 2014 release). A sensitivity analysis for both processes was performed for the grid density, soaking time, steam quality, bottom hole producing pressure, steam injection rate, reservoir thickness, reservoir area, and horizontal to vertical permeability anisotropy. More preferable reservoir conditions are those such as high horizontal to vertical permeability ratio, thick reservoir oil zones, as well as improved reservoir recovery for the VWSAGD process. Under unfavorable conditions such as thin reservoir oil zones, an improved reservoir recovery response was limited for the VWSAGD process and could be uneconomical in real field cases. Finally, the simulation results from this study include cumulative recoveries, Steam oil ratios, produced water-oil ratios, pressure and temperature distributions, and production rates. Also, the results from this study have shown that the new VWSAGD process is more favorable than the conventional HWSAGD process.

Download or read book Design and Real time Process Optimisation of Steam Assisted Gravity Drainage for Improved Heavy Oil Recovery written by Amol Bhagwan Bali and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In situ Visualization of Steam Assisted Gravity Drainage with Chemical and Solvent Additives written by Mira Kim and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: