Journal issues: 3/2015
Language: (RU, EN)
STUDY OF STEAM-ASSISTED GRAVITY DRAINAGE TECHNOLOGY EFFICIENCY IN CONDITIONS OF HETEROGENEOUS HEAVY OIL DEPOSITS
FSBEI HPE “Ukhta State Technical University”, Ukhta, the Russian Federation
At present due to the increase of heavy oils and bitumen deposits share in world reserves and because of intensive development of light oils the need arises to extract these deposits by applying high performance technologies. One of those is the steam-assisted gravity drainage technology (SAGDT). The main advantage is its applicability in a wide range of oil viscosities and formation thickness. However, significant difficulties may accompany nonuniform deposits–conditioned implementing of SAGDT. The given work reviews the preceding studies of impacts on the SAGDT process caused by formation anisotropy and inhomogeneous interlayers. The presence of significantly extended impermeable interlayers may strongly affect recovery rates during operating horizontal wells by applying SAGDT technology. The technology efficiency in the process of heavy oils and bitumen recovery will mostly depend on the balanced distribution of the steam injected along the entire well length and normal steam chamber formation, in other words, in the form of “reversed triangular”. Next in the work by means of numerical simulation has been investigated the efficiency of SAGDT technology implementation in the context of Lyael area of Yarega field. In order to achieve the objective it has been studied how deposit recovery ratio is affected by various impermeable interlayers. The problem to be solved hydrodynamic model of Lyael area site with average geological parameters was created. The numerical calculations of technological parameters were performed in the presence of various impermeable interlayers when implementing the SAGDT technology.
- Butler R.M. Thermal Recovery of Oil and Bitumen, vol. 7. New Jersey USA, Prentice Hall, 1991. pp. 285-358.
- Butler R. M., Stephens D. J. The Gravity Drainage of Steam-heated Heavy Oil to Parallel Horizontal Wells // Journal of Canadian Petroleum Technology. April-June 1981. Volume 20, № 02, pp. 90-96.
- Chen Q., Gerritsen M. G., Kovscek A. R. Effects of Reservoir Heterogeneities on the Steam-Assisted Gravity-Drainage Process // SPE Reservoir Evaluation & Engineering. October 2008. Volume 11, № 05, pp. 921 – 932.
- Kamath V. A., Sinha S., Hatzignatiou D. G. Simulation Study of Steam-Assisted Gravity Drainage Process in Ugnu Tar Sand Reservoir // SPE Western Regional Meeting. Anchorage, Alaska, U.S.A., 26-28 May 1993.
- Kisman K. E., Yeung K. C. Numerical Study of the SAGD Process in the Burnt Lake Oil Sands Lease // SPE International Heavy Oil Symposium. Calgary, Alberta, Canada, 19-21 June 1995.
- Sharma B. С. [at al.] A Simulation Study of Novel Thermal Recovery Methods in the Ugnu Tar Sand Reservoir, North Slope, Alaska // SPE Western Regional/AAPG Pacific Section Joint Meeting. Anchorage, Alaska, U.S.A., 20-22 May 2002.
- Yang G., Butler R.M. Effects of reservoir heterogeneities on heavy oil recovery by steam-assisted gravity drainage // Journal of Canadian Petroleum Technology. October 1992, Volume 31. № 08, pp. 37-43.
- Ruzin L.M., Chuprov I.F. Technological principles of the development of deposits of abnormally viscous oil and bitumen. Ukhta, 2007. 244 p. [in Russian].
anisotropy; heavy oil; heterogeneous deposit; impermeable interlayers; numerical simulation; steam assisted gravity drainage; Yarega field; анизотропия; высоковязкая нефть; неоднородная залежь; непроницаемые прослои; термогравитационного дренирования пласта; численное моделирование; Ярегское месторождение DOI 10.17122/ogbus-2015-3-143-161 References to this article (GOST) Zhangabylov R.A. STUDY OF STEAM-ASSISTED GRAVITY DRAINAGE TECHNOLOGY EFFICIENCY IN CONDITIONS OF HETEROGENEOUS HEAVY OIL DEPOSITS // Electronic scientific journal "Oil and Gas Business". 2015. №3. P.143-161. URL: http://ogbus.ru/issues/3_2015/ogbus_3_2015_p143-161_ZhangabylovRA_ru_en.pdf