Journal issues: 3/2015
Language: (RU, EN)
30 June, 2015
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.
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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