University of Khartoum

Optimization of cyclic steam stimulation (CSS) using (CMG) software to increase the recovery factor

Optimization of cyclic steam stimulation (CSS) using (CMG) software to increase the recovery factor

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Title: Optimization of cyclic steam stimulation (CSS) using (CMG) software to increase the recovery factor
Author: Ali, Hilal Mamoun Khalid; Hassan, Mohammed Ali Abdeen; Alkhider, Moayad Damra Mohammed
Abstract: While searching to optimize the production rate dealing with a treatment of heavy oil crude in FNE, Fula North East “FNE” is a perfect nominee to this thermal recovery according to its high density “0.95” and high viscosity “727.33cp”. Since Cyclic Steam Stimulation (C.S.S) is one of the most proper and significant thermal recovery process. The prosperity of this technique is defined by a number of drive mechanisms like; viscosity reduction which is the most important one and the main goal of utilizing C.S.S., the expansion of gas, wettability, etc... C.S.S. is applied to make the intended sector of the reservoir adjacent the wellbore being hot to heat up that region by recurrent and chronic injection of steam. In this process, a single well (horizontal or vertical) is fixed to act as an injector and producer at the same time, and by a collection of three phases; injection, soak and production, a cycle of C.S.S is formed and this cycle is frequently done on the single well to improve the rate of production. To heat up the crude in the vicinity of the reservoir, injection of steam into the well is made for a while to reach a degree of temperature at which the oil can mobile and easily flows when adequacy quantity of steam has been applied. After that, at the second phase stage which is called the soaking phase, the steam is left to soak for a while by closing the well for a short time (a period not exceeding few days). The steam heats the largest possible area in the reservoir followed by the reduction of oil viscosity. Finally as a last step in a cycle, the well is opened again and begins to produce naturally by drive mechanisms or artificially by lifting processes. This final stage is called production stage. When the reservoir temperature fall and the oil rate reached its peak then reduced, the old cycle of C.S.S. is applied again by making a new cycle by repeating the same steps of the previous cycle by a another amount of steam until reaching a commercial production level
URI: http://khartoumspace.uofk.edu/123456789/16554
Date: 2015


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