By March 2018, a total of 117 wells had been drilled, including one horizontal well 116 wells have been put into operation, of which 21 wells are producing as cold, 82 wells for steam stimulation and 13 wells for steam flooding. The oil field put into production in 2010 with cold production and cyclic steam stimulation. FNE has conventional heavy oil in both Aradaiba and Bentiu, and Bentiu reservoir has a relatively good quality with porosity ranging from 17 to 40%, permeability ranging from 100 to 11000 mD and viscosity of about 840 cP (Elbaloula et al. The average pressure is 576 psi and the average temperature is 43.9 ☌. The reservoir of FNE oil field is characterized by normal temperature and pressure system at 529 m depth. Figure 1 shows the location of FNE.įNE oil field is considered as heavy oil field and it has shallow reservoir, and Bentiu reservoir is affected by strong bottom water. There are three proved hydrocarbon-bearing formations (Aradaiba, Bentiu and AG), among which Bentiu is the main pay zone. Types of thermal EORįNE field is located about 9 km away from the North East of Fula field in Fula Sub-basin in Sudan it is structurally subdivided into three main blocks, which are FNE-1, FNE-3 and FNE-N.
Within the USA, thermal methods account for around 40% of EOR production (Prats 1982). Thermal methods of EOR have been highly successful in the USA, Canada, Venezuela and Indonesia and have also been used in China and Brazil. These methods are typically employed in relatively shallow oil wells with higher viscosity such as tar sands and heavy oil. They have the ability to lower the viscosity of the oil and thus increase the mobility ratio. They are best suited for heavy oils (10–20° API) and tar sands (≤ 10° API). Thermal methods have been tested since 1950s, and they are the most advanced among EOR methods, as far as field experience and technology are concerned. Thermal methods of EOR entail the application of heat to the oil well. Thermal enhanced oil recovery (TEOR) is a family of tertiary processes defined as “any process in which heat is introduced intentionally into a subsurface accumulation of organic compounds for the purpose of recovering fuels through well.” The results show that the optimum steam flooding parameters for this area are steam injection temperature of 270 ☌, with 5–7 MPa injection pressure, steam injection quality of more than 0.6 and steam injection rate of 1.6 m 3/day/ha/m, and the final recovery ratio will reach 32.3%.
The best well space and development program are optimized this paper supplies a theoretical foundation for the next step of steam flooding in the whole field.
#Steam download stopping 2016 simulator
Advanced thermal enhanced oil recovery simulator has been used to build the model of 279, 888 cells to design and optimize steam flooding pilot area for this field. In this paper, through comprehensive analysis of the geological properties of reservoir, production dynamics of single well and cement quality of wellbore, the steam flooding pilot test area under different well groups is screened out. As of March 2018, the oil field has been fully commissioned in steam stimulation for 3 years and the water cut rises rapidly and the oil rate declines seriously.
Fula North East oil field is a massive edge and bottom water reservoir with good properties and high viscosity of crude oil. Steam flooding is a method of injecting steam to heat the oil and decrease its viscosity so that it will be easy to flow from injector to producer.
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