Tsar Philip

Tsar Philip

Petroleum Engineer

National Oil Corporation of Kenya

Tsar Philip is currently a Petroleum Engineer with National Oil Corporation of Kenya (NOC). He pursued his master’s degree in Petroleum & Well Engineering from Curtin University, Perth, Western Australia. He had a brief stint with Kenya Electricity Generating Company Ltd. as an exploration geophysicist before joining National Oil Corporation of Kenya as a petroleum geophysicist in the year 2009. He holds a Bachelor’s degree in Geophysics.



SESSION 21:  Screening of Enhanced Oil Recovery Methods - Pilot Study Of Lokichar Basin, Tertiary Rift Kenya

Numerous oil reservoirs which have been in production for many years are being reviewed to assess options for increasing the ultimate oil recovery. The task includes the determination of the volume and location of mobile remaining oil and subsequently the technical and economic assessment of methods to recover this oil. Oil production by Enhanced Oil Recovery (EOR) concept has drawn great attention in the petroleum industry because of their high potential for recovering more oil from depleted reservoirs with conventional production methods. In the past two decades, extensive works in EOR processes have been conducted, resulting in an increase in the number of EOR projects being conducted and field tested and thus large volume of publications. 

The large capital investment associated with EOR methods, high technical sensitivity, the complexity and uncertainty of the process performance, and low and unpredictable crude oil prices, underpins proper selection of an EOR method necessary for good decision making. The technical selection of an appropriate EOR method for a given reservoir can be made based on the rock and fluid properties, and also considering mechanisms governing the EOR processes. However, the process performance of a particular design and the costs associated with it should be predicted before a decision can be made to invest large amount of money to conduct such process in the reservoir.

In the past, studies have been done on the technical screening of EOR processes. Manrique et al. described the EOR decision-making procedures using field case examples from Mexico, Canada, Asia, South Africa and USA. They discussed different stages of development and availability. The conclusions indicated that the advantage of flexible decision-making frameworks that adapt to the volume and quality of information by formulating the correct decision problem concentrate the projects/or properties with apparent economic merit. Surguchev et al. suggested a three-level approach to selection of EOR methods. First, their model allows for a fast first-order screening of key EOR applicability methods at given reservoir condition. Then, the model is applied for oil recovery factor (RF) estimation based on the statistical data from projects carried out worldwide.

The aim of this communication is to review different types of EOR methods including chemical flooding (polymer flooding and micellar/polymer, ASP and alkaline flooding), thermal (steam flooding and in-situ combustion), gas injection and infill drilling predictive models. After the review, all of the aforementioned EOR methods were screened for applying in a Kenyan field based on the reservoir characterization. Subsequently, correct percent of any method was observed and the optimal technique/techniques have been (proposed) selected.