Investigation of the Proposed Technique for Improved Oil Recovery from the Depleted Otis-Albert Field in Kansas

Improved Oil Recovery is a groundbreaking technology, considering the new world into which we are emerging. The increase in population has led to the need for more energy to support countries' development, and enhanced oil recovery provides a solution. To promote the growth and advancement of this technology and increase productivity, simulation studies are necessary to evaluate enhanced oil recovery techniques. This paper introduces a comprehensive investigation into the waterflooding improved oil recovery technique. The focus of this study is to assess the performance in the depleted Otis-Albert oil and gas reservoir by building a geological and reservoir model, performing history matching, and running simulations using waterflooding. Additionally, an economic study is carried out to determine the feasibility of implementing this technique. The outcome of the study of the study includes the development of the first fully comprehensive geological and reservoir model for the focused reservoir, which improved original oil and gas in place and estimated ultimate recovery. A CMG model was created by importing the reservoir properties, 233 wells as leases, and other necessary files, such as well trajectory and LAS files. However, deep logs which did not initially exist in the public domain have been collected for the first time; therefore, a better geologic model is generated which improves the reserve estimate of this depleted reservoir. After creating the Baseline model, the resulting OOIP from IMEX was 371,102 (MMSTB), and OGIP was 234,510 (MMMSCF), which is about a 19% and a 1.5% increase from the reported values, respectively. After conducting data analysis of leases that have produced from the Reagan zone, production data was imported to perform history matching until an acceptable match was achieved. Utilizing this new approach, forecasting case was ran from 2022 to 2040 future production predictions and resulted with a cumulative oil production of 8,674,110 bbl. Later, waterflooding was implemented for 10 injectors and 30 producers and was set to produces from 2022 to 2040 and resulting in a cumulative oil production of 8,849,110 bbl. This resulted in a difference of 175000 bbl from Forecasting case, which is about 2% increase. Lastly, an economic analysis was conducted to assess the viability of waterflooding in the Otis-Albert field. The analysis showed that the waterflooding is not economically feasible, with a negative undiscounted net cash flow of $-7.835 MM over the 19-year period.