The Lagunilla Inferior is located on the eastern part of Lake Maracaibo. It covers an area of around 300 km², with an original oil in place of 6,900 MMSTB and with a total of 1051 wells. The overall recovery factor is around 20% and the current oil field production rate is 30,000 STB/day.

To improve the recovery factor during the 70 years of field production life, four water injection projects in different areas of the reservoir have been implemented. In a recent effort to improve the recovery factor in a selected part of the reservoir with higher residual oil saturation but very low reservoir pressures (300-450 psia), an integrated reservoir study was conducted. In this study the water injection with vertical wells were compared with multilateral well technology by using a numerical simulation model. The water flooding scheme with multilateral wells as injectors and producers shows in this study the highest recovery factor, the best economics indicators and the lowest operational activities compared to the vertical well concepts.

In this paper the results of different pattern concepts and the detailed project planing will be presented. The first phase of the project (drilling of two injection wells and one producing well) will be implemented this year.

You can access this article if you purchase or spend a download.