PriMera Scientific Engineering (ISSN: 2834-2550)

Review Article

Volume 4 Issue 4

A Doomed Reservoir Surprisingly Became a Mature Reservoir with Potential: Water Dump Flooding Case Study in Boca Field

Elias Raul Acosta*, Carlos J Ortega, Gina Vega Riveros, Luis R Molina and Ernesto E Rosales Z

March 20, 2024

DOI : 10.56831/PSEN-04-119


Water Dump Flooding is less well known for revitalizing mature fields. However, in the Boca Field, specifically Reservoir 95 Y-102, this is exactly what occurred. A periodic review of this mature field suggested abandoning the only producing well in this reservoir, well X-3, because an adjacent well, X-6, located above the dip was known to produce a 99% water cut.

Although other wells were produced in the reservoir, only a 12% recovery was achieved. Therefore, an integrated study to re-evaluate the parameters and properties of Reservoir 95 Y-102 began in 2005. During the well analysis, it was found that the water production of well X-6 was the result of the communication behind the casing of the well with the underlying aquifer 101 and not because of the advancement of the oil-water contact, as initially suggested. Recompletion of well X-3 was recommended because an injection process known as dump flooding was underway. In addition, aquifer support for production over the previous seven years strongly indicated that dump flooding would produce the desired production increases.

Under sub-optimal conditions, accidental Water Dump Flooding rejuvenated the producing well, increasing production to more than 300 BOPD with an acceptable water cut of 61%. The steps followed for the analysis and understanding of the process that occurred and how we took advantage of this accidental Dump Flooding raised the production from nearly zero to over 100,000 barrels produced in a single year. This lays the foundation for using Dump Flooding as a production and development strategy for other projects in the area.


  1. Acosta Elias R and Rosales Z Ernesto. “Petrophysical Interpretation Handbook-Petrophysical Model for High irreducible Water Saturation Reservoir in Oficina Formation”. PDVSA EyP. San Tome (2006).
  2. Alberta Research Coucil (ARC). “ARC’s Initiatives in Improved Waterflooding” Presentation (2005).
  3. Al-Siddiqi Ahmed and Dawe Richard. “A review of Petroleum Engineering Aspects of Qatar’s Oil and Gas”. Engineering Journal of the University of Qatar 11 (1998): 11-45.
  4. Bait Boniface. “Geology of Kinabalu field and its water injection scheme”. Geological Society of Malaysia, Bulletin 47 (2003): 165-179.
  5. El-Feky SA. “Dumpflood predictive model is developed and evaluated”. Oil Gas Journal 85 (1987).
  6. Interstate Oil and Gas Compact Commission and ALL Consulting. “A Guide to Practical Management of Produced Water from Onshore Oil and Gas Operations in the United States” US Department of Energy. National Petroleum Technology Office (2006).
  7. Kim A and Crespo F. “Excessive Water Production: Causes & Diagnostics” (2013).
  8. Molina LR. “Validation of the Geological Model of I5 sand, reservoir SG102 of Boca field, San Tome District, Anzoategui state”. Universidad de Oriente. Ciudad Bolivar (2008).
  9. Nguyen G and Athichanagorn S. “Water Dumpflood Alternating Gas Injection from Underlying Aquifer”. International Journal of Earth Sciences and Engineering (2015): 256-261.
  10. Ofei TN and Amorin R. “Theoretical Analysis of Gravity-controlled Waterfloods”. Research Journal of Applied Sciences, Engineering and Technology (2011): 369-376.
  11. Petroven-Bras SA. y Rosales Zambrano Ingeniería (RZI). “Reservoir I6U 11M-301 Integrated Study. Acema 300 Field”. Leona (2008).
  12. Rawding Jon, Al-Matar Badar and Konopczynski Michael. “Application of Intelligent Well Completion for Controlled Dumpflood in West Kuwait”. Intelligent Energy Conference and Exhibition. Amsterdam, The Netherlands (2008).
  13. Shizawi Wafa., et al. “Enhancement of Oil Recovery through “Dump-flood” Water Injection Concept in Satellite Field”. SPE Middle East Oil and Gas Show and Conference. Manama, Bahrain (2011): SPE-142361.
  14. Stuebinger LA and Elphingstone GM. “Multipurpose Wells: Downhole Oil/Water Separation in the Future”. SPE Production & Facilities 15.3 (2000): 191-195.
  15. Villarroel AJ., et al. “Methodology of Feasibility Study on Pilot Test for Dump Flood Completion System”. SPE Latin America and Caribbean Petroleum Engineering Conference. Quito, Equador (2015): SPE-177039-MS.
  16. Witherspoon Paul. “Some Important Aspects of Water Flooding in Illinois” State Geological Survey. Circular No. 180. Urbana, Illinois. United States of América (1952).