Optimizing Oil Recovery and CO2 Sequestration in Carbonate Reservoirs using Voidage Replacement and Production Balancing Methods

Zakaria Hamdi, Mohammed Ahmed Al-Hadrani, Mahmood Bataee

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Replacement of voidage relates to the method of injecting liquids to replace oil, water and gas inside the reservoir. The technique for voidage replacement is the volume of injected fluids in the barrel over the volume they got produced. Injected liquids may be wasted outside the floodable quantity of the pore in the reservoir during injection, because of many factors such as bad cement in the casing leakage, etc. A Voidage Replacement Ratio of 1.2 is chosen to preserve the replaced fluid pressure of the reservoir. The balancing Production technique relates to the determination of a scheduled rate of production to be accomplished at a particular time. To preserve the reservoir pressure, a production balancing ratio of 1.2 should be selected for a higher production rate that is balanced with the injected fluids. The balancing production approach involves ensuring that the liquids injected fulfil the production ability needed to prevent any reservoir pressure unbalance. The water alternating gas (WAG) method is the technique to improve oil recovery by injecting water to enhance sweep effectiveness. If gas is being injected into this technique, the viscosity of the oil will be reduced, making it convenient for the water to sweep it well into the production wells. WAG-365 case of a 365-day cycling period is the best one to be selected as longer time provides the gas with the opportunity to guarantee two things, sweeping the residual oil that is immobile and trapped inside the tight pores and also dissolving in the oil and reducing its viscosity. CO2 sequestration relates to the subterranean CO2 injection method to prevent the atmosphere from CO2 emissions from burning fossil fuels that subsequently lead to global warming and hazardous climate change. Throughout the WAG method, CO2 is used and injected to be stored as a solution and the quantity of CO2 stored is defined by changing the solubility of the gas.

Original languageEnglish
Title of host publicationSPE Western Regional Meeting 2023
PublisherSociety of Petroleum Engineers
ISBN (Print)9781613999585
Publication statusPublished - 15 May 2023
EventSPE Western Regional Meeting 2023 - Anchorage, United States
Duration: 22 May 202325 May 2023


ConferenceSPE Western Regional Meeting 2023
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Energy Engineering and Power Technology


Dive into the research topics of 'Optimizing Oil Recovery and CO2 Sequestration in Carbonate Reservoirs using Voidage Replacement and Production Balancing Methods'. Together they form a unique fingerprint.

Cite this