Characterization of Flow Units in Sandstone Reservoirs: La Cira Field, Colombia, South America J.A. Canas; J.A. Canas Ecopetrol Search for other works by this author on: This Site Google Scholar Z.A. Malik; Z.A. Malik Texas A&M U Search for other works by this author on: This Site Google Scholar C.H. Wu C.H. Wu Texas A&M U Search for other works by this author on: This Site Google Scholar Paper presented at the Permian Basin Oil and Gas Recovery Conference, Midland, Texas, March 1994. Paper Number: SPE-27732-MS https://doi.org/10.2118/27732-MS Published: March 16 1994 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Canas, J.A., Malik, Z.A., and C.H. Wu. "Characterization of Flow Units in Sandstone Reservoirs: La Cira Field, Colombia, South America." Paper presented at the Permian Basin Oil and Gas Recovery Conference, Midland, Texas, March 1994. doi: https://doi.org/10.2118/27732-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Permian Basin Oil and Gas Recovery Conference Search Advanced Search SPE MembersAbstractThis paper presents a new and practical methodology to identify the flow units in a mappable geological formation. This approach uses Interwell Flow Capacity Index (IFCI) to describe the flow unit. IFCI is defined as the ratio of actual flow rates (production or injection) in any two wells in a producing unit, with the higher fluid flow rate of the two wells in the denominator. The presented approach uses core, log and production-injection data to describe the variations in reservoir connectivity. The flow units are identified and described by the use of IFCI. A flow unit is identified by the similarities between IFCI's calculated by using petrophysical and production-injection data. A Colombian (South America) sandstone, La Cira Field "C1C unit", is used to illustrate the application of IFCI to identify and describe flow units.IntroductionUnderstanding the variations in reservoir connectivity is the key to successful implementation of improved oil recovery programs. The reservoir connectivity modeling is the basis for defining a flow unit model. A flow unit model incorporates all pertinent detailed geological. petrophysical and engineering informations available. This model provides a reservoir description that retains the complexities of reservoir architecture and variation in reservoir parameters. The flow unit model is useful in predicting production performance of secondary and tertiary recovery processes.A flow unit is defined as a lateral and vertical continuity for flow of fluids through a genetic or geological unit. Flow units are related to genetic units distribution, but do not necessarily coincide with facies boundaries. Therefore, flow units may not be areally contiguous.This paper presents a new and practical methodology to identify and describe flow units within mappable geological formations. This methodology utilizes core, log and production-injection data to describe the variations in reservoir connectivity. A flow unit is described by the use of Interwell Flow Capacity Index (IFCI).A Colombian (South America) sandstone, La Cira Field "C Zone", is used to illustrate the application of the IFCI. The C zone is a low to moderate permeability, fluvial sandstone reservoir. This zone produces from the Mugrosa Formation of Eocene-Oligocene age. An area of about 1750 acres was selected for detailed study. The study area has 70 producers and 29 injectors.In the C zone 16 major genetic units are distinguished on the basis of grain size, texture, sedimentary structures and location.P. 883^ Keywords: south america, ifci, upstream oil & gas, geologic modeling, connectivity, reservoir characterization, permeability, flow unit, flow rate, drillstem testing Subjects: Reservoir Characterization, Formation Evaluation & Management, Exploration, development, structural geology, Geologic modeling, Drillstem/well testing This content is only available via PDF. 1994. Society of Petroleum Engineers You can access this article if you purchase or spend a download.