Flow Differential Analysis of VAPEX Process in Vuggy HorizontalFractured Reservoirs, A Visual Study

In this laboratory investigation, we attempted to analysis the production rate of vapor extractionprocess versus visual observations of sand-packed model in a vuggy horizontal fractured system toassess one of the fracture characters. The first objective of this paper is to introduce the differentialflow analysis as a new method for surveying the in-situ phenomenon in experimental models. Theother objective is to study the role of vuggy horizontal fractures on the production rate and tocategorize of enhancement functions of production as visual observation in vapor extractionprocess. The results demonstrated that the differential flow analysis is compatible with the visualobservations. Both differential flow analysis and visual observations revealed that new chamberformation, overtone chamber formation, expansion of chamber wings, chamber fingering andoccasionally breakthrough formation are the most important functions of recovery enhancement.The relative magnitudes of these functions were calculated by integration of differential flow curveto show the relative importance of each function

Keywords:

Vapor Extraction , Vug , Horizontal Fracture , Differential Flow Analysis