Integration of Formation Evaluation Results with Core Data and it Impact on Production in Marrat Formation
Hamad F. Al-Hamad1*, Heyam Al-Ammar2, Hanan Salem2, and Fawzia Abdullah1
The Marrat Formation has recently been established as a major hydrocarbon reservoir in northern Kuwait. Substantial commercial reserves have been estimated from this Middle Jurassic formation. The formation is composed of a sequence of dense micritic limestone with secondary wackestones, packstones and frequent interbeds with anhydrite, dolomite and rare shale. This presentation shows the results of formation evaluation of complex lithology integrated with core data to obtain the most suitable testing intervals in Marrat Formation. The study was based on the integration of log analysis with conventional core porosity and permeability analyses results, in addition to fracture characterization from core and borehole image data from two wells drilled in Raudhatain fields Three main Marrat subdivisions were identified: Upper Marrat, Middle Marrat and Lower Marrat. The main reservoir in the formation is the Middle Marrat, which has been subdivided into three units, from top: A, B and C. The subdivision of Middle Marrat was based on presence of fractures, porosity distributions and lithology. Due to the good porosity development and presence of massive fractures, only the B and C units were recommended for testing.
AAPG Search and Discovery Article #90077©2008 GEO 2008 Middle East Conference and Exhibition, Manama, Bahrain