Reservoir Characterization of the Early Cretaceous Sarmord and Garagu formations from Atrush-1 and Mangesh-1 Wells, Kurdistan Region, Iraq

Abstract
Petrophysical properties of the Early Cretaceous Sarmord and Garagu formations\r\nfrom the Atrush and Sarsang Blocks in the Kurdistan Region are studied.\r\nThese formations are generally composed of limestones and dolomitic\r\nlimestones interbedded with thin to medium layers of yellowish-gray marl\r\n(calcareous mudstone). The current study shows that the average shale volume\r\nin the Sarmord and Garage formations is between 16% and 20%. In\r\nAtrush-1 Well, the average porosity ratio of the Sarmord and Garagu formations\r\nis fair to good (15% and 11%, respectively). However, in Mangesh-1\r\nWell, the porosity value is poor; it is around 4% on average. Generally, most\r\nof the hydrocarbons that have been observed within the pore spaces are residual\r\noil type in Atrush-1 Well and movable hydrocarbon type in Mangesh-1\r\nWell. In Atrush-1 Well, out of 362 m thickness of both formations, only 180\r\nm is considered to be a pay zone; whereas, the pay zone is just around 8.0 m\r\nthick out of 347 m of the total thickness. According to the calculated porosity\r\nvalues, the Garagu and Sarmord formations are not considered as good reservoirs\r\nin the studied wells, with the exception of Atrush-1 Well where the\r\nSarmord Formation has fair potential reservoir characteristics.

Author
Falah Kh. Al-Jaboury

DOI
DOI: 10.4236/ojg.2021.1110027

Publisher
Open Journal of Geology

ISSN
ISSN Online: 2161-7589 ISSN Print: 2161-7570

Publish Date: