Abstract
This study is attentive on of Petrophysical properties of the Mamuniyat reservoir sandstone in I-Oil Field -NC186 which located in Murzuq Basin which is containing mainly sandstone with litter shale layer using well logging data as (Gamma Ray Log ,Resistivity Log , Neutron Log and Density Log). and using new software Techlog software and surfer software .the Mamuniyat reservoir sandstone which represents the target reservoir producing oil from wells in I Oil Field located in the Concession 186 . the petrophysical analysis of the reservoir properties is an important to evaluate the reservoir reserve assessment using well logs data recorded of select six wells (I1-186,I2-NC186 ,I3-NC186,I4-NC186,I5-NC186 and I6-NC186) over studied reservoir for by using well log data only such as and using new software techlog software 2015 and surfer software for mapping , the logs were using in this study the results show Mamuniyat reservoir sand stone has good quality reservoir ,where the porosity is about15 % , the net pay thickness is about 43.5 feet and ,water saturation is up to 39.3 %. the initial oil in place was calculated using the volumetric method equal to 949,29 MMSTB, where the recoverable reserve is 30377.1MMSTB