Petrophysical and Geological Study of Al-Nafoora Oil Field, Sirt Basin

Abstract

Through the study of the oil field based on the geological and petrophysical data, the following was observed: obtained from the operation company. The reservoir in this field is pre-upper Cretaceous "B" sand formation, and the depositional environment is a shallow marine environment located in the upper Cretaceous; the lithology structure of the reservoir is shaly sand. Based on the petrophysical information, the main reservoir properties are represented in porosity, volume of shale, water saturation, and net pay thickness. ....etc. The final observation and interpretation results of the three wells are as follows: Well Y1-51 results; The main type of lithology over 8.5" drilled reservoir section was mainly shaly sand reservoir with good reservoir properties. The average of the pay zone of PUC B sand section was as follows: average PHIỂ ranged from 13.8%, Volume of clay 7.3%, and water saturation about 18.8%. Well Y2-51 results: The main type of lithology over 8.5" drilled reservoir section was mainly shaly sand reservoir with good reservoir properties. The average of the pay zone of PUC B sand section was as follows: average PHIE 8.5%, Volume of clay about 0.05%, and water saturation is 24.8%. Well Y3-51 results: The main type of lithology over 8.5" drilled reservoir section was mainly shaly sand reservoir with good reservoir properties. The average of pay zone olroc sand section was as follows: PHIE is 13 3%, Volume of clay is 10.3%, and water saturation is 27.8%.