Abstract

    The petrophysical analysis plays a significant role in determining the physical properties of reservoir rocks such as volume of shale, porosity and water saturation which in turn are  key factors in identifying the hydrocarbon zone possibilities (net pay). The study was conducted on Belhedan field which located in Sirt Basin. The targeted aria was the Gargaf formation, on which five wells were utilized for the investigation. The logging data studied comprises of gamma ray to determine volume of shale, density log, neutron log, whereas for porosity- and water saturation determination sonic log and resistivity were applied respectively. The results and data derived from the different logs of the current research work were analyzed by using Techlog Software2015 application. Based on the results derived from the software mentioned above the volume of shale for the five wells was calculated to be between (6.8-25.4 %), whereas average porosity was found to be between (8.5- 17%). Finally, water saturation and net pay thickness were computed to be  between (9.6- 49.6%)  and (18.5- 183.5 ft) respectively.

Abstract  

In some engineering applications soil stiffness only could not be a reliable parameter in accordance with specific standardizations especially, when

dealing with dynamic loading. In other words, foundation soil should be altered regarding its ductility in order to prevent sudden damage due to brittleness. Plenty of researchers have studied the effect of multifilament polypropylene fibers on soil reinforcement. Besides, the alkaline activation method has been adapted to alter the strength properties of soft soil. Furthermore, in a cutting edge method, alkaline activation of soft soil, using fly ash and Potassium hydroxide, coupled with soil reinforcement was adapted to change the post-peak behavior of soft soil. The goal of this novel technique is to increase the ultimate strength and to enhance the failure mode. In this research work alkali activated kaolin soil and alkali-activated reinforced kaolin soil were cured for 28 and 90 days respectively. Compressive stress tests were conducted on both mixtures, namely, SF40 ( Soil +40% fly ash) and SFR0.75 ( Soil+ 39.7% fly ash + 0.75% PP fibers) samples. Results drawn from the tests revealed a drastic increase in Compressive strength for SF40 samples cured for 28 and 90 days, namely, 3680 kPa and 18500 kPa, respectively. Whereas, the strength recorded by the control sample was only 190 kPa. Though a sharp drop was seen when approaching failure. The addition of reinforcing Polypropylene fibers brought about a drastic enhancement in failure mode for both of curing regimes.