The Eocene Sokor1 Formation is proven oil reservoir rocks in the Termit sub-basin. These sandstone intervals are deeply buried, highly heterogeneous in character and characterized by Low Contrast Low Resistivity (LCLR...The Eocene Sokor1 Formation is proven oil reservoir rocks in the Termit sub-basin. These sandstone intervals are deeply buried, highly heterogeneous in character and characterized by Low Contrast Low Resistivity (LCLR) log responses. Petrophysical and quantitative well-based rock physics interpretations were integrated for property estimations, fluid and lithology typing in reservoir characterization. Six (6) reservoir sandstone intervals were identified, delineated and correlated across five (5) wells. The estimated petrophysical properties showed that the Eocene Sokor1 sandstones have averagely good reservoir properties with sand_5 interval exhibiting exceptional reservoir properties. <i><span style="font-family:Verdana;">V</span><sub><span style="font-family:Verdana;">p</span></sub><span style="font-family:Verdana;">/V</span><sub><span style="font-family:Verdana;">s</span></sub></i><span style="font-family:Verdana;"> vs. AI and </span><i><span style="font-family:Verdana;">μρ</span></i><span style="font-family:Verdana;"> vs. </span><i><span style="font-family:Verdana;">λρ</span></i><span style="font-family:Verdana;"> elastic cross-plots color coded with reservoir properties (</span><i><span style="font-family:Verdana;">V</span><sub><span style="font-family:Verdana;">sh</span></sub></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;"><span style="white-space:nowrap;">Φ</span></span></i><span style="font-family:Verdana;">), show distinct and well separated data clusters signifying hydrocarbon bearing sandstones, brine sandstones and shales/mudstones in the 3D crossplot planes with varying seismic elastic property values in each well thereby, enhancing reservoir characterization and providing information’s about the burial history, reservoir quality and property distribution in the sub-basin. The analys</span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">is</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> suggests that, although the reservoir interval has averagely good petrophysical properties in all wells, the seismic elastic crossplots show that these properties are much better distributed in wells 2 and 3 than in wells 4, 5 and 9. Therefore, sand_5 reservoir interval in wells 2 and 3 </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">is</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> likely to be more hydrocarbon bearing and productive than wells 4, 5 and 9 in the sub-basin.</span></span></span>展开更多
文摘The Eocene Sokor1 Formation is proven oil reservoir rocks in the Termit sub-basin. These sandstone intervals are deeply buried, highly heterogeneous in character and characterized by Low Contrast Low Resistivity (LCLR) log responses. Petrophysical and quantitative well-based rock physics interpretations were integrated for property estimations, fluid and lithology typing in reservoir characterization. Six (6) reservoir sandstone intervals were identified, delineated and correlated across five (5) wells. The estimated petrophysical properties showed that the Eocene Sokor1 sandstones have averagely good reservoir properties with sand_5 interval exhibiting exceptional reservoir properties. <i><span style="font-family:Verdana;">V</span><sub><span style="font-family:Verdana;">p</span></sub><span style="font-family:Verdana;">/V</span><sub><span style="font-family:Verdana;">s</span></sub></i><span style="font-family:Verdana;"> vs. AI and </span><i><span style="font-family:Verdana;">μρ</span></i><span style="font-family:Verdana;"> vs. </span><i><span style="font-family:Verdana;">λρ</span></i><span style="font-family:Verdana;"> elastic cross-plots color coded with reservoir properties (</span><i><span style="font-family:Verdana;">V</span><sub><span style="font-family:Verdana;">sh</span></sub></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;"><span style="white-space:nowrap;">Φ</span></span></i><span style="font-family:Verdana;">), show distinct and well separated data clusters signifying hydrocarbon bearing sandstones, brine sandstones and shales/mudstones in the 3D crossplot planes with varying seismic elastic property values in each well thereby, enhancing reservoir characterization and providing information’s about the burial history, reservoir quality and property distribution in the sub-basin. The analys</span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">is</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> suggests that, although the reservoir interval has averagely good petrophysical properties in all wells, the seismic elastic crossplots show that these properties are much better distributed in wells 2 and 3 than in wells 4, 5 and 9. Therefore, sand_5 reservoir interval in wells 2 and 3 </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">is</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> likely to be more hydrocarbon bearing and productive than wells 4, 5 and 9 in the sub-basin.</span></span></span>
