ROCK PHYSICS DIAGNOSTIC AND DENSITY VELOCITY ANALYSIS FOR HYDROCARBON EVIDENCE IN THE NAHR-UMR FORMATION, NASIRIYAH OIL FIELD, SOUTHERN IRAQ
الباحث الأول:
Majid A. Albakr
الباحثين الآخرين:
Ameen A. Al-Shamkhy, Mohammed S. Faisal , Ali K. Jaheed, Najah Abd, Salar Hasan, Sana Hussain Sana and Ansam H. Rasheed7
المجلة:
IRAQI BULLETIN OF GEOLOGY AND MINING
تاريخ النشر:
17 ديسمبر، 2025
مختصر البحث:
Rock physics recently became widely utilized in classifying lithological units for various purposes in geophysics, depending on well-logging and seismic inversion datasets. Nahr Umr Formation is the targeted reflector, which was studied in well NS-1…
Rock physics recently became widely utilized in classifying lithological units for various purposes in geophysics, depending on well-logging and seismic inversion datasets. Nahr Umr Formation is the targeted reflector, which was studied in well NS-1 as one of the most productive oil fields in Iraq, the Nasiriya field, to prove the performance and accuracy of Rock-physics productivities. Six cross plots were extracted and interpreted depending on the units of Density (RHOP) and Neutron (NHPI ) logs, which were used for lithology-predicting of the Nahr Umr Formation, which consists mainly of porous sandstone, dolomite, clay, and shale. The challenge of locating the most profitable layer in hydrocarbon production was achieved using rock physics procedures to classify lithologic units of the Nahr Umr Formation. The matching between the results of well logging analysis and hydrocarbon probability for targeted units was extremely good due to the use of more reliable tools. The probability density function (PDF) technique was applied to visualize the space of rock physics in two dimensions, and the density distribution within rock units was prominently clear. Polynomial equation of Nasiriya oil field was extracted for Nahr Umr Formation, and it was equivalent to the standard equation of Nafe Drake according to density/ velocity curve readings.
