Computation of cementation factor and saturation exponent for selected oil fields in southern Iraq
| Autor: | Amna M. Handhal, Abdulhuseein N. Shnawa Al-Atabi Al-Atabi, Fadia Waleed Majeed Majeed |
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| Rok vydání: | 2021 |
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| Zdroj: | Journal of Petroleum Research and Studies. 8:113-131 |
| ISSN: | 2710-1096 2220-5381 |
| Popis: | This study aims to calculate cementation factor and water saturation exponent for fourdifferent lithological formations from different oil fields in south of Iraq and compare theresults with typical values of these reservoir parameters. The formations that being selectedfor this study are: Yamama Formation in West Quran (WQ-60 well), Zubair Formation insouth Rumaila (Ru-64 well), Nahr Umr Formation in Luhais oil field (Lu-5 well), andMishrif Formation in Tuba oil field (Tu-4 well). The cementation factor for clasticformations (Zubair and Nuhr Umr) was calculated via Wyllie (1949) and He (2005)empirical equations. It is found that the value of this parameter is estimated to be 1.1 and1.90 m for the Zubair formation using Wyllie equation and is equal to 2.4 and 1.6 m forNahr Umr Formation according to the He equation. For the carbonate formations (Yamamaand Mishrif), the cementation factor was estimated using Borai (1987) and Focke andMunn (1987) equations. This parameter was equal to 1.3 for both formations according toFocke and Munn (1978) and estimated to be 1.95 and 1.98 for Yamama and Mishrifformations according to equation developed by the Borai. The calculated saturationexponent was 2.5, 2, 2.21 and 0.5 in Zubair, Nahr Umr, Mishrif, and Yamama formations,respectively. The new calculated values were then applied in the Archi equation to estimatewater saturation. The obtained results were compared with that calculated in laboratory(from core). Results showed that Wyille equation is better than the He equation. The finalresult confirmed that Wyllie equation is more accurate than He equation for calculatingcementation factor in sandstone, while Borai equation was more accurate than Focke andMunn equations for the cementation factor in limestone rocks. |
| Databáze: | OpenAIRE |
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