Estimation of hydraulic parameters and porosity from geoelectrical properties for fractured rock aquifer in middle Dammam formation at Bahr al-Najaf Basin, Iraq
Other Title(s)
تخمين المعاملات الهيدروليكية و المسامية من الصفات الجيوكهربائية للخزان الجوفي الحجري المتكسر لتكوين الدمّام في حوض بحر النجف، وسط العراق
Joint Authors
al-Shammari, Ala Nasir
al-Yasi, Amin Ibrahim Hassun Hamzah
al-Fayyd, Jasim Muhammad Thabit Ibrahim
Source
Iraqi Bulletin of Geology and Mining
Issue
Vol. 10, Issue 2 (31 Aug. 2014), pp.41-57, 17 p.
Publisher
Ministry of Industry and Minerals Iraqi Geological Survey
Publication Date
2014-08-31
Country of Publication
Iraq
No. of Pages
17
Main Subjects
Earth Sciences, Water and Environment
Abstract EN
This study tries to examine the correlation between the hydraulic and geoelectrical parameters in an appropriate way, to construct empirical relationship at sites in Bahr Al-Najaf basin in the middle part of Iraq.
It is a first attempt of estimating mathematically the effective porosity, hydraulic conductivity, and transmissivity of a confined and anisotropic aquifer of Middle Dammam formation.
This aquifer is distinguished with the presence of fractures and paleo karst features of Carbonate rocks.
Sixteen of (VES) Schlumberger array using a maximum current electrode separation of (1000) m are conducted near existed wells and boreholes (with pumping test data).
The field (VES) data is interpreted, and values of geoelectrical parameters as layer resistivity and thickness, in addition to Dar Zarrouk parameters are determined.
Correlating Dar Zarrouk parameters with hydraulic conductivity and transmissivity (derived from pumping test analyses) at nine positions nearby selected boreholes is made.
Then representing the results as several graphical relationships of nonlinear curves with polynomial equations of second order and show very good Reliability (R2 ).
Directly proportional relations between longitudinal conductance with both; the hydraulic conductivity of R2 = 0.893 and the transmissivity of R2 = 0.868 are more conformable for such aquifer of average resistivity (70) Ωm.
Mathematically estimated values of hydraulic conductivity, transmissivity and those estimated by pumping test analyses are compared by means of histogram figures.
The small error ratios (RMS %) as (5.53) and (6.32) between the average values respectively, verify the validity of this methodology to be applied in other sites of similar characteristics.
Average effective porosity (secondary type) and water saturation of Middle Dammam aquifer are geophysically computed by Archie's equation as (22%) and (0.9) respectively.
These results are close to the typical porosity of saturated carbonate rocks as (27%), and agree with the prevail knowledge that the studied area is a discharge zone for Al-Shbecha hydrogeological basin.
American Psychological Association (APA)
al-Fayyd, Jasim Muhammad Thabit Ibrahim& al-Yasi, Amin Ibrahim Hassun Hamzah& al-Shammari, Ala Nasir. 2014. Estimation of hydraulic parameters and porosity from geoelectrical properties for fractured rock aquifer in middle Dammam formation at Bahr al-Najaf Basin, Iraq. Iraqi Bulletin of Geology and Mining،Vol. 10, no. 2, pp.41-57.
https://search.emarefa.net/detail/BIM-748128
Modern Language Association (MLA)
al-Yasi, Amin Ibrahim Hassun Hamzah…[et al.]. Estimation of hydraulic parameters and porosity from geoelectrical properties for fractured rock aquifer in middle Dammam formation at Bahr al-Najaf Basin, Iraq. Iraqi Bulletin of Geology and Mining Vol. 10, no. 2 (2014), pp.41-57.
https://search.emarefa.net/detail/BIM-748128
American Medical Association (AMA)
al-Fayyd, Jasim Muhammad Thabit Ibrahim& al-Yasi, Amin Ibrahim Hassun Hamzah& al-Shammari, Ala Nasir. Estimation of hydraulic parameters and porosity from geoelectrical properties for fractured rock aquifer in middle Dammam formation at Bahr al-Najaf Basin, Iraq. Iraqi Bulletin of Geology and Mining. 2014. Vol. 10, no. 2, pp.41-57.
https://search.emarefa.net/detail/BIM-748128
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 56-55
Record ID
BIM-748128