Evaluation of Water Drilling Problems in a Transition Aquifer, a Case Study of Ogwashi Asaba Formation And Benin Formational Boundaries Within Orlu Area, Imo Sedimentary Basin Se Nigeria by Onunkwo A.A , Ikoro D.O , Israel H.O , Scientific Research Journal (Scirj), Volume IV, Issue XI, November 2016 Edition

Scirj Volume IV, Issue XI, November 2016 Edition
ISSN: 2201-2796

Evaluation of Water Drilling Problems in a Transition Aquifer, a Case Study of Ogwashi Asaba Formation And Benin Formational Boundaries Within Orlu Area, Imo Sedimentary Basin Se Nigeria

Onunkwo A.A , Ikoro D.O , Israel H.O

Abstract: Aquifer identification problems in a transition environment have been studied with the aim of evaluating the major causes of water borehole drilling failures of transition environment. Vertical electrical sounding principles were employed in probing the vertical lithology of the areas lying within the transition Environment of Ogwashi Asaba and Benin Formation. The major equipment used in this operation is Scintex R Sp- 6 and signal average system SAS 300 Terrameter. The result shows that the lithological arrangement is chaotic and cannot be correlated. The borehole drill log and electrical resistivity survey of the underlying lithology doesn’t correspond because of the inter fingers of sediments which could not be detected by VES survey. This leads to error in total drill depth estimation. Most of the aquifers at the deep levels have no shale base making the total drill depth estimation a guess. A water bore hole in a single location may have aquifer at different levels of the well, therefore, multiple screens are ideal. Hand dug well is possible in some areas. No bore hole in the area should terminate before 90m (270ft). It was discovered that trilinear VES survey should be employed in the area. Where water bore hole drilling is difficult, hand dug well should be installed if possible. The VES report of one area should not be used for another, because the well cutting of any borehole does not match its vertical electrical resistivity results.

Reference this Paper: Evaluation of Water Drilling Problems in a Transition Aquifer, a Case Study of Ogwashi Asaba Formation And Benin Formational Boundaries Within Orlu Area, Imo Sedimentary Basin Se Nigeria by Onunkwo A.A , Ikoro D.O , Israel H.O published at: "Scientific Research Journal (Scirj), Volume IV, Issue XI, November 2016 Edition, Page 46-64 ".

Search Terms: Transition aquifer. Imo Sedimentary basin, Orlu SE Nigeria, underground water bore hole

[Read Research Paper] [Full Screen]