Abstract
The synthesis of geological and petroleum research undertaken in the coastal Sedimentary Basin of the Pointe-Noire region enabled the establishment of a lithostratigraphic scale. It has been observed that the order in which the series observed in outcrop and those encountered by deep wells succeed each other has allowed a value to be given to this relative scale. The study area corresponds to a longitudinal tectonic accident, fault or flexure. It belongs to the Cretaceous and Tertiary coastal sedimentary basin covered by the Plio-Pleistocene age formations (series of circuses), formed of highly permeable sands comprising multiple resistant horizons that store large bodies of water whose reserves are considered very important. Hydrographic network is composed of four main basins with a mediocre size. The quality of this groundwater is considered to be satisfactory for household consumption, but the sustainable management of these reserves requires constant checks on their quality as well as on the level of the reserves. All these resources put the agglomeration of Pointe-Noire close to large exploitable water reserves that meet the need for drinking water, even if, on the whole, the agglomeration is still experiencing many difficulties in terms of its drinking water supply.
Highlights
For more than two decades, harnessing the potential of water resources has been one of the priorities in the economic and social development plans of Pointe Noire/Republic of the Congo region
The synthesis of geological and petroleum research undertaken in the coastal Sedimentary Basin of the Pointe-Noire region enabled the establishment of a lithostratigraphic scale
Based on the synthesis of existing work and field observations, The Pointe-Noire region can be said to belong to the coastal Sedimentary Basin of Cretaceous and tertiary age, covered by formations of Plio-Pleistocene ages other than the cirques series, formed by very permeable sands with multiple resistant horizons
Summary
For more than two decades, harnessing the potential of water resources has been one of the priorities in the economic and social development plans of Pointe Noire/Republic of the Congo region. The Descriptions provided in very brief logs may lead to misinterpretation in the layout of geological formations In this context, the management of the basin’s water resources requires a better knowledge of the characteristics of the different hydro systems and an analysis of the different facies of the geological scale that establish the contact between the sedimentary deposits and the Precambrian basement of the PointeNoire region. The management of the basin’s water resources requires a better knowledge of the characteristics of the different hydro systems and an analysis of the different facies of the geological scale that establish the contact between the sedimentary deposits and the Precambrian basement of the PointeNoire region This knowledge is essential in order to better orient the exploitation and to take into account the necessary protective measures for the preservation of this important resource. The objectives of this study are 1) to establish a lithostratigraphic scale based on geological and petroleum research conducted in the coastal sedimentary basin of the Pointe-Noire region, 2) to describe the potential water resources of this region
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