Publications Scientifiques

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    Seismic Inversion and Lithological Characterization of Reservoirs: Case of Penobscot, Nova Scotia Offshore (Canada)
    (Springer Nature, 2024) Oumarou, Sanda; Mabrouk, Djeddi; Tabod, Tabod Charles; Marcel, Jean; Essi, Jean Marcel Abate; Mebenga, Thibaut Aloys Ekani; Ngos, Simon
    Seismic inversion is a method of processing seismic data to predict different properties of rocks such as density, compressibility, velocity, water saturation, porosity, permeability, and layer thickness. This is how it seems important to us to use seismic inversion to characterize the nature of reservoir rocks. This work uses the different types of seismic inversion that are related to AVO analysis to perform lithological analysis of hydrocarbon reservoirs using 3D seismic data from Penobscot located in offshore Nova Scotia (Canada). These are elastic inversion, acoustic inversion, and inversion by attributes which constitute the methods used. The results allow good discrimination of different layers of hydrocarbon reservoirs using a combination of attributes. Thus, the cross-plotting of the density and the Poisson ratio made it possible to highlight four facies.
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    Seismic attributes in reservoir characterization: an overview(Review)
    (Springer link, 2021) Oumarou, Sanda; Djeddi, Mabrouk; Tabod Charles, Tabod; Jean, Marcel; Ngos III, Simon; Jean Marcel, Abate Essi; Kamguia, Joseph
    The present study focuses on a literature review using seismic attributes in the characterization of hydrocarbon reservoirs. This work consists of examining the contribution of seismic attributes in the characterization of reservoirs. With this, it is necessary to identify and list the attributes involved in analyzing the reservoirs and their degree of involvement in the characterization of the hydrocarbon accumulation zones. The approach used is to classify attributes according to their levels of intervention as the attributes that circumscribe hydrocarbon accumulation zones such as instantaneous frequencies. Thus, the attributes which make it possible to analyze the seismic facies must be enumerated to determine the type of hydrocarbons. The aim of this work is not only to review the literature on the use of seismic attributes in the characterization of reservoirs but also to expose the limitations of these attributes in the study of reservoirs to search for the most adapted attributes that have never been used in reservoir analysis. As a result, several seismic attributes used in reservoir characterization will be evaluated while demonstrating their strengths and limitations to consider either the combination of certain attributes or the experimentation of new attributes in deepening the knowledge on the study of reservoirs. This work will contribute to a more sophisticated study in this domain
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    Identification and evolution of clay minerals in the sand-shale reservoirs of the Berkine basin (Algeria)
    (HAL, 2010) Boudella, Amar; Aliouane, Leila; Bounif, Abdallah; Benaïssa, Zahia; Benaissa, Abdelkader; Bentellis, Abdelhakim; Aïfa, Tahar
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    Heterogeneities analysis using the generalized fractal dimension and continuous wavelet transform
    (2012) Ouadfeul, Sid-Ali; Aliouane, Leila; Boudella, Amar
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    Simulation numérique de déplacements polyphasiques en milieu poreux hétérogène stratifié
    (European Journals Inc, 2009) Djebouri, H.; Mohammedi, K.; Belaidi, Idir; Mabrouki, B.
    A computational code was used to solve a three phase displacement problem in stratified heterogeneous porous media. The simulator can solve basic equations of flow and transport for several components (more than 19 components). These basic equations are: the equation of conservation of the mass, pressure and the equation of energy. The discretization of the equations used the finite difference method with an implicit scheme for pressure and explicit for the saturation. The simultaneous flow of three fluid phases in a porous media is frequent in several industrial processes particularly in oil industry. The modelling of this type of flows is very complex, however the computer tool gives the possibility of simulating satisfactorily the very complex phenomena of assisted oil recovery
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    Optimization survey of gas CO2 sequestration in the TAGS Algerian reservoirs
    (International Gas Union, 2012) Hadjadj, Ahmed; Kherfellah, Haddoum N.
    This work is devoted to present the experience of Gas CO2 Storage in Algeria. The study was done to optimise the best reservoir for Gas CO2 Storage. The risks name for the two Fields considered Field I & Field II, they are: Permeable Zone in Seal, Earthquake Induced Fracturing, Leakage - Undetected Fault, NW Fractures corridors (that linear features are connected fracture corridors and, with current injection plan, could propagate through seal allowing CO2 into potable aquifer), Injection Well Leakage (With increasing pressure an inadequate barrier in wellbore material provides a leakage path to potable aquifer or surface), Old Well Leakage (Inadequate completion or chemical alteration of wellbore material provides a leakage path to potable aquifer or surface), Exceeding Spill-Point (Restricted access to pore space within structure causes CO2 flow below spill point, leaking up-dip to unknown resource potential) and Migration Direction.
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    Multifractal analysis revisited by the continuous wavelet transform applied in lithofacies segmentation from well-logs data
    (2011) Ouadfeul, S.; Aliouane, Leila
    The main goal of this paper is to use the wavelet transform modulus maxima lines (WTMM) and the detrended fluctuations analysis (DFA) methods to establish a new technique of lithofacies segmentation from well logs data. The WTMM is used to delimitate lithoafacies boundaries and the DFA is used to provide an exact estimation of the roughness coefficient of lithofacies. Application of the proposed idea at the synthetic and real data of a borehole located in Berkine basin shows that the proposed technique can enhance reservoirs characterization