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First EAGE West Africa E&P Workshop
- Conference date: October 12-14, 2022
- Location: Cape Town, South Africa
- Published: 12 October 2022
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Probabilistic Play-based Exploration in TotalEnergies: Dedicated workflow & tools to open new Plays in West Africa
Authors J. Bouroullec, B. Wendebourg, C. Fabre, B. Fourdan, C. Dumont, I. Billeaud and J. HennuySummarySince 2015, TotalEnergies has raised Play-Based Exploration at the core of its exploration workflow and strategy in Africa
The company has developed a dedicated organization in each Region or Sub-Region (Africa, Americas, Middle East and Central Europe, North Sea & Russia and Asia-Pacific), a dedicated workflow as well as a set of tools and platforms, allowing the integration of all exploration knowledge and experience. An important part of this approach is the assessment of spatial uncertainties, which are characterized and quantified on the different play elements and combined into a probabilistic play fairway map. This helps to better explore the patrimonial acreage and capture the most promising acreage in both frontier and Emerging basins but also rejuvenate key prospective plays in Mature basins. Ultimately, this approach allows building TotalEnergies exploration strategy and optimize our investment decisions, like in West-Africa exploration, where this approach 1) helped identifying oil-dominating play fairways in a dominating emerging gas province, 2) allowed us anticipating our post-discovery acreage reinforcement & capture strategy in a frontier basin and 3) allowed us identifying max extension of a mature play in an unexplored part of the basin and better assess the related value of information for the future exploration.
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Integrating Data and Knowledge Into Highly Detailed 3D Reservoir Models Using Geostatistical Seismic Reservoir Characterization
Authors S. Rasoulzadeh and A. Moradi TehraniSummaryReservoir characterisation is aimed at incorporating all available and measured information and data into an integrated 3D reservoir model. Obviously data and information have different scale and varied degrees of uncertainty. For example, 3D seismic data have great lateral coverage but lack required resolution to identify thin-layered units in reservoir, on contrary well data are of high detail vertical resolution with limited lateral coverage. Expert geological knowledge; identified geological trends or stratigraphic sequence features, are of very large scale and contain higher uncertainty level.
Geostatistical seismic reservoir characterization methods have demonstrated their flexibility and capability of integrating different type of data into a highly detailed reservoir models, beyond seismic resolution. Another important requirement; quantitative measure of uncertainty within reservoir model is also produced using this technique. In this paper we discuss a Geostatistical seismic reservoir characterisation method which works as a full 3D modelling tool and hence preserves lateral continuity of reservoir units ( H.Debeye, 2019 ). We will discuss integration method followed by uncertainty estimation. Published examples will be provided to demonstrate the advantages of this technology for seismic reservoir characterisation studies. This method is computationally demanding process so we will discuss how to accelerate run time by utilising cloud solutions.
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Key Insights from Structural Domains and Hydrocarbon Play Types in the Northern Orange Basin, South Africa
Authors J. Salomo, A. Fielies, C. Van Bloemenstein, S. Wela and R. AfricaSummaryThe new rifting concepts and models have been used to better demarcate crustal zones into regional structural domains within the Orange Basin, offshore South Africa. These have led to the extension of the western limit of the Orange Basin and the identification of new hydrocarbon play types. Some of these plays are analogous to recent discoveries in Namibia.
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Source Rock De-Risking in the Southern Atlantic Margin
Authors K. Rodriguez and N. HodgsonSummaryOf all the key exploration play elements, the one factor that can be usefully conjugated across the Atlantic is the understanding of the formation and characteristics of the source rock. New imaging and analysis workflows are revolutionizing the understanding of distribution and maturity of source rocks, pointing to huge future potential in these South Atlantic Basins.
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Exploration Opportunities Offshore Angola: Considerations from the Conjugate and Beyond
By M. PlummerSummaryA demonstration of the translation of play potential between offshore Angola and it’s conjugates/analogues. The evaluation of wide ranging seismic datasets from the South Atlantic has enabled comparisons to be made between offshore Angola and Brazil, along with incorporating other different play concepts that can be applied to the Angolan margin. Variations in basin structure and sedimentary fill across the Angolan offshore provide opportunities in multiple play types at different stages of exploration maturity.
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Venus, Graff and More - Overview of Orange Basin’s Play Trends
Authors F. Winter and A. IntawongSummarySince recent oil discoveries (Venus-1 and Graff-1) have renewed interest in the prospectivity of the Orange Basin ( Figure 1 ), this paper is aiming to give an overview of the main play concepts and how two newly proven plays help guide the identification of hydrocarbon prospectivity analogues with equivalent reservoir, traps and possible migration paths along the margin.
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Using Modern CSEM Processing of Legacy Data to Validate Prospectivity Mapped Using Seismic Data, Offshore Nigeria
More LessSummaryThrough utilizing new Controlled Source Electromagnetic (CSEM) technology to re-process legacy 2D data, we have revalidated hydrocarbon prospectivity mapped using seismic reflectivity attributes and identified previously unknown Electromagnetic (EM) anomalies that can potentially help to high-grade the prospect portfolio in OPL 325, located in the deep-water Niger Delta
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