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Évolution des propriétés de transfert des grès par diagénèse et déformation : application aux formations du Buntsandstein Gp., Graben du Rhin

Abstract : The Upper Rhine Graben (URG) is the target of a renewed development of the exploitation of oil and gas resources, since the discovery of the Roemerberg field in 2008. Strong improvements were made on the understanding of the petroleum system, and on the characterization of the oil and source rocks families, and migration pathways. The interactions between faults systems and fracture network, fluid flow and fracture infill, and fracture/matrix transfers, during the burial and rift opening, are the purpose of this PhD research, focused on Buntsandstein Gp. sandstone reservoir. Through the study of several outcrops on the URG shoulders, core and well logs data (Roemerberg field), the following aspects are investigated. Structural features of the fracture network in the reservoir and in the vicinity of major fault systems are characterized, with the identification of fracture families (infill and orientation), not always parallel to the major faults. Chemical and isotopic composition of matrix and fracture diagenetic phases are analysed, to determine conditions of cementation : Temperature, type of fluid, absolute dating when possible, or relative timing. The impact on petrophysical properties is assessed by investigating the influence of diagenetic processes on pore network properties, and on "bulk" petrophysical properties. These analytical results are integrated in a renewed conceptual model of fluid flow in the basin, and give new insights on the interactions between diagenesis, fault activity and fluid-flow, and their impact on petrophysical properties at the fault scale through geological times.
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https://hal.univ-lorraine.fr/tel-02516814
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Submitted on : Tuesday, March 24, 2020 - 9:59:04 AM
Last modification on : Friday, May 29, 2020 - 2:44:02 PM

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  • HAL Id : tel-02516814, version 1

Citation

Claire Bossennec. Évolution des propriétés de transfert des grès par diagénèse et déformation : application aux formations du Buntsandstein Gp., Graben du Rhin. Sciences de l'ingénieur [physics]. Université de Lorraine, 2019. Français. ⟨NNT : 2019LORR0154⟩. ⟨tel-02516814⟩

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