Characterization of a Paleokarstic Oil Field (Rospo Mare, Italy): Sedimentologic and Diagenetic Outcomes, and Their Integration in Reservoir Simulation

Fournillon, Arnaud; Bellentani, Giuseppe; Moccia, A.; Jumeaucourt, C..; Terdich, P.; Siliprandi, Francesco; Peruzzo, F.

doi:10.1007/978-3-319-45465-8_5

Cited by 4 publications

(3 citation statements)

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“…Understanding the origins and evolution is essential for the exploration and identification of deposits associated with the paleokarst [4,53,54]. Examples of such reservoirs containing significant geothermal water resources are recognized, among others, in Rospo Mare, Italy [16]; in Geneva Basin, Switzerland [55]; and the Wolonghe Gasfield in Sichuan Basin, China [46].…”

Section: Discussionmentioning

confidence: 99%

“…In several petroleum basins (such as Ta-rim, Ordos and Sichuan), hydrocarbon accumulations have been discovered in carbonate formations with strongly developed karst features [4][5][6][7][8]. Similar types of fields are also exploited in other countries around the world, including Canada, the US, Mexico, Venezuela, Saudi Arabia, Iraq, Russia and Kazakhstan, and also in the North Sea and the Barents Sea [9][10][11][12][13][14][15][16][17]. Analyses of geological and drilling data showed that the volume of karst structures can account for a significant portion of porosity for some hydrocarbon fields [18].…”

Section: Introductionmentioning

confidence: 99%

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Examples of Paleokarst in Mesozoic Carbonate Formations in the Carpathian Foreland Area

Łaba-Biel,

Filipowska-Jeziorek,

Urbaniec

et al. 2024

Energies

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A paleokarst system developed in the Upper Jurassic–Lower Cretaceous carbonate complex has been recognized in the Carpathian Foreland area. Well logs testing and core data as well as an acoustic imager, a microresistivity scanner and six-arm dipmeter images were used to identify and analyze the character of the paleokarst features. A detailed interpretation of microresistivity and acoustic image logs allowed for the identification of different types of karst forms, such as caverns; multidirectional fractures, including fractures widened by dissolution; and the type of sediments filling them. The analysis of the seismic survey was conducted by linking the paleokarst characteristic features recognized in the seismic image to the karst intervals determined from borehole data. The set of seismic attributes calculated from the analyzed 3D seismic data, including the RMS amplitude, instantaneous frequency, consistent dip, variance, sweetness and relative acoustic impedance, helped to delineate the zones of the paleokarst distribution. Within the interpreted paleokarst surface developed in the carbonate formations in the study area, there are sinkholes, limestone pavements and valleys. Furthermore, in the northwestern part of the analyzed area, the development of paleokarst forms is related to the presence of a relatively deep branch of a paleovalley formed in the Paleogene, as well as to numerous discontinuities developed in carbonate formations. The development of this type of larger karst form was probably controlled primarily by tectonic faults. The research conducted by the authors of this paper showed the widespread presence of paleokarst features in Upper Jurassic–Lower Cretaceous carbonate formations in the study area. A good spatial identification of the paleokarst surface can be important in a regional context, since the highest part of the profile of carbonate formations is the most important reservoir for geothermal or hydrocarbon resources in this region.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Examples of Paleokarst in Mesozoic Carbonate Formations in the Carpathian Foreland Area

Łaba-Biel,

Filipowska-Jeziorek,

Urbaniec

et al. 2024

Energies

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“…An example of deep low salinity water in a karst oil reservoir is recorded in the offshore drilling of the Rospo Mare structure (Adriatic Sea, about 30 km off the coast of Italy) at about 1300 m below sea-level, where heavy oil is trapped in Cretaceous karstic limestones. Most of these karst cavities are filled with fresh or slightly brackish water [18,166,167], which is thought to be directly connected with the Maiella limestone-rich mountains, where the aquifer is recharged, some 70 km to the NW of Rospo-Mare. Interestingly, this example is located in an active tectonic setting and differs from the classic passive margin case studies (e.g., New Jersey).…”

Section: Integration With Petroleum Geology Studiesmentioning

confidence: 99%

Seismic Reflection Methods in Offshore Groundwater Research

et al. 2020

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There is growing evidence that passive margin sediments in offshore settings host large volumes of fresh and brackish water of meteoric origin in submarine sub-surface reservoirs. Marine geophysical methods, in particular seismic reflection data, can help characterize offshore hydrogeological systems and yet the existing global database of industrial basin wide surveys remains untapped in this context. In this paper we highlight the importance of these data in groundwater exploration, by reviewing existing studies that apply physical stratigraphy and morpho-structural interpretation techniques to provide important information on—reservoir (aquifer) properties and architecture, permeability barriers, paleo-continental environments, sea-level changes and shift of coastal facies through time and conduits for water flow. We then evaluate the scientific and applied relevance of such methodology within a holistic workflow for offshore groundwater research.

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Rospo Mare Integrated Reservoir Study Italy, Adriatic Sea: An Innovative Approach of Karst System Modeling and History Match

Bellentani

Godi

Siliprandi

et al. 2016

Day 1 Mon, September 26, 2016

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Rospo Mare is a heavy oil fractured karstic carbonate reservoir producing since the 80's. Reservoir pressure is constant due to a strong aquifer tilted toward north east. The producing wells are systematically operated at critical rate to prevent water production (no water treatment installation). The paper is focused on the modeling of the fractures and the karst system in conjunction with an innovative history match approach used to match the forced anhydrous oil production and to represent the complex water position and behavior through time. As the main fracturing phase of Rospo Mare reservoir occurred before the karstification phase, the dissolution of the carbonates was guided by the existing fracture network. The karst system and the fracture network were modeled together thanks to a fracture model that includes several enlarged fracture sets and lineaments. The fracture modeling was also guided by the relative compactness of the matrix facies distribution. Because of limited data for fracture characterization, the dynamic characteristics of fractures, particularly the aperture of enlarged fractures, were fully considered as history match parameters. The history match approach consisted in using both the historical oil production and the prediction period to make sure that the wells were producing at their critical rate and ensure a realistic displacement of water at both field and well levels. This unusual strategy was necessary because of lack of data to constrain history match (no water and gas production, no pressure variation). Therefore the history match was performed by taking into account the prediction period through a do nothing case scenario. Based on the assumption of critical rate, a decline of the oil production rate is expected during the prediction period. This allowed assessing the vicinity of water at wells: both the rise of the water table and the coning effect at wells. The matched model successfully honors the water displacement and position at key wells including the last two side tracks drilled in 2012. The model allows a good representation of the reservoir physical behavior and provides a useful tool for piloting the field and assisting future decisions.

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Characterization of a Paleokarstic Oil Field (Rospo Mare, Italy): Sedimentologic and Diagenetic Outcomes, and Their Integration in Reservoir Simulation

Cited by 4 publications

References 2 publications

Examples of Paleokarst in Mesozoic Carbonate Formations in the Carpathian Foreland Area

Examples of Paleokarst in Mesozoic Carbonate Formations in the Carpathian Foreland Area

Seismic Reflection Methods in Offshore Groundwater Research

Rospo Mare Integrated Reservoir Study Italy, Adriatic Sea: An Innovative Approach of Karst System Modeling and History Match

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