A workflow for reservoir characterization applied to presalt coquinas from the Linguado Field, Campos Basin, Brazil

Peçanha, Alessandra Alves; Lupinacci, Wagner Moreira; Ferreira, Danilo Jotta Ariza; Freire, Antônio Fernando Menezes

doi:10.1016/j.petrol.2019.106451

Cited by 12 publications

(4 citation statements)

References 4 publications

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“…Under a given pressure, the mercury at room temperature is pressed into the pores of the rock sample, and the contact surface between the capillary and the mercury will generate a capillary force in the opposite direction to the external pressure, thereby preventing the mercury from entering the capillary. When the pressure increases above the capillary force, the mercury will continue to penetrate the pores (Li C. L. et al, 2015;Pecanha et al, 2019). Therefore, a pressure value applied from the outside can be used to measure the size of the corresponding pores.…”

Section: ) High Pressure Mercury Intrusion Experimentsmentioning

confidence: 99%

Quantitative evaluation of reservoir quality of tight oil sandstones in chang 7 member of Ordos Basin

Qiu

Li²,

Liu³

et al. 2023

Front. Earth Sci.

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In order to establish a quantitative evaluation system for reservoir quality suitable for tight oil sandstones, in this study, taking the Chang 7 Member in the Maling area of the Ordos Basin as an example, the nuclear magnetic resonance, clay mineral analysis, high pressure mercury injection analysis and logging interpretation technology have been used to carry out a comprehensive evaluation of the pore structures, sand body structures and oil-bearing properties of tight oil sandstone reservoirs. The results show that the pseudo-capillary pressure curves transformed by the NMR T2 spectra are consistent with the capillary pressure curves measured by the core experiments. This method can be used for accurate characterization of the pore structures of the reservoir. The pore structure parameters calculated based on the pseudo-capillary pressure curves can accurately reflect the pore structures of the reservoirs such as micropores-thin throats and complex tortuosity. At the same time, the smoothness feature of conventional logging curves is used to evaluate the sand body structures and heterogeneity of the reservoir, and the apparent energy storage coefficient is introduced to quantitatively evaluate the oil-bearing properties of tight oil reservoirs. The evaluation results are in good agreement with the actual production situation. The larger the apparent energy storage coefficient, the higher the initial output of the oil wells. The evaluation results of the reservoir quality of the tight oil sandstones constructed in this paper are highly consistent with the production status, so the method has broad application prospects.

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Section: ) High Pressure Mercury Intrusion Experimentsmentioning

confidence: 99%

Quantitative evaluation of reservoir quality of tight oil sandstones in chang 7 member of Ordos Basin

Qiu

Li²,

Liu³

et al. 2023

Front. Earth Sci.

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“…However, more than ten years after its discovery, operations in the pre-salt carbonates continue to present challenges in terms of drilling, production, and also in relation to the reservoir characterization [4,5]. Pre-salt carbonate reservoirs are highly complex and heterogeneous [2,6,7], a feature justified by the nature of the original deposition system and the subsequent diagenetic processes [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Multi-Objective Optimization of the Rate of Penetration and Mechanical Specific Energy: A Case Study Applied to a Carbonate Hard Rock Reservoir Based on a Drill Rate Test Using Play-Back Methodology

Mantegazini,

Nascimento,

Dornelas

et al. 2024

Applied Sciences

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Until early 2006, in Brazil, the focus used to be on oil and gas exploration/exploitation of post-salt carbonates. This changed when the industry announced the existence of large fields in pre-salt layers across the South Atlantic Ocean from nearshore zones up to almost 350 [km] from the shore. With the discovery of pre-salt hydrocarbons reservoirs, new challenges appeared. One of the main challenges is the necessity to optimize the drilling processes due to their high operational costs. Drilling costs are considerably high, which leads the oil and gas industry to search for innovative and entrepreneurial methods. The coupling of the mechanical specific energy (MSE) and the rate of penetration (ROP) is a method that allows for the identification of ideal conditions to efficiently enhance the drilling process. In addition, the performance of the drilling process can be estimated through pre-operational tests, which consist in continuously testing the applied drilling mechanic parameters, such as the weight-on-bit (WOB) and drill string rotary speed (RPM), looking for optimum sets that would ultimately provide the most desirable ROP. Thus, the goal of this research was to analyze field data from pre-salt layer operations, using a multi-objective optimization based on the play-back methodology for pre-operational drilling tests, through the ideal combination of the highest ROP and the lowest MSE. The results showed that the new concept of pre-operational tests based on the MSE proved to be effective in the drilling process optimization. The combination of the highest ROP and the lowest MSE allows for a high-performance drilling process. For WOB intervals of 5 and 7 [klb], a good fit of the parameters was obtained. Through the parameters obtained from pre-operational tests, the eventual cost-saving and time-saving values could be estimated, respectively, ranging from USD 1,056,180 to 1,151,898 and 19.50 to 21.27 [h], respectively. In addition, the results of this research can be applied to the exploration of other natural resources, such as natural hydrogen and geothermal sources.

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“…Typically, the structural model of the reservoir is limited by the top and base of the reservoir and the presence of faults. These 3D models are used for modeling facies properties, as porosity and permeability (Ferreira and Lupinacci, 2018;Peçanha et al, 2019;Penna and Lupinacci, 2021), and geological process modeling (Ferreira et al, 2021a).…”

Section: Introductionmentioning

confidence: 99%

Tectono-Stratigraphic Modeling of the Wildcat Prospect (Gato do Mato), Santos Basin, Brazil Focusing on Presalt Carbonate Reservoirs

2022

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The Santos Basin is the largest Brazilian offshore basin and is currently the main hydrocarbon producer in the country, comprising an area of approximately 350,000 km2 . Given the importance of understanding and analyzing its carbonate reservoirs (Itapema and Barra Velha formations), a tectono-stratigraphic model of the Wildcat Prospect was created. This area is in the Outer High of the Santos Basin, main region of the presalt carbonate reservoirs in the Santos Basin. The 3D model is focused on the presalt reservoir and the understanding of the main tectonic structures in this area and their relationships that conditioned the carbonate successions deposition. Four steps were followed to analyze the depositional and structural framework and build the tectono-stratigraphic model: (i) generation and analysis of seismic attributes to identify and characterize seismic terminations (erosional truncation, toplap, and onlap), seismic facies (debris, build-ups, platform carbonates, and bottom lake), and assist in the tectono-stratigraphic analysis; (ii) seismic interpretation of horizons and faults, which were used as input for the modeling as surfaces and fault planes, creating compartmentalized blocks; (iii) construction of the stratigraphic column to classify the succession of tectonic and sedimentary events; and (iv) the construction of the model. This study helps to understand the depositional and structural evolution of the presalt and provides a three-dimensional understanding of the influence of faults on the reservoir geometry. Faults influenced the eroded zone observed in the Upper Barra Velha Formation, since this erosion occurs mainly at the edges of the large-throw faults. The build-up seismic facies, the main reservoirs in the study area, have a trend NW-SE to N-S following the large-throw faults.

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A workflow for reservoir characterization applied to presalt coquinas from the Linguado Field, Campos Basin, Brazil

Cited by 12 publications

References 4 publications

Quantitative evaluation of reservoir quality of tight oil sandstones in chang 7 member of Ordos Basin

Quantitative evaluation of reservoir quality of tight oil sandstones in chang 7 member of Ordos Basin

Analysis and Multi-Objective Optimization of the Rate of Penetration and Mechanical Specific Energy: A Case Study Applied to a Carbonate Hard Rock Reservoir Based on a Drill Rate Test Using Play-Back Methodology

Tectono-Stratigraphic Modeling of the Wildcat Prospect (Gato do Mato), Santos Basin, Brazil Focusing on Presalt Carbonate Reservoirs

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