Heat Flow in the Campos Sedimentary Basin and Thermal History of the Continental Margin of Southeast Brazil

Cardoso, Roberta A.; Hamza, Valiya M.

doi:10.1155/2014/384752

Cited by 15 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3). Due to the lack of rock thermal conductivity data for the Santos Basin, thermal conductivity data from the nearby Campos Basin are used 9 .…”

Section: Basic Parametersmentioning

confidence: 99%

“…Geothermal measurements have been performed for more than 1360 areas in the southeastern waters of Brazil to obtain the geothermal gradients and terrestrial heat ow values of different sedimentary basins [7][8][9] . Hamaza et al (2017) calculated the geothermal gradients and terrestrial heat ow values of the sedimentary basins along the Brazilian continental margin using corrected bottom hole temperature data and thermophysical parameters of rocks.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Present Geothermal Fields in the Santos Basin, Brazil

Zuo

Wang

Lan

et al. 2023

Preprint

View full text Add to dashboard Cite

The Santos Basin, located in the southeastern waters of Brazil, is a passive continental margin basin with the most abundant deepwater petroleum resources in the world discovered to date. However, few studies have been conducted on the present geothermal fields of the Santos Basin, which severely restricts the oil and gas resource evaluation of the basin. This study first utilizes 35 temperature data from 16 post-salt drilling wells and 370 temperature data from 31 pre-salt drilling wells to calculate the post-salt and pre-salt geothermal gradients and terrestrial heat flows in the Santos Basin. Then, the basin simulation software BasinMod 1D is used to quantitatively evaluate the impacts of salt rock sedimentation on the present geothermal fields and the maturity of pre-salt hydrocarbon source rocks. The results demonstrate that the present post-salt geothermal gradient in the Santos Basin is 2.20–3.97 ℃/100m, with an average value of 2.99 ℃/100m, and the post-salt terrestrial heat flow is 54.00-97.32 mW/m2, with an average value of 73.36 mW/m2, while the present pre-salt geothermal gradient is 2.21–2.95 ℃/100m, with an average value of 2.53 ℃/100m, and the pre-salt terrestrial heat flow is 61.85–82.59 mW/m2, with an average value of 70.69 mW/m2. These values are characteristic of a low-temperature geothermal fields in a zone with a stable structure. The sedimentation of the salt rock causes a decrease in the temperature of the pre-salt strata, which inhibits pre-salt hydrocarbon source rock maturity, with an inhibition rate of up to 1.32%. The inhibition degree decreases with increasing salt rock thickness. At the same time, the salt rock thickness is positively correlated with the present surface heat flow. The unique distribution of the salt rock and related salt structures lead to present terrestrial heat flow differences among different structural units in the basin. This study is of great significance for evaluating and exploring the pre-salt oil and gas resources in the Santos Basin.

show abstract

“…3). Due to the lack of rock thermal conductivity data for the Santos Basin, thermal conductivity data from the nearby Campos Basin are used 9 .…”

Section: Basic Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Present Geothermal Fields in the Santos Basin, Brazil

Zuo

Wang

Lan

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…It is worth noting that the temperature in reservoirs can reach over 100 °C, but the gel used for the fracture process is nowhere close to such a level of temperature, except when it enters the oil well. (For more details, see [8].) At this point, the fracturing process is ended.…”

Section: Materials Preparation and Rheometrymentioning

confidence: 99%

Rheological properties of a cross-linked gel based on guar gum for hydraulic fracture of oil wells

Vargas

Andrade

Loureiro

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

The hydraulic fracturing of oil wells is, supposedly, the first technique used to upgrade the oil and gas production. The main idea of this technique is to inject a fluid containing any kind of proppant into the well at a high flow rate and high pressure. One kind of fluid quite used as fracturing material is a cross-linked water-based guar gum gel. It seems that the rheological character of this kind of gel has not yet received the attention it deserves. This material is highly non-Newtonian and must be carefully analysed for further improvement in the fracturing process. We carried out different rheometric tests, which are presented in terms of the shear stress versus shear rate. The material seems to behave like a visco-elastic fluid, reasonably well described by the Jeffrey model. In addition, it is worth noting that the gel is very slippery, even on a rough surface. For this reason, we paid great attention to the maximum stress (a critical stress), above which the gel slips. We strongly believe that this stress has great practical importance for flow assurance and could be used to estimate the total pressure drop in the fracturing process.

show abstract

“…Geothermal measurements have been performed for more than 1360 areas in the southeastern waters of Brazil and the geothermal gradients and terrestrial heat flow values of different sedimentary basins were obtained 7 – 9 . Hamaza et al (2017) calculated the geothermal gradients and terrestrial heat flow values of the sedimentary basins along the Brazilian continental margin using corrected bottom hole temperature data and thermophysical parameters of rocks.…”

Section: Introductionmentioning

confidence: 99%

Present geothermal field of the Santos Basin, Brazil

Zuo,

Wang,

Lan

et al. 2023

Sci Rep

View full text Add to dashboard Cite

The Santos Basin, located in the southeastern waters of Brazil, is a passive continental margin basin with the most abundant deepwater petroleum resources in the world discovered to date. However, few studies have been conducted on the present geothermal fields of the Santos Basin, which severely restricts the oil and gas resource evaluation of the basin. This study first utilizes 35 temperature data from 16 post-salt drilling wells and 370 temperature data from 31 pre-salt drilling wells to calculate the post-salt and pre-salt geothermal gradients and terrestrial heat flows in the Santos Basin. Then, the basin simulation software BasinMod 1D is used to quantitatively evaluate the impacts of salt rock sedimentation on the present geothermal fields and the maturity of pre-salt hydrocarbon source rocks. The results demonstrate that the present post-salt geothermal gradient in the Santos Basin is 2.20–3.97 °C/100 m, with an average value of 2.99 °C /100 m, and the post-salt terrestrial heat flow is 54.00–97.32 mW/m2, with an average value of 73.36 mW/m2, while the present pre-salt geothermal gradient is 2.21–2.95 °C/100 m, with an average value of 2.53 °C/100 m, and the pre-salt terrestrial heat flow is 61.85–82.59 mW/m2, with an average value of 70.69 mW/m2. These values are characteristic of a low-temperature geothermal field in a zone with a stable structure. The sedimentation of the salt rock causes a decrease in the temperature of the pre-salt strata, which inhibits pre-salt hydrocarbon source rock maturity, with an inhibition rate of up to 1.32%. The inhibition degree decreases with increasing salt rock thickness. At the same time, the salt rock thickness is positively correlated with the present surface heat flow. The unique distribution of the salt rock and related salt structures lead to present terrestrial heat flow differences among different structural units in the basin. This study is of great significance for evaluating and exploring the pre-salt oil and gas resources in the Santos Basin.

show abstract

Heat Flow in the Campos Sedimentary Basin and Thermal History of the Continental Margin of Southeast Brazil

Cited by 15 publications

References 34 publications

Present Geothermal Fields in the Santos Basin, Brazil

Present Geothermal Fields in the Santos Basin, Brazil

Rheological properties of a cross-linked gel based on guar gum for hydraulic fracture of oil wells

Present geothermal field of the Santos Basin, Brazil

Contact Info

Product

Resources

About