The EFFECT OF DENSITY-VELOCITY RELATION PARAMETERS ON DENSITY CURVES IN TAU (Τ) FIELD, NIGER DELTA BASIN

Atat, J. G.; Akankpo, Akaninyene O.; Umoren, E. B.; Horsfall, O. I.; Ekpo, S. S

doi:10.26480/mjg.02.2020.54.58

Cited by 6 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(Effiong, et al, 2015). The study area is in the Niger Delta region experiencing two distinct seasons which are the dry and the rainy (wet) seasons (Atat and Umoren, 2016;Atat et al, 2020a;Atat et al, 2020b). The average temperature of the area is put at 25 degrees centigrade while the average humidity of the area is put at 88 percent.…”

Section: Materials and Methods Location And Geology Of The Study Areamentioning

confidence: 99%

Activity concentration of natural radionuclides and transfer factors from soil to vegetable in parts of South South Nigeria

Benjamin,

Essiett,

Bede

et al. 2023

wojast

View full text Add to dashboard Cite

Naturally occurring radionuclide materials are known to exist in soils and is transferred into vegetables and eventually gets into food chain. This work was aimed at determining the activity concentration of these radionuclides in soils and vegetable (fluted pumpkin) and the internal exposure due to the consumption of these materials in the vegetable in parts of South South Nigeria particularly Etim Ekpo Local Government area. The activity concentrations of twenty (20) soil samples and 20 vegetable samples from the farmlands were determined using gamma spectrometry. The activity concentration for 40K ,232Th and 238U from the soil samples ranged from 6.69±0.35 (Bqkg-1) to 168.19 ±8.82 (Bqkg-1) ,0.23 ±0.01 (Bqkg-1) to 5.91 ±0.35 (Bqkg-1) and BDL to 21.53±2.5 (Bqkg-1) respectively. The activity concentration of 40K, 232Th and 238U in the vegetable ranged from (584.23±27.71) Bqkg-1 to (958.67±48.46) Bqkg-1, from (1.84±0.11) Bqkg-1 to (9.72 ±0.56) and from (BDL) to (38.34±3.74) Bqkg-1 respectively. Transfer factors obtained ranged between 12.07±4.7 to 35.35 ±27.9 for 40K, 1.80±0.125 to 5.76 ± 4.31 for 232Th and BDL to 21.05 for 238U. Effective ingestion dose due to the consumption of vegetable from the study area obtained as 0.0021mSvy-1. This value is less than the 0.29mSvy-1 recommended dose limit for the general public; therefore, the consumption of this vegetable could not cause a radiological health effect on its consumers. However negligible or low risk could be minimised when the vegetable is washed and cooked before being consumed. Hence, the results obtained in this study indicate that the activity concentration of the farmland soils and crops represent no significant health risk on the farmers and the consumers of the vegetables.

show abstract

Section: Materials and Methods Location And Geology Of The Study Areamentioning

confidence: 99%

Activity concentration of natural radionuclides and transfer factors from soil to vegetable in parts of South South Nigeria

Benjamin,

Essiett,

Bede

et al. 2023

wojast

View full text Add to dashboard Cite

show abstract

“…𝐷 𝛾 = 0.427𝐶 𝑈 + 0.662𝐶 𝑇ℎ + 0.043𝐶 𝐾 ……………. (4) Where 𝐷 𝛾 is the absorbed dose rate in air, (nGyh -1 ), 𝐶 𝑈 , 𝐶 𝑇ℎ , 𝐶 𝐾 are the activity concentration of 238 U, 232 Th, 40 K.…”

Section: Absorbed Dose Rate In Airmentioning

confidence: 99%

Activity concentration, transfer factor and radiological health risk assessment of natural radionuclides in soil and maize in oil producing areas in Akwa Ibom state, Nigeria

EYIBIO I. K,

ESSIETT A. A,

ATAT J. G

et al. 2024

World J. Adv. Sci. Technol.

View full text Add to dashboard Cite

The activity concentration (AC) of 238U, 232Th, 40K of soil and maize in oil producing areas has been studied. Also studied are the transfer factor (TF) from soil to maize and the radiological health risk associated with consumption of maize. The equipment used was the Sodium Iodide-Thallium (NaI(TI)) detector. The mean activity concentration (AC) (Bqkg-1) of 238U, 232Th, 40K in soil are 12.77±0.25, 41.36±0.70 and 458.61±8.04 while that of maize are 14.36±0.27, 19.23±0.46 and 425.25±7.87 respectively. Transfer factor (TF) from soil to maize of 238U, 232Th and 40K are 1.14, 0.50 and 0.94 correspondingly. Other useful results obtained in this research include the Radium Equivalent (Raeq), Absorbed Dose Rate (ADR), Annual Effective Dose (AED) and Excess Lifetime Cancer Risk (ELCR) as 74.59 Bq/kg, 37.14 nGy/h, 0.05 mSv/y and 0.16 respectively. The average values of soil activity concentration from the oil producing areas are within world permissible limits given by UNSCEAR (2000) as 420 Bqkg-1 for 40K, 33 Bqkg-1 for 238U and 45 Bqkg-1 for 232Th. However, 238U and 232Th from maize activity concentration are far higher than world permissible limits of 0.02 Bqkg-1 and 0.003 Bqkg-1 respectively. The mean value of the radiological hazard indices was below the WMPV given as 370 Bq/kg for Raeq, 59 nGy/h for ADR, 1 mSv/y for AED and 0.29×10-3 for ELCR. This clearly shows that radiation doses exposed to Akwa Ibomites through the consumption of maize cultivated in this area poses very little to no effect to their health as only about 16 out of every 100,000 persons may likely have cancer fatality in their time.

show abstract

“…𝑁 𝑎𝑛 𝑍 𝐴 𝜌 ……………………(3) [36,38] 𝑤ℎ𝑒𝑟𝑒 𝑛 𝑒 is the electron density number in electron cm -3 ; 𝑁 𝑎𝑛 is the number Avogadro number; Z is the atomic number and A is the atomic mass.…”

Section: 𝑛 𝑒 =mentioning

confidence: 99%

Untitled

2023

World J. Adv. Sci. Technol.

View full text Add to dashboard Cite

The assessment of rock reservoir volume concentration is necessary as it accounts for the appreciable pore spaces available for hydrocarbon and other targets. Raw well d-ata from oil wells A, B and C in some parts of the Niger Delta Basin (XA Field) were used for porosity estimates in sandstone and shale formations. Using the Microsoft Excel for analysis, gamma ray log, density log with respect to depth were generated. The results of these curves were used to estimate porosity and create models for porosity-formation factor with respect to density effect. The major findings revealed the average porosity values as about 20% for well A, 17% for well B and 19% for well C. The results show that increase in density gives rise to a decrease in porosity in both lithologies. In order to establish a relationship between porosity of this Field rock reservoir, a plot of porosity with formation factor due to density influence was necessary. These curves lead to several equations with the average for linear curves as 𝐹 𝐷 = −400∅ 𝑋 𝐴 + 98.08 and 𝐹 𝐷 = (−0.2∅ 𝑋 𝐴 + 4.9) × 10 −3 for fractional and percentage porosities respectively. These models show that both parameters are strongly related with coefficients of 0.9723 (for both plots from well A), 0.8274 (for both plots from well B) and 0.9689 (for both plots from well C) for XA Field. These results correspond to the non-linear relation, ∅ 𝑋 𝐴 = 0.8006𝐹 𝐷 −0.465 as the original values of the cementation exponent and the tortuosity factor are obtained, if the formation factor is considered as the subject.

show abstract

The EFFECT OF DENSITY-VELOCITY RELATION PARAMETERS ON DENSITY CURVES IN TAU (Τ) FIELD, NIGER DELTA BASIN

Cited by 6 publications

References 0 publications

Activity concentration of natural radionuclides and transfer factors from soil to vegetable in parts of South South Nigeria

Activity concentration of natural radionuclides and transfer factors from soil to vegetable in parts of South South Nigeria

Activity concentration, transfer factor and radiological health risk assessment of natural radionuclides in soil and maize in oil producing areas in Akwa Ibom state, Nigeria

Untitled

Contact Info

Product

Resources

About