Assessment of some baryte ores from Northern Cross-River, Nigeria, for oilfield drilling fluid supplement

Authors

  • Debrah Memshima Oahimire World Bank Africa Centre of Excellence, Centre for Oilfield Chemicals Research, University of Port Harcourt
  • Victor Uchechi Ukaegbu Department of Geology, University of Port Harcourt, Rivers State, Nigeria
  • Joel Friday Ogbonna World Bank Africa Centre of Excellence, Centre for Oilfield Chemicals Research, University of Port Harcourt

DOI:

https://doi.org/10.15243/jdmlm.2021.091.3015

Keywords:

API standard requirement, baryte, Benue Trough, oil fields drilling fluid, quality evaluation

Abstract

There is a very high demand for the American Petroleum Institute (API) grade baryte in Nigeria due to the continuous massive drilling in oil and gas fields. Considering the presumption that local baryte is of low quality, processed baryte is imported, leading to great national revenue losses. Some baryte deposits in the Northern Cross River, Nigeria were sampled and studied in field and laboratories, based on API standard requirements (2004 and 2010), to ascertain their suitability for use as weighting additive in drilling fluids. Furthermore, flame testing of the samples yielded yellowish-green flame indicating barium presence; X-ray diffraction (XRD) and X-Ray fluorescence (XRF) analyses confirmed the mineralogy and chemical composition of the samples, respectively. The results revealed the Specific Gravity, SG range of 4.37 to 4.52; concentration of alkali earth metals as calcium 8.40mg/kg to 62.10mg/Kg; the residue >75micron and particle sizes <6microns processed had normal range, respectively below 3% and 30%; and the samples’ BaSO4 %weightcomposition was over 90%. The chemical analysis indicated no significant undesired minerals. Galena gangue with baryte was observed in three locations though these could be easily beneficiated through physical separation.  The tests and analyses result qualified the Northern Cross River baryte samples as high-grade API standard baryte, suitable for oilfield drilling fluid. Further estimation of the baryte reserves in this region was highly recommended, as this might proffer a substantial solution to the sustainable supply of excellent local quality drilling baryte in Nigerian oilfields.

Author Biography

Debrah Memshima Oahimire, World Bank Africa Centre of Excellence, Centre for Oilfield Chemicals Research, University of Port Harcourt

PhD student

 

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Submitted

01-04-2021

Accepted

03-06-2021

Published

01-10-2021

How to Cite

Oahimire, D. M., Ukaegbu, V. U., & Ogbonna, J. F. (2021). Assessment of some baryte ores from Northern Cross-River, Nigeria, for oilfield drilling fluid supplement. Journal of Degraded and Mining Lands Management, 9(1), 3015–3026. https://doi.org/10.15243/jdmlm.2021.091.3015

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Section

Research Article