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Line 1: − [[file:GeoWikiLogo.jpg|300px]]+ − + − + − by Thamer Alnasser and Fahad Badqaish, Saudi Aramco+ − + − + − + − − − ==Preface== − − The use of seismic interpretation is a critical element in modelling the subsurface geology. Exploration drilling plans are made primarily based on seismic results in addition to offset well data. Plans include primary targets, coring points, casing depths, overpressure zones and planned terminal depth. While drilling, discrepancies from prognosis are likely to be found. Logging while drilling (LWD) tools and lithologic description are used to make the necessary adjustments while drilling to optimize drilling costs and reduce drilling risks. −
Introduction to biosteering operation (view source)
Revision as of 21:04, 21 April 2022
, 21:04, 21 April 2022no edit summary
{{GeoWiki Write Off
|image=GeoWikiLogo.jpg
==An Entry from the AAPG [[2021 Middle East Wiki Write Off]]!==
|Author=Thamer Alnasser and Fahad Badqaish
|Affiliation=Saudi Aramco
|Competition=[[2021 Middle East Wiki Write Off]]
}}
The use of seismic interpretation is a critical element in modelling the subsurface geology. Exploration drilling plans are made primarily based on seismic results in addition to offset well data. Plans include primary targets, coring points, casing depths, overpressure zones and planned terminal depth. While drilling, discrepancies from prognosis are likely to be found. Logging while drilling (LWD) tools and lithologic description are used to make the necessary adjustments while drilling to optimize drilling costs and reduce drilling risks.
[[file:AlnasserBadqaishFigure1.jpg|thumb|300px|{{figure number|1}}Coring point planned in well AC-2 based on prognosis and LWD correlations with well AC-1.<ref name=Fadiya_2014>Fadiya, S. L. 2014. Impact of wellstie biostratigraphy on exploration drilling in the deepwater offshore Nigeria. Journal of African Earth Sciences 100: 60 – 69.</ref>]]
[[file:AlnasserBadqaishFigure1.jpg|thumb|300px|{{figure number|1}}Coring point planned in well AC-2 based on prognosis and LWD correlations with well AC-1.<ref name=Fadiya_2014>Fadiya, S. L. 2014. Impact of wellstie biostratigraphy on exploration drilling in the deepwater offshore Nigeria. Journal of African Earth Sciences 100: 60 – 69.</ref>]]
[[file:AlnasserBadqaishFigure2.jpg|thumb|300px|{{figure number|2}}Actual coring point evaluated after integrating biostratigraphic data with LWD measurements.<ref name=Fadiya_2014 />]]
[[file:AlnasserBadqaishFigure2.jpg|thumb|300px|{{figure number|2}}Actual coring point evaluated after integrating biostratigraphic data with LWD measurements.<ref name=Fadiya_2014 />]]