Determination of Initial Fluid Saturations Using Traced Drilling Media

Bennion, D.B.; Thomas, F.B.; Ma, T.

doi:10.2118/01-01-02

Cited by 1 publication

(1 citation statement)

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“…Proper evaluation of initial fluid saturations is essential for reserve estimation, evaluated using log techniques, and, more accurately, by direct measurements of fluid saturation from in-situ core samples [43]. However, obtaining the initial fluid saturation that exists in the porous media of a core is not straight forward as it can be affected by flushing by the coring fluid, as well as degassing and fluid losses [43,44]. Fluids in shales are contained in the pore system as a free phase, or as a soluble phase dissolved in liquid phases.…”

Section: Fluid Expulsion and Lossesmentioning

confidence: 99%

Best Practices for Shale Core Handling: Transportation, Sampling and Storage for Conduction of Analyses

Basu

Jones

Mahzari

2020

JMSE

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Drill core shale samples are critical for palaeoenvironmental studies and potential hydrocarbon reservoirs. They need to be preserved carefully to maximise their retention of reservoir condition properties. However, they are susceptible to alteration due to cooling and depressurisation during retrieval to the surface, resulting in volume expansion and formation of desiccation and micro fractures. This leads to inconsistent measurements of different critical attributes, such as porosity and permeability. Best practices for core handling start during retrieval while extracting from the barrel, followed by correct procedures for transportation and storage. Appropriate preservation measures should be adopted depending on the objectives of the scientific investigation and core coherency, with respect to consolidation and weathering. It is particularly desirable to maintain a constant temperature of 1 to 4 °C and a consistent relative humidity of >75% to minimise any micro fracturing and internal moisture movement in the core. While core re-sampling, it should be ensured that there is no further core compaction, especially while using a hand corer.

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Section: Fluid Expulsion and Lossesmentioning

confidence: 99%