«Geology, geophysics and development of oil and gas fields»

Application of the data on the core luminescence intensity in ultraviolet light to substantiate the saturation of the Jurassic layered clay reservoirs

UDC: 550.8.053
DOI: -

Authors:

¹ LUKOIL-Engineering LLC, Tyumen, Russia
² Tyumen Industrial University, Tyumen, Russia

Keywords: oil saturation coefficient, core luminescence intensity, core photographs, permeability coefficient, layered clay content

Annotation:

The authors of the article consider the Jurassic deposits represented by various types of layering, the thickness of which varies from 2...10 to 30 cm. The layered texture affects the readings of GIS methods, in particular the readings of electrical methods, which, in turn, affects the reliability of determining the oil saturation coefficient of texturally heterogeneous objects (layered reservoirs). The developed "IntensDet" software module, which processes photographs based on pattern recognition, allows automatic calculation of luminescence intensity of rocks’ oil saturation level by core photographs in ultraviolet (UV) light and accordingly predict the oil saturation coefficient of layered reservoirs. The authors of the article present the experience of using a software module to evaluate and compare the level of core luminescence intensity (brightness) of glow with the oil saturation coefficient of a layered reservoir. An example is given of comparing core luminescence intensity with the values of the oil saturation coefficient determined by the core, with corrections for layered reservoirs. The possibility of improving the luminescence intensity by dividing the intensity according to the permeability coefficient of the identified reservoir interlayers is also considered.

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