Open AccessDiagenetic stages of oil-saturated sandstones of the pashyisky horizon at the Romashkinskoye oil field
Author(s) -
Э. А. Королев,
AUTHOR_ID,
В. П. Морозов,
А. А. Ескин,
A. N. Kolchugin,
E R Barieva,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
elmi əsərlər
Language(s) - English
Resource type - Journals
eISSN - 2218-8622
pISSN - 2218-6867
DOI - 10.5510/ogp2021si200563
Subject(s) - diagenesis , geology , clastic rock , quartz , horizon , geochemistry , authigenic , chalcedony , siderite , petrology , sedimentary rock , paleontology , physics , astronomy
It was identified three stages of reservoir rock formation of the Pashyisky horizon of the Frasnian stage of the Upper Devonian at the Romashkinskoye field, based on optical microscopic studies. The first stage, associated with clastic deposits sedimentation and marked by clastic grains dense structural packing formation, close to cubic. The second diagenetic stage of quartz sandstones is associated with the subsidence stage of sediments into the burial zone. During this period were actively proceeding the processes of grains mechanical deformation, blastesis of quartz clasts, the formation of siderite fragments, and fibrous chalcedony, partially metasomatic replacing clay layers in sandstones. The third diagenetic stage in quartz sandstones is associated with the migration of underground gas-water solutions. Analysis of the transformation degree of the Pashyisky horizon quartz sandstones at different areas of the Romashkinskoye field revealed the relationship between the intensity of secondary diagenetic processes and the degree of rocks oil saturation. Keywords: pashyisky horizon; oil; sandstone; reservoir; diagenesis.