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Abstract

Summary

The factors controlled reservoir quality in the Bentiu Formation are: 1) sediments depositional processes; 2) diagenetic processes; and 3) burial depth. As a result, the porosity and permeability of the studied samples vary significantly due to these factors. Based on a detailed sedimentological and petrographical analyses, the following general conclusions are made:

  • The coarser to medium grained sandstones with lower total clay content have higher porosity and permeability than sandstones with highest clay content, suggesting that clay content is a major control in porosity and permeability.
  • Quartz overgrowths, pyrite, siderite and iron oxide together with kaolinite and chlorite are the major cement minerals observed in the studied Bentiu sandstones. These minerals migrate/ disaggregate into pore spaces and throats, thereby causing a decrease in porosity and permeability.
  • With increasing the burial depth, the mounts porosity and permeability decrease due to compaction and cementation (quartz overgrowths).

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/content/papers/10.3997/2214-4609.202010032
2021-10-18
2024-04-29

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.202010032
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Sedimentology, Diagenesis and Reservoir Quality of the Bentiu Formation in the Fula Sub-Basin, Muglad Basin, Sudan
Conference Proceedings 2021, 1 (2021); https://doi.org/10.3997/2214-4609.202010032
/content/papers/10.3997/2214-4609.202010032
/content/papers/10.3997/2214-4609.202010032
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