Reservoir facies in Fahud Field and throughout northwestern Oman are in shallow-shelf carbonates of the Middle Cretaceous Mishrif and Mauddud formations. Interparticle porosity formed in the Mishrif as sand aprons of lithoclast and skeletal grainstones surrounding fault-block islands, and less commonly in the Mauddud as biostromes of rudist packstones. Moldic porosity after fine rudist debris is more common than interparticle porosity and occurs in thicker stratigraphic units, interpreted to have formed locally in meteoric-water lenses of islands, and regionally during subaerial exposure associated with sea level lows.--Modified journal abstract.

You do not currently have access to this article.