Abstract
Chatom field, located in Washington County, Alabama, produces sour gas condensate in the Jurassic Smackover Formation. The 1971 discovery currently has 4 producing wells. The 4 wells supply a 25 million cu ft sour gas cleaning plant. Structurally, Chatom field is an isolated Jurassic closure located along a N. to S. trending Louann salt ridge. Isopachs indicate both Jurassic and Cretaceous structural growths. The reservoir rock, the Upper Smackover Formation, consists of a finely crystalline dolomite with intercrystalline porosity and a pelmoldic dolomite with both intercrystalline and moldic porosities. Both types exist together in a single porosity zone. Porosities and permeabilities are generally higher in the pelmoldic dolomites. Petrographic analysis indicated the Upper Smackover reservoirs were deposited as low energy, pellatal muds and moderate energy oolitic shoals. Dolomitization occurred early in both the grainstone facies and the nonporous lime-mud facies. The original and dolomitic porosities have been enhanced by selective grain leaching.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
