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AbstractThis paper summarizes the design, operation, results, and reservoir modeling of a miscible hydrocarbon gas injection pilot using horizontal wells in a large carbonate reservoir in an offshore operating environment. The pilot included a single horizontal water-alternating-gas (WAG) injector flanked by two horizontal producers drilled near the base of the reservoir. The three-well pattern was surrounded by four water injectors which provided confinement and pressure control. Produced gas from the field was used for injection without supplemental enrichmentThe pilot began operations in 1997. Commencing in 1999, gas was injected in three cycles over a period of four years. A clear incremental oil rate response to the gas injection was first observed in early 2003, peaking with a 400% oil rate increase from the two producers.Pilot results have been history matched with a compositional reservoir model to reconcile reservoir characterization interpretations and to provide prediction of ultimate recovery. Incremental recovery over waterflood operations is predicted to be 6% of original oil-in-place for 0.15 hydrocarbon pore volumes of gas injection.
SYNOPSIS. Besnoitia darlingi (Brumpt, 1913) Mandour, 1965 has been rediscovered in the common opossum Didelphis marsupialis in the Republic of Panama. A strain (D3) has been established in laboratory white mice. Proliferative crescents of the D3 strain are 6.1 (range 6.0‐9.0) by 2.1 (range 1.7‐4.0).
Mouse‐adapted B. darlingi produced acute, fatal infections in white mice, hamsters, 14 marmosets (Saguinus geoffroyi), 2 squirrels (Sciurus variegatoides and S. granatensis), a woolly opossum (Caluromys derbianus) and a four‐eyed opossum (Philander opossum) It probably produced chronic infections (cysts) in 2 wild‐caughtopossums (Didelphis marsupialis) and one lizard (Ameiva ameiva). Animals in which induced infection could not be found after inoculation with trophozoites of mouse‐adapted B. darlingi were: 2 adult and 2 new‐born guinea pigs, laboratory rats, 1 night monkey (Aotus trivirgatus), 2 rhesus monkeys (Macacca mulatta), one iguana (Iguaanaiguana) and 2 baby caimans (Caiman sclerops).
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