Publications

Since the discovery of Kasim ail field in 1972, some eighty-five wells have been drilled by Petromer Trend in the Salawati Basin. This subsurface information, together with earlier Shell Oil and Pertamina data, provides a fairly complete picture of basin history with its Miocene reef growth, burial, tilt and subsequent deformation.Until Eocene time the basin deepened southward. Mio-Pliocene northward tilt accompanied by left-lateral displacement on the Sorong fault, resulted in the present basin shape.Near surface geothermal gradients three times normal are. common, the high gradients decrease with depth.Subaerial exposure of the porous Miocene carbonate reservoirs resulted in an active brackishwater drive.The Walio reef complex is part of barrier and pinnacle reef system at the edge of a carbonate platform that extends southwestward from Klamono to Misool Island. Walio oil field exhibits many of the above characteristics - Late Neogene platemargin kinematics affected reservoir prope.rties, type of sediment enclosing the reef, fresh water influx, and possibly the abnormal geoth&mal gradient. Twentyeighot Walio wells presently produce 36,000 b/d of 35 API low-sulfur oil from a depth of 2,400 to 2,900 feet.