A thorough understanding of reservoir structure is essential to good reservoir management and design of efficient oil recovery processes. In the Federal waters of offshore Santo Borbora, California, the Corpinteria Field's Repetto reservoir comprises multiple layers of unconsolidated sand broken into numerous compartments by faulting. Inadequate understanding of the makeup of this reservoir has resulted in bypassed oil zones, the opening of some wells in zones bearing only water, and loose sand clogging wells. The reservoir is in danger of being abandoned because of these production problems. In this DOE Oil Recovery Field Demonstration Project, Pacific Operators Offshore, Inc. will use innovative drilling and completion strategies based on improved knowledge of the reservoir to increase oil production and reduce the production of sand and water. Accurate emplacement of a horizontal well with multiple lateral extensions into a productive horizon will maximize contact with oil-bearing zone and ovoid unproductive formations, providing more efficient access to the reservoir's multiple productive layers. Geological and production data and modeling technology will be used to develop the well drilling and completion plan. The horizontal well performance will be monitored to determine the economic feasibility and production potential of applying the technology field wide Publications, presentations, and a workshop conducted by the project operators will transfer the technology to regional producers for use in other reservoirs.