Abstract

MAVARES, Francisco J  and  PERTUZ, Alberto D. Cement system design used in anchorage wells for offshore deepwater production platforms: Event: Rio de Janeiro, Brasil. Rev. Fac. Ing. UCV [online]. 2013, vol.28, n.1, pp.73-81. ISSN 0798-4065.

The cementing of wells in unconsolidated zones, with narrow margin between the pore and fracture gradients, require a focus on low density cements systems. Drilling en deep water where a series of wells are drilled, cemented, complete and put into a production in a specific maritime unit. These maritime unit of production would need a certain number of anchors, which according to study of soils can be of torpedo type or cemented wells. When drilling deep water wells of the sea floor return, the riserless, drill sections have low fracture gradient, unconsolidated sands. Cement system design are developed and laboratory tests are executed to determine the anchorage which an efficient system of well, cement and casing. Cement systems developed for offshore application with a compressive strength greater than 2500 psi, between the gradient pore and fracture in unconsolidated formations, in water depth of 1400 m, where the temperature of the ocean floor is 40 ºF. The cement system development is new in deep water, with low temperatures of the sea floor and with a high compressive strength.

Keywords : Well cementation for anchorage; Light cement; Platforms anchorage; Superficial casing; microspheres.

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