ABSTRACT

BP Exploration's Pompano subsea development is a deepwater subsea production project in the Gulf of Mexico. There were various operational and technological challenges which had to k addressed to configure a subsea control system to operate effectively, to be installed and maintained effectively in deepwater, and to do so with the minimization of cost and risk. Through testing and anal benchmarks were developed, which were used to monitor the system performance and provide a powerful analytical tool for this remote system. Another significant feature of the program which greatly reduced risk on costs and time scale, was the contracting style adopted. The control system vendor (GEC-Marconi), as well as other key contractors, involved at the early project definition phase. This provided assistance to BPX in optimizing their field development plan and enabled the key contractors to closely identify with BPXS needs, as well as developing an integrated working relationship. This enabled overall system optimization to occur, while minimizing risks at interfaces. The high-cost derailed implementation phase of the project was extremely fast track.

Introduction

The Pompano subsea development includes up to two subsea template/manifold systems tied back to the Pompano production platform. A ten-slot oil production manifold &T-1) was installed some 4.5 miles southeast of the production ptatform; ten wells are planned at this location. Up to four water injection wells may be installed on a separate template southwest of PT- 1 later. Figure 1 shows the layout of the field development.

The production platform was installed during Phase 1 of the field development in the southeast comer of Viosca Knoll Block 989 (VK 989) in 1,290 foot water depth. The subsea template/manifold was installed in Mississippi Canyon Block 28 (MC 28) in 1,865 foot water depth

The oil production trees, production manifolds, and well systems were designed to be maintained with TFL tools. system has two TFL service lines from the host platform to the production manifolds; one TFL line also serves as a well test line. The production manifold has remotely controlled diverters for directing the TFL tools to the desired well. A multi-fine chemical injection system will treat the subsea production wells and manifolds with paraffin inhibitor, methanol, and corrosion inhibitor.

A multiplex electro and hydraulic system will control and monitor the subsea and related surface equipment. The surface units of the production control system will be heated on the host platform. The operator will control the system from the master control station (MCS) in the control cabin. Separate electric and hydraulic/chemical umbilicals connect the surface equipment to PT-1.

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