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Flow assurance has taken on a primary role in FEED studies as of late and has become a standard tool to test design ideas, design changes, and operating strategies. The expectation from such studies is to lower the risk of flow assurance related problems, thereby minimizing both capital expenditures and operating costs. This discussion includes both the methodology and the results of the flow assurance study. Production is located offshore and is made up of two platforms with a 25 kilometer flowline between them. The production stream is the combination of production from 5 wells and contains oil, water, and gas. This combined fluid presents primarily two flow assurance related problems: slugging and wax deposition. In the case described herein, simulation tools incorporated the various data to create an understanding of the three typical operating scenarios:normal production operations and the respective flowline characteristicsplanned and un-planned shutdowns with resultant fluid cool-down behaviorstart-up methodology and subsequent transient behavior A review of the methodology of the FEED study includes a discussion of what constitutes the necessary input data, how that data was used, how design changes were treated, and how other engineering aspects utilized these results for the final design. The resulting simulated operations of the production system are presented. This includes the thermal behavior of the flowline, the changing fluid characteristics, and the associated temperatures and pressures with respect to the operating methodologies and mitigation techniques. Finally, what makes this study possible is the use of state of the art dynamic simulation technology to delineate complex behavior in flowline systems. A discussion of the computing power and the software capabilities required for such an involved set of variables is provided. Introduction A recent discovery in Ca Ngu Vang field has lead to development of Vietnamese offshore leases and one lease in particular from Hoan Vu Joint Operating Company (HVJOC) prompted an immediate FEED study. Of the multitude of engineering disciplines that began work to assess the needs for this offshore production and transportation endeavor certainly a key aspect was flow assurance. Coupling experience and technology, flow assurance results in reducing initial capital expenditures through efficient design of transportation facilities and ensuring the reliable, manageable, and profitable flow of fluids from the reservoir to the sales point. The plan included producing from five wells, commingling production topside to a wellhead platform (designated CNVWHP), and tie-back to an existing production platform (designated CPP-3) roughly 25 kilometers away. The intent of the engineering analysis is to determine the potential problems experienced by producing these fluids through the proposed facilities and providing remediation solutions.

For discussion at an Ordinary Meeting on Tuesday, 25 February, 1964 at 5.30g.m., and for subsequent written discussion SYNOPSIS

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