Automated Gaslift Control Pecten Cameroon Company — Who

Automated Gaslift Control Pecten Cameroon Company - Who we are, where we are - What we had in the past and the problems it gave… - What we have now and the benefits we've realised… - What we plan to have in the future and what we still hope to gain… - Summary Pecten Cameroon Company 1

Automated Gaslift Control Past System: ØFlow rates influenced by Merla Valves ØFlow & Pressure monitored by Barton Recorders ØFlow rate set on platforms by Operator ØEach Operator had his 'favourite' settings, changed shift by shift ØWhen supply pressure varied, flow varied ØWhen casing pressure varied, flow varied Varying Gas Injection Rates & Pressures Made Tests Inaccurate Merla Valve Gas to Well Gaslift Manifold Barton Recorder Pecten Cameroon Company 2

Automated Gaslift Control Present System: ØFlow rates controlled by Fisher Valves ØFlow & Pressure monitored by SCADA ØFlow rate set from Juliet by Well Analyst ØWhen supply pressure varies, flow remains constant ØWhen casing pressure varies, flow remains constant Juliet Server Fisher Valve Gas to Well Gaslift Manifold d. P Cell Linked to SCADA And yes, we still have The Barton recorders… Pecten Cameroon Company 3

Automated Gaslift Control This System Will: ØEnsure constant liftgas injection despite variations in liftgas supply pressure But It Will Not: ØPrevent a well from surging: it is not a replacement for good gaslift design! Juliet Server Fisher Valve Gas to Well Gaslift Manifold d. P Cell Linked to SCADA Pecten Cameroon Company 5

Automated Gaslift Control Future System (1): ØFlow rates controlled by Fisher Valves ØFlow & Pressure monitored by SCADA ØFlow rate set from Juliet by Win. GLUE ØWhen supply pressure varies, flow varies in a controlled way ØWhen casing pressure varies, flow remains constant Juliet Server Fisher Valve Win. GLUE Gas to Well Gaslift Manifold d. P Cell Linked to SCADA Pecten Cameroon Company 6

Automated Gaslift Control Future System (2): ØSystem will produce the most oil under most conditions: üChange in compressor outputs will cause every control valve to change position üSystem monitors and controls 24 hours per day Juliet Server Fisher Valve Win. GLUE Gas to Well Gaslift Manifold d. P Cell Linked to SCADA Pecten Cameroon Company 7

Automated Gaslift Control Future System (3): ØCompensate for surface facility bottlenecks: üModify the Winglue table's output üWhen one part of the field bottlenecks, route lift gas elsewhere üMost efficient use of liftgas and facilities Juliet Server Bottleneck Compensator Fisher Valve Gas to Well Gaslift Manifold d. P Cell Linked to SCADA Pecten Cameroon Company Win. GLUE 8

Automated Gaslift Control Summary: ØBetter quality well tests ØMore efficient use of liftgas ØMore stable than manual control ØOptimum use of surface facilities ØEnsures that good wells receive gas when supply drops ØLess load on operators, but more load on instrument techs ØEstimated 2% increase in net oil production (on top of what we thought was an optimised system…) 9