SECTION P4 SEPARATION SYSTEMS

Transcription

1 SEPARATION SYSTEMS The platform has a Separation System which consists of a Test Separator (MBD-100). The gas, oil and water discharges to the Departing Bulk Oil Pipeline (KAH-1200). Rev: 1 Date: 7/31/12 Page 1 of 5 HI 376 C

2 A. PRE-STARTUP PROCEDURE NOTICE: Refer to Preliminary Considerations in SECTION 3, PART A before beginning any start-up procedures. 1. Test Separator, MBD-100 a. Verify all vent and drain valves throughout the system are closed NOTICE: Any vessel purging should be done prior to getting system ready for start-up. b. Verify manual valves are open or closed as necessary to correctly direct flow through the system c. Verify that all liquid level controllers, pressure controllers and control valves are in-service and prepared for flow Gas discharge PC/PCV Liquid dump LC/LCVs Rev: 1 Date: 7/31/12 Page 2 of 5 HI 376 C

3 B. START-UP PROCEDURES 1. Test Separator, MBD-100 a. Verify that no safety devices are bypassed beyond those that must be bypassed for start-up (flag device as appropriate) on the Operator Interface b. Press the Well Enable tag for the desired well to be tested c. Verify liquid LCV settings d. Monitor and place safety devices in service as they clear e. Visually verify operating parameters for vessel as production is brought on WARNING: Any operating parameter that is monitored by a safety device must be continuously monitored at all times while the safety device(s) are in bypass. The bypassed safety devices (indicators) must be flagged while in bypass and reset as they come in-service. REFER TO: Section 3 Part A for further details on bypassed devices. 2. Continue to monitor bypassed safety devices and reset as they come in service 3. Immediately begin using Normal Operating Procedures to continue monitoring system REFER TO: SECTION 5, PART D Rev: 1 Date: 7/31/12 Page 3 of 5 HI 376 C

4 C. SHUT-DOWN PROCEDURES WARNING: If complete process shut-down is required in order to shutdown the desired separation system, REFER TO: SECTION 4 NOTICE: Refer to Preliminary Considerations in SECTION 4, PART A before beginning any shut-down procedures. 1. Shut-down and isolate minor components that discharge to the separation system, and are not capable of being diverted to another separation system a. Manually activate the liquid dump to lower the vessel liquid level. Use caution not to lower the level far enough to trip the LSL (if applicable) b. Use LO/TO procedure to shut-down and isolate liquid dump from discharging to separation system WARNING: The Separation System must be returned to service to accept discharge before high liquid level or additional shutdowns will be required. 2. Place the separation system safety devices that are likely to trip and cause a process shutdown in bypass and flag WARNING: Any operating parameter that is monitored by a safety device must be continuously monitored at all times while the safety device(s) are in bypass. The bypassed safety devices (indicators) must be flagged while in bypass and reset as they come in-service. REFER TO: Section 3 Part A for further details on bypassed devices. 3. If possible, divert flow from inputs to alternate systems WARNING: The capacity of any alternate system should be verified before adding any additional inflow. a. Open the manual valve to divert flow to alternate system b. Slowly close manual valve to isolate flow away from separation system to be shutdown c. Monitor system accepting diverted flow to ensure operation within safe parameters Will level or pressure control devices require adjustment? Will new operating ranges need to be established? Rev: 1 Date: 7/31/12 Page 4 of 5 HI 376 C

5 4. If necessary, manually activate liquid dumps in separation system vessels before isolating all system input CAUTION: Pay special attention to the levels in the minor components that were isolated and/or shutdown, the liquids dumped from this separation systems before final shut-down may have an effect on the liquids sent to those vessels later. 5. Shut-down facility inputs that flow to the separation system and will not be diverted a. Platform Wells REFER TO: SECTION P1, PART C 6. Isolate the separation system a. Close all inlet manual valves to separation system b. Close gas discharge manual valves from system components c. Close oil dump manual valves from system components d. Close water dump manual valves from system components 7. Flag shut-down components as Out of Service 8. Open the manual gas relief/vent valve to bleed components to the relief system 9. Open the manual liquid drain valve to drain remaining liquid 10. Verify components are bled to 0 psig 11. Continue to monitor the other in service systems for safe operating parameters 12. Continue to monitor liquid level in other minor isolated components so appropriate action can be taken as necessary NOTICE: If shut-down was performed as preparation for maintenance work, or if the cause of the shutdown requires corrective action/repair, continue with Lock Out/Tag Out (LO/TO) Procedures REFER TO: Fieldwood Safe Work Practices for LO/TO (Section D Chapter 5) (can be found on the Fieldwood SEMS Portal) Rev: 1 Date: 7/31/12 Page 5 of 5 HI 376 C