1.1       Scope of Work

The scope of the HAZOP study was the X-2 NW Wellhead Platform process facilities and associated utilities as detailed on the P&IDs, which comprised of:

·         DWG–NW–PR–1001 : P&ID for wellheads;

·         DWG–NW–PR–1201 : P&ID for multiple select valves;

·         DWG–NW–PR–1301 : P&ID for multi-phase flow meter;

·         DWG–NW–PR–1501 : P&ID for pig valve (launcher);

·         DWG–NW–PR–2501 : P&ID for production electric heater system;

·         DWG–NW–PR–3601 : P&ID for glycol injection facilities;

·         DWG–NW–PR–3602 : P&ID for corrosion inhibitor injection;

·         DWG–NW–SA–6001 : P&ID for fire water system;

·         DWG–NW–SA–6201 : P&ID for CO2 extinguishing system; and

·         DWG–NW–PR–6601 : P&ID for vent and closed drain system.

The above-mentioned P&IDs are attached in Appendix II.

2.2工作范围

HAZOP研究的范围是P&ID中详述的X-2 NW井口平台工艺设施和相关公用设施，包括：

•图纸NW-PR-1001：井口P&ID；

•图纸-NW-PR-1201：多个选定阀门的P&ID；

•图纸–NW–PR–1301：多相流量计的P&ID；

•图纸-NW-PR-1501：清管阀（发射器）的P&ID；

•图纸-NW-PR-2501：生产电加热器系统的P&ID；

•图纸NW-PR-3601：乙二醇注入设施的P&ID；

•图纸-NW-PR-3602：缓蚀剂注入的P&ID；

•图纸NW-SA-6001：消防水系统的P&ID；

•图纸-NW-SA-6201：CO2灭火系统的P&ID；和

•图纸–NW–PR–6601：通风和闭式排水系统的P&ID。

上述P&ID见附录II。