ASSOCIATED GAS COMPRESSOR
When the oilfield production fluid arrives at the group gathering station‚ it is delivered to the production separators. These horizontal separation vessels isolate the incoming process fluid into its respective gas and liquid streams. The first stage‚ high pressure separator removes the bulk of the free gas‚ whereas the subsequent‚ medium and low pressure production separators provides a means of further extracting gas due to additional residence time. Dissolved gases that have come out of solution due to handling pressure losses can also be extracted at this point. The gas output from the low pressure production separator is then fed to the first stage‚ vertical gas separator. The pressure of the exiting gas stream is boosted by a FORNOVO GAS Compressor and comingled with the gas discharged from the high pressure production separator. These recombined gas streams are introduced into a second stage gas separation vessel to further remove liquid. The conditioned gas stream is then delivered to a second stage FORNOVO GAS Compressor‚ which boosts the gas through a meter to record the recovered volume prior to storage. The captured gas can then be reused to support a gas reinjection program or can be exported depending on its quality‚ or can be used for electrical power generation. This means‚ gas flaring and the generation of carbon dioxide and nitrogen oxides can be significantly reduced.
When crude oil is extracted from wells, it will contain significant quantity of dissolved hydrocarbon gas. This is usually known as associated gas. The start of the oil processing is to reduce the pressure of the oil stream and thus flash off dissolved gas. This can typically happen three times at reducing pressures, according to what the inlet pressure from the well is. This flashed gas needs to be then re-compressed for further dehydration and export to sales line pressure.
Due to the unpredictable rate and composition of oilfield production‚ the effectiveness of the separators to manage the associated gas can be significantly challenged. Often liquid carryover occurs due to upset conditions in the process‚ which can adversely affect the performance and reliability of the gas compressors. Correctly matching Fornovo Gas compressor throughput with process throughput can also be difficult since many compressors are controlled by a fixed speed driver and are only permitted to operate under a narrow range of flow and pressure conditions.