Weighted average cost of gas
Weighted average cost of gas purchased during a given period of time, typically a month
Weld procedure, weld procedure specification
A WPS is a document that describes how welding is to be carried out in production. They are recommended for all welding operations and many application codes and standards make them mandatory. They should include sufficient details to enable any competent person to apply the information and produce a weld of acceptable quality
Well
DTI defines a well to be a borehole drilled into the earth from a single surface or subsurface location to a single subsurface location. If the surface location changes but the target location stays the same then a new well is regarded as a respud of the first well. If the target location changes but …
Well fluid, well stream
The fluid, usually a combination of gas, oil, water, and suspended sediment, that comes out of a reservoir
Wellhead
The equipment installed at the surface of the wellbore. A wellhead includes such equipment as the casinghead and tubing head. The point at which the crude (and/or natural gas) exits the ground. Following historical precedent, the volume and price for crude oil production are labeled as “wellhead,” even though the cost and volume are now …
Wellhead compressor
Production from oil and gas wells can be increased using compression to provide reduction of backpressure in well bores, increased pressures into sales lines, and recovery of valuable hydrocarbon vapors from stock tanks. Often changes in the pressure will dramatically increase oil and gas production from low volume wells
Water table
A level beneath the Earth’s surface, below which all pore spaces are filled with water and above which the pore spaces are filled with air. The top of the zone of saturation in a subsurface rock, soil or sediment unit
Well testing; Well testing services
A well test is when the well is opened up and flowed under controlled conditions. There are several short (hours) periods of flow with various choke valve settings with shut in periods of build up in between. Flow testing confirms the capability of the reservoir to deliver. DST are essential for SEC reserves booking. Testing …
Ultra Super Critical; Ultra supercritical coal; ultra-supercritical technology
New pulverized coal combustion systems – utilizing supercritical and ultra-supercritical technology – operate at increasingly higher temperatures and pressures and therefore achieve higher efficiencies than conventional units and significant CO2 reductions. Ultra-supercritical units operate at even higher efficiencies than critical units, potentially up to around 50% (but easily between 45-48). The introduction of ultra-supercritical technology …
Continue reading “Ultra Super Critical; Ultra supercritical coal; ultra-supercritical technology”
Ultra-deep water, ultra deepwater
Between 6,000-10,000 feet. As fields are discovered in ultra deepwater (6,000 – 10,000 ft), the oil and gas industry is searching for floating production systems (FPS) that can economically develop those fields. Choosing the right FPS depends on the water depth, hull motions, and the type of riser system desired