05.07.2009

Natural gas as it comes out of the ground is odorless and thus an order is added to it before it is supplied to consumers for safety reasons

Such as to drive the hydrocarbons to the surface. A reservoir is completely or partially isolated from the pressure regime in the surrounding rock. As oil is produced the gas cap above it expands. As it expands it loses energy. The temperature and pressure in the reservoir drop until eventually there is not enough energy left to drive the drive the oil out. Gas drive is not an efficient long term production driver.

The gas recovery factor (expected ultimate recovery divided by original gas-in-place) indicates what percent of the total resource can be recovered. Ultimately, the actual percentage recovered is significantly driven by complex economic and technological considerations.

Gate valves are named after a wedge-shaped internal plastic barrier, called a gate which rises and falls inside the valve as a handle is turned (the handle does not rise or fall, only the gate). Gate valves effectively regulate flow rates from zero to full flow, they work well with solids-laden water, and these valves can be serviced in place if necessary. In comparison, ball valves are designed to be either fully on or fully off, and can be easily damaged by solids-laden water. Thus ball valves are usually not repairable unlike gate valves.

Namely, when natural gas competes with natural gas rather than with oil products.

Prices determined by the interplay of supply and demand – gas-on-gas-competition – that are traded at physical or notional hubs

The science of determining the absolute age of rocks, fossils and sediments

Onshore and offshore production facilities have oil, gas, and water well sites, piping, and gas oil separation plants/production platform (GOSP) sites. The plant process and utility facilities, as well as the operator controls and displays, are at the GOSP.

A gathering line is a pipeline that transports oil or gas from a central point of production to a transmission line or mainline. Narrow diameter pipeline used to aggregate crude oil from an oil field to a single point before moving it to the main pipeline for further transportation.