The solution gor of the oil as it resides in the reservoir.

A drive mechanism where a drop in pressure releases gas from the oil that helps drive the oil towards the wellbore. it is a poor recovery mechanism.

Single, homogenous liquid, solid, or gas phase that is a mixture in which the components (liquid, gas, solid, or combinations thereof) are uniformly distributed throughout the mixture. in a solution, the dissolved substance is called the solute; the substance in which the solute is dissolved is called the solvent.

A solution that contains at a given temperature as much of a solute as it can retain. at 68 degrees f it takes 126.5 lb/bbl salt to saturate 1 bbl of fresh water. see supersaturation.

A solution that contains 1 gram-equivalent of a substance per liter of solution.

Unit chemical weight of solute per million unit weights of solution. the epm of a solute in solution is equal to the ppm (parts per million) divided by the equivalent weight.

A colloid that is not easily precipitated from a solution and is readily dispersible after the precipitation by an addition of the solvent.

The condition of containing more solute in solution than would normally be present at the existing temperature.

The loss of drilling fluid to a formation, usually caused when the hydrostatic head pressure of the column of drilling fluid exceeds the formation pressure. this loss of fluid may be loosely classified as seepage losses, partial losses or catastrophic losses, each of which is handled differently depending on the risk to the rig and personnel and [...]

Gor that includes solution and free gas from the reservoir.

Gas / oil ratio. may refer to a solution gor or total gor.

Produced gor = total gas (solution + free) production divided by the oil production volume. excludes gas lift gas.

A chemical analysis process where drops of a standard solution are added to another solution or substance to obtain a response: color change, precipitation, or conductivity change, for measurement and evaluation.

A porous and permeable underground formation containing an individual and separate natural accumulation of producible hydrocarbons (oil and/or gas) which is confined by impermeable rock or water barriers and is characterized by a single natural pressure system. a subsurface, porous, permeable rock body in which oil and/or gas is stored, most reservoir rocks are limestones, [...]

The production of a separate liquid phase from a mixture of gases (e.g., rain), or of a separate solid phase from a liquid solution, as in the precipitation of calcite cement from water in the interstices of rock.