Term |
Meaning |
|
1P |
Proved gas reserves |
|
2P |
Proved and probable gas reserves |
|
3P |
Proved, probable and possible gas reserves |
|
Adsorption |
The physical process whereby a gas ( eg methane ) may be held on the surface of a material ( eg coal ) |
| ATP |
Authority to Prospect |
| BCF or Bcf |
Billion cubic feet (10^9 cubic feet)
While BCF is a unit of volume and PJ is a unit of energy the calorific value of CSG is such, on the average, that one BCF of gas provides one PJ of energy. |
| BTU |
British thermal unit - a unit of heat energy defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. |
| Calorific Value |
The energy contained within a certain mass of a material, eg a gas. |
| Coal Measure |
Refers to the stratification of layers of coal interspersed with strata of other sedimentary materials. |
| Core or coring |
The process of drilling a hole and retaining the material from a target depth for examination and testing – "taking a core". |
| CSG |
Coal seam gas also called coal bed methane ( CBM ), refers to the gas ( principally methane ) which is found in coal seams. |
| Desorption |
The process of reversal of Adsorbtion. |
| Fault |
A line of fracture and generally displacement of one section of the crust against another. |
| Gas-in-place or GIP |
The quantity of gas which is estimated to be contained in a known coal formation of discrete area. |
| GJ |
Gigajoule (10^9 joules).
There are 1000 GJ in a Terrajoule ( TJ ) and 1000 TJ in a Petajoule ( PJ ) |
| kPa or kilopascal |
One kilopascal equals 1000 Pascals (Pa) or 1 kPa = 0.145 lbf/in2. |
| LPG |
Liquid Petroleum Gas |
| MCF or Mcf |
Thousand cubic feet (10^3 cubic feet). |
| MMCFor MMcf |
Million cubic feet (10^6 cubic feet). |
| MMCFDor MMcfd |
Million cubic feet per day. |
| mPa or megapascal |
10^6 Pascals. |
| MW or megawatt |
A unit of power. |
| MWh |
Megawatt hour- a metric unit of energy, especially electrical energy. |
| Permeability |
Permeability describes the ability of a gas like methane, to pass through or be released from a fractured solid like coal. |
| Pilot Well |
A well for gas and water extraction, generally in close proximity to another for the assessment of field potential. |
| PJ |
Petajoule (1000 joules). |
| PL |
Petroleum Lease. A PL is required to be granted to permit the commercial exploitation of a reserve. |
| PLA |
Petroleum Lease Application. |
| psi |
Pound per square inch (also known as - lbf/in2) - a traditional unit of pressure. |
| Punch Hole |
A small diameter hole which is drilled to confirm the exact depth of an underground structure or seam. |
| Reserve |
A resource which has been quantified by a verifiable process and has demonstrated commercial value. |
| Resource |
An unquantified body of material of potential value. |
| Seismic |
An assessment process whereby the reflected vibrations from a series of shocks or vibrations on the surface are used to infer underground structures. |
| Tenement |
The area and location over which an ATP is granted. |
| TCF or Tcf |
Trillion cubic feet (1000 cubic feet). |
| TJ |
Terajoule (1000 joules). |
| W or Watt |
Power which in one second gives rise to energy of one joule. |
| Well casing |
Steel lining used to provide the structural basis for a gas well or core hole. |