Oil and Natural Gas Price Data - GASearch Energy Intelligence

Dai Hung Crude Oil	Crude oil from Vietnam with an API gravity of * and sulfur content of * %.

Dan Fox Crude Oil	Crude oil from Denmark with an API gravity of * and a sulfur content of * %.

Danish Blend Crude Oil	Crude oil from Denmark with an API gravity of * and a sulfur content of * %.

Dansk Underground Consortium (DUC) Crude Oil	Crude oil from Denmark with an API gravity of * and a sulfur content of * %.

Daqing Crude Oil	Crude oil from China with an API gravity of * and a sulfur content of * %.

Darcy	A measure of permeability. A permeability of one darcy means that the material will pass a fluid of one centipoise viscosity through a section of one cubic centimeter at a rate of one cubic centimeter per second with a drop in pressure of one standard atmosphere.

Dauntless Crude Oil	Crude oil from North Sea with an API gravity of * and a sulfur content of * %.

Dawn Hub - Ontario, Canada Natural Gas Hub	Canadian natural gas hub

Dawn Natural Gas Hub	Ontario, Canada natural gas hub - 6 pipeline interconnects

Deaerator	The apparatus used to separate the dissolved gases from the condensate.

Decontrol	The act of ending federal government control over the wellhead price of new natural gas sold in interstate commerce. Also termed "deregulation".

Dedicated Acreage	Acreage dedicated to a company by contract. More specifically, all gas produced from the dedicated acreage is dedicated to the purchasing company by contract.

Dedicated Gas Reserves	Gas reserves dedicated to a natural gas pipeline company by contract. For a pipeline it is the sum of all reserves dedicated to the company by contract.

Dedicated to Interstate Commerce	Gas reserves under contract to an interstate pipeline company and hence subject to the jurisdiction of the Commission and wellhead price controls under the NGA of 1938. The NGPA of 1978 extended the Commission's jurisdiction for wellhead pricing to essentially all gas but provided for phasing out wellhead price controls over time for certain gas.

Deep Gas	Gas found at depths greater than the average for a particular area; for FERC purposes, it is gas found at depths of more than 15,000 feet.

Degree Day	Degree days are measured as the number of degrees above or below a standardized temperature on any given day. In winter, US traders track heating degree days week by week, or month by month, normally against a standard temperature of 65F, on the basis of how many degrees of heat are required to bring municipal office buildings up to this temperature. Five days of heating by 2 degrees, for example, equals 10 heating degree days. In summer, the market tracks cooling degree days.

Degree Day, Cooling	A measure of the need for air conditioning (cooling) based on temperature and humidity. Although cooling degree days are published for many weather stations, a specific procedure has not been generally accepted.

Degree Day, Heating	A measure of the coldness of the weather experienced, based on the extent to which the daily mean temperature falls below a reference temperature, usually 65 degrees F. For example, on a day when the mean outdoor dry-

Dehydration	The process of removing liquids and moisture content from gas or other matter.

Dekatherm	A unit of heating value equivalent to 10 therms or 1,000,000 Btu's.

Dekatherm (Dth�)	A unit of heating value equal to ten therms or 1-mil Btus (1 MMBtu). Very roughly, 1Mcf = 1 MMBtu = 1Dth.

Deliver	when used with respect to any first sale of natural gas, means the physical delivery from the seller; except that in the case of the sale of proven reserves in place to any interstate pipeline, any intrastate pipeline, any local distribution company, or any user of such natural gas, such term means the transfer of title to such reserves.

Deliverability	The volume of gas a well, field, pipeline, or distribution system can supply in a given period of time. Also, the practical output from a storage reservoir.

Deliverability To A Market	This is a measure of the ability to move gas from a pipeline zone to an end user.

Delivery Point	Point at which gas leaves a transporter's system completing a sale or transportation service transaction between the pipeline company and a sale or trans-portation service customer.

Delivery Pressure	The pressure at whcih gas is delivered to the customer. Typical pressures are: Combustion Turbine - 350 to 650 psi, Gas-fired Boilers - 5 psi, Small Commercial - 2 psi, Residential - 7 inch water column (1/4 psi)

Dem Rep Congo Crude Oil	Crude oil from Congo (Dem Rep) with an API gravity of * and a sulfur content of * %.

Demand	The rate at which gas is delivered to or by a system, part of a system, or a piece of equipment, expressed in cubic feet or therms or multiples thereof, for a designated period of time called the demand interval.

Demand Charge	The portion of a rate for gas service which is billed to the customer whether they use the service or not. Depending on the rate design this charge is based on actual or estimated peak usage (1 or 3 days), annual needs or a combination of the two.

Demand Costs (Rate)	That part of the total cost of service which must be recovered through use of a demand rate; i.e., a rate for each Mcf of gas representing the customer's demand on the Company's system.

Demand Day	That 24-hour period specified by a supplier-user contract for purposes of determining the purchaser's daily quantity of gas used (e.g., 8 AM to 8 AM, etc.). This term is primarily used in pipeline-distribution company agreements. It is similar to, and usually coincides with, the distribution company "sendout day".

Demand Load	The rate of flow of gas required by a consumer or a group of consumers, often an average over a specified short time interval (cf/hr or Mcf/hr). Demand is the cause; load is the effect.

Demand Meters	A device which indicates or records the instantaneous, maximum or integrated (over a specified period) demand.

Demurrage	The detention of a vessel in loading or unloading beyond the time agreed upon. Demurrage charges are usually incurred for any delay.

Densitometer	An instrument used to determine the ratio of the density of a substance to the density of a given substance (as water or hydrogen) taken as a standard, when both densities are obtained by weighing in air.

Density	The weight of a unit of volume, usually expressed as pounds per cubic foot.

Department of Energy (DOE)	The Department of Energy is the twelfth Cabinet Position, and it consists of the Office of the Secretary of Energy and the Federal Energy Regulatory Commission. It was created on August 4, 1977 as a result of the Department of Energy Organization Act of 1977. There are many subdivisions within the DOE, but the Economic Regulatory Administration and Energy Information Administration are two groups which have significant bearing on gas utility operations.

Depletion	The reduction in value of mineral deposits as it is produced. Oil is a wasting asset, in that proceeds from the well represent both income and return of capital.

Depletion	As applied to natural gas producing land and land rights, means the loss in value incurred in connection with the exhaustion of a natural resource.

Depletion Allowance	An allowance granted on taxable income from oil and gas by the Federal and most State Governments. The current Federal rate is 15% of gross income. The law is rather involved and a tax specialist should be used when computing the tax free portion of income. This information is supplied to each partner prior to filing his income tax returns on April 15th of each year.

Derd	Directorate of Engine Research and Development. It is a UK Ministry of Defense jet fuel specification.

Deriming	Adding heat to remove accumulated solid water or carbon dioxide constituents from low-temperature process equipment.

Desiccant	Any absorbent or adsorbent, liquid or solid, that will remove water or water vapor from a material. In a refrigeration circuit, the desiccant must be insoluble in the refrigerant.

Desulfurization	The process by which sulfur and sulfur compounds are removed from gases or liquid hydrocarbon mixtures.

Devonian Shale	Geological formations, typically hundreds of feet thick, that underlie much of the Appalachian Basin. It is known to contain much natural gas, but usually lacks sufficient natural permeability for ordinary production.

Didon Crude Oil	Crude oil from Tunisia with an API gravity of * and a sulfur content of * %.

Diesel Index	A measure of the ignition quality of a diesel fuel calculated from a formula involving the gravity of the fuel and its aniline point.

Differential Pressure	The pressure difference between two points in a system. For example, the difference in pressure between the upstream and downstream taps of an orifice plate, used to measure volume passing through the orifice.

Digimu Crude Oil	Crude oil from Papua New Guinea with an API gravity of * and a sulfur content of * %.

Discounted Cash Flow (DCF)	A method to determine the cost of common equity component of return using a discounted stream of future cash dividends.

Discovery Date	Date assigned to discovery of a new field.

Discovery Well	The first oil or gas well drilled in a new field. The discovery well is the well that is drilled to reveal the actual presence of a petroleum-bearing reservoir, Subsequent wells are development wells.

Displacement	Displacement transactions permit the lateral movement of gas through a transportation network. The configuration of many pipelines is such that it may not be apparent whether a given movement of gas is forward or backward from the point of receipt. It can be argued that all transportation service is performed by displacement as the physical delivery of the same molecules of gas is impossible.

Disposal Well	Well used for disposal of saltwater into an underground formation.

Disposition	The method of accounting for oil or gas production removed from the lease or adjusted production figures to reflect actual stock on hand.

Dissolved (Solution) Gas	Natural gas originally in solution within the reservoir crude oil. As the reservoir pressure is reduced due to production, gas is released from solution in the oil, allowing it to migrate as free gas to a wellbore and be produced or to the crest of the reservoir where it can collect and form a secondary gas cap. In addition, gas is released from solution in the oil within the wellbore as the oil is produced. Thus, most oil wells, except stripper wells producing from reservoirs where the pressure and solution gas has been depleted, produce gas with the oil. Even oil fields with no free gas originally present can produce large volumes of gas since considerable gas can be present in solution in the oil.

Dissolved Gas	Commonly referred to as solution gas. (Refer to solution gas)

Distribution Company	Gas Company which obtains the major portion of its gas operating revenues from the operation of a retail gas distribution system, and which operates no transmission system other than incidental connections within its own system or to the system of another company. For purposes of A.G.A. statistics, a distribution company obtains at least 90 percent of its gas operating revenues from sales to ultimate customers, and classifies at least 90 percent of mains (other than service pipe) as distribution.

Division Order	A contract with a purchaser of oil and gas which directs the payments of oil and gas revenues to the interest owners of a well.

Djeno Blend Crude Oil	Crude oil from Congo with API gravity of * and * % sulfur.

Djeno Crude Oil	Crude oil from Congo (Brazzaville) with an API gravity of * and a sulfur content of * %.

Djeno Export Crude Oil	Crude oil from Congo with an API gravity of 27.6 and a sulfur content of 0.23%.

Doba Crude Oil	Crude oil from Chad with API gravity of * and * % sulfur.

Docket	A formal proceeding with the Federal Energy Regulatory Commission or local Public Utility Regulatory Commission for construction or abandonment of facilities, changes in rates and rulemaking.

Dolphin Crude Oil	Crude oil from Australia with an API gravity of *** .

Dominion Natural Gas Hub	Pennsylvania natural gas hub - 16 pipeline interconnects

Dominion Natural Gas Hub - Mid-Atlantic	Mid-Atlantic natural gas hub

Dominion Natural Gas Hub - North Point	New England natural gas hub

Dominion Natural Gas Hub - South Point	Midwest natural gas hub

Donan Crude Oil	Crude oil from North Sea with an API gravity of * and a sulfur content of * %.

Dorrood Crude Oil	Crude oil from Iran with an API gravity of * and a sulfur content of * %.

Double-Breasted Buying	A practice that pipelines are sometimes accused of employing-buying large packages of gas, and deciding later whether its marketing subsidiary bought it for system supply, or whether its marketing subsidiary bought it for resale on the spot market. Independent marketers complain that this practice gives pipelines an undue advantage in the marketplace. Pipelines counter that their pipeline sales and marketing departments are now completely separate functions.

Douglas Crude Oil	Crude oil from North Sea with an API gravity of * and a sulfur content of * %.

Downstream	This term is used in describing operations performed after those at a point of reference.

Downstream	Any point in the direction of flow of a liquid or gas from the reference point.

Downstream Pipeline	The pipeline receiving natural gas at a pipeline inter-connect point.

Dracut Natural Gas Hub - Massachusetts	Northeast natural gas hub

Draugen Crude Oil	Crude oil from Norway with an API gravity of * and a sulfur content of * %.

DRC Composite Crude Oil	Crude oil from Congo (Dem Rep) with an API gravity of * and a sulfur content of * %.

Drift River Crude Oil	Crude oil from United States Alaska with an API gravity of * and a sulfur content of * %.

Drip	A container or segment of piping placed at a low point in a system to collect condensate, dust, and foreign material, enabling their removal. Also known as Drip Leg and Drip Pot.

Drip Oil	The light oil or hydrocarbon liquids condensed in a piping system when the gas is cooled. Both natural and manufactured gas can be sources of condensates.

Drumright Crude Oil	Crude oil from United States Oklahoma with an API gravity of * and a sulfur content of * %.

Dry Gas	Natural gas that does not have a significant content of liquid hydrocarbons or water vapor. Gas is usually priced on a dry basis.

Dry Hole	Any well that fails to discover oil or gas in paying quantities.

Dry Hole	A well which does not yield gas and/or oil in quantity or condition to support commercial production.

Dual Fuel	An energy use for which there is an alternative fuel.

Dual-Fuel Capability	Ability of an energy-using facility to alternately use more than one kind of fuel.

Dubai Crude Oil	Crude oil from Dubai with API gravity of * and * % sulfur.

Dubai Fateh Crude Oil	Crude oil from United Arab Emeritis (UAE) with an API gravity of * and a sulfur content of * %.

Dubai Mercantile Exchange (DME�)	Energy futures exchange in the Middle East

Dukhan Crude Oil	Qatar crude oil with gravity of ***

Dulang Crude Oil	Crude oil from Malaysia with an API gravity of * and a sulfur content of * %.

Duncan Crude Oil	Crude oil from United Kingdom with an API gravity of * and a sulfur content of * %.

Duri Crude Oil	Crude oil from Sumatra, Dumai, Indonesia with API gravity of * and sulfur content of * %

Durward Crude Oil	Crude oil from North Sea with an API gravity of * and a sulfur content of * %.