دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a reef or mound built by small organisms and their remains, such as coral, plankton, and oysters. Originally a waveresistant coral structure served as an anchor for calcareous debris that formed limestone. It was tectonically submerged, or the sea level rose faster than the corals could build it, and it was eventually buried beneath marine shales. A bioherm is often porous enough to hold large accumulations of hydrocarbons, especially if it has been dolomitized. A bioherm is a stratigraphic trap.

n: a cash payment by the lessee for the execution of an oil and gas lease by the mineral owner;expressed as dollars per acre. Occasionally, an oil payment or overriding royalty may be reserved as a bonus by a lessor in addition to regular royalty.

n: A kind of clay containing concave-convex rabdolith.

n: a chemical combination of calcium, magnesium, carbon, and oxygen, CaMgCO3. It is the main constituent of dolomite. Compare calcium carbonate.

n: 1. a salt of carbonic acid. 2. a compound containing the carbonate radical (CO3) 3. a carbonate rock.

n: The different carbonate of alkaline earth element.

any of the many rocks composed of calcium carbonate (limestone) or magnesium carbonate (dolomite) or other acid soluble rocks with a common CO3-2 ionic charge. The pores may be poorly connected and matrix permeability (non fractures) are often much lower

n: a sedimentary rock composed primarily of calcium carbonate (calcite) or calcium magnesium carbonate (dolomite).

n: A kind of sedimentary rock whose content of carbonate is over 50%. Mainly consisted of calcite, dolomite and ankerite.

n: (DOl) a federal department set up as the nations principal conservation agency. The DOl is responsible for nationally owned lands and natural resources. It fosters wise use of land and water resources, protects fish and wildlife, preserves the environmental and cultural values of national parks and historic places, and provides for the enjoyment of life through outdoor recreation. Address: 1849 C Street NW;Washington, DC 20240;(202) 208- 3100.

n: taking account of future value in present calculations, i.e., determining present value of future dollars. Discounting is compounding in reverse.

abbr: Department of the Interior.

n: see pipe dolly.

n: A small handcart used to carry the casings to the drill platform