Cretaceous formation

(Geol.) the series of strata of various kinds, including beds of chalk, green sand, etc., formed in the Cretaceous period; - called also the chalk formation. See the Diagram under Geology.

See also: Cretacic

References in periodicals archive ?
Sarir was found in 1961 by BP in an Upper Cretaceous formation (Fm).
AOC) of Japan, is a 10x7 km field containing sour oil and over 35 TCF of non-associated gas from a Middle Cretaceous formation.
The licence also includes a find in the Cretaceous formation which will be separated and retained by Noreco.
Sarir field was found in 1961 by BP at a depth of 9,000 feet in an Upper Cretaceous formation (Fm).
In the stratigraphic segmentation of Cretaceous Formation of the Ohre region elaborated by M.
Penetrating only the Lower Cretaceous Formation, this well was perforated by the Soviets from 1,051m to 1,054m and from 1,134m to 1,139m, and flowed at 135 bopd on a 9mm choke and 365 bopd on a 5mm choke respectively.
Testing in the Lower Cretaceous formation resulted in no measurable flow of hydrocarbons to surface due to the lack of an extensive connected fracture network at this location.
It is recorded as a discordance between the synclinal structure of the ISS and platform-like Cretaceous formation (Fig.
The KG#11 well was drilled to a total depth of 2,875 meters and the results of this stratigraphic test of the northern portion of the KG Block successfully established the presence of multiple reservoirs within the Upper Cretaceous formation and the newly defined prospective rift filled sequence of possible Permo-Triassic Age.
In late 2000 Inelectra had made a major oil discovery on the block as its Punta Sur IX well tested 3,300 b/d of 19o API oil from a Cretaceous formation at a depth of 8,200 feet.
The primary target for this well is the Cretaceous formation at 4,500 metres, but secondary objectives include the shallower Eocene, Oligocene and Sarmatian sequences.