GEOCHEMICAL CHARACTERIZATION AND CORRELATIONS OF UPPER HADAR FORMATION CORE AND OUTCROP TEPHRA: NORTHERN AWASH SITE, HOMININ SITES AND PALEOLAKES DRILLING PROJECT (HSPDP)

Three novel species of Bacillariophyta (Diatoms) belonging to Aulacoseira and Lindavia from the Pliocene Hadar Formation, Afar Depression of Ethiopia

Phytotaxa ◽

10.11646/phytotaxa.272.4.1 ◽

2016 ◽

Vol 272 (4) ◽

pp. 235

Author(s):

JOSEPH MOHAN ◽

JEFFERY R. STONE ◽

CHRISTOPHER J CAMPISANO

Keyword(s):

Evolutionary History ◽

Novel Species ◽

Sediment Cores ◽

Core Material ◽

Afar Depression ◽

Sedimentary Deposits ◽

Extant Species ◽

History Of ◽

Drilling Project ◽

Hadar Formation

Paleolake Hadar was an expansive lake in the lower Awash Valley of Ethiopia’s Afar Depression that existed periodically through the Late Pliocene. The sedimentary deposits from this ancient lake (Hadar Formation) have broad importance because a significant number of hominin fossils have been recovered from the formation. Samples of the Hadar Formation lacustrine sequence were collected from sediment cores extracted as part of the Hominin Sites and Paleolakes Drilling Project (HSPDP). A paleoecological study of the HSPDP Northern Awash (Hadar Formation) material has unearthed three novel species of Bacillariophyta (diatoms) from diatomites that appear periodically in the cores. The Hadar Formation assemblage represents a newly revealed excerpt from the evolutionary history of freshwater diatoms in East Africa during the Piacenᴢian age (2.59–3.60 Ma). The HSPDP Northern Awash diatom species are compared to previously reported diatoms from Pliocene outcrops, modern and fossil core material from Lake Malawi, and extant species. Here we describe two new species of Aulacoseira and one of Lindavia. Taxonomic treatment of two diatom varieties reported by previous researchers as Melosira are transferred into Aulacoseira herein.

Preliminary geochemical characterization of a carbonate aquifer: the case of Pollino massif (Calabria, South Italy)

Rendiconti online della Società Geologica Italiana ◽

10.3301/rol.2016.31 ◽

2016 ◽

Vol 38 ◽

pp. 109-112 ◽

Cited By ~ 1

Author(s):

Giovanni Vespasiano ◽

Carmine Apollaro

Keyword(s):

Carbonate Aquifer ◽

Geochemical Characterization ◽

South Italy

Integrated Tubulars Supply Model Provides Cost Savings to Drilling Projects

Proc. Indon. Petrol. Assoc., Digital Technical Conference, 2020 ◽

10.29118/ipa20-f-103 ◽

2020 ◽

Author(s):

M. Hamzah

Keyword(s):

Supply Chain ◽

Cost Savings ◽

Asia Pacific ◽

Potential Cost ◽

Alternative Scheme ◽

Safety Stocks ◽

Storage Location ◽

Supply Planning ◽

Drilling Site ◽

Drilling Project

Classical Oil Country Tubular Goods (OCTG) procurement approach has been practiced in the indus-try with the typical process of setting a quantity level of tubulars ahead of the drilling project, includ-ing contingencies, and delivery to a storage location close to the drilling site. The total cost of owner-ship for a drilling campaign can be reduced in the range of 10-30% related to tubulars across the en-tire supply chain. In recent decades, the strategy of OCTG supply has seen an improvement resulting in significant cost savings by employing the integrated tubular supply chain management. Such method integrates the demand and supply planning of OCTG of several wells in a drilling project and synergize the infor-mation between the pipes manufacturer and drilling operators to optimize the deliveries, minimizing inventory levels and safety stocks. While the capital cost of carrying the inventory of OCTG can be reduced by avoiding the procurement of substantial volume upfront for the entire project, several hidden costs by carrying this inventory can also be minimized. These include storage costs, maintenance costs, and costs associated to stock obsolescence. Digital technologies also simplify the tasks related to the traceability of the tubulars since the release of the pipes from the manufacturing facility to the rig floor. Health, Safety, and Environmental (HSE) risks associated to pipe movements on the rig can be minimized. Pipe-by-pipe traceability provides pipes’ history and their properties on demand. Digitalization of the process has proven to simplify back end administrative tasks. The paper reviews the OCTG supply methods and lays out tangible improvement factors by employ-ing an alternative scheme as discussed in the paper. It also provides an insight on potential cost savings based on the observed and calculated experiences from several operations in the Asia Pacific region.

Initial Reports of the Deep Sea Drilling Project, 15

10.2973/dsdp.proc.15.1973 ◽

1973 ◽

Cited By ~ 35

Author(s):

N.T. Edgar ◽

J.B. Saunders ◽

Keyword(s):

Deep Sea ◽

Drilling Project

10.2973/dsdp.proc.19.1973 ◽

1973 ◽

Cited By ~ 38

Author(s):

J.S. Creager ◽

D.W. Scholl ◽

Keyword(s):

Deep Sea ◽

Drilling Project