Hydrocarbon filling history and reservoir continuity of oil fields evaluated using 87 Sr/ 86 Sr isotope ratio variations in formation water, with examples from the North Sea

1999 ◽  
Vol 5 (1) ◽  
pp. 17-27 ◽  
Author(s):  
E. W. Mearns ◽  
J. J. McBride

CONVERSAZIONES were held this year on 6 May and 24 June. At the first conversazione twenty-four exhibits and a film were shown. Dr P. E. Kent, F.R.S., and Mr P. J. Walmsley of The British Petroleum Company Limited arranged an exhibit demonstrating the latest progress in the exploration for hydrocarbons in the North Sea. The established gas fields and the recently discovered oil fields were shown on maps together with sections which illustrated their structure. Seismic sections and geological interpretations were exhibited to show the type of information being obtained in the North Sea and the structural complexities which arise. A scale model of one of the semi-submersible drilling outfits used in North Sea exploration was on display together with a sample of British North Sea oil.


2020 ◽  
Vol 2 (10) ◽  
Author(s):  
Meysam Nourani ◽  
Niels Hemmingsen Schovsbo ◽  
Ashkan Jahanbani Ghahfarokhi ◽  
Carsten Møller Nielsen ◽  
Lykourgos Sigalas ◽  
...  

Abstract Wettability is usually measured in special core analyses of limited plug samples according to typically costly and time-consuming procedures. For comparative purposes, wettability is considered an index. The two most frequently used wettability indices are the Amott–Harvey wettability index and the U.S. Bureau of Mines (USBM) index. The Amott–Harvey wettability index is linked to imbibition characteristics and the USBM index is associated with the area under capillary pressure curves. To provide a fast analytical method, a mathematical model for predicting the wettability of chalk is presented. The model is calibrated using experimental wettability data and subsequently applied to two wells in Danish chalk oil fields in the North Sea and to outcrop chalk samples. The model supplements traditional labor-intensive laboratory measurements and predicts water wettability variations with depth by modeling both depth and porosity dependencies; in addition, it provides estimates of the effects of the aging time and displacement temperature of chalk wettability measurements in the laboratory.


1990 ◽  
Author(s):  
A.M. Thompson ◽  
G.A.A.H. Holmes ◽  
P.J. Benstead

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