SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "L773:1000 9515 "

Sökning: L773:1000 9515

  • Resultat 1-10 av 15
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  •  
3.
  • Can, Yang, et al. (författare)
  • Amplitude Variation with Offset Responses Modeling Study of Walkaway Vertical Seismic Profile Data at CO(2) Geological Storage Site, Ketzin, Germany
  • 2011
  • Ingår i: Acta Geologica Sinica. - 1000-9515 .- 1755-6724. ; 85:5, s. 1118-1126
  • Tidskriftsartikel (refereegranskat)abstract
    • An important component of any CO(2) sequestration project is seismic monitoring for tracking changes in subsurface physical properties, such as velocity and density. Different reservoirs have different amplitude variation with offset (AVO) responses, which can define underground conditions. In the present paper we investigate walkaway vertical seismic profile (VSP) AVO response to CO(2) injection at the Ketzin site, the first European onshore CO(2) sequestration pilot study dealing with research on geological storage of CO(2). First, we performed rock physics analysis to evaluate the effect of injected CO(2) on seismic velocity using the Biot-Gassmann equation. On the basis of this model, the seismic response for different CO(2) injection saturation was studied using ray tracing modeling. We then created synthetic walkaway VSP data, which we then processed. In contrast, synthetic seismic traces were created from borehole data. Finally, we found that the amplitude of CO(2) injected sand layer with different gas saturations were increased with the offset when compared with the original brine target layer. This is the typical class III AVO anomaly for gas sand layer. The AVO responses matched the synthetic seismic traces very well. Therefore, walkaway VSP AVO response can monitor CO(2) distribution in the Ketzin area.
  •  
4.
  • Dalsätt, Johan, et al. (författare)
  • A New Enantiornithes (Aves) from the Early Cretaceous of China
  • 2014
  • Ingår i: Acta Geologica Sinica. - : Wiley. - 1000-9515 .- 1755-6724. ; 88:4, s. 1034-1040
  • Tidskriftsartikel (refereegranskat)abstract
    • A new bird from the early Cretaceous Yixian Formation of Liaoning, China is described. This new species, Grabauornis lingyuanensis, shares several synapomorphies with the Enantiornithes. The specimen is relatively well preserved. The skeletal morphology of Grabauornis bears close resemblance to that of other Chinese members of this clade. The brachial index (the ratio between the lengths of humerus and ulna) is 0.95, which is close to the average for enantiornithine birds. It indicates that Grabauornis was a rather good flyer, and the presence of an alula in the wing further testifies to this.
  •  
5.
  •  
6.
  •  
7.
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 15

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy