Shale gas and Snake oil: Geological assessment for continuous petroleum resources in some European countries
Author
Nikolov, Kristiyan Valeriev
Term
4. term
Education
Publication year
2014
Submitted on
2014-06-06
Pages
120
Abstract
Skifergas er naturgas fanget i finkornede bjergarter. At vurdere, hvor meget der kan udvindes, kræver en konsekvent metode og indsigt i bjergartens mikroskopiske struktur. Denne afhandling præsenterer en metode til at evaluere skifergasressourcers potentiale i Danmark og Bulgarien. Den undersøger nanoskala pore- og porehalsstrukturer—netværket af ekstremt små porer og smalle forbindelser, som lagrer gas og styrer, hvordan den kan bevæge sig—samt egenskaberne ved adsorptionsisotermer, som beskriver, hvor meget gas binder sig til bjergartens overflade ved forskellige tryk ved en given temperatur. Ved at samle disse elementer giver arbejdet en klar og sammenlignelig ramme for at estimere ressourcepotentiale og forstå, hvordan lagrings- og strømnings-egenskaber påvirker vurderingerne i begge lande.
Shale gas is natural gas trapped in fine-grained rocks. Estimating how much might be recoverable requires a consistent assessment method and an understanding of the rock’s microscopic structure. This thesis presents a methodology for evaluating shale gas resource potential in Denmark and Bulgaria. It examines the nano-scale pore and pore-throat system—the network of extremely small pores and narrow connections that store gas and regulate how it can move—and the characteristics of adsorption isotherms, which describe how much gas attaches to the rock surface at different pressures at a fixed temperature. By bringing these elements together, the work provides a clear, comparable framework for estimating resource potential and for understanding how storage and flow properties influence those estimates in both countries.
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