Chalk Project. Oil- and Gas Containing Chalk Reservoirs in the Danish Part of the Central Graben. Pt. 4 I. Capillary Pressure and Structure of Pore Spaces (Preliminary Considerations Based on M-1 Well, Dan Field)

摘要

The purpose of this report is to examine to what extent one can recover structural properties of the porous network from the capillary pressure curves. The definition of the notion of capillary pressure is given expressed as a function of structural parameters of the pores and those pertaining to fluid and fluid-fluid properties. A mathematical model representing the porous network in a highly idealized manner is described (the bundel of capillary tubes model). This model is the main tool used in the process of determination of parameters describing structure of the pores. The last part of the report is devoted to a brief discussion of the obtained results. Appendix 1 contains definitions of the parameters derived from the capillary pressure curves, appendix 2 contains the input and output data of the computer program used in the calculations in a graphical form. (ERA citation 09:015911)