Determination of pore type-throat size relationships in sandstones and their implications in terms of diagenesis and petrophysics
Thesis/Dissertation
·
OSTI ID:6976690
Porosity types derived from measurements of pore size, shape and connectivity in thin section are demonstrated to be associated with specific pressure ranges of mercury injection curves. Since the injection pressure necessary to invade a pore throat with mercury is a function of the radius of the throat, relating porosity types to pressure intervals means each individual pore type seen in thin section can be directly linked with a specific throat size range. This combination of mercury porosimetry and thin section petrography allows us to actually determine the size, type, spatial distribution, and pore wall mineralogy of pores associated with throats of a certain size, removing much of the ambiguity involved in the interpretation of mercury injection curves. This paper documents variation in the nature and degree of pore-throat association in various sandstones reservoirs. Each reservoir can be quantified in terms of three parameters which describe the nature and degree of pore-throat association and pore size to throat size ratio. These parameters have been linked to both petrophysical response and diagenetic processes.
- Research Organization:
- South Carolina Univ., Columbia (USA)
- OSTI ID:
- 6976690
- Country of Publication:
- United States
- Language:
- English
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