Two-Phase Flow Analysis-SFE (Staged Field Experiment) No. 1 Core

摘要

Eleven Travis Peak sandstone core samples from the Holditch Howell No. 5 well, designated GRI Staged Field Experiment (SFE) Number 1, were analyzed in the laboratory at IGT for porosity, permeability, stress dependence of permeability, and the relationship of these to observable features in the pore geometry. Dry permeabilities of the SFE 1 core received by IGT ranged from about 20 microdarcies to about 30 millidarcies, and gas porosities ranged from 8% to 18%. Despite the difficulties inherent in manual flow measurements, the authors were able to collect enough data to assemble a number of observations on the relationships between the pore geometry of higher permeability tight sands and gas movement through the pores. Mercury porosimetry data indicate that the SFE 1 samples represent a transition zone in pore geometry between 'slot pore' tight sands and 'grain-supported' pores found in conventional sandstones. The authors believe that recognition of the petrologic properties of transitional sands will help improve the ability to assess tight sandstone reservoir quality.