X-RAY EVIDENCE FOR CAPILLARY PRESSURE DRIVEN FLOW IN PRESERVED CORE FROM THE GEYSERS

mproved understanding of fluid storage and transport nechanisms relevant to The Geysers reservoir is 'undamental to efficient and economic long term iroduction of steam. X-ray computed tomographs of:ore from research borehole SB-15D made within 72 lours of drilling show characteristic x-ray attenuation irofiles that can only be explained by imbibition of killing fluid at reservoir conditions. The shape of the irofile is highly diagnostic. Early time scans, when nterpreted taking into account independent neasurements of pore size distribution, permeabilities ind capillary pressures for the rock matrix sampled by 3B-15D, are consistent with strong capillary suctions for the recovered rocks. This indirect indication of mbibition under reservoir conditions, along wit