The nature and Occurrence of Geopressured Resources Areas in the State of California

Abstract

The publicly on oil and fields in California a significant and consistent of information which can used to gcoprcssurc. A total of 410 pools have gradients arc considcrcd to be potentially least have pressures distinctly than predicted gradient. 8 pools are wcight records are useful for identifying the top of a geopressured in a wcll: plots shale resistivity versus depth air: used quantify such zones. A lincar corrclation between gradient and the of observed shale resistivity to shale resistivity for given depth, similar those uscd in Gulf region, A probably inadequate for the entire State; which varying conditions, need be developed. and density logs can be used to a correlation which accounts of pressure. n o hctwccn and arc generally within the normal range. The following from the database of 410 potentially geopressured oil and pools: porosity: 20 salinity: 10,000 and 25,000 ppm; depth: 2,000 feet (median value 4,000 feet); 0 and volurnc: 0.1 - 1 billion cubic feet. thickness and estimates represent hydrocarbon pools water aquifers lying them; such,the estimates represent limits. is t.n range from 7.5 to standard cubic barrel. from US to SI units arc found end of the papcr.