Download or read book Abnormal Pressures in Hydrocarbon Environments written by B. E. Law and published by AAPG Publications. This book was released on 1998 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The association of abnormal pressures with hydrocarbon accumulations is statistically significant. Within abnormally pressured reservoirs, empirical evidence indicates that the bulk of economically recoverable oil and gas occurs in reservoirs with pressure gradients less than 0.75 psi/ft (17.4 kPa/m) and there is very little production potential from reservoirs that exceed 0.85 psi/ft (19.6 kPa/m). Abnormally pressured rocks are also commonly associated with unconventional gas accumulations where the pressuring phase is gas of either a thermal or microbial origin.