Abstract

Historically, the terms “resources” or “total resources” have been taken to include everything from undiscovered/discovered, unrecoverable, produced to remaining recoverable. Terminology needs to be refined because net-to-gross is inadequate as a descriptor. A proposed scheme would be net sand, net reservoir and net pay. There is no universal perception of the role of net pay in integrates reservoir studies, no standard definition of net pay, no unified industry protocol for determining net pay and no common practice for defining cutoffs. Better practice would include an honor scale where interpretative algorithms are applied at the scale at which they were established. Making use of reservoir analogues with the correct data, petrophysical analogues require core data or at least conventional core measurements. Ground truthing should be exercised where feasible with XRD for shale volume fraction and core-extracted water saturation.

Keywords: Cut-offs • permeability • primary depletion • waterflood depletion

Presented at: 2009 South East Asia Petroleum Exploration Society (SEAPEX) Conference, Singapore, 2009