Pore pressure in unconventional formations
AssigneeSaudi Arabian Oil Company
InventorMohammed Boudjatit
Life of this patent
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Abstract
Disclosed are methods, systems, and computer-readable medium to perform operations including: receiving a density log and a compressional slowness log measured in a wellbore located in a formation; generating, based on at least one of the density log or the compressional slowness log, a reference compressional slowness log; determining, for an interval in the formation, a relationship between the compressional slowness log and the reference compressional slowness log; generating, based on the relationship and known pressure information in the interval, a pressure scale for the formation; and using the pressure scale to calculate pressure in the interval.
Claims13
A non-transitory computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:
- receiving a density log and a compressional slowness log measured in a wellbore located in a formation;
- generating, based on the density log and the compressional slowness log, a reference compressional slowness log;
- determining, for an interval in the formation, a relationship between the compressional slowness log and the reference compressional slowness log;
- generating, based on the relationship and known pressure information in the interval, a pressure scale for the formation;
- and
- using the pressure scale to calculate pressure in the interval.
A system, comprising:
- one or more processors;
- and
- a non-transitory computer-readable storage medium coupled to the one or more processors and storing programming instructions for execution by the one or more processors, the programming instructions instructing the one or more processors to perform operations comprising:
- receiving a density log and a compressional slowness log measured in a wellbore located in a formation;
- generating, based on the density log and the compressional slowness log, a reference compressional slowness log;
- determining, for an interval in the formation, a relationship between the compressional slowness log and the reference compressional slowness log;
- generating, based on the relationship and known pressure information in the interval, a pressure scale for the formation;
- and
- using the pressure scale to calculate pressure in the interval.
Dependencies are inferred from the claim text.