The Static High Precision Temperature (SHPT) survey is a combination of special logging equipment used to acquire high resolution temperature profiles and interpretation algorithms, which allow determination of cumulative historical production/injection profiles. SHPT data is usually much more informative compared to conventional temperature log data.
This paper describes the main principles of modern high precision temperature logging and specifications of required hardware and acquisition methods. Special attention is devoted to common mistakes in data acquisition which can mislead in the evaluation of the actual production or injection profile. The paper also outlines the interpretation principles which are based on the fine structure of temperature profiles and its constituent parts such as Local Geothermic Profile Model and Temperature Perturbation Model.
The variety of SHPT applications is presented below by a number of case studies undertaken at different PDO oilfields. They include integrity investigations, identification and localization of fractures, evaluation of reservoir treatment efficiency, identification and localization of injection volumes outside the logging interval or water breakthroughs, identification of bottom water drive and localization of current OWC, cross-well interference, monitoring of water injection/production profile and others. This can seriously improve the selection of work-over candidates and lead to better identification of optimization opportunities.
The application of SHPT surveys for reservoir diagnostics has been demonstrated to be very useful for the most known types of formations, rock types, well completions and reservoir development strategies.