The article is devoted to abilities to improve informative value of petrophysical monitoring of reservoir development by integration of different surveillance technics: 1) long-term measurements - passive petrophysical monitoring (applicable for "smart" wells) and 2) traditional active production logging and well-testing procedures, involving sort-term changes in well behavior. Long-lasting draw-down testing while putting wells into production after drilling or long delay are like passive well-tests. Pressure curves are registries by permanent downhole gages and interpreted by widely known pressure and production decline analysis methods. Such passive well-tests are already widely implemented in the company. Passive monitoring in production logging is only starting to implement. It's done on basis of distributed temperature sensing (DTS) by fiber-optic installation in the wellbore. It gives on-line temperature measurements on the while wellbore with relatively high frequency. Temperature measurements accuracy and sensitivity are adjusted by the time of signal averaging. By DTS we can see rapidly changing processes, like temperature changes due to fluid invasion to the wellbore or due to the cross-flows. Active technology there is sort-term well shat-in or cold water injection, and temperature stabilization monitoring.
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