•Accurate information retrieval is essential to the success of the drilling operation, particularly during exploration drilling
•The chemical and physical properties of the mud affect evaluation –During drilling mud loggers retrieve samples for evaluation
–After drill electric logs must be run in the hole to further evaluate the wells economics
–Logging may be performed while drilling using LWD (Logging While Drilling) tools
–Drill stem test may need to be completed
–Core may have to be cut
•All these techniques and tools may be affected by the mud properties both chemical and physical
–If the cuttings are dispersed mud loggers will have difficulty evaluating cuttings
–Additives (such as lubricants and asphalts) may mask oil shows –Certain electric logs require conductivity through the drilling fluid –Washouts will affect DST packer seats –Poor hole cleaning will make coring difficult
•The chemical and physical properties of the mud affect evaluation –During drilling mud loggers retrieve samples for evaluation
–After drill electric logs must be run in the hole to further evaluate the wells economics
–Logging may be performed while drilling using LWD (Logging While Drilling) tools
–Drill stem test may need to be completed
–Core may have to be cut
•All these techniques and tools may be affected by the mud properties both chemical and physical
–If the cuttings are dispersed mud loggers will have difficulty evaluating cuttings
–Additives (such as lubricants and asphalts) may mask oil shows –Certain electric logs require conductivity through the drilling fluid –Washouts will affect DST packer seats –Poor hole cleaning will make coring difficult
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