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Resistivity environmental corrections
Resistivity tool responses generally must be corrected for a variety of factors; namely, borehole effects, bed thickness, and invasion. Micro-resistivity measurements must be corrected for the presence of mudcake. Resistivity...
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GR & SP corrections
1.Gamma ray correction:- Gamma ray log is subjected to number of effects like: - Sonde position in the hole. Hole size. Mud weight. Casing size and weight. Cement thickness Since there are innumerable...
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Logging tools environmental corrections
In real world logging ,its not easy to determine true gamma ray, neutron porosity,bulk density and true resistivity of the uninvaded zone precisely for variety of reasons. There are various Factors affecting these...
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Mud logging unit equipment’s
Total Gas Analyzer (TGA):-Total gas analyzer measures total quantity of available gas.TGA provides continues measurement of gas counts.The equipment uses flame ionization detector or thermal conductivity detector.Gas quantity provided by TGA...
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Water based drilling mud
Water Base Mud (WBM) are generally less expensive and less difficult to maintain as compared to Oil Based Mud (OBM).Although WBM is less expensive but they sometime cause issues related...
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Oil based drilling mud
Base fluid in Oil based mud is oil as an continues phase,it also contains some water but as dispersed phase.Base Oil in OBM could be diesel,kerosene,fuel oil or mineral oil.Water...
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Reserve Estimation
Volumetric Reserve estimation involves integration of geological data with reservoir geometry .Recoverable reserve is the volume of hydrocarbon that can be profitably produced from the reservoir. Reserve estimation can be done...
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Log quality control procedure
Log Quality Check:- Quality check of all logs available is first step before starting any interpretation.Given below are the details of basic quality check that should be performed on log.Details...
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Spontaneous Potential Logs
Spontaneous potential (SP) results due to two factors which are 1. salinity difference between formation connate water and mud filtrate (liquid junction potential) 2.Presence of ion selective shale membrane(membrane potential)....
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Resistivity tools
Induction logging tools were designed to work in oil-based drilling mud as laterolog does not works in the absence of conductive medium.In their simplest form induction tools are made of...
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