Log Type Log Name Curve Characteristics Interpretation Lithology Logs Gamma Ray & Spontaneous Potential (SP) Deflection to the right Shale Deflection to the left Sand Resistivity Logs Deep Resistivity High Hydrocarbons Tight Streaks Low porosity Low Shale Wet Sand Separation between the resistivities Formation and drilling fluids are different Formation is permeable Porosity Logs Density … Continue reading Short Cut Interpretation
Tag: Logs
Short Spaced Resistivity
Short Normal The usefulness of the curve will be determined by the vertical resolution. The short normal (SN) is useful as long as the contrasts between the drilling fluid and formation resistivities are not too great. Resistivity beds will appear thinner by the arm spacing (16ins.), and conductive beds appear thicker by the same amount. … Continue reading Short Spaced Resistivity
Porosity Logs
Sonic Log Essentially it emits a sound pulse and has a receiver that picks up the sound pulse as it passes the receiver. This produces a transit time and generates a wave form that can be interpreted. In the sonic log the velocity of the wave form through the rock matrix will help to determine … Continue reading Porosity Logs
Intro To Logging
Introduction The logging of a well bore is the process of measuring the electrical resistivity of the surrounding formation and the fluids within. It is known that the electrical resistivity of rock is high however the resistivity of minerals and fluids that occupy the pore spaces of said rock have proven to be low in … Continue reading Intro To Logging