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This post is an elaboration of the  "Basic Logging Interpretation" slide  which I share in my previous post  [CLICK HERE ] . This explanation will  fit the best if you want to present the  " Basic Logging Interpretation"  slide  at page 7 It is very important to understand that the resistivity log which has high resistivity measurement doesn't always detect the hydrocarbon containing zone. There are two possibilities: first, the low resistivity zone might contain low resistivity fluid, which is hydrocarbon, and if that is the case, we have found our sweet pay zone. But second, the formation might be very small in porosity that the resistivity measurement becomes low. Most of the rock is nonconductive to the electricity, so when the porosity of the rock is very small, there will only small quantity of fluid in the rock. Even when the fluid is very conductive, since the quantity is small, the log will show low resistivity measurement. That is why, the

This post is an elaboration of the  "Basic Logging Interpretation" slide  which I share in my previous post  [CLICK HERE ] . This explanation will  fit the best if you want to present the  " Basic Logging Interpretation"  slide  at page 6 Basic: Why the Logging Results Should Show The Permeability? Because the permeability of the rock represent the capacity of the rock to flow the fluid through it, it is very common that a wellbore be checked by logging tools to measure the permeability of some interesting place of the zone. For more detailed technical and scientific information about permeability, see my previous post here . So since a low permeability rock will hardly flow fluid through them and high permeability rock will flow fluid easily, people will check the logging result whether they can find high permeability zone with low resistivity. So, People Will Look For High Permeability Zone Which Contains Hydrocarbon! Exactly! Perme

This post is an elaboration of the  "Basic Logging Interpretation" slide  which I share in my previous post  [CLICK HERE ] . This explanation will  fit the best if you want to present the  " Basic Logging Interpretation"  slide  at page 4   Well logging is an important job in Oil and Gas industry.  It uses sophisticated tools, equipments, devices and software, The interpretation will be done by professional earth scientists with precision as it is very important in formation evaluation. That is why there are many trainings, seminars and handbooks of well logging, which are reasonably high in price, to make sure people contributing in well logging jobs are capable in using the software and basic procedure to get the representative results of the formation. The slide ppt (ppsx) of basic interpretation in well log results has been shown in this blog, but to elaborate it, we should know the tools, procedures, and simple facts in the field that is importa

Introduction Logging is one powerful method to measure physical properties of the formation around borehole to make sure whether we are lucky enough to drill through petroleum bearing zone!   Logging is done by lowering a logging tool into the borehole and recording formation properties while the tools are rolled up to the surface. These logging tools can be divided into broad categories based on the physical properties measured. The tools use variety of sensors to measure different properties such as gamma ray, electrical, acoustic, radioactive responses, electromagnetic, pressure and other properties of the formation rock and fluid. Since the tools are rolled up to the surface while recording the data, the record could be seen continuously as a function of depth. These data will represent a lot of formation properties depend on what properties are the tools measure from the borehole. These data then should be interpreted to get its main goal: to know the condition of the f