Drilling operations for Oil and gas. comprehensive notes

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What is Formation Evaluation? Formation Evaluation (FE) is the process of interpreting a combination of measurements taken inside a wellbore to detect and quantify oil and gas reserves in the rock a... djacent to the well. FE data can be gathered with wireline logging instruments or logging-while-drilling (LWD) or measurement-while-drilling (MWD) tools. Data is organized and interpreted by depth and represented on a graph called a log (a record of information about the formations through which a well has been drilled). So, why do we need FE? We need FE to evaluate hydrocarbon reservoirs and predict oil recovery, to provide the reservoir engineers with the formation’s geological and physical parameters necessary for the construction of a fluid-flow model of the reservoir, measuring of in-situ formation fluid pressure and acquisition of formation fluid samples, as well as to determine the ability of a borehole to produce petroleum especially in petroleum exploration. Mud Logging Mud logging (or Wellsite Geology) is a well logging process in which drilling mud and drill bit cuttings from the formation are evaluated during [Show More]

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