Foam drilling simulator

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Title: Foam drilling simulator
Author: Paknejad, Amir Saman
Abstract: Although the use of compressible drilling fluids is experiencing growth , the flow behavior and stability properties of drilling foams are more complicated than those of conventional fluids . In contrast with conventional mud , the physical properties of foam change along the wellbore . Foam physical and thermal properties are strongly affected by pressure and temperature . Many problems associated with field applications still exist , and a precise characterization of the rheological properties of these complex systems needs to be performed . The accurate determination of the foam properties in circulating wells helps to achieve better estimation of foam rheology and pressure . A computer code is developed to process the data and closely simulate the pressure during drilling a well . The model also offers a detailed discussion of many aspects of foam drilling operations and enables the user to generate many comparative graphs and tables . The effects of some important parameters such as : back -pressure , rate of penetration , cuttings concentration , cuttings size , and formation water influx on pressure , injection rate , and velocity are presented in tabular and graphical form . A discretized heat transfer model is formulated with an energy balance on a control volume in the flowing fluid . The finite difference model (FDM ) is used to write the governing heat transfer equations in discretized form . A detailed discussion on the determination of heat transfer coefficients and the solution approach is presented . Additional research is required to analyze the foam heat transfer coefficient and thermal conductivity .
URI: http : / /hdl .handle .net /1969 .1 /4792
Date: 2007-04-25

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Foam drilling simulator. Available electronically from http : / /hdl .handle .net /1969 .1 /4792 .

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