The Experts below are selected from a list of 441 Experts worldwide ranked by ideXlab platform
Faruk Civan - One of the best experts on this subject based on the ideXlab platform.
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Drilling-Induced Near-Wellbore Formation Damage: Drilling Mud Filtrate and Solids Invasion and Mud Cake Formation
Reservoir Formation Damage, 2016Co-Authors: Faruk CivanAbstract:Under- and overbalance Drilling, near-wellbore formation damage, vertical versus horizontal wells, formation damage caused by Drilling and completion fluids, effect of Drilling fluids on shale stability, and mitigation of formation damage induced by completion fluids and crude oil emulsions are discussed. The fundamental processes and their mathematic formulation necessary to develop prediction and simulation models are reviewed for assessment of the damaged zone, Filtrate and fines concentrations, fluid saturations, filter-cake thickness, and Mud loss during Drilling. The models for prediction of damage depth, simulation of the single- and two-phase flow situations in the formation with water- or oil-based Drilling Mud cases, and Mud invasion into naturally fractured formations are described. External particle invasion prior to filter cake buildup and its effect on the formation damage by particle invasion and retention and filter cake formation are explained. These models are demonstrated by various applications, including the estimation of the near-wellbore fluid saturations and resistivity profiles, which are necessary for accurate well-log interpretation, and the Drilling Mud loss into naturally fractured formations.
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Drilling Mud Filtrate invasion improved model and solution
Journal of Petroleum Science and Engineering, 1994Co-Authors: Faruk Civan, Thomas W. EnglerAbstract:An improved model for prediction of Drilling fluid Filtrate concentration in the near wellbore region is developed and solved numerically.
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Drilling Mud Filtrate invasion—improved model and solution
Journal of Petroleum Science and Engineering, 1994Co-Authors: Faruk Civan, Thomas W. EnglerAbstract:An improved model for prediction of Drilling fluid Filtrate concentration in the near wellbore region is developed and solved numerically.
Thomas W. Engler - One of the best experts on this subject based on the ideXlab platform.
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Drilling Mud Filtrate invasion improved model and solution
Journal of Petroleum Science and Engineering, 1994Co-Authors: Faruk Civan, Thomas W. EnglerAbstract:An improved model for prediction of Drilling fluid Filtrate concentration in the near wellbore region is developed and solved numerically.
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Drilling Mud Filtrate invasion—improved model and solution
Journal of Petroleum Science and Engineering, 1994Co-Authors: Faruk Civan, Thomas W. EnglerAbstract:An improved model for prediction of Drilling fluid Filtrate concentration in the near wellbore region is developed and solved numerically.
Jianhua Zhang - One of the best experts on this subject based on the ideXlab platform.
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Time-Dependant Responses of High-Definition Induction Log and Case Studies
Chinese journal of engineering, 2014Co-Authors: Jianhua ZhangAbstract:The process of Drilling Mud Filtrate invading into a reservoir is time dependant. It causes dynamic invasion profiles of formation parameters such as water saturation, salinity, and formation resistivity. Thus, the responses of a high-definition induction log (HDIL) tool are time dependent. The logging time should be considered as an important parameter during logging interpretation for the purposes of determining true formation resistivity, estimating initial water saturation, and evaluating a reservoir. The time-dependent HDIL responses are helpful for log analysts to understand the invasion process physically. Field examples were illustrated for the application of present method.
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A method to evaluate reservoirs and estimate saturation by dynamic responses of dual-induction logging tools
Journal of Petroleum Science and Engineering, 1998Co-Authors: Jianhua Zhang, Jian Oyang, Chun-zeng LinAbstract:Abstract The invasion of Drilling Mud–Filtrate into a reservoir is a dynamic process. Formation-resistivity profiles are therefore invasion-time dependent. The dynamic response model for resistivity logs is established and solved by numerical methods. The present model gives more physical understanding to the invasion process than the conventional step model does. The dynamic resistivity responses are sensitive to the variations of formation–water saturation, hence an effective method to evaluate reservoirs is suggested by history matching the dynamic dual-induction logging readings. Field examples are illustrated that distinguish oil reservoirs, water zones, and oil/water zones, as well as define the oil–water interface by the responses of induction logs at different logging times after Drilling.
V. I. Pen’kovskii - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Drilling Mud Filtrate temperature on the resistivity of the stratum saturated by oil and gas
Journal of Applied Mechanics and Technical Physics, 2014Co-Authors: V. I. Pen’kovskii, N. K. Korsakova, G. V. NesterovaAbstract:A mathematical model of the axisymmetric distribution of the phases in the zone of invasion of the water-based Drilling Mud into the productive stratum whose porous space can simultaneously contain three immiscible fluids (oil, gas, and natural water) is constructed; the model takes into account the high rate of heat transfer between the fluids and the rock matrix. It is shown that the resistivity of the invaded zone depends not only on saturation of the latter by the fluids and the concentration of salts in the water phase, but also on the Drilling Mud Filtrate temperature. It is also shown that there is a jump in the function of stratum saturation by oil on the thermal front.
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The new method of data interpretation of well electromagnetic sounding
Inverse Problems in Science and Engineering, 2010Co-Authors: V. I. Pen’kovskii, N. K. KorsakovaAbstract:The inverse problem was formulated for the set of equations that describe the following processes: Drilling Mud circulate, kinetics of well wall cake growth, penetration of the Drilling Mud Filtrate into stratum, redistribution of immiscible phases with salt exchange between water solutions and the resistivity distribution near the well zone. Both the initial saturation for oil and gas phases and the whole permeability of stratum were the desired values. The problem was solved using gradual step-by-step approach that allowed to minimize mean-square deviation of the theoretical points from the data measured by the equipment such as the high-frequency inductive isoparametric logging tool.
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Phase distribution and intrapore salt exchange during Drilling Mud invasion of an oil- and gas-bearing formation
Fluid Dynamics, 2009Co-Authors: N. K. Korsakova, V. I. Pen’kovskiiAbstract:As a result of Drilling Mud Filtrate invasion of a formation saturated with oil, gas and natural water, the distribution of the immiscible phases and the electrophysical characteristics of the near-well zone change as compared with its initial state. Taking this change into account is necessary for successful interpretation of electrical well logging data. In this paper, on the basis of the equations of immiscible fluid flow through a porous medium and the system of transfer equations with account for instantaneous salt exchange between the Filtrate and the natural water inside the pores, the regions of initial formation fluid saturations for which in the invasion zone the displacement fronts retain their relative position are determined.
N. K. Korsakova - One of the best experts on this subject based on the ideXlab platform.
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Effect of the Drilling Mud Filtrate temperature on the resistivity of the stratum saturated by oil and gas
Journal of Applied Mechanics and Technical Physics, 2014Co-Authors: V. I. Pen’kovskii, N. K. Korsakova, G. V. NesterovaAbstract:A mathematical model of the axisymmetric distribution of the phases in the zone of invasion of the water-based Drilling Mud into the productive stratum whose porous space can simultaneously contain three immiscible fluids (oil, gas, and natural water) is constructed; the model takes into account the high rate of heat transfer between the fluids and the rock matrix. It is shown that the resistivity of the invaded zone depends not only on saturation of the latter by the fluids and the concentration of salts in the water phase, but also on the Drilling Mud Filtrate temperature. It is also shown that there is a jump in the function of stratum saturation by oil on the thermal front.
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The new method of data interpretation of well electromagnetic sounding
Inverse Problems in Science and Engineering, 2010Co-Authors: V. I. Pen’kovskii, N. K. KorsakovaAbstract:The inverse problem was formulated for the set of equations that describe the following processes: Drilling Mud circulate, kinetics of well wall cake growth, penetration of the Drilling Mud Filtrate into stratum, redistribution of immiscible phases with salt exchange between water solutions and the resistivity distribution near the well zone. Both the initial saturation for oil and gas phases and the whole permeability of stratum were the desired values. The problem was solved using gradual step-by-step approach that allowed to minimize mean-square deviation of the theoretical points from the data measured by the equipment such as the high-frequency inductive isoparametric logging tool.
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Phase distribution and intrapore salt exchange during Drilling Mud invasion of an oil- and gas-bearing formation
Fluid Dynamics, 2009Co-Authors: N. K. Korsakova, V. I. Pen’kovskiiAbstract:As a result of Drilling Mud Filtrate invasion of a formation saturated with oil, gas and natural water, the distribution of the immiscible phases and the electrophysical characteristics of the near-well zone change as compared with its initial state. Taking this change into account is necessary for successful interpretation of electrical well logging data. In this paper, on the basis of the equations of immiscible fluid flow through a porous medium and the system of transfer equations with account for instantaneous salt exchange between the Filtrate and the natural water inside the pores, the regions of initial formation fluid saturations for which in the invasion zone the displacement fronts retain their relative position are determined.
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Method of Probabilistic Convolutions for Interpreting Data of Electromagnetic Logging
Journal of Applied Mechanics and Technical Physics, 2003Co-Authors: M. I. Épov, N. K. Korsakova, V. I. Pen'kovskii, I. N. YeltsovAbstract:A new method is proposed for processing the data of electromagnetic logging in wells. The method is based on the hydrodynamic analysis of Drilling Mud Filtrate penetration into the oil stratum, determination of the field of electrical resistances of the near-well zone with its subsequent averaging by convolutions with a kernel in the form of a logarithmically normal distribution of probe sensitivity.
