The Experts below are selected from a list of 873 Experts worldwide ranked by ideXlab platform
Olubunmi O Owolabi - One of the best experts on this subject based on the ideXlab platform.
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application of mass balance of Kick Fluid in well control
Journal of Petroleum Science and Engineering, 1991Co-Authors: J A Ajienka, Olubunmi O OwolabiAbstract:Abstract A material balance equation of Kick Fluid in the annulus is derived. This equation can be used to determine the pressure head of the Kick, whether or not the Kick is intermittent or a continuous slug, the volume (or length) of the Kick, the rate of rise of the Kick Fluid, the maximum casing pressure that will be encountered during the well control operation and the annular pressure as the Kick reaches critical points of interest such as the casing seat. When integrated with transient surface shut-in drill stem test analysis techniques, pertinent formation characteristics can be evaluated. These can be useful for optimizing the planning, design and drilling of subsequent wells within the particular field. The model requires a minimum of assumptions and it is dynamic as it is based on the well control process. With speedy and accurate acquisition of the Kick data, well control can become more efficient. The major limitations of the model include possible leakages in the flow system and high gas solubility in the drilling Fluid. The procedure for the application is discussed and examples of a gas Kick and a saltwater Kick illustrate the applicability of the model.
Saeid Jamshidi - One of the best experts on this subject based on the ideXlab platform.
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Two-phase Simulation of Well Control Methods for Gas Kicks in Case of Water and Oil-based Muds
Reaserch Institute of Petroleum Industry, 2018Co-Authors: Yaser Jahanpeyma, Saeid JamshidiAbstract:Kick occurrence is a possible event during a drilling process. It is required to be handled immediately using a well control method to avoid blowout, financial losses and damages to the drilling crew. Several methods including driller, wait and weight, and concurrent are applicable in the drilling industry to control a well during a Kick incident. In this study, typical well control methods were simulated for both cases of water and oil-based muds, and essential parameters such as the required time were calculated. Additionally, for each well control approach, a mathematical algorithm was proposed to simulate the process. In case of oil-based mud, the flash calculation was utilized in each depth and time by considering the effect of Kick Fluid dissolution in drilling mud to improve the accuracy of control parameters. Based on the results, when oil-based mud is used for drilling, extra time is required to control the well due to Kick Fluid dissolution in the mud and extensive changes in the mud density. In order to improve the accuracy of the calculations, critical parameters including temperature changes in the well column, dynamic drilling hydraulics, and pressure drop were considered during a well control process. In addition, the simulation of the concurrent method is one of the study innovations because of mud density alternations especially when the mud becomes heavier by a non-linear or complicated mathematical function during the process
J A Ajienka - One of the best experts on this subject based on the ideXlab platform.
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application of mass balance of Kick Fluid in well control
Journal of Petroleum Science and Engineering, 1991Co-Authors: J A Ajienka, Olubunmi O OwolabiAbstract:Abstract A material balance equation of Kick Fluid in the annulus is derived. This equation can be used to determine the pressure head of the Kick, whether or not the Kick is intermittent or a continuous slug, the volume (or length) of the Kick, the rate of rise of the Kick Fluid, the maximum casing pressure that will be encountered during the well control operation and the annular pressure as the Kick reaches critical points of interest such as the casing seat. When integrated with transient surface shut-in drill stem test analysis techniques, pertinent formation characteristics can be evaluated. These can be useful for optimizing the planning, design and drilling of subsequent wells within the particular field. The model requires a minimum of assumptions and it is dynamic as it is based on the well control process. With speedy and accurate acquisition of the Kick data, well control can become more efficient. The major limitations of the model include possible leakages in the flow system and high gas solubility in the drilling Fluid. The procedure for the application is discussed and examples of a gas Kick and a saltwater Kick illustrate the applicability of the model.
Yaser Jahanpeyma - One of the best experts on this subject based on the ideXlab platform.
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Two-phase Simulation of Well Control Methods for Gas Kicks in Case of Water and Oil-based Muds
Reaserch Institute of Petroleum Industry, 2018Co-Authors: Yaser Jahanpeyma, Saeid JamshidiAbstract:Kick occurrence is a possible event during a drilling process. It is required to be handled immediately using a well control method to avoid blowout, financial losses and damages to the drilling crew. Several methods including driller, wait and weight, and concurrent are applicable in the drilling industry to control a well during a Kick incident. In this study, typical well control methods were simulated for both cases of water and oil-based muds, and essential parameters such as the required time were calculated. Additionally, for each well control approach, a mathematical algorithm was proposed to simulate the process. In case of oil-based mud, the flash calculation was utilized in each depth and time by considering the effect of Kick Fluid dissolution in drilling mud to improve the accuracy of control parameters. Based on the results, when oil-based mud is used for drilling, extra time is required to control the well due to Kick Fluid dissolution in the mud and extensive changes in the mud density. In order to improve the accuracy of the calculations, critical parameters including temperature changes in the well column, dynamic drilling hydraulics, and pressure drop were considered during a well control process. In addition, the simulation of the concurrent method is one of the study innovations because of mud density alternations especially when the mud becomes heavier by a non-linear or complicated mathematical function during the process
Choe Jonggeun - One of the best experts on this subject based on the ideXlab platform.
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Dynamic well control simulation models for water-based muds and their computer applications
Texas A&M University. Libraries, 1995Co-Authors: Choe JonggeunAbstract:Vita.A Kick is defined as an unscheduled flow of formation Fluids into a wellbore. Four well control simulation models have been developed in this research to study the behavior of Kicks during well control operations. A single-phase well control model assumes that a Kick Fluid enters into a wellbore as a single-phase slug and remains as a single-phase slug throughout the well control operations. This model is easy to simulate and is useful for sensitivity analysis. A two-phase well control model has been developed to analyze accurately the behavior of Kick Fluids based on realistic assumptions. Two new sets of finite difference equations have been derived and utilized to handle variable flow geometries. The two-phase model couples mud flow with gas influx from an infinite acting reservoir. Although the two-phase model is realistic, several numerical problems such as numerical dissipation, negative liquid velocity, instability of time step and grid sizes, and divergence due to a distinct two-phase flow map have been exposed. An alternative two-phase well control model is proposed after comparing the dynamic two-phase model and the single-phase model. This model has been modified from the single-phase model to avoid any numerical problems that might occur in a two-phase well control model. Good matches between the alternative model and the two-phase model have been achieved for wide data ranges by considering the gas rise velocity and dynamic two phase mixture effects at the beginning of the Kick. A user-interactive well control simulator has been developed for IBMTM compatible personal computers for use as a well control training and educational tool. The simulator utilizes the alternative two-phase model proposed in this study. The simulator has enhanced graphical presentations and animations to demonstrate the basic concepts and sequences of Kicks and well control operations. The simulator can handle several different well trajectories: vertical, directional, and horizontal wells including an extended reach well. Therefore, the simulator is also useful for well planning. The simulator can model the following Kick and well control procedures in detail: drilling, taking a Kick, detecting a Kick, well shut-in, well stabilization, gas migration after well stabilization, and old mud or kill mud circulation. It also checks for possible underground blowout and pump failure. Finally, a theoretical kill sheet is proposed and compared with a conventional kill sheet
