The Cold Heavy Oil Production With Sand

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A methodology has been developed for making low compressive strength cores that will be used to experimentally examine the Cold Heavy Oil Production with Sand (CHOPS) process occurring in unconsolidated oil reservoirs. The main objective is to experimentally model wormhole (high permeability channel) development during CHOPS and investigate the effect of various flow parameters such as core permeability and porosity, compressive strength, oil/water viscosity contrast, confining pressure and injection rate. Modeling the wormhole development and propagation will enable us be able to developing approximate Inflow Performance Relationship (IPR) curves.
Sands blends have been developed by varying the ratios of aggregate, cementing material and water to prepare synthetic cores of compressive strength, permeability and porosity ranging from 500 – 1500 psi, 0.5 – 1.5 Darcy and 20 – 30% respectively. Experimental setup is developed to simulate wormhole propagation during CHOPS process. In this process water is injected at varying range of 0.1 to 10 ml/min using a syringe pump into floating piston accumulator to drive the oil ahead of piston to 2”x 4”synthetic core in core holder at a confining pressure of 500 – 1500 psi. The differential pressure across the core is monitored throughout the process. LabVIEW is used for data acquisition, instrument control, measurement analysis and data presentation.
Compressive strength test, Air Permeability Test and Porosity Test conducted on
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