... Abstract The paper demonstrates a water shutoff technology in naturally fractured reservoir, which is based on simultaneous placement of a polymer gel and foam in fracture, where foam is stabilized by delayed formed gel. Lab studies were undertaken to develop a gelled foam formulation...

... what conditions the microbubbles will or will not block the pores (e.g. foam quality, viscosity, fluid composition, pressure). Both the microbubble diameter and the rock pore size distribution play roles in determining sealing of the pores. In order to gain an appreciation of the pore blocking...

... Abstract Foam is one of the most frequently used drilling fluids at underbalanced drilling operations. This paper introduces more accurate model than existing models for estimating pressure drop of foam flowing through the bit. The major difference between the proposed and the existing models...

... Abstract In this study, a 1-D transient state mechanistic model of cuttings transport with foam in inclined wells has been developed. The model is solved numerically to predict the optimum foam flow rate (liquid and gas rate) and rheological properties that would maximize cuttings transport...

... Abstract When drilling underbalanced, the pressure of the drilling fluid is maintained at a value below the formation pressure. In order to lower well pressure, specific low density fluids are needed i.e. gas, aerated mud or foam. Foam is particularly beneficial for drilling mainly due to its...

... recoveries in matrix and fractured cores. Additional improvement in oil recovery was obtained by implementing conformance control methods such as foams, gels, and gel-foams. Injecting blocking and diverting gels into the fractured cores proved to be the most effective means of conformance control, providing...

... gas segregates as a result of its higher mobility. This condition may cause reduced oil production rates, loss of drive energy, loss of recoverable oil, and problems with fluid processing. Use of foam as mobility-control fluid has shown promise in a wide range of EOR techniques including steam...

... Abstract In this study, a 1-D unsteady-state two-phase mechanistic model of cuttings transport with foam in vertical wells has been developed. The model is solved numerically to predict the optimum foam flow rate and rheological properties to maximize the cuttings transport efficiency...

... Abstract The foam-drive process has been considered in the oil and gas industry as an enhanced oil recovery method. However, practical application of this process is rather restricted. The main limitation of foam field application is the complexity of its flow behavior in porous media...

... Abstract This study describes a pore level approach taken to investigate the complex flow of foamed gels in porous media. Foamed gels can be used as blocking agents to control excessive gas or water production in oil reservoirs. Although the use of foamed gels as plugging agents has been...

... Abstract While much is known about foam performance in porous media some key knowledge-gap areas remain, one of which is the relationship between surfactant and foam performance in porous media. We compare the viscosities of two different types of polymer-thickened foams in laminar pipeline...