... Abstract Fluid diversion gels, normally formed from polymer/crosslinker gelants, are often used to control injected water in oil-bearing formations. Injected fluid diversion becomes more important, and well treatment design requirements more challenging, in naturally fractured carbonate (NFC...

... Abstract Since the potential of relative permeability modifying (RPM) gels for water shut-off was discovered, many researchers focused on understanding the mechanisms by which, these gels perform their disproportionate permeability reduction (DPR) behavior. The focus on this concept...

... Abstract Gel and microfine Cement treatment have been pumped for production well WOR reduction. There have been cases where treatment has been pumped and results were below expectations. This paper describes an innovative approach in water control that enable reduction in water production...

... ). A favorable formed cross-linked gel is a dependent of choices among different factors. A good candidate is one, which its viscosity can be controlled. Some factors that govern the final viscosity of a cross-linked gel are concentrations of crosslinkers and pH. Some clays are sensitive to pH and they can swell...

... polymer gel, and three different chase fluids (water, surfactant or CO 2 foam) was investigated as an integrated EOR approach. Waterflood oil recovery was low with poor sweep efficiency and oil production from the fracture volume only. Fracture conductivity was significantly reduced after polymer gel...

... Abstract In oil industry, it is important to decrease water production and improve oil sweep efficiency. A newer trend in gel treatments is using preformed particle gel (PPG) to reduce fluid channels through super-high permeability streaks/fractures. The success of a PPG treatment depends...

... Abstract The oil reservoirs in Turkey generally produce from naturally fractured carbonates with high WOR's. This high WOR easily causes rapid decline in oil rates, especially with heavy oil of about 18-20° API. As crosslinked polymer gels are one of the major means to remedy this problem, gels...

... along fracture paths. The field-observed response on fracture shut-off by gel injection into the water injectors provided a good opportunity to learn more on the fracture geometry, aiming for the formulation of general guidelines for an efficient water flood in naturally fractured reservoirs...

... increasing conformance by flooding or by steam-heat treatment. Promising are such physico-chemical methods, in which heat energy of the formation or that of the injected heat carier is used to generate in situ alkaline buffer systems and CO 2 , as well as to form gels capable to increase oil displacement...

... gel fracturing fluid concentration reservoir pressure proppant Copyright 1998, Society of Petroleum Engineers Inc. This paper was prepared for presentation at the 1998 SPE European Petroleum Conference held in The Hague, The Netherlands, 20 22 October 1998. This paper was selected...

... gel treatment, cement squeeze and mechanical isolation. The polymer gel systems have several important advantages in comparison with other methods: – The polymer system is injected as a solution and can penetrate deep in the reservoir and reduce permeability in the near wellbore area...

... Abstract Historically, enzymes have been used in the oil industry both for improving the characteristics of a range of biopolymers employed in the industry and as breakers for biopolymer gels. Until recently, the use of enzymes downhole was limited to gel breaking applications where suitable...

... fluids and a relatively low-viscosity, sheared and filtered 40-lb/Mgal gel as the gravel carrying medium. A total of 12 frac-and-packs were completed in the primary producing layers; the proppant amounts placed in the induced fractures varied from 3,000 to 22,000 lb. This placement resulted in simulated...

... ABSTRACT Extended-life polymer gel plugs have met rigorous requirements as a sealant for restoring a barrier in the tubing annulus when tubing-annulus leakage has occurred. These requirements include urgency to restore annulus integrity, dynamic placement in unbalanced well conditions, and ease...

..., originally intended to optimise the main-frac pumping schedule, a conservative approach was taken to the design of the proppant placement operation. The proppant was placed using a high viscosity non-linear gel. Consideration of both mini-frac and main-frac operations along with evidence from diagnostic...