...A. A. Roslan; N. A. A. Aziz; I. Dzulkarnain; R. D. Tewari; M. Z. Jaafar Summary Polymer gel system has been identified as having the potential for blocking and diverting water flow. However, the current polymer reported an inability to maintain its mechanical strength, limited penetration depth...

...Irina Zahirovic; Petar Skrobonja; Dušan Danilovic Summary This paper focuses on the results of water shutoff operations using polymer gel in the Kelebija oil field. The methodology of candidate wells’ selection and the manner of performing the operation will also be included. The Kelebija oil field...

...Bergit Brattekås; Randy Seright; Geir Ersland Summary Crosslinked polymers extrude through fractures during placement of many conformance‐improvement treatments, as well as during hydraulic fracturing. Dehydration of polymer gel during extrusion through fractures has often been observed...

...Hu Jia; Hao Chen Summary Using mature Cr 3+ /partially hydrolyzed polyacrylamide (HPAM) gel can reduce filtration for water shutoff in the fractured reservoir. Whether the mature gel can act as a fluid-loss-control pill for well-workover operation is worth investigating. In this paper, we start...

... on crosslinking reactions between polymers and crosslinkers. Breaker technologies such as oxidizers, enzymes, fluoride compounds, oxides, vitamins, and decrosslinking agents are used to break the crosslinked polymer-based gels. These materials are added as components of the initial fracturing-fluids recipe...

..., SI was also added to the fracturing gel used to carry the fracturing sand. This paper outlines the selection methods for the inhibitor chemical for application in fracturing fluids in terms of rheology, retention/release, and formation damage, and presents the chemical-return profiles from the five...

... of a newly established steady-state, two-phase chemical-system placement. The experimental procedure is applied to ensure the presence of moveable oil saturation at which the injected DPR fluid (gelant) gels in the treated zone and to quantitatively control the placement-saturation conditions...

...Abdulmohsin Imqam; Baojun Bai; Mingzhen Wei; Hilary Elue; Farag A. Muhammed Summary Millimeter-sized (10-µm to mm) preformed particle gel (PPG) has been used to control water flow through superhigh-permeability zones and fracture zones in mature oil fields. When the PPG is extruded into target...

...Hu Jia; Qiang Ren Summary Previously reported phenol-formaldehyde-based gel formulas with ammonium salt can provide a gelation time between 2 hours and 2 days at 25 °C, which has great potential to serve as water-shutoff or conformance-control agents in ultralow- to low-temperature reservoirs...

... of the gelation process; strength of the formed gel against applied external forces; gel stability; gel shrinkage; and post-gelation-time behavior. This investigation has been conducted for different combinations (gelant systems) of sodium silicate with two types of polymers (a xanthan biopolymer and a low...

...B.. Brattekås; S. G. Pedersen; H. T. Nistov; Å.. Haugen; A.. Graue; J. -T. Liang; R. S. Seright Summary This work investigated the blockage performance of a Cr(III)-acetate-hydrolyzed polyacrylamide (HPAM) gel after placement in open fractures, with emphasis on the effect of gel maturity during...

... effects on the rheological behavior of borate-crosslinked gels is significant. Although these fluids recover their viscosity after shear, they have been observed to lose a significant portion of their viscosity under high pressures. When fracturing deeper wells in hotter reservoirs, the need arose...

...Dimitrios G. Hatzignatiou; Johan Helleren; Arne Stavland Summary Silicate gels have been used in the oil industry mainly for near-well treatments to combat unwanted water production. This technology could be used for mitigating unwanted supercritical carbon dioxide (CO 2 ) leakage out...

...L.. Ouyang; T.. Yango; D.. Zhu; A. D. Hill Summary Fracture fluid damage caused by residual polymer gel in propped fractures results in low fracture conductivity and short effective fracture length, sometimes severely reducing the productivity of a hydraulically fractured well. The residual gels...

... proppant drilling operation sand ratio total fluid Economide Directional Drilling fracture amount Pump Rate actual injection schedule fracture SPE Production fracture treatment hydraulic fracturing isolation gel water cut perforation permeability University Fracturing...

...Ben Xu; A.D.. D. Hill; Ding Zhu; Lei Wang Summary Guar gum and its derivatives have been the most commonly used polymers to increase the viscosity of fracturing fluids. However, the conductivity of many fractures created with guar-based polymers is low because of residual unbroken polymer gel...

... of a fully viscosified scale inhibitor system. The system comprises a purified xanthan viscosify-ing agent, a standard scale inhibitor for downhole scale squeezing, and a breaker to achieve controlled gel breaking down hole. The system has been field tested at Norne field in two long horizontal wells...

... isolation behind the liner were treated with an innovative gel gas-shutoff procedure. The merits of this procedure out-weighed those of other proposed solutions: targeted placement, a strong full-blocking gel to fill up channels behind the liner, inert particles to control fluid loss of the full-blocking...

...Yajun Liu; Phani B. Gadde; Mukul M. Sharma Summary In conventional gel-fracturing treatments, the damage induced by the gel can have a significant impact on well performance, particularly in low-permeability gas formations. Slick-water fracs have been shown to be more successful in some tight gas...

... gels in the matrix reservoir rock that is adjacent to a fracture(s) when oil and water is being co-produced into the treated fracture. 4 4 2006 14 6 2006 19 5 2007 19 5 2007 Copyright 2007, Society of Petroleum Engineers The ability of acrylamide polymers to impart...