... 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 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...

... formations contain some clays that are sensitive to high pH so a crosslinker capable of reacting with the linear gel at low pH is favorable. Furthermore, it has been found that low pH environment is less damaging to sandstone formations with low permeability and also can improve polymer hydrolysis...

... the mid-section of the open hole section: from 2,120m MD/RT to 2,163m MD/RT Below figure in the Appendix 3 locates the water entry in the well profile. Abstract Gel and microfine Cement treatment have been pumped for production well WOR reduction. There have been cases where treatment has been...

... 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...

... to production wells 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...

... 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...

... procedure drilling fluid formulation methanol upstream oil & gas extended-life polymer gel plug plug placement production monitoring casing and cementing drilling fluid selection and formulation bottomhole pressure lbm 1000 well 214 strength downhole intervention drilling...

... testing upstream oil & gas fracturing fluid fracturing materials proppant flow rate gel Abstract A proppant placement experiment was carried out in February 1989 at the Rosemanowes Research Site in Cornwall, England. The experiment was designed to produce a stimulated region of at least...