Low-Damage Fluid-Loss Control for Well Completions

Himes, R.E.; Dahl, Jeff; Foley, Keith

doi:10.2118/22355-ms

Cited by 27 publications

(2 citation statements)

References 3 publications

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“…This means that, as the linear fluid penetrates deeper into the formation, the shear rate decreases and the apparent viscosity increases. Permeability damage has been shown to increase with increasing penetration of viscous fluids, not only with HEC (Himes et al 1991). The retained permeability for a noncrosslinked HEC is typically in the 30 to 50% range (Hodge et al 1995).…”

Section: Traditional Polymer Gel Systemsmentioning

confidence: 99%

Controlling Losses When Recompleting Low-Pressure Reservoirs

et al. 2015

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The challenge in many permeable water sensitive subhydrostatic reservoirs is to avoid the loss of completion fluid when completing or working over wells. It is not unusual to lose up to 1,000 bbl of completion fluid, resulting in a 20% to 50% reduction in production.Several different approaches have been used to prevent these losses. The most common is viscous fluid-loss control pills with sized particulates, such as calcium carbonate, which often requires a further treatment to remove the solids. An alternative is a solids-free crosslinked viscous polymer pill, which must be spotted and kept in position across the reservoir prior to it crosslinking.To overcome the limitation of conventional fluid-loss control pills, a low-viscosity system was developed. The system is composed of a viscous disproportionate permeability modifier (VDPM) with sized synthetic polymer particles and fibers, which, with time and temperature, degrade into organic acids. The VDPM reduces the effective permeability to the water-based fluids, and the sized particles create an impermeable filter cake. When the particles degrade, the organic acid acts to break any remaining polymer. The system can either be bullheaded or spotted in the wellbore prior to perforating and effectively seals the formation for several days.The fluid-loss pill has been used successfully in more than 25 wells. The volume of fluid lost into the formation is often less than 1 bbl, and production is maintained after the workover. The technique has made it possible to selectively stimulate new intervals or recomplete wells with an average increase of more than 240 BOPD, whereas, historically, a decline in production was not uncommon.

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Section: Traditional Polymer Gel Systemsmentioning

confidence: 99%

Controlling Losses When Recompleting Low-Pressure Reservoirs

et al. 2015

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“…A variety of fluid-loss control pills have been used in the industry, such as foams, 42 oil-soluble resins, 43 fibers, 43 ,44 acid soluble particulates, 42 graded salt slurries, 45 high concentrated linear 46 and cross-linked 47 non-biopolymers 48 and biopolymers. 49 High concentrations of polymer systems are very effective in fluid-loss control as long as the temperature limit of the specific polymer is not exceeded.…”

Section: (Iv) Fluid-loss Controlmentioning

confidence: 99%

Application of a New Class of Surfactants in Stimulation Treatments

Nasr‐El‐Din

Samuel

2003

All Days

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TX 75083-3836 U.S.A., fax 01-972-952-9435. AbstractDifferent acid systems have been used to stimulate production and injection wells for more than a century. Several chemicals are added to the acid to enhance the efficiency of the acidizing treatments, including various types of surfactants.Surfactants play a key role in many well treatments because of their unique properties. Surfactants are used to reduce surface tension, change wettability, mobilize residual oil, and disperse corrosion inhibitors. They are also used as anti-sludge agents, emulsifiers in acid-oil emulsions, and demulsifiers. This wide spectrum of applications is due to the ability of surfactants to adsorb on various surfaces and associate in the bulk of solutions and form micellar structures. The properties of surfactants depend on the size of the head, tail length, and configuration of the tail, surface charges, ionic strength and temperature.Recent advances in surfactant technology have introduced a new class of surfactants with special characteristics useful in oilfield applications. This new class of surfactant has the ability to form viscoelastic systems, which can be used to increase viscosity of the treating fluids, without causing formation damage. These surfactants have been used in Saudi Arabian fields to enhance diversion during matrix acid stimulation, reduce leak-off during acid fracturing and to minimize losses (well control) during workover. The system proved successful to provide fracture extensions in acid fracturing applications of low temperature seawater injectors and high temperature gas wells. These surfactant systems are non-damaging and do not require sized solids to control losses, which eliminates the need for remedial acid treatments.

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Water-Control Management Technologies: A Review of Successful Chemical Technologies in the Last Two Decades

Jaripatke

Dalrymple

2010

SPE International Symposium and Exhibition on Formation Damage Control

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Completion technologies and programs have had significant improvements throughout the last two decades. But water-production problems associated with channeling, cross flow, and coning still prevail in many areas. In addition to undesirable effects of the water on the surface and subsurface equipment, the cost of handling the water in producing wells can seriously reduce the profitability of the well. Diagnosing the causes of water-control problems has long been a major hurdle to operational economics. In the past two decades, water-control technologies have also evolved and developed significantly. This paper is a review of those technologies. It covers the gamut of water-control-related problems that can arise during the life of a well. A decision-matrix chart depicting types of water-control problems with the appropriate water-control technology is given. Case-history references for each solution category are also presented. The paper classifies different types of water-production problems keyed by their onset mechanisms. It also presents a review of the methods and limitations of the current water-control processes. A special emphasis is placed on the description of solutions to the water-control problems that are linked to hydraulic-fracture stimulation of reservoirs. The paper discusses the water-control management issues in the following categories: (1) prediagnostic evaluation, (2) problem identification, (3) diagnostic evaluation, (4) treatment-design considerations, (5) chemical water-control technologies, and (6) case-history references for each problem-solution category. Information presented in this paper will provide a completion engineer a good understanding of the range of water-control issues and give a methodical approach to selecting appropriate and optimum solutions that have evolved in the last two decades.

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Low-Damage Fluid-Loss Control for Well Completions

Cited by 27 publications

References 3 publications

Controlling Losses When Recompleting Low-Pressure Reservoirs

Controlling Losses When Recompleting Low-Pressure Reservoirs

Application of a New Class of Surfactants in Stimulation Treatments

Water-Control Management Technologies: A Review of Successful Chemical Technologies in the Last Two Decades

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