Swellable Packers Provide a Brownfield Water Management Solution in Open and Cased Hole - Case Histories Including Straddles, Plugs, Slimhole Sidetracks and Testing In Corroded Casing (Russian)

Douseri, Khaled Mohammed Al; Barnes, Christopher; Young, Dustin; Smith, Peter E.

doi:10.2118/124394-ru

Cited by 4 publications

(1 citation statement)

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“…Diapers are made of superabsorbent material that absorbs liquid but remains apparently dry. Swelling elastomers are used in oil and gas wells for zonal isolation, 10 –12 cementless completions, 13 well remediation, 14 and so on.…”

Section: Introductionmentioning

confidence: 99%

Diffusion-based swelling in elastomers under low- and high-salinity brine

Akhtar

Qamar

Mehdi

et al. 2018

Journal of Elastomers & Plastics

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Swelling elastomers are designed to swell when immersed into fluids like water, oil, or acid. The mechanism of swelling can be either diffusion or osmosis, initiating the imbibition of fluid inside the elastomer and progressively swelling it. Work presented here investigates diffusion as the swelling mechanism. Swelling experiments are conducted at two temperatures (room and 50 C) using water of different salinities (0.6% and 12%) as the swelling medium. Changes in volume, thickness, mass, and hardness are recorded. Measurements are taken before swelling and after 1, 2, 4, 7, 10, 16, 23, and 30 days of swelling. As expected, volume, thickness, and mass of the elastomer increase with increase in the number of swelling days, while hardness shows a decreasing trend. More variation is observed for all quantities in low-salinity brine as compared to high salinity, at both temperatures. However, density values are larger for high-salinity brine at both temperatures. Stokes-Einstein formula is used to determine the diffusion coefficients. Viscosity is measured using a Cannon-Fenske apparatus of size 50. Larger values of diffusion coefficient are found in low-salinity water at both temperatures, consistent with the higher amount of swelling and the faster swelling rate. These results and the diffusion-based approach will help in understanding the mechanics of swelling phenomenon. This work can aid in the development of new analytical and semi-analytical models that can predict seal pressure and other performance factors more accurately for applications in oil and gas wells.

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Section: Introductionmentioning

confidence: 99%

Diffusion-based swelling in elastomers under low- and high-salinity brine

Akhtar

Qamar

Mehdi

et al. 2018

Journal of Elastomers & Plastics

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Benefits and Application of a Surface-Controlled Sliding Sleeve for Fracturing Operations

Shaw

2011

All Days

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Recent improvements in fracturing technologies have allowed access to tight formations that previously were considered unprofitable. The most common of these technologies is a ball-drop-actuated sliding sleeve that allows operators to economically isolate and fracture ten to twenty zones in a single well. While these technologies have been well proven, there are still drawbacks such as: Each zone requires a drop in the production string ID The zones must be stimulated beginning at the toe and ending at the heel Many applications require milling-out of ball seats after fracturing When possible to move sleeves after fracing, a workover is required. A system has been developed to alleviate these limitations. This system includes well profile and isolation similar to the ball-drop sliding sleeve system but offers control of the sliding sleeves from the surface. This eliminates the cost and downtime of intervention. The system consists of an ICV (interval control valve) that has been optimized for fracturing applications. It is essentially an intelligent completion method that can withstand the extreme environment of a frac application. This allows the operator to frac the zones in any order, re-frac at a later date, close zones to allow pressure to build, eliminate water cut, and conduct transient pressure analysis of any zone without the necessity of a workover. This paper discusses the use of surface-controlled sliding sleeves in frac-pack operations and the benefits that an operator can realize by installing the new sliding sleeves in tight formations.

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The Bulkhead Principle – Delaying Water Cut and Improving Horizontal Well Productivity through Compartmentalization Using Short Swellable Packers

Smith

Young

Shahreyar

et al. 2011

SPE Asia Pacific Oil and Gas Conference and Exhibition

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Inflow control devices (ICDs) are used extensively to address the challenges of water management, particularly with the coning effects of water and gas inflow as well as permeability heterogeneity in horizontal wells. Historically, in Saudi Aramco wells, the horizontal open hole has been segmented in up to 6 compartments using mechanical openhole packers However, economic restraints and the risks have limited the running of a larger number of these packers. This paper discusses the development and results of a concept proposed to maximize the production potential from horizontal passive inflow control completions.In any well, there are uncertainties, both in the reservoir itself and in the operational events that work sequences can cause. A planned completion may not reach total depth (TD), or there may be undetected fractures or high permeability streaks in the reservoir section. A study has been undertaken to further enhance production and to maximize the benefit of inflow-control-device completions with the usage of slip-on swelling packers to increase the number of compartments in the open hole. It is assumed that shorter compartments will lead to an increase in net oil production, because water breakthrough can be managed more efficiently; i.e., the principle similar to that in a ship, where if there are no compartments and the ship leaks, it will fill with water and sink. If the ship uses bulkheads to form small discrete compartments and leaks, only the compartment with the hole is water filled. Likewise, if a well starts to produce water but is compartmentalized, only the section or sections with water will flood; the rest will continue to produce oil.In addition, we know through wireline logs, logging while drilling (LWD), or through the actual drilling results where we expect water or gas breakthrough to occur, but we are not able to predict with repeatable accuracy the nature of the fracture network in the matrix behind what we can see in the near wellbore environment. Then, it becomes beneficial to attempt to eliminate this uncertainty by increasing the number of compartments where the breakthroughs can occur.The short slip-on swellable packer, which was developed to provide a cost-effective annular isolation method, will be described in the paper along with the testing processes and field-trial validation that included nearbore simulation and modelling. The system has been proven as successful for sandstone and carbonate reservoirs. IntroductionThe development of horizontal wells has contributed greatly to increased productivity and is well documented. The industry drive to improve individual well output and overall field management has led to the adoption of many wellbore technologies such as multilaterals, maximum reservoir contact (MRC) wells, active inflow control completions, and openhole completions in both carbonate and sandstone reservoirs. Many of the earlier horizontal wells demonstrated challenges associated with the tendency for premature water breakthrough to shorten the productive life o...

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Swellable Packers Provide a Brownfield Water Management Solution in Open and Cased Hole - Case Histories Including Straddles, Plugs, Slimhole Sidetracks and Testing In Corroded Casing (Russian)

Cited by 4 publications

References 0 publications

Diffusion-based swelling in elastomers under low- and high-salinity brine

Diffusion-based swelling in elastomers under low- and high-salinity brine

Benefits and Application of a Surface-Controlled Sliding Sleeve for Fracturing Operations

The Bulkhead Principle – Delaying Water Cut and Improving Horizontal Well Productivity through Compartmentalization Using Short Swellable Packers

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