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STAR SHIELD Wellbore Shielding & Stabilizationfor North America
Proven Solutions forComplex ChallengesImpact Fluid Solutions is a premier provider of specialty additives for oil andgas drilling, cementing and completions. We combine advanced chemistry withextensive oilfield expertise to identify critical wellbore challenges and developpurpose-built solutions. Our best-in-class additives deliver advantagesunavailable from conventional fluids and are:uu roven in more than 3,000 wells throughout the U.S., Canada and over 45Pother countriesuu Trusted by leading operators, fluid companies and oilfield service providersuu Backed by technical support conventional chemical suppliers cannot provideIn particular, Impact is a recognized leader in the science of WellboreShielding and stabilization. Our STAR SHIELD Wellbore Shielding productsfor unconventional oil and gas plays have enabled trouble-free drilling in someof the most unstable, mechanically weak formations in North America.PROVEN SUCCESS ACROSSNORTH AMERICAEagle Ford Shale Woodford Shale –Anadarko & Arkoma Basins Permian Basin Bakken Shale Gulf of Mexico Canada Major North American Oil & Gas Basins
Preventing Wellbore StabilityProblems in North American BasinsOvercoming Difficult Conditions in Unconventional WellsFrom mechanically weak formations to depleted zones with high overbalancepressures, wellbore instability is a growing concern in North Americanresource plays. The low fracture gradients and narrow mud weight windowscommonly found in these environments can exacerbate stability issues.Conventional approaches to wellbore instability generally involve remediationafter problems occur. However, these reactive solutions ultimately translateto additional rig time and costs.Impact’s Wellbore Shielding additives represent a smarter strategy:prevention. Our flagship STAR SHIELD products—formulated specificallyfor North American shale plays—are proven to engineer ultra-low invasiondrilling fluids. These innovative additives preserve wellbore stability to enableoperators to reduce NPT, improve ROI and increase ultimate recoveries.STAR SHIELD SOLUTIONS STABILIZEWELLBORES IN CHALLENGING DRILLINGCONDITIONS INCLUDING:GravelUnconventional shale plays Microfractures High Perm SandDepleted formations Poorly consolidated sands Heavy oil (SAGD) Coal seams Deepwater applications High overbalance ( 5,000 psi) Fractured FormationWithout Impact’sWellbore ShieldingWith Impact’sWellbore ShieldingTypical Loss Zones - With and Without Wellbore Shielding Additivesin the Drilling Fluid
Shield Against Fluid& Pressure InvasionThe STAR SHIELD name comes from the advanced science behind oursolutions. Impact’s proprietary chemistry forms a flexible “shield” in the fluidsystem, producing an extremely low-permeability barrier on the face of thewellbore. This shielding barrier quickly seals and isolates a targeted range ofpores and microfractures at high differential pressure, protecting troublesomeformations. In contrast with conventional wellbore strengthening techniques,the seal remains stable under high-shear and high-temperature conditions.HOW WELLBORE SHIELDING WORKSFigure 1Initially, the STAR SHIELD Wellbore Shieldingparticles are free-floating in the fluid.Figure 2As differential pressure increases, theshielding particles migrate toward theformation, are absorbed, break apart andbegin to form a protective layer.Figure 3Finally, at maximum differential pressure, theshielding particles form a nearly impenetrablebarrier against fluid and pressure invasion.
Advanced Science.Measurable Advantages.STAR SHIELD additives form a tough, impermeable barrier at the fluid-rock interfacethat effectively blocks solids invasion, enabling operators to: trengthen & Stabilize the Wellbore – ShieldSmechanically weak and interbedded shales and preventfractures from propagating, minimizing formationbreakdown and preserving wellbore integrity.uu void Stuck Pipe Incidents – Reduce the potentialAfor differential sticking in depleted and high-porosityformations, and high overbalance conditions.uu Minimize Non-Productive Time – Inhibit sloughing,washouts, hole closure and other significantcontributors to NPT.uu liminate Intermediate Casing – Achieve significantEsavings on well construction costs by running twocasing strings instead of three.uu revent Fluid Loss & Formation Damage – ProtectPagainst fluid penetration into pores, fractures andbedding planes, and transmission of wellbore pressureto the geology.uu xpand the Mud Weight Window – Drill with mudEdensities greater than the fracture gradient withoutincurring losses, stuck pipe incidents, or logging orcasing issues.uu Reduce Total Well Costs – Add STAR SHIELD productsdirectly to the circulating system at comparativelylow concentrations, providing savings on dilution,transportation and storage while reducing waste.uuADDITIVE PERFORMANCE Eagle Ford ShaleExpanding the Mud Weight WindowWhile Saving 500,000In the Eagle Ford Shale, an operator drilling a well designed withthree casing strings encountered significant gas influx in thelateral. The operator increased the mud weight to 13.5 ppg in thetroublesome Wilcox interval.Problem: Lost circulation occurred while placing a mud cap,breaking down the Wilcox. The operator experienced substantialNPT and lost large volumes of oil-based mud to the formation.Solution: Using STAR SHIELD in the active system, the operatordrilled the Wilcox with a mud weight of 13.5 ppg. Below the Wilcox,the mud weight was increased to 14.5 ppg with full returns.RESULT: At the kickoff point around13,000’, the operator began a 6¾” slimhole design, drilling to a TMD of 19,000’. Zero wellbore stability issues orNPT due to insufficient mud weight Eliminating intermediate casingreduced well costs by 500,000
STAR SHIELD ProductsSolving a Range of Wellbore Stability ChallengesImpact recognizes that every drilling program is different, so we developed theSTAR SHIELD product line to seal several targeted ranges of fracture sizes. Allof these advanced additives are equally effective in water-, oil- and syntheticbased fluid systems. Our scientists and technical team will work with youto determine the ideal STAR SHIELD product to solve your wellbore stabilitychallenges while optimizing mud weight and solids in the fluid system.STAR SHIELD Seals induced andpre-existing fracturesranging up to 250 μm. STAR SHIELD 500An extension of STARSHIELD, seals induced andpre-existing fractures upto 500 μm with only slightmodifications to solidscontrol systems.ADDITIVE PERFORMANCE Woodford ShaleEliminating Mud Losses, NPT & Intermediate CasingAn operator was planning a multi-wellprogram in the Woodford Shale, whereexpensive instability issues and severemud losses are common when drilling thedepleted Red Fork formation.Problem: Keeping mud weights below thefracture gradient in the Red Fork sands canpose challenges for operators later in theSpringer/Woodford lateral section, wherehigher mud weights are required to preventsloughing shale.Solution: The operator pre-treated thedrilling fluid system with STAR SHIELD before switching to oil-based mud, and thenmaintained that formulation to TD.RESULT: Successfully drilled 20,619' of openhole to TD and lateral to 22,164' with nomud losses or NPT related to wellboreinstability Significant cost reduction by avoiding theneed for intermediate casingSTAR SHIELD 3000Seals fractures up to3,000 μm with relatively lowconcentrations compared toconventional LPMs and LCMs.
STAR SHIELD candidate wells are carefullyevaluated after rigorous technical review to ensurethe application is fit for purpose. Contact us to learnwhether our Wellbore Shielding chemistry can deliverAdditive Performance to your drilling program.impact-fluids.com 1 713 964 7736
Impact Fluid Solutions, LP2800 Post Oak Blvd., Suite 2000Houston, TX 77056Phone: 1 713 964 7736Technology CenterImpact Fluid Solutions (UK), Ltd.Ella Court, Truro Business ParkThreemilestoneCornwall, England, United Kingdom, TR49NHPhone: 44 1872 261613
to determine the ideal STAR SHIELD product to solve your wellbore stability challenges while optimizing mud weight and solids in the fluid system. STAR SHIELD STAR SHIELD 500 STAR SHIELD 3000 Seals induced and pre-existing fractures ranging up to 250 μm. An extension of STAR SHIELD, seals induced and pre-existing fractures up
