DESCRIPTION

ForceGel XVE liquid biopolymer is a high-purity, cross-linked, Xanthan suspended in a freeze-resistant mineral oil and multiple surfactants, for ease of mixing and fast yield. XVE is not subject to particle settling or fluid separation under normal storage or transport conditions due to our proprietary suspension technology. XVE remains pourable and pump-able with long-term stability allowing for consistent, reliable, repeatable results at field locations any place in the world. ForceGel XVE's chemical structure allows for a significant increase in solution viscosity especially at low shear rates. XVE is readily soluble in hot and cold water and brines over a wide pH range. In aqueous solutions, XVE is extremely pseudo plastic and shows stability in a wide range of temperatures and pH changes. XVE has been formulated to provide unique resistance to thermal degradation at temperatures up to and over 300°F.

The product can be degraded by enzymatic and oxidizing agents; these properties are ideal for drilling, completions, and use in hydraulic fracturing. XVE was cross-linked using a proprietary ionic process yielding an eco-safe, biodegradable, compound with enhanced pseudo plastic properties required to move large amounts of solids. It's unique 'scaffolding' molecular structure makes the product an excellent suspending agent to carry cuttings from drilling and completion operations. XVE's rheological properties are particularly well suited to oilfield applications in that it's pseudo plasticity produces high viscosity while at rest.

RHEOLOGICAL INFORMATION

ForceGel XVE tested in 2% KCL Solution, Brookfield Viscometer,40° C

Use Rate Per 10
Barrels
60 RPM, Spindle No. 3
Centipoise Gravity
6 RPM, Spindle No.
3, Centipoise Gravity
Marsh Funnel, Seconds
2.5 gallons (0.595%)460 cP2560 cP86

ADVANTAGES

  • Easy to handle and mixes well in low shear environments
  • Extremely stable suspension provides reliable properties
  • Freeze/thaw cycle does not affect stability or performance of the product
  • Optimized bit hydraulics resulting in higher penetration rates (increased ROP)
  • Viscous laminar flow in the annulus for improved wellbore stability with maximum hole-cleaning and suspension capacity; minimal drilled solids settle under static conditions
  • Performs well in freshwater, seawater, and a variety of brines; both mono and divalent salts
  • and saturated salt environments
  • Excellent viscosifier - requires less material than other types of rheology modifiers
  • Solution viscosity is stable in varied temperature and pH conditions
  • Stable thickener for 15% HCl at temperatures below 200°F; utilized in wellbore stimulation
  • allowing for dissolved/displaced solids removal
  • Rapid dispersion without "fisheyes"
  • Excellent friction reduction in coil tubing applications
  • Demonstrates beneficial synergistic effect with polyacrylic polymers utilized for friction
  • reduction and shale stabilization

APPLICATION

ForceGel XVE mixes easily with oilfield waters. Add 1.0 to 1.5 quarts/barrel of fluids matrix depending on the application and viscosity required. Allow more time for complete hydration in cold fluid temperature or high salt content (monovalent - KCl/NaCl and divalent - CaCl2/CaBr2) waters.

ForceGel XVE has unique a unique 'scaffolding' molecular structure which allows other polyacrylic polymers to be mixed with the system to enhance carrying capacities, increase friction reduction, drag reduction, or prevent fluid loss. Force Chem's FR Series, SlickForce 1100, 1101, and 1103 have been developed to be used alone or in combination with ForceGel XVE's positive system benefits. Combining the technologies can reduce use of both compounds while maintaining the highest possible performance available in the industry.

GENERAL GUIDELINES FOR MAXIMUM PERFORM

ForceGel XVE can be used with or without bentonite, i.e. as a secondary or primary viscosifier/suspending agent. Unlike other polymers (cellulosics, polyacrylamides, starches), cross-linked XVE develops significant viscosity at low shear rates (LSRV) to provide suspension of weight materials in high-density fluids. XVE can be used in a wide range of makeup waters, ranging from fresh water to saturated sodium chloride, in formate brines, and near-saturated calcium chloride.

The following are some general guidelines to achieve optimum fluid efficiency in the field:

  1. As with any polymer-based system, the use of efficient solids control equipment is recommended, including high speed, fine screen shale shakers, hydroclones, and decanting centrifuges. Overall stability is based on maintaining low-density solids in the ≤5% by volume range, and using the biopolymers to increase LSRV.
  2. Bingham Plastic parameters, the plastic viscosity (PV), yield point (YP) will often be inverted, preferably varying between a PV:YP ratio of 1:2 to 1:3 with a PV in the 10-20 range for unweighted systems. Using XVE to improve carrying capacity will automatically maintain a low PV while increasing viscosity at low shear rates (≤5.1 sec-1), as measured with the Fann 35 and Brookfield viscometers.
  3. Using the Power Law model, "n" values, as calculated between 3 and 300 rpm, should be maintained between 0.25 and 0.35 for optimum shear thinning characteristics and hydraulic efficiency. "K" values >10 dynesn 2sec /cm are recommended to assure sufficient LSRV for suspension. Hole conditions should dictate the need for increasing "K". Fill on trips, settling, barite sag, and trouble making connections are all symptomatic of hole cleaning problems brought about by inadequate LSRV, and indicate the need to add XVE biopolymer.
  4. For optimum stability, pH of xanthan systems should be maintained between 8.0 and 9.0. Monitor and treat the high pH (above 10.0). Watch systems with soluble calcium such as in drilling cement solids due to rapid pH increases and the potential for reduction in performance. Pre-treat with Tetrasodium Pyrophosphate to minimize the effect.
  5. In low pH, fresh water and low salinity brines (<10% salt) a biocide/biostat (Glutaraldehyde) is highly recommended if the fluid is to be stored.
  6. Various additives, including glycols, polymeric blends, resins, and salts have been developed for shale inhibition. Most are compatible with XVE and other Force Chem FR polymers, pilot testing is highly recommended if cationic inhibitors are used (Halliburton Clay Stay & other similar technologies). For optimum stability, XVE should be pre-hydrated in the makeup fluid prior to adding cationic shale inhibitors.

HEALTH AND SAFETY

Before handling, storage or use, please refer to the Safety Data Sheet (SDS) for details
Force Chem's 24 Hour Emergency No.: ChemTel: (800) 255-3924 (Outside US/Canada: +1 (813) 248-0585)
Force Chem's Customer Service No.: (337) 334-8100 or (888) OIL-CHEM (645-2436), 24/7 - 365

SHIPPING

Standard packaging includes:

  • Non-returnable 330 gal. semi-bulk containers
  • Poly 55 gal. non-returnable drum
  • Poly Pails (32 Minimum/Pallet Load)
  • Lab samples of ForceGel XVE are available upon request.

Confidential: The information contained herein is based on data considered accurate with representative samples. However, no warranty is expressed or implied regarding the accuracy of this data or the results to be obtained from the use thereof. The above data does not imply specifications for this product. Force Chem Technologies assumes no responsibility for personal injury or property damage to vendees, users or third parties, caused by the material. Such vendees or users assume all risks associated with the use of the material. Consult the Material Safety Data Sheet before using this product.

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