An experimental study on fluid-loss behavior of fracturing fluids and formation damage in high-permeability porous media

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:166585

Parlar, M; Nelson, E B; Walton, I C ^[1]

---

1. and others

A recent trend in stimulating high-permeability formations is the development of techniques (such as frac-pack) to create short fractures which bypass formation damage in the near-wellbore region. Analysis and refinement of these techniques are hampered by a lack of knowledge of the leakoff behavior of candidate fluids in high-permeability rocks. In this paper, we present results from static-fluid-loss and formation-damage (reverse-flow) experiments using 12-inch-long cores in the permeability range of 3 to 1,000 md. A Hassler cell, with 6 pressure taps placed at 2-inch intervals, was used. The test fluids included borate-crosslinked-guar, linear-guar, linear-HEC, and viscoelastic-surfactant solutions. The effects of differential pressure, gel concentration, permeability, and temperature on spurt and leakoff coefficients were investigated, and correlations were given. In the absence of fluid-loss-control additives, the internal cake is the controlling factor for spurt and total leakoff for crosslinked fluids. Linear HEC behaves as a shear-thinning fluid during flow through porous media. A nonlinear, algebraic equation generalizing the well-known Williams expression for C{sub vc} to power-law fluids was derived as an approximate method of incorporating the leakoff behavior of power-law fluids into current fracturing simulators.

• OSTI ID: 166585
• Report Number(s): CONF-951002--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ENHANCED RECOVERY
FLUID FLOW
FRACTURING FLUIDS
HYDRAULIC FRACTURING
PERMEABILITY
PETROLEUM
POROUS MATERIALS
PRODUCTION
RESERVOIR ROCK