Designing, planning nitrogen jobs. Part 2. Effect on stimulation fluid density, and volume

Journal Article · Mon Mar 05 04:00:00 EST 1979 · Oil Gas J.; (United States)

OSTI ID:5905073

Gras, E H; Ott, W K

Nitrogen can be an effective aid in acidizing and fracturing by increasing the treatment volume and/or controlling the stimulation fluid density. Hydraulic jetting with nitrogen can improve penetration rates. A new technique is shown for using nitrogen in these servicing applications. In both acidizing and fracturing, nitrogen commingled in the stimulation fluid increases the treatment volume. This extends radial penetration during matrix acidizing and lengthens the fracture when either fracture acidizing or fracturing to place propant. Greater penetration into the formation also is enhanced by a physical mechanism of the nitrogen bubbles in the treating fluid. By blocking pore spaces temporarily, nitrogen reduces fluid loss so the stimulation fluid becomes more efficient. Nitrogen also can be used to reduce the density of the stimulation fluid when performing density-controlled acidizing or fracturing jobs. Since the fracture may extend below the productive zone, commingled nitrogen in the appropriate liquid phase can effectively lighten the fluid to help obtain placement in the upper portion of the fracture, the productive zone. Use of nitrogen for density control is usually more convenient and economical than preparing solutions with salt or weighting materials.

• OSTI ID: 5905073
• Journal Information: Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 77:10; ISSN OIGJA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
ADDITIVES
CHEMICAL COMPOSITION
COMMINUTION
CONTROL
DENSITY
ELEMENTS
FLUIDS
FRACTURING
FRACTURING FLUIDS
HYDRAULIC FRACTURING
MIXING
NITROGEN
NONMETALS
OIL WELLS
PHYSICAL PROPERTIES
PROCESS CONTROL
STIMULATION
TECHNOLOGY ASSESSMENT
VOLUME
WELL STIMULATION
WELLS