Cleaner frac fluids improve load recovery and tight-gas well production

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · World Oil; (United States)

OSTI ID:5786215

Hunter, J ^[1]; Walker, Jr, R N ^[2]

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1. Pennzoil, Houston, TX (US)
2. Halliburton Services, Kilgore, TX (US)

Possible damage to induced fracture flow capacity can result from leftover polymer filter cake. Injecting less polymer into the fracture helps to limit potential flow impairment and the resulting higher post-frac conductivity means faster cleanup, higher load water recovery and increased early production. Research efforts to identify the best crosslinked polysaccharide, high-temperature fracturing gel have resulted in systematic identification and selection of optimal system components and the introduction of new systems. An anionic guar derivative crosslinked with high performance zirconium metal, delayed crosslinker was found to provide high downhole viscosity using lower quantities of polymer gelling agent. The low-residue, delayed-crosslink fracturing (LRDCF) fluid system is a carboxymethylhydroxypropyl guar (CMHPG) polymer crosslinked with zirconium (IV) crosslinker and it provides greater downhole viscosities at lower gel loading than common hydroxypropyl guar (HPG). Reduced cost is another advantage of this system. Typical Cotton Valley frac jobs using it require 20% to 30% less polymer, fewer chemicals and identical jobs can cost 8% to 12% less than comparable HPG jobs. This paper summarizes 24 jobs performed on Cotton Valley wells using thiusing this system.

• OSTI ID: 5786215
• Journal Information: World Oil; (United States), Journal Name: World Oil; (United States) Vol. 212:10; ISSN 0043-8790; ISSN WOOIA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
023000 -- Petroleum-- Properties & Composition
CHEMICAL COMPOSITION
COLLOIDS
COST
DISPERSIONS
DRILLING
ELEMENTS
ENHANCED RECOVERY
FLUID INJECTION
FLUID INJECTION PROCESSES
FLUIDS
FORMATION DAMAGE
FRACTURING FLUIDS
GELS
INJECTION WELLS
METALS
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
OPTIMIZATION
POLYMERS
RECOVERY
RESERVOIR ROCK
TRANSITION ELEMENTS
VISCOSITY
WELL DRILLING
WELLS
ZIRCONIUM