Spacers for fracture props

Patent · Tue Jul 20 04:00:00 EDT 1965

OSTI ID:6685408

Fast, C R

In this method of fracturing, the fracture props are spaced apart by soluble spacing particles so that, when the soluble props are dissolved, large flow channels remain between them. The material used as fracture props is prilled urea. This is in a form which does not break readily and, when it does break, tends to form large partially rounded particles with less tendency to bridge the holes between the unbroken prills and fracture props. Since urea is very water soluble, it should not be used in an aqueous fracturing fluid unless a coating of an oil-soluble material is applied. Ordinarily, the urea should be used as a spacer material in oil-base fracturing liquids. Since there is some tendency for the urea prills to stick together, particularly at to dust them with a finely divided powder such as bentonite, talc or the like. Props and urea prills may be premixed before they are added to a fracturing liquid. (8 claims)

• Assignee: TUL; EDB-81-025487
• Patent Number(s): US 3195635
• OSTI ID: 6685408
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
AMIDES
BENTONITE
CARBONIC ACID DERIVATIVES
COMMINUTION
FLUID INJECTION
FRACTURED RESERVOIRS
FRACTURING
GEOLOGIC DEPOSITS
HYDRAULIC FRACTURING
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERAL RESOURCES
MINERALS
NATURAL GAS DEPOSITS
NATURAL GAS FIELDS
NATURAL GAS WELLS
OIL FIELDS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PETROLEUM DEPOSITS
PROPPING AGENTS
RESOURCES
STIMULATION
UREA
WELL STIMULATION
WELLS