• 专利标题:   Preparing crosslinked hydraulic fracturing fluid for hydraulic fracturing a subsurface formation, involves combining hydraulic fracturing fluid comprising polyacrylamide polymer, guar gum, and hydroxypropyl guar gum with coated proppants.
  • 专利号:   US2021403799-A1
  • 发明人:   LI W, ALSHARAEH E, BATAWEEL M A
  • 专利权人:   SAUDI ARABIAN OIL CO, UNIV ALFAISAL
  • 国际专利分类:   C09K008/68
  • 专利详细信息:   US2021403799-A1 30 Dec 2021 C09K-008/68 202227 English
  • 申请详细信息:   US2021403799-A1 US472867 13 Sep 2021
  • 优先权号:   US472867

▎ 摘  要

NOVELTY - Preparing a crosslinked hydraulic fracturing fluid involves combining a hydraulic fracturing fluid comprising a polyacrylamide polymer, guar gum, and/or hydroxypropyl guar gum with coated proppants, and allowing the zirconium oxide crosslinker within resin proppant coating (110) to crosslink the polyacrylamide polymer within the hydraulic fracturing fluid at a pH of at least 9, forming the crosslinked hydraulic fracturing fluid. where the coated proppants comprise a proppant particle (100) and a resin proppant coating on the proppant particle, the resin proppant coating comprising resin and a zirconium oxide crosslinker, the resin comprises at least one of phenol, furan, epoxy, urethane, phenol-formaldehyde, polyester, vinyl ester, and urea aldehyde. USE - Method for preparing a crosslinked hydraulic fracturing fluid used for increasing a rate of hydrocarbon production from a subsurface formation and hydraulic fracturing a subsurface formation (all claimed). ADVANTAGE - The method provides proppant coating increasing the surface area of the particle so that the crush stress is distributed over a larger area of the coated proppant particle, in turn, the distribution of force along a larger area should result in a decrease in the amount of crushed proppant particles, also known as the crush percentage, the proppant coating also adheres to the proppant and prevents proppants that are crushed upon application of formation stress from releasing proppant fines which may migrate into the formation and restrict flow conductivity of the formation, coated proppants have a greater density than conventional uncoated proppants. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a method for increasing a rate of hydrocarbon production from a subsurface formation which involves producing a first-rate of production of hydrocarbons from the subsurface formation through a wellbore, introducing the crosslinked hydraulic fracturing fluid into the subsurface formation, and increasing hydrocarbon production from the subsurface formation by producing a second rate of production of hydrocarbons from the subsurface formation, the second rate of production of hydrocarbons is greater than the first-rate of production of hydrocarbons; and (2) a method for hydraulic fracturing a subsurface formation which involves introducing the crosslinked hydraulic fracturing fluid into the subsurface formation, and allowing hydraulic fracturing with the crosslinked hydraulic fracturing fluid to occur in the subsurface formation to extract hydrocarbons from the subsurface formation. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a proppant particle and a coated proppant. Proppant particle (100) Resin proppant coating (110)