Fracture fluid alteration to mitigate barite scale precipitation in unconventional oil/gas shale systems

Patent · Tue Nov 30 00:00:00 EST 2021

OSTI ID:1860119

Jew, Adam

An acid spearhead formulation for mineral scale reduction that includes a sulfuric acid solution having an acidity that is substantially equivalent to a hydrochloric acid solution in an acid spearhead formulation, a sodium citrate compound, where an acid spearhead formulation for mineral scale reduction is formed, the acid spearhead formulation is disposed in a well bore to stabilize mineral scales, the acid spearhead formulation is disposed in the well bore to chelate solubilized calcium in a rock bed of the well bore, and the well bore includes a temporal thermodynamic subsurface barite cycling having a subsurface barite dissolution temporal phase, a subsurface barite transport to fractures temporal phase, a subsurface barite precipitation to fracture temporal phase and a subsurface barite dissolution to fracture space temporal phase, where the acid spearhead formulation for mineral scale reduction reacts with the well bore within the subsurface barite dissolution temporal phase.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• Assignee: The Board of Trustees of the Leland Stanford Junior University (Stanford, CA)
• Patent Number(s): 11,187,051
• Application Number: 16/519,823
• OSTI ID: 1860119
• Resource Relation: Patent File Date: 07/23/2019
• Country of Publication: United States
• Language: English