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Well treatment

  • US 5,964,291 A
  • Filed: 02/28/1996
  • Issued: 10/12/1999
  • Est. Priority Date: 02/28/1995
  • Status: Expired due to Term
First Claim
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1. A method of treating a well extending through a subterranean formation so as to supply a chemical treatment agent, the method comprising subjecting the well to a fracturing treatment with a high pressure fluid and proppant particles so fractures are formed in the formation and the proppant particles are carried into the fractures, wherein at least some of the proppant particles comprise rounded beads of a porous, insoluble, inorganic material of porosity no more than 30% containing a water-soluble chemical treatment agent precipitated from an aqueous solution in a form such that the chemical treatment agent then gradually leaches out into the well fluids over a prolonged period.

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