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Hydraulic fracturing method employing special sand control technique

  • US 4,549,608 A
  • Filed: 07/12/1984
  • Issued: 10/29/1985
  • Est. Priority Date: 07/12/1984
  • Status: Expired due to Fees
First Claim
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1. A sand control method for use in a borehole having an unconsolidated or loosely consolidated oil or gas reservoir which is otherwise likely to introduce substantial amounts of sand into the borehole, comprising:

  • (a) providing a borehole casing through said unconsolidated or loosely consolidated oil or gas reservoir,(b) perforating said casing at preselected intervals therealong to form at least one set of longitudinal, in-line perforations,(c) hydraulically fracturing said reservoir by injecting a fracturing fluid containing a fine grain sand and a clay stabilizing agent through said perforations at a volume and rate to allow said stabilizing agent to penetrate the fracture face along its entire length at a depth sufficient to overcome the effects of fluid velocity increases in oil or gas production flow on the movement of clay particles or fines located near the fracture face into the fracture as such production flow linearly approaches said fracture face,(d) injecting a proppant comprising a gravel packing sand into said fracture so that said gravel packing sand pushes said fine grain sand up against the face of the fractured reservoir, whereby a first layer of fine grain sand is held in place along the entire face of said fracture by a second layer of gravel packing sand also extending along the entire length of said fracture to prevent the migration of clay particles or fines from said reservoir into said fracture, and(e) producing oil or gas from said reservoir through said fracture into said borehole casing.

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