Method of preparation of variable permeability fill material for use in subterranean formations

A method of filling voids in a subterranean formation comprising the steps of:

• admixing an aqueous fluid with a viscosifying agent comprising a polysaccharide in an amount sufficient to viscosify said aqueous fluid;
• admixing a first particulate with said viscosified aqueous fluid, said first particulate having a particle size of no greater than about 10 mesh;
• admixing another particulate with said viscosified aqueous fluid, said another particulate having a particle size having a median diameter of less than about 1/7th the median diameter of said first particulate, said another particulate comprising from about 1 to about 30% by volume of the particulate present;
• admixing a resin composition and a hardener with said viscosified aqueous fluid in an amount sufficient to effect at least partial coating of the total particulate admixed with said viscosified fluid whereby at least a portion of the first particulate is coated by said resin composition and at least a portion of said another particulate is caused to adhere upon the surface of said first particulate;
• introducing said viscosified aqueous fluid containing said resin coated particulate into a subterranean formation containing voids whereby at least a portion of said voids are filled by said viscosified aqueous fluid to provide a fill material upon hardening of said resin composition having a substantially uniform permeability.

A method of filling voids in a subterranean formation comprising the steps of:

• admixing an aqueous fluid with a viscosifying agent comprising a polysaccharide in an amount sufficient to vscosify said aqueous fluid;
• admixing in the following sequence:
• (a) a first particulate with said viscosified aqueous fluid, said particulates having a particle size of no greater than about 10 mesh;
• (b) a reson composition with said viscosified aqueous fluid in an amount of from about 4 to about 20% by weight of the particulate;
• and
• (c) a second particulate with said viscosified aqueous fluid, said second particulate having a median diameter of less than about 1/7th the median diameter of said first particulate, said second particulate comprising from about 1 to about 30% by volume of the particulate present;
• coating said first particulate with said resin in said viscosified fluid prior to admixture of said second particulate whereby upon addition of said second particulate at least a portion of said second particulate is caused to cluster about and adhere to the individual particles of the first particulate;
• introducing said viscosified aqueous fluid containing said resin coated particulate into a subterranean formation containing voids whereby at least a portion of said voids are filled by said viscosified aqueous fluid containing said particulate;
• and
• compacting said particulate in said voids by application of pressure to said viscosified aqueous fluid to provide a fill material having a substantially uniform permeability upon hardening of the resin composition.

A method of filling voids in a subterranean formation comprising the steps of:

• admixing an aqueous fluid with a viscosifying agent comprising a polysaccharide in an amount sufficient to viscosify said aqueous fluid;
• admixing in the following sequence:
• (a) a resin composition with said viscosified aqueous fluid in an amount of from about 4 to about 20% by weight of the particulate;
• (b) a first particulate with said viscosified aqueous fluid, said particulate having a particle size of no greater than about 10 mesh;
• (c) a second particulate with said viscosified aqueous fluid, said second particulate having a median diameter of less than about 1/7th the median diameter of said first particulate, said second particulate comprising from about 1 to about 30% by volume of the particulate present,
• coating said first particulate with said resin in said viscosified fluid prior to admixture of said second particulate whereby upon asddition of said second particulate at least a portion of said second particulate is caused to cluster about and adhere to the individual particles of the first particulate;
• introducing said viscosified aqueous fluid containing said resin coated particulate into a subterranean formation containing voids whereby at least a portion of said voids are filled by said viscosified aqueous fluid containing said particulate;
• and
• compacting said particulate in said voids by application of pressure to said viscosified aqueous fluid to provide a fill material having a substantially uniform permeability upon hardening of the resin composition.

A method of filling voids in a subterranean formation comprising the steps of:

• admixing an aqueous fluid with a viscosifying agent comprising a polysaccharide in an amount sufficient to viscosify said aqueous fluid;
• admixing in the following sequence;
• (a) a first particulate with said viscosified aqueous fluid, said first particulate having a particle size of no greater than about 10 mesh;
• (b) a resin composition and a hardener with said visosified aqueous fluid in an amount sufficient to effect at least partial coating of the total particulate admixed with said viscosified fluid;
• and
• (c) another particulate with said viscosified aqueous fluid, said another particulate having a particle size having a median diameter of less than about 1/7th the median diameter of said first particulate said another particulate comprising from about 1 to about 30% by volume of the particulate present,
• whereby at least a portion of the first particulate is coated by said resin composition and at least a portion of said another particulate is caused to adhere upon the surface of said first particulate;
• introducing said viscosified aqueous fluid containing said resin coated particulate into a subterranean formation containing voids whereby at least a portion of said voids are filled by said viscosified aqueous fluid to provide a fill material upon hardening of said resin composition having a substantially uniform permeability.

A method of filling voids in a subterranean formation comprising the steps of:

• admixing an aqueous fluid with a visosifying agent comprising a polysaccharide in an amount sufficient to viscosify said aqueous fluid;
• admixing in the following sequence:
• (a) a resin composition and a harder with said viscosified aqueous fluid in an amount sufficient to effect at least partial coating of the total particulate to be admixed with said viscosified fluid;
• (b) a first particulate with said viscosified aqueous fluid, said first particulate having a particle size of not greater than about 10 mesh;
• and
• (c) another particulate with said vscosified aqueous fluid, said another particulate having a particle size having a median diameter of less than about 1/7th the median diameter of said first particulate said another particulate comprising from about 1 to about 30% by volume of the particulate present,
• whereby at least a portion of the first particulate is coated by said resin composition and at least a portion of said another particulate is caused to adhere upon the surface of said first particulate;
• introducing said viscosified aqueous fluid containing said resin coated particulate into a subterranean formation containing voids whereby at least a portion of said voids are filled by said viscosified aqueous fluid to provide a fill material upon hardening dening of said resin composition having a substantially uniform permeability.