Plug-displaced sandpacking process |
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| 申请号 | US32470273 | 申请日 | 1973-01-18 | 公开(公告)号 | US3826310A | 公开(公告)日 | 1974-07-30 |
| 申请人 | SHELL OIL CO; | 发明人 | KARNES G; | ||||
| 摘要 | A slurry of resin, sand and oil, for forming a sand or gravel pack in a well, is injected ahead of a mass of solid particles that form chemically removable plugs across the openings of well casing perforations into which the slurry is injected. | ||||||
| 权利要求 | 2. The process of claim 1 in which said plug-forming solid particles are particles of benzoic acid. 3. The process of claim 2 in which said well casing perforations have diameters of about 3/8 -inch and said plug-forming particles have effective sizes ranging from about 0.05 to 0.5-inch. 4. The process of claim 3 in which the amount of said plug-forming particles is sufficient to form a contiguous mass of particles substantially filling the perforated portion of the well casing. 5. The process of claim 1 in which said self-curing resin and carrier liquid comprise a combination of a polar-solvent-containing epoxy resin and a carrier liquid that is partially but incompletely miscible with the polar-solvent contained in the resin. 6. The process of claim 5 in which the concentration of packing grains in the slurry of packing grains is sufficient to form a contiguous mass of grain that occupies from about 45-65 percent of the volume occupied by the slurry. 7. The process of claim 1 in which at least one portion of a slurry of packing grains, self-curing resin, and carrier liquid contains substantially gravel-sized packing grains that are adapted to form a relatively highly permeable consolidated mass and that portion of the slurry is injected immediately behind a portion of such a slurry that contains smaller sized packing grains. 8. In a well treating process in which an earth formation treating fluid is displaced through the perforations in a perforated section of well casing to contact and effect a treatment in the adjacent earth formations, the improvement which comprises: displacing the earth formation treating fluid into the perforated section of casing ahead of a fluid-transported mass of solid particles that have a size and composition adapting them to form chemically-removable plugs across the openings of the perforations through which the treating fluid is displaced; displacing substantially all of the earth formation treating fluid out of the perforated section of well casing through the perforations therein and forming chemically-soluble plugs cross the openings of said well casing perforations while each of those perforations are substantially completely filled with a continuous body of the treating fluid; and after allowing time for the earth formation treating fluid to effect a treatment of the earth formations, chemically removing the chemically-removable plugs. 9. The process of claim 8 in which the earth formation treating liquid is a resin formulation from which a self-curing sand consolidating resin is precipitated. |
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