Abstract Well bores employed for production of hydrocarbons having open hole completion and zonal breakdown in the locus of the well bore are recompleted, advantageously for injection of a fluid such as CO 2 in an enhanced oil recovery process. Recompletion is effected by packing off the open hole interval, emplacing a particulate material in the packed off interval and broken down zone, adhering the particulates together with an adhesive to form a permeable synthetic rock-like material, reaming out the open hole interval to a greater diameter than the original completion, setting a casing over the open hole interval, cementing between the casing and the reamed out hole, and perforating at the zones to be isolated and to be communicated with from the well bore, e.g., for CO 2 injection.
A process for recompleting a well bore having an open hole interval and having zonal breakdown in the locus of the well bore and the open hole interval to reconstitute isolation of a permeable zone from other permeable zones in a subterranean formation comprising: (a) packing off the open hole interval including the permeable zone to be isolated, (b) emplacing a particulate material in the packed off interval and the broken down zone, (c) adhering the particulates of the particulate material together with an adhesive to consolidate the particulates and to form a permable synthetic rock-like solid material, (d) removing material from along the open hole interval by reaming out to a greater diameter than the original completion so as to leave permeable synthetic rock-like solid material in the broken down zone but not horizontally adjacent to a non-permeable isolation zone which is situated vertically adjacent to the permeable zone to be isolated and which hroizontally abuts the reamed out hole, (e) setting a smaller diameter casing over the open hole interval, (f) cementing between the smaller diameter casing and the reamed out hole of (d), and (g) perforating to the permeable zone to be isolated to effect fluid communication between the well and the permeable zone to be isolated.
Claim 2
Dependent Claim
210 words
A process for recompleting a well bore having an open hole interval and having zonal breakdown in the locus of the well bore and the open hole interval to reconstitute isolation of a permeable zone from other permeable zones in a subterranean formation comprising: (a) packing off the open hole interval including the permeable zone to be isolated, (b) emplacing a particulate material in the packed off interval and the broken down zone, (c) adhering the particulates of the particulate material together with an adhesive to consolidate the particulates and to form a permable synthetic rock-like solid material, (d) removing material from along the open hole interval by reaming out to a greater diameter than the original completion so as to leave permeable synthetic rock-like solid material in the broken down zone but not horizontally adjacent to a non-permeable isolation zone which is situated vertically adjacent to the permeable zone to be isolated and which hroizontally abuts the reamed out hole, (e) setting a smaller diameter casing over the open hole interval, (f) cementing between the smaller diameter casing and the reamed out hole of (d), and (g) perforating to the permeable zone to be isolated to effect fluid communication between the well and the permeable zone to be isolated.
Claim 3
Dependent Claim
57 words
The process of claim 1 wherein a production well (having open hole completion and having zonal breakdown in the open hole completion formed by detonation of high explosives in the well bore) is recompleted as an injection well for injection of CO 2 into the isolated permeable zone of the formation in an enhanced oil recovery process.
Claim 4
Dependent Claim
25 words
The process of claim 2 wherein the particulate material is sand and/or gravel and wherein the adhesive is comprised of a high strength thermosetting resin.
Claim 5
Dependent Claim
58 words
The process of claim 3 wherein sand or gravel particles coated with a partially cured thermosetting resin are slurried into the packed off interval and the broken down zone and allowed to cure by means of heat from the formation in the packed off interval and broken down zone to form the permeable synthetic rock-like solid material therein.
Claim 6
Dependent Claim
30 words
The process of claim 4 wherein the synthetic rock-like solid material is formed from sand and/or gravel coated with a partially cured epoxy resin or a partially cured phenolic resin.