Method for fracking of simulation of hydrocarbon bearing formation
Methods for the fracking or stimulation of a hydrocarbon-bearing formation are provided in multiple embodiments. According to one method, it comprises the steps of: providing a wellbore having a casing; inserting a plug in the wellbore at a predetermined location; inserting a perforating tool and an acidic composition into the wellbore; wherein the acidic composition includes a corrosion inhibiting composition comprising at least two compounds selected from: Group A-I, and wherein at least two compounds are selected from different groups of the Groups A-I.
1. A method for the fracking or stimulation of a hydrocarbon bearing formation, said method comprising:
providing a wellbore having a casing;
inserting a plug in the wellbore at a predetermined location;
inserting a wireline, a perforating tool, a spacer, and an acidic composition into the wellbore, wherein said acidic composition includes a corrosion inhibiting composition comprising a terpene, an amphoteric surfactant, and a solvent, wherein said acidic composition is in direct contact with said wireline and casing but separated from said perforating tool by said spacer;
wherein said acidic composition further includes a corrosion inhibiting composition comprising at least two compounds selected from: Group A; Group B; where the at least two compounds are selected from different groups and where:
Group A comprises compounds including: α, β-unsaturated aldehyde; formaldehyde; cinnamaldehyde;
Group B comprises compounds including: acetylenic compound; unsaturated alcohol; acetylenic alcohol; alkoxylated acetylenic alcohol; alkoxy phenols; diacetylenic alcohols;
positioning the perforating tool within the acidic composition near said predetermined location;
perforating the wellbore with the perforating tool thereby creating a perforated area and acid soluble debris;
placing the acidic composition in contact with the perforated area and acid soluble debris for a predetermined period of time to prepare the hydrocarbon bearing formation for stimulation;
removing the perforating tool from the wellbore; and
initiating the fracking or stimulation of the perforated area using a stimulation fluid.
2. The method according to claim 1 where the acidic composition further includes at least one of: mineral acids; organic acids; modified acids; synthetic acids; and combinations thereof.
3. The method according to claim 1 where the acidic composition further includes at least one of: HCl; methanesulfonic acid; sulfamic acid; toluenesulfonic acid; HCl-alkanolamine; HCl-amino acid, including lysine.
4. The method according to claim 1 where the Group A compound is selected from the group consisting of:
α,β-unsaturated aldehyde selected from the group consisting of:
cinnamaldehyde, t-cinnamaldehyde, crotonaldehyde, acrolein, methacrolein, leafaldehyde, citral, furfural, 3-methyl-2-butenal, 2-hexenal, 2-heptenal, 2-octenal, 2-nonenal, 2-decenal, 2-undecenal, 2-dodecenal, 2,4-hexadienal, 2,4-heptadienal, 2,4-octadienal, 2,4-nonadienal, 2,4-decadienal, 2,4-undecadienal, 2,4-dodecadienal, 2,6-dodecadienal, 1-formyl-[2-(2-methylvinyl)]-2-n-octylethylene, dicinnamaldehyde, p-hydroxycinnamaldehyde, p-methylcinnamaldehyde, p-ethylcinnamaldehyde, p-methoxycinnamaldehyde, p-dimethylaminocinnamaldehyde, p-diethylaminocinnamaldehyde, p-nitrocinnamaldehyde, o-nitrocinnamaldehyde, o-allyloxycinnamaldehyde, 4-(3-propenal) cinnamaldehyde, p-sodium sulfocinnamaldehyde, p-trimethylammoniumcinnamaldehyde sulfate, p-trimethylammoniumcinnamaldehyde o-methylsulfate, p-thiocyanocinnamaldehyde, p-(S-acetyl)thiocinnamaldehyde, p-(S—N,N-dimethylcarbamoylthio) cinnamaldehyde, p-chlorocinnamaldehyde, 5-phenyl-2,4-pentadienal, 5-(p-methoxyphenyl)-2,4-pentadienal, 2,3-diphenylacrolein, 3,3-diphenylacrolein, α-methylcinnamaldehyde, β-methylcinnamaldehyde, α-chlorocinnamaldehyde, α-bromocinnamaldehyde, α-butylcinnamaldehyde, α-amylcinnamaldehyde, α-hexylcinnamaldehyde, 2-(p-methylbenzylidene) decanal, α-bromo-p-cyanocinnamaldehyde, α-ethyl-p-methylcinnamaldehyde, p-methyl-α-pentylcinnamaldehyde, 3,4-dimethoxy-α-methylcinnamaldehyde, α-[(4-methylphenyl)methylene]benzeneacetaldehyde, α-(hydroxymethylene)-4-methylbenzylacetaldehyde, 4-chloro-α-(hydroxymethylene)benzeneacetaldehyde, α-nonylidenebenzeneacetaldehyde, derivatives thereof, and combinations thereof.
5. The method according to claim 1 where the Group B compound is selected from the group consisting of: propargyl alcohol, propoxylated propargyl alcohol, 2-hydroxyethyl propargyl ether, or a mixture thereof.
6. The method according to claim 1 where the Group B compound is selected from the group consisting of: methyl butynol, methyl pentynol, hexynol, ethyl octynol, propargyl alcohol, benzylbutynol, ethynylcyclohexanol, ethoxy acetylenics, propoxy acetylenics, and mixtures thereof; Preferred alcohols are hexynol, propargyl alcohol, methyl butynol, ethyl octynol, propargyl alcohol ethoxylate; propargyl alcohol propoxylate; and mixtures thereof.
7. The method according to claim 1 where the Group B compound is present in an amount from ranging from 0.01% to 10% by weight of the acid composition.
8. The method according to claim 1 where the Group B compound is present in an amount from 0.1% to 1.5% by weight of the acid composition.