Methods for Stimulating a Hydrocarbon-bearing Formation by Perforating a Wellbore and Introducing an Acidic Composition in the Wellbore

A method for the stimulation of a hydrocarbon-bearing formation, said method comprising:

• providing a wellbore;
• assessing a location for perforation of said wellbore;
• inserting a wireline and a bottom hole assembly comprising a plug and a perforation tool into said wellbore;
• wherein said bottom hole assembly is connected to a wireline;
• injecting an acidic composition into the wellbore;
• wherein said acidic composition is in direct contact with said bottom hole assembly, said wireline said and casing;
• positioning and setting said plug in the wellbore beyond said location;
• positioning the perforation tool at said location;
• perforating the wellbore with the perforation tool thereby creating a perforated area;
• allowing the acidic composition to come into contact with the perforated area for a predetermined period of time to prepare the formation for fracking or stimulation;
• removing the perforation tool from the wellbore;
• pumping a fluid to displace the acidic composition;
• and
• wherein the acid composition comprises a corrosion inhibitor package comprising at least two compounds selected from:
• Group A;
• Group B;
• Group C;
• Group D;
• Group E;
• Group F;
• Group G;
• Group H;
• and Group I, where the at least two compounds are selected from different groups and where:
• Group A comprises compounds encompassed within the following general chemical description:
• α,β-unsaturated aldehyde;
• Formaldehyde;
• Cinnamaldehyde;
• Group B comprises compounds encompassed within the following general chemical description:
• acetylenic compound;
• unsaturated alcohol;
• acetylinic alcohol;
• alkoxylated acetylenic alcohol;
• alkoxy phenols;
• diacetylenic alcohols;
• Group C comprises compounds encompassed within the following general chemical description:
• a group 15 metal including bismuth, antimony;
• antimony compounds;
• germanium compounds;
• Group D comprises compounds encompassed within the following general chemical description:
• sulfur-containing compounds;
• mercapto-compounds;
• organosulfur compounds
• reaction products of thiourea;
• thiodiglycol alkoxylates;
• Group E comprises compounds encompassed within the following general chemical description:
• nitrogen-containing surfactant;
• and
• non-ionic surfactant;
• Group F comprises compounds encompassed within the following general chemical description:
• morpholine;
• aminoalkyl imidazolines;
• sarcosine;
• two linked cyclic molecules with at least one nitrogen heterocycle including quinoline+benzy);
• imidazoline;
• and
• alkyl pyridine;
• Group G comprises compounds encompassed within the following general chemical description:
• aromatic ketone;
• amide;
• and
• phenyl ketone;
• Group H comprises compounds encompassed within the following general chemical description:
• an aromatic solvent;
• and
• Group I comprises compounds encompassed within the following general chemical description:
• carboxylic acid-containing compounds;
• and
• nitro-aromatic compounds with at least 1 carboxylic acid group.