Chemical compositions and in-situ methods of using same for remediating sulfur-containing compositions and other contaminants in fluids being extracted from the earth

A treatment method for remediating various contaminants including H2S, CO2, NH3 and other contaminants contained in fluids being extracted from the earth comprising the steps of:

• preparing an aqueous based treatment composition containing water and collectively 35-55 weight percent of one or more hydroxide compounds;
• injecting a dosage amount of the treatment composition into contaminated fluids located in a subterranean deposit under the earth's surface such that the treatment composition mixes with the fluids deep under the earth's surface;
• and extracting a mixture of the contaminated fluids and the treatment composition through a well such that the treatment compositions remediates contaminants in the fluids as the mixture passes through the well to the earth's surface, wherein a dosage amount of the treatment composition is 0.010 to 10.0 ml of the aqueous based treatment composition/liter of the contaminated fluids being extracted from the subterranean deposit, wherein the contaminated fluids located in the subterranean deposit under the earth's surface are at a temperature of at least 250° F.