Abstract: A system includes a well extending through an underground formation, a primary tunnel extending a length outwardly from the well at a first axial location along the well, a battery installed in the primary tunnel, recharging equipment connected to the battery, and electrically powered downhole equipment positioned in the well, wherein the downhole equipment is connected to the battery.

Abstract: Provided is a composition that may include an alkylamine modified graphene having a formula R[—CH2-alkylamine)]x, where R is a graphene core, [—CH2-alkylamine)] is an alkylamine functional group, and x is a non-zero integer. The alkylamine functional group may include [—CH2-n-propylamine)], [—CH2-n-hexylamine)], or [—CH2-n-dodecylamine)]. Trace amounts of an oxygen and nitrogen functional group may be coupled to the graphene core. Further provided is a method that may include introducing alkylamine modified graphene into a hydrocarbon-contaminated water. The method may further include separating a hydrocarbon-absorbed alkylamine modified graphene from the recovered water. Further provided is a system that may include a holding tank, a pump, a membrane housing, and a collection tank. The membrane housing may include membranes and a filtration media.

Abstract: A process of treating nano-filtration membrane retentate comprises introducing seawater comprising a sulfate ion concentration of greater than or equal to 3000 mg/l to the NF membrane to produce a retentate stream and a permeate stream, wherein the retentate stream has a sulfate ion concentration greater than or equal to 10,000 mg/l, and mixing barium additives comprising barium chloride dehydrate (BaCl2.2H2O), barium chloride (BaCl2), or both with the retentate stream to precipitate sulfate from the retentate stream to form barite (BaSO4) and reduce the sulfate ion concentration, wherein the barium additives are added into the retentate stream at a barium ion concentration of greater than 10,000 mg/l.

Abstract: Provided is a composition that may include an alkylamine modified graphene having a formula R[—CH2-alkylamine)]x, where R is a graphene core, [—CH2-alkylamine)] is an alkylamine functional group, and x is a non-zero integer. The alkylamine functional group may include [—CH2-n-propylamine)], [—CH2-n-hexylamine)], or [—CH2-n-dodecylamine)]. Trace amounts of an oxygen and nitrogen functional group may be coupled to the graphene core. Further provided is a method that may include introducing alkylamine modified graphene into a hydrocarbon-contaminated water. The method may further include separating a hydrocarbon-absorbed alkylamine modified graphene from the recovered water. Further provided is a system that may include a holding tank, a pump, a membrane housing, and a collection tank. The membrane housing may include membranes and a filtration media.