METHODS AND COMPOSITIONS FOR USE IN OIL AND/OR GAS WELLS

摘要

Methods and compositions (e.g., comprising an emulsion or a microemulsion) for use in various aspects of the life cycle of an oil and/or gas well are provided. In some embodiments, an emulsion or the microemulsion comprises water, a solvent, and a surfactant, and optionally, one or more additives. In some embodiments, a concentrate is provided which may be used to form an emulsion or microemulsion.

主权项

1. A method of treating an oil and/or gas well having a wellbore, comprising:
injecting a fluid into the wellbore, wherein fluid comprises: a concentrate comprising:
a first type of surfactant, wherein the first type of surfactant is a nonionic surfactant;a second type of surfactant, wherein the second type of surfactant is selected from the group consisting of polyamines, polyimines, polyesters, and resins; anda first type of solvent comprising a terpene;wherein the ratio of the first type of surfactant and the second type of surfactant is between about 1:4 and about 4:1; and a dilution fluid comprising a second type of solvent and an acid.