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A method for generating electric power, such as at, or close to, natural gas fields. The method includes conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas by means of a membrane separation step. This step creates a leaner, sweeter, drier gas, which is then used as combustion

A method for generating electric power, such as at, or close to, natural gas fields. The method includes conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas by means of a membrane separation step. This step creates a leaner, sweeter, drier gas, which is then used as combustion fuel to run a turbine, which is in turn used for power generation.

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[ I claim:] [1.] A method for generating electric power, comprising the steps of:(a) lowering the hydrocarbon dewpoint of a high-pressure gas stream comprising C.sub.3+ hydrocarbons and methane by removing C.sub.3+ hydrocarbons by selective permeation of the C.sub.3+ hydrocarbons through a membrane;

[ I claim:] [1.] A method for generating electric power, comprising the steps of:(a) lowering the hydrocarbon dewpoint of a high-pressure gas stream comprising C.sub.3+ hydrocarbons and methane by removing C.sub.3+ hydrocarbons by selective permeation of the C.sub.3+ hydrocarbons through a membrane;(b) using at least a portion of a resulting hydrocarbon-dewpoint-lowered membrane residue stream as combustion fuel in a turbine;(c) using the turbine to drive an electric power generator.