This data-file reviews 10 technical papers, in order to estimate the energy costs of manufacturing 1kW of wind turbines (in MWH/kW), the payback time to recoup that energy (in years) and the ultimate energy return on energy invested (EROEI).
The average CO2 intensity of wind turbines is suggested at around 13g/kWh, based on papers that disclosed this number.
Although one observation from reviewing the papers is that their methodologies are rough and may have under-estimated total energy intensities, especially around waste materials.
Comparable data for solar assets is linked here.