Abstract:The proved reserve and production of low-permeability reserves in CNOOC account for a small part in CNOOC’s total preserved reserve and production at present. But it is becoming more and more important to keep the stable production of 500,000,000 ton each year. The main exploited low-permeability reserves in offshore are the reserves with permeability from 10mL to 50 mL. If the permeability is between 5 mL to 10 mL, it is necessary to choose the continuous reserves with relative simple structures to exploit. It is not recommended to exploit the complex blocks with lower permeability less than 5 mL according to present economic and technique. The integrated application of fracturing and water injection is vital to the development of the low-permeability reserves, the horizontal well and side track well were recommended for the exploitation, and special protection measures should be taken during development.
