DEVELOPMENT OF OIL LEG RESERVOIRS
Upgrading efficiency of oil leg reservoirs development (the so-called oil rims, i.e. oil-bearing sections in gas fields) is one of the key priorities for Gazprom Neft . So, it makes it possible to enhance productivity of the Company’s large fields that are currently at the initial stage of development: Novoportovskoye and Messoyakha fields. In addition, the experience and competence in developing oil rims is required to bring new reserves on stream at brown fields.
When developing oil leg reservoirs, many methods that are already successfully applied by the Gazpromneft Science and Technology Center at the company’s more conventional oil reservoirs should be selected from scratch. A massive amount of gas gives rise to the risk of breakthrough into oil reservoirs impairing the effectiveness of such oil displacement techniques as water-flooding. Therefore, one of the challenges facing the company’s Science and Technology Center is identifying alternative ways of developing oil leg reservoirs to address emerging problems.
Oil legs in the fields already producing gas demand yet a different approach. Oil reservoirs at such fields do not perform well enough, therefore the Science and Technology Center designs enhanced recover techniques for them. A separate task facing the STC is putting together an integrated approach to developing oil rims where the reservoir geology and the subsurface & surface infrastructure are built into a single concept.