Producing from four formations, including:

• Burdigalian (Helvetian)
• Sarmatian
• Meotian
• Oligocene(Targu Jiu area)

It is producing from 1953 to the present day.

Out of a total of 1,282 wells drilled since the fields started producing, currently, there are 200 active wells in the seven fields, with a total production of around 2,500 bbls of oil/day and 250 kscm of gas/day. This is more than 50% above baseline after 2 years of investment and operatorship.

What are the main issues we identified in and how did we manage to overcome them?

As the fields have been producing for more than 50 years,  problems specific to mature fields were encountered, both related to geological data and operations.

In terms of data, the main issue encountered was having an incomplete geological database to work with, the available data having insufficient detail level to explain the geological issues. In the same time, assumptions of the geological model were not always clear.

As for the operational side, we encountered several issues, including but not limited to:

• poor reservoir flowing properties, with stimulation jobs required;
• production back-allocation;
• poor or unconsolidated formations;
• formation damage during drilling;
• high heterogeneity of reservoirs;
• quality of well construction.

How did we deal with such issues?

We divide our planned works into short-mid and mid-long term goals.

In terms of short-mid term works, we conduct the following operations:

• production and pressure monitoring for keeping hydrocarbon production and wells  in function
• well by well peer-review done quarterly
• reservoir studies that were done in house by integrating all the available data into a coherent model

In the mid-long term, we make:

• WO programs, gradually, to cover as many wells with dysfunctionalities as possible every year
• drilling new wells as found necessary
• water injection
• restarting production in wells that have potential
• Infill drilling analysis