AGOCO is facing tremendous challenges to maintain the production of the mature giant Messla field. Water breakthrough, well shut-in due to sanding and reservoir depletion are among the problems causing a decline in the production. In order to maintain production, or even improve it in the near future, new technology and methodology are required to address the current challenges. Geomechanics, through a full characterization of mechanical properties and state of in-situ stresses of the reservoir and overburden formations, plays an essential role in achieving these objectives. This geomechanical knowledge forms a mechanical earth model (MEM) of the field that will enable appropriate technology to be deployed in the field.
To this end, a MEM was constructed by following an integrated process that includes data auditing, geomechanics laboratory testing, determination of mechanical properties and geostresses, and calibration and validation of the model.
The MEM was subsequently applied to improve drilling, production and reservoir management of the field. Sanding prediction was carried out to determine sanding risks in the field and based on the outcome of sanding prediction, sandface completions were optimized to not only minimise the sanding risk but also improve production. Wellbore stability analysis on underbalanced drilling and horizontal drilling was conducted to minimize potential risk to applying the technology to develop the depleted field. And under the guidance of the model, optimization of hydraulic fractures was carried out to help to achieve ultimate goal for maximizing the value of the asset and the investment in drilling and completion of the field.