DOSAS are committed to helping clients achieve production optimization, from reservoir to refinery. One of the key solutions offered is an integrated approach to production optimization, with full analysis, whether the project be for a single well, a cluster of wells, or in full field development projects.
Cluster Integrated Production Optimization Workflow
The integrated optimization approach for a cluster of wells, or full field is similar to the single well approach, but consideration and modelling exercises must be applied to surrounding wells.
Cluster of Full Field Integrated Production Optimization Workflow
Data Gathering for full field involves gathering entire production history for oil and gas, and also observing water production characteristics. Thereafter, it is also essential, as with single well data gathering, that detailed descriptions of the reservoir, completion, geomechanics and hydrocarbon fluid in place are acquired.
Cluster or Full Field Data Analysis
It is essential to understand full field behaviour and drive type, and then understand reservoir level behaviour, before identifying individual wells for optimization. Once this behaviour is understood, either clusters can be selected for modelling or the full field. Similar methods to single well modelling can be employed, and applied to several wells; inflow performance and tubing intake curves can be modelled for a multi-well system, that considers flow capacity at surface as well. Alternatively, 3D simulation software can be used to model a multi-well system, and calibrated by matching simulated production to actual production data.
Cluster or Full Field Optimization
Wells for optimization can be chosen by a ranking system, and categorizing wells to find out which wells are most in need of intervention. Methods such as creating heterogeneity indices are useful for selecting wells that have similar issues that need to be addressed, for example, it can allow for choosing wells within the same cluster or field that have a high water cut, and therefore may be considered for water shut off treatments. Examining the full field will also ensure that neighbouring wells for each candidate are understood, and may bring light to any risks involved.
Cluster or Full Field Modelling
Cluster or full field modelling will allow for understanding how production will be improved by intervention treatments (also to be designed and modelled within this phase for each candidate well), and how the multi-well system will respond. This may further identify bottlenecks in the system if incremental production increase cannot be handled by the flowlines in place. Sensitivity analysis can also be carried out to determine the optimum treatments for each well in the cluster of field. Full field modelling is important for realising the potential of the field.
Production Modelling and Economic Analysis
Based on results from simulations, and any sensitivity analysis carried out, an economic analysis can be carried out to understand the economic viability of intervention projects, and optimum treatments versus incremental production increase.