Infill drilling is now recognized as a viable improved recovery process. However, the reliable prediction of incremental recovery by infill drilling cannot be readily and accurately determined by present techniques.

As an alternate approach, a DOE sponsored infill drilling predictive model (IDPM) was evaluated. Its performance was improved by x2adjusting some of its key parameters based on the comparison of actual field recoveries with model results.

Also discussed in the paper is the sensitivity of infill recovery to areal and vertical heterogeneities. Also highlighted is the importance of applying remedial techniques is highlighted, such as near well plug backs and in-depth mobility control upon the recovery efficiency.

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