Soft rock fracturing popularity has resulted in its wide spread use for stimulated completions in sand control environments. Varying degrees of completion efficiency and production improvements have been observed. More importantly these variances have been difficult to explain. This paper explores anomalies in pressure behavior observed during step rate, calibration testing, and fracturing treatments. This investigation will focus on why the predicted and actual production rates as a function of completion efficiency and skin do not always match. Scenarios will be proposed which can explain both the pressure anomalies and the production variances. The scenarios are constructed using bottom hole pressure data, pressure transient analysis, and production prediction using system analysis.

Keywords:
fracture treatment, pressure anomaly, spe 29444, mullen, calibration injection, well example, skin value, fracture, completion, explanation
Subjects:
Hydraulic Fracturing, Well & Reservoir Surveillance and Monitoring, Reservoir Characterization, Reservoir Fluid Dynamics, Formation Evaluation & Management, Perforating, Flow in porous media, Drillstem/well testing, Completion Installation and Operations, Sand Control
Copyright 1995, Society of Petroleum Engineers
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