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Multistage Hydrocarbon-Based Fracturing in Tight Gas Formation


 In fields where conventional production methods are applied to effectively recover hydrocarbons, well stimulation is a method to obtain additional production or to increase it at later stages of development. Therefore, well stimulation methods and technologies may be improved during field development after evaluating their influence on hydrocarbon recovery. In the case of hard-to-recover reserves for which economically feasible production requires application of well stimulation methods, these technologies should be designed to the maximum extent in the initial stages of field development and subjected to minor adjustments in future. This paper reviews the approach to screening horizontal well completion and stimulation technologies in low-temperature and low-permeable gas reservoirs with minor formation overpressure. It also describes trial application of oil-based frac technology in a vertical pilot well and its adaptation to multi-zone horizontal well conditions.