Abstract

Recently developed wireline formation tester technology, namely a high rate pump module and improved packer elements, has allowed microfracturing data to be acquired in high permeability, high leak-off environments. This paper examines some of the major influencing factors on the microfrac pressure data and consequently the derived closure pressures, to help understand how representative a stress derived from a small scale measurement might compare to the far field stress. Data from a case study from the Norwegian continental shelf is presented, the detailed analysis of which has improved the understanding of the technique and acquired data. This has allowed some existing interpretation techniques to be extended and operational best practices to be developed.

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