Japan frac succeeds in deep, naturally fractured volcanics

A multistage treatment successfully stimulated a well in the deep, hot, and naturally fractured volcanic rock of the Minami-Nagaoka field, Niigata Prefecture, Japan. The treatment involved six propped fracturing stages.Initial production response was 16 MMscfd, significantly above economic target of 10 MMscfd.Successful development of the northern part of the Minami-Nagaoka reservoir could significantly affect Japan's domestic natural gas production, although previous proppant placement in this field has proven difficult.1 2 Two propped fracturing treatments pumped more than a decade ago failed with only about 20% of the designed proppant placed before screen-outs prematurely terminat...

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