1887

Abstract

Summary

Both anhydrite rocks and salt rocks have embrittlement at low temperatures and ductility at high temperatures. The brittle-ductile transition depth of evaporites in Kuqa Basin is 3000m or so. In the late tectonic active period of Kuqa Era, the strong tectonic compression from South Tianshan will generate fractures and faults in evaporites to let hydrocarbon immigrate upward if burial depth shallower than 3000m. However, after evaporites were continuously buried deeper than 3000m, previous faults would be welded to keep good seals. so early oil accumulations were destroyed and late high mature coal gas accumulations were preserved.

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/content/papers/10.3997/2214-4609.201902350
2019-09-08
2024-03-29
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