Major Negative Reverse Fractures and Their Control over Petroleum in the North of Shaya Uplift, Tarim Basin
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Abstract
Luntai, Yanan and Yal and Ya2 fractures in thenorth of Shaya uplift in Tarim basin are negative reversefractures. The main reverse phase of Luntai fracture wasSuweiyi-Jidike age of Miocene, while that of Yananfracture was Early Cretaceous, that of Ya1 fracture wasSuiweiyi age of Miocene, that of Ya2 fracture was LateCretaceous to Early Tertiary. The formation of negativereverse fractures were mainly controlled by local tensionstress field and pre-existent structural features. Thesefractures controlled the forming of structural traps andtheir barrier conditions and acted as vertical migrationpaths of oil and gas during the formation of oil pools.
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