Seismite Feature and Its Reservoir Quality of Shahejie Formation of Paleogene in Jiyang Depression

Abstract

Abstract: Based on core observation, thin section and imaging logging analyses, seismite is recognized in the upper part of Member 4 and Member 3 of Shahejie formation of Paleogene in Jiyang depression. Such a rock features soft sediment deformation structures, including liquefied sand and shale veins, liquefied convolute lamination, step microfault, pillow and ball structures, beaded structure, carbonate micrite vein, autoclastic brecciated structure and pseudonodule, etc. Study shows that sedimentary period of Member 4-Member 3 of Shahejie formation is the intense activity period of the basin boundary fault. The obvious effect of seismism on hydrocarbon reservoir quality greatly improves the reservoir permeability whereas the improved porosity is seldom found. It is concluded that Seismite, especially the shattered rock and seismic-clastic breccia are as potential reservoir rocks. This provides new areas for petroleum exploration and development in the near future here.

Key words: Jiyang depression, Paleogene, seismite, feature

CLC Number:

TE112.221

GONG Li-qing, YANG Jian-ping. Seismite Feature and Its Reservoir Quality of Shahejie Formation of Paleogene in Jiyang Depression[J]. Xinjiang Petroleum Geology, 2007, 28(1): 44-47.

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