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Cenozoic Tectonic Deformation Time Sequence and Its Geological Significance in Kekeya Anticline(PDF)

《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

Issue:
2018年05期
Page:
501-
Research Field:
Publishing date:

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Title:
Cenozoic Tectonic Deformation Time Sequence and Its Geological Significance in Kekeya Anticline
Author(s):
LING Dongming12 HAN Yaozu2 BAI Jianpu2
(1.School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China; 2. Korla Branch, Geophysical Research Institute, BGP, CNPC, Korla, Xinjiang 841001, China)
Keywords:
Kekeya anticline Kalatar formation Cenozoic growth stratum forward modeling tectonic deformation time sequence
PACS:
TE111.2
DOI:
10.7657/XJPG20180501
Abstract:
Based on the high-resolution 3D seismic data and taking the structure forward modeling and growth strata analysis as constraint conditions, this paper redefines the structural deformation time sequence of the Kekeya anticline. The results show that Kekeya anticline underwent three periods of tectonic activity superpositions, namely Late Miocene, Early Pleistocene and Middle-Late Pleistocene during Cenozoic. The period of Late Miocene was characterized by horizontal overriding, during which a large number of low-angle faults were formed in the Kalatar formation. The Kekeya anticle was located at the lower structural positions in Early Pleistocene and was characterized by receiving deposits; the period of Middle-Late Pleistocene was characterized by high-speed vertical uplifting, during which a large number of high-angle adjusting faults occurred in the core of the anticline, resulting in the uplifting of the Pleistocene thick sediments at the lower positions to the higher positions of the anticline and the forming of the current structural shapes. With the new structure development pattern, several sets of superimposed fault blocks of high-quality reservoirs are found in the core and northern flank of Kekeya anticline. The superposition of multistage faults can effectively improve the physical properties of local reservoirs, and promote oil and gas migration and accumulation into the Kalatar formation, which deepens the understanding of Kekeya condensate reservoirs and provides new targets for further exploration and development

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Last Update: 2018-10-09