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Tectonic Transition Relationship between Shawan Sag and Western Well Pen-1 Sag and Its Geological Significance(PDF)

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

Issue:
2018年03期
Page:
277-
Research Field:
Publishing date:

Info

Title:
Tectonic Transition Relationship between Shawan Sag and Western Well Pen-1 Sag and Its Geological Significance
Author(s):
WU Songtao1 LIANG Yusheng1 ZHANG Lei1 TIAN Aijun2
(1.School of Energy Resources, China University of Geosciences, Beijing 100083, China; 2.Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China)
Keywords:
Junggar basin western Well Pen-1 sag Shawan sag Hercynian movement tectonic transition relationship paleohigh
PACS:
TE111.2
DOI:
10.7657/XJPG20180304
Abstract:
Based on the seismic and drilling data and combining with geological sections, the paper discusses the the structural geometry and the characteristics of movement of the transitional zone from Shawan sag to the western Well Pen-1 sag by using fault-related fold theories. The study shows that a paleohigh exists in the transitional zone, which exhibits a NW-SE trending, irregular strip. Based on which, through the structural model establishment of the transitional zone from Shawan sag to the western Well Pen-1 sag, it is considered that the basement of the paleohigh had a pattern of “uplift plus semi-graben” and was controlled by both back-thrust reverse basement fault and extensional normal fault, and changed to a pattern of “sole uplift” after the Middle Permian. The forming process of the paleohigh can be divided into 5 periods such as the prototype period from the Late Carboniferous to Early Permian, the development period at the early Middle Permian, the peak period at the late Middle Permian, the inherited period from the Late Permian to Middle Jurassic and the reconstruction period from the end of the Middle Jurassic up to now

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Last Update: 2018-05-31