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Junggar Basin Beisantai ditch Permian sedimentary facies Indus

Author: ZhangLiLi
Tutor: YangJunSheng
School: China University of Petroleum
Course: Geology
Keywords: Indus ditch group Sequence stratigraphic framework Source analysis Sedimentary facies
CLC: P618.13
Type: Master's thesis
Year: 2011
Downloads: 144
Quote: 1
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Abstract


In this paper, sequence stratigraphy theory and methods, a comprehensive analysis of the drilling, core, log and three-dimensional seismic data that Permian Indus ditch Beisantai group a three sequence (SQP3wt), its top and bottom interface with a sequence boundary characteristics, named PSB1 and TSB2. Indus ditch sequences identified within the six parasequences interface and a maximum flooding surface, the Indus group is divided into two ditch systems tracts and seven parasequence sets (PS1, PS2, PS3, PS4, PS5 , PS6, PS7). Which, PS1-PS4 is water into the system domain, PS5-PS7 is water regressive systems tract. Division plan accordingly established in the drilling section on the Indus Beisantai ditch Permian sequence (SQP3wt) Parasequence sequence stratigraphic level correlation framework. In this sequence stratigraphic framework within provenance analysis, types of sedimentary facies and sedimentary facies research. There are three main areas that Beisantai provenance system, respectively carat beautiful mountains from the north, south and north Bogda three protrusions. Kelameili Bogda Mountains and deposited in SQP3wt sequence continued for the source. Beisantai raised in the water intake systems tract deposition uplift eroded as the source area; water regressive systems tract deposition, erosion and Beisantai projections due to tectonic subsidence but not underwater, provenance is no longer available. By analyzing the rock types, sedimentary structures, debris particle characteristics, such as logging facies facies indicators that Indus ditch sequence (SQP3wt) Developmental fan delta, delta and lacustrine facies three kinds of sedimentary facies. Fan delta front facies mainly developed, especially in front subfacies underwater distributary channel and underwater distributary channel microfacies among the most developed; study area also developed delta front facies based, the main types of micro-phase as far Shaba and mouth bar can also be identified underwater distributary channel, among other underwater distributary channel microfacies. Lakes phase shallow lake facies and semi-deep lake - deep lake facies are developed, but can also see the small beach bar sedimentary body. Indus ditch sequence transgressive systems domain dominated fan delta deposits of sedimentary system developed three were beautiful mountains in northern carat fan delta depositional systems, southern Bogda fan delta depositional systems and peripheral Beisantai raised fan delta depositional systems; water regressive systems tract deposition Beisantai raised peripheral deposition system disappeared, the study area only developed two depositional systems, namely the northern Kelameili delta system and the southern mountain Bogda delta system.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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