Sedimentary Characteristics and Control Factors of Upper Palaeozoic in Dagang Exploration Area
Hou Zhongshuai
Chen Shiyue
Yan Jihua
Fu Lixin
Li Hongjun
Feng Jianyuan
Abstract：Dagang exploration area has become an important replacement reservoir field thanks to recent break throughs in its Upper Paleozoic showing good exploration prospects.However,its exploration degree stays low because further exploration of series of strata and well deployment is restricted due to our lack of understanding of the types of sedimentary facies and sedimentary evolution.Based on sedimentology theories,study of cores,slices,well log and logging,types of sedimentary facies and evolution process of every formation in Dagang exploration area of Upper Paleozoic are determined,and the controlling factors of sedimentary facies development are analyzed in this paper.Results show that Benxi Formation in Dagang are adevelops barrier coast facies and carbonate platform facies,Taiyuan Formation develops barrier coast facies,carbonate platform facies and wet land facies,Shanxi Formation develops shallow delta facies,and lower Shihezi and upper Shihezi Formation develops fluvial facies.The type of sedimentary facies from Benxi formation to the upper Shihezi Formation reflects the start,development and decline process of transgression in late Paleozoic.Tectonism,sea level changing and paleoclimate all control the development of sedimentary facies types.
Keywords：upper paleozoicsedimentary faciessedimentary evolutioncontrol factorsDagang exploration areapetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：15( 2055-2068,2104 )