准噶尔盆地南缘大龙口剖面二叠系梧桐沟组沉积相剖析
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1.中国石化胜利油田滨南采油厂;2.新疆大学地质与矿业工程学院;3.中国石油化工股份有限公司胜利油田分公司

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P512.31

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辫-曲体系的探地雷达相及其定量三维沉积构型研究


Sedimentary phase analysis of the Permian Wutonggou Formation in the Dalongkou section of the southern Junggar Basin
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Sinopec Shengli Oilfield Binnan Oil Production Plant

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    摘要:

    为了理清上二叠统梧桐沟组沉积环境,本文以准噶尔盆地南缘大龙口剖面为例,通过分析岩性、岩相类型,岩相组合、解剖剖面砂体的空间展面规律,得到以下认识。(1)总结了梧桐沟组3类8种能够表征成因砂体的砾、砂、泥岩相;(2)基于岩相,进一步建立了四种岩相组合类型,分别代表了边滩、越岸决口扇、河漫滩砂体;(3)通过对剖面岩相组合的分析,发育的5套砂体进一步可识别出在梧桐沟组时期,发育边滩、决口扇、河漫滩沉积亚相,并建立随着湖平面变化的曲流流河沉积响应模式。

    Abstract:

    In order to clarify the depositional environment of the Upper Permian Wutonggou Formation, this paper takes the Dalongkou section at the southern margin of the Junggar Basin as an example, and obtains the following understanding by analyzing the lithology, lithofacies types, lithofacies assemblages, and spatial spreading laws of anatomical section sands.(1)Three types of eight gravel, sand, and mudstone phases capable of characterizing diagenetic sands in the Wutonggou Formation are summarized;(2)Based on the lithofacies, four lithofacies assemblage types were further established, representing the sidetracks, the cross-bank breakout fan, and the fluvial sands, respectively;(3)By analyzing the lithofacies assemblage of the profile, the five sets of sand bodies developed can further be identified to develop the subphases of sidetrack, decisive fan, and river floodplain deposition during the period of Wutonggou Formation, and to establish a model of the depositional response of the curvilinear flow river with the change of the lake level.

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杨志浩,姚宗全,汪勇,等. 准噶尔盆地南缘大龙口剖面二叠系梧桐沟组沉积相剖析[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-02-23
  • 最后修改日期:2024-05-07
  • 录用日期:2024-05-21
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