准噶尔盆地侏罗纪车-莫古隆起的发育阶段及其对沉积体系的制约
作者:
作者单位:

1.中国海洋大学海洋地球科学学院;2.中石化股份公司胜利油田分公司勘探开发研究院

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基金项目:

中国石油化工股份有限公司胜利油田分公司科技攻关项目(编号:30200018-21-ZC0613-0075)


Development Stage of Jurassic Che-Mo Paleouplift in Junggar Basin and its Constraints on Sedimentary System
Author:
Affiliation:

1.College of Marine Geosciences,Ocean University of China;2.The Exploration and Development Research Institute,Shengli Oilfield Sinopec,Dongying Shandong

Fund Project:

Science and technology research project of Sinopec Shengli Oilfield Company (No. 302000018-21-zc0613-0075)

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    摘要:

    准噶尔盆地车-莫同沉积古隆起是影响侏罗系结构样式和储层分布特征的重要地貌单元。当前已对车-莫古隆起的几何形态、分布范围、演化阶段和形成机制有了深入研究。本文基于盆地腹部41口井的测井数据和地震资料,对侏罗系砂体和地层结构进行了详细分析和等时性对比,重点阐述车-莫古隆起阶段性发育与准噶尔盆地周缘造山带,尤其是博格达山的协同演化及这种协同演化对盆地边界和沉积格局等的影响。车-莫古隆起在侏罗纪的形成和演化不仅影响到盆地的沉积地貌,也使盆地边界、物源格局发生重大改变,并导致沉积体系、地层结构样式和分布规律等的显著变化。这些变化对砂体展布和油藏分布规律等均会产生重要影响。车-莫古隆起的演化可划分为初始发育、快速隆升和隆升后剥蚀等三个阶段。早侏罗世车-莫古隆起的初始发育对八道湾组和三工河组展布和结构样式没有影响或影响很小,研究区由西北部扎伊尔山和东北部克拉美丽山供源,主要形成辫状河三角洲沉积体系;中侏罗世为车-莫古隆起的快速隆升阶段,除了西北部扎伊尔山和东北部克拉美丽山供源之外,博格达山也同步隆出水面开始供源,导致盆地边界、地层分布及结构样式的重大转变,使得西山窑组一段、二段大面积超覆、西山窑组三段沉积缺失或遭受剥蚀,沉积体系也随之发生转变,形成辫状河三角洲和滩坝共存的沉积体系组合;中侏罗世晚期和晚侏罗世车-莫古隆起隆升出水面则导致头屯河组和齐古组的剥蚀缺失,形成了与白垩系的区域不整合面。

    Abstract:

    Che-Mo Synsedimentary paleouplift in Junggar basin is an important geomorphic unit that affects the structural style and reservoir distribution characteristics of Jurassic. At present, the geometry, distribution range, evolution stage and formation mechanism of Che-Mo paleouplift have been deeply studied. Based on the logging data and seismic data of 41 wells in the abdomen of the basin, this paper makes a detailed analysis and isochronous comparison of Jurassic sand body and stratigraphic structure, and focuses on the synergistic evolution between the phased development of Che-Mo paleouplift and the orogenic belt around Junggar basin, especially Bogda mountain, and its influence on the basin boundary and sedimentary pattern. The formation and evolution of Che-Mo paleouplift in Jurassic not only affected the sedimentary landform of the basin, but also significantly changed the basin boundary and provenance pattern, and led to significant changes in sedimentary system, stratigraphic structure style and distribution law. These changes will have an important impact on sand body distribution and reservoir distribution. The evolution of Che-Mo paleouplift can be divided into three stages: initial development stage, rapid uplift stage and post uplift denudation stage. The initial development stage of Early Jurassic Che-Mo paleouplift has no or little influence on the distribution and structural style of Badaowan Formation and Sangonghe formation. The study area is supplied by Zhayier mountain in the northwest and Kelameili mountain in the northeast, mainly forming braided river delta sedimentary system; The Middle Jurassic was the rapid uplift stage of Che-Mo paleouplift. In addition to the source supply of Zhayier mountain in the northwest and Kelameili mountain in the northeast, Bogda mountain also rose out of the water at the same time and began to supply the source, resulting in significant changes in basin boundary, stratigraphic distribution and structural style, resulting in large-area overlap of the first and second members of Xishanyao Formation, loss or denudation of the third members of Xishanyao Formation, The sedimentary system combination of Braided River Delta and beach bar is formed; The uplift of Che-Mo paleouplift in late Middle Jurassic and late Jurassic resulted in the denudation loss of Toutunhe Formation and Qigu formation, forming a regional unconformity with Cretaceous.

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  • 收稿日期:2022-03-22
  • 最后修改日期:2022-05-31
  • 录用日期:2022-06-19
  • 在线发布日期: 2023-02-15
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