白音查干凹陷下白垩统腾格尔组砾质滩坝沉积特征

doi:10.11743/ogg20150411

石油与天然气地质 ›› 2015, Vol. 36 ›› Issue (4): 612-620.doi: 10.11743/ogg20150411

白音查干凹陷下白垩统腾格尔组砾质滩坝沉积特征

高红灿¹, 肖斌², 郑荣才³, 刘云², 谭先锋¹, 尚雅珍⁴, 张彬⁵

1. 重庆科技学院石油与天然气工程学院, 重庆 410331;
2. 中国石化中原油田分公司物探研究院, 河南濮阳 457001;
3. 成都理工大学油气藏地质与开发工程国家重点实验室, 四川成都 610059;
4. 中国石化中原油田分公司勘探开发科学研究院, 河南濮阳 457001;
5. 中国石化中原石油工程有限公司钻井二公司, 河南濮阳 457001

收稿日期:2014-08-26 修回日期:2015-05-20 出版日期:2015-08-08 发布日期:2015-08-28
第一作者简介:高红灿(1969—),男,副教授,沉积学。E-mail:gaohongcan@126.com。
基金项目:
重庆市科委前沿与应用基础研究(一般)项目(cstc2014jcyjA90022);国家自然科学基金项目(41202043)。

Sedimentary characteristics of gravelly beach-bar in the Lower Cretaceous Tenggeer Formation of Baiyinchagan sag, Erlian Basin

Gao Hongcan¹, Xiao Bin², Zheng Rongcai³, Liu Yun², Tan Xianfeng¹, Shang Yazhen⁴, Zhang Bin⁵

1. School of Petroleum Engineering, Chongqing University of Science & Technology, Chongqing 410331, China;
2. Geophysical Research Institute of Zhongyuan Oilfield Company, SINOPEC, Puyang, Henan 457001, China;
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
4. Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang, Henan 457001, China;
5. No.2 Drilling Company, Zhongyuan Petroleum Engineering Co.Ltd., SINOPEC, Puyang, Henan 457001, China

Received:2014-08-26 Revised:2015-05-20 Online:2015-08-08 Published:2015-08-28

摘要/Abstract

摘要：

为了阐明二连盆地白音查干凹陷南部缓坡带达尔其-锡林好来地区结合部的下白垩统腾格尔组底部砾质滩坝沉积特征，在区域地质背景分析基础上，应用岩心和测井等资料，通过砾质滩坝砾岩的空间发育、结构、沉积构造及垂向沉积序列等特征分析，指出砾质滩坝砾岩呈薄层夹于泥石流砂砾岩及含砾砂泥岩沉积中；砾质滩坝砾岩中砾石磨圆较好但分选较差，杆状、扁平状砾石相对较多；砾石最大扁平面／长轴相对具一定的双向排列；砾质滩坝底部与泥石流沉积呈渐变接触并呈逆粒序，而顶部与浅湖泥或泥石流沉积多呈突变接触，整体上表现为逆—正粒序、正—逆粒序等的垂向交替变化。研究区砾质滩坝的沉积模式主要为滨浅湖波浪对早期泥石流沉积进行淘洗、簸选，其中易搬运的细粒碎屑被带入浅湖形成砂质滩坝，而难搬运的砾石则留在原地形成砾质滩坝，二者之间可能发育有沟槽。其形成条件主要有4个——较强的水动力、较平坦的地形、低位体系域发育期以及适量的物源。

关键词: 砾质滩坝, 腾格尔组, 下白垩统, 白音查干凹陷, 二连盆地

Abstract:

In order to demonstrate the sedimentary characteristics of gravelly beach-bar in the Lower Cretaceous Tenggeer Formation in the joint area of the Xilinhaolai and Daerqi of the southern gentle slope of the Baiyinchagan sag, Erlian Basin, abundant cores and logging data were utilized to analyze the spatial distribution, texture, sedimentary structure and vertical sedimentary sequences in the context of regional geological setting.The beach-bar conglomerates occur in the debris flow conglomerates and pebble sandstone-mudstone as thin interbeds, featuring in fair roundness but worse sorting, relative abundance of pebbles with barred and flat shape, and Janus configuration of maximum flat plain/major axis.It is in gradational contact with the underlying debris-flow deposits featuring in reverse grading, while it is in abrupt contact with the overlying shallow lake mudstones or debris-flow deposits, featuring, as a whole, in vertical alternation of reverse and normal grading.The sedimentary model in the study area is dominated by elutriation and winnowing of the early debris-flow deposits by the waves in the waterfront and shallow lacustrine.The fine-grained clasts were transported to the shallow lake to form the sandy beach-bar, while the pebbles stayed to form gravelly beach-bar, with troughs possibly occurring between these two deposits system.They were formed under 4 main conditions, namely the powerful water strength, low relief landform, low system tract(LST)and suitable sedimentary sources.

Key words: gravelly beach-bar, Tenggeer Formation, Lower Cretaceous, Baiyinchagan sag, Erlian Basin

中图分类号:

TE121.3

高红灿,肖斌,郑荣才,等. 白音查干凹陷下白垩统腾格尔组砾质滩坝沉积特征[J]. 石油与天然气地质, 2015, 36(4): 612-620. doi: 10.11743/ogg20150411 Gao Hongcan,Xiao Bin,Zheng Rongcai,et al. Sedimentary characteristics of gravelly beach-bar in the Lower Cretaceous Tenggeer Formation of Baiyinchagan sag, Erlian Basin[J]. Oil & Gas Geology, 2015, 36(4): 612-620. doi: 10.11743/ogg20150411

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白音查干凹陷下白垩统腾格尔组砾质滩坝沉积特征

Sedimentary characteristics of gravelly beach-bar in the Lower Cretaceous Tenggeer Formation of Baiyinchagan sag, Erlian Basin

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