论鄂尔多斯盆地陕北盐洼镇钾1井奥陶系马四段的重复

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英文篇名：Discussing on the Duplication of O_2m_4 in the Well Zhenjia-1,Northern Shaanxi Salt Depression,Ordos Basin 作者：马占荣 ; 包洪平 ; 黄建松 ; 杨帆 英文作者：MA Zhanrong;BAO Hongping;HUANG Jiansong;YANG Fan;Research Institute of Exploration and Development,Changqing Oilfield Branch,PetroChina Company Limited;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields; 关键词：鄂尔多斯盆地 ; 地层重复 ; 奥陶系马家沟组四段 ; 马五6盐层(奥陶系马家沟组五段6分段) ; 碳同位素 ; 氧同位素 ; 钾盐 英文关键词：Ordos basin;;stratigraphy duplication;;O2m4;;O2m56 salt layer;;stable isotope of carbon and oxygen;;potash 中文刊名：DZLP 英文刊名：Geological Review 机构：中国石油长庆油田分公司勘探开发研究院;低渗透油气田勘探开发国家工程实验室; 出版日期：2019-01-15 出版单位：地质论评 年：2019 期：v.65 基金：中国地质调查局地质调查工作项目“陕北奥陶纪盐盆地钾盐资源调查评价”(编号:1212011085516);; “十三五”国家科技重大专项“大型油气田及煤层气开发”(编号:2016ZX05004-006)的成果~~ 语种：中文; 页：DZLP201901006 页数：11 CN：01 ISSN：11-1952/P 分类号：31-41

摘要

陕北奥陶纪盐洼区钻探的镇钾1井"马五6盐层段"(奥陶系马家沟组五段6分段)出现了异常的岩性组合序列,盐岩厚度大幅度减薄,代之以厚度100 m以上的纯碳酸盐岩地层,这一变化单从沉积学角度无法解释。为了弄清该井异常岩性段的层位归属,开展了岩性组合、测井旋回、碳氧同位素对比和地震剖面多种资料的综合分析。纵向地层岩性、测井旋回特征、碳氧同位素对比分析表明,这套地层是构造复杂化了的异常地层序列,并非原地沉积,厚度超过100 m的碳酸盐岩地层实为马四段(马家沟组四段),与下伏原地正常沉积的马四段重复。地震剖面显示马四段重复可能与塑性盐岩卷入复杂化了的逆断层有关。因此,镇钾1井钻前预测的"马五6盐层段"实际上是以马四段为主的逆冲断片,该井地层存在重复。镇钾1井马四段重复的确认,有助于正确认识陕北盐洼区马五6地层充填序列,推动局部构造—沉积相关研究工作的进一步开展。
        Objectives: The lithological association sequence of the predicted O_2m_5~6 salt layer in the Well Zhenjia-1,drilled in the North Shaanxi Ordovician Depression,is abnormal that is because the salt rock thickness reduced greatly and replaced by pure carbonate strata more than 100 m. These changes can not be reasonably explained according to sedimentary principle. The purpose of this paper is to find out the stratigraphic position of the anomalous carbonate sequence and make reasonable explanation.Methods: The comprehensive analysis of lithological association cycle,log cycle,carbon—oxygen isotope correlation and seismic profile is carried out.Results: Evidences from vertical lithologic cycles and logging cycles,as well as the data of stable isotope of carbon and oxygen revealed that the Fourth member of Ordovician Majiagou formation abbreviated as O_2m_4 was duplicated,and those carbonates more than 100 m actually resembled with the underlying autochthonous O_2m_4 were allochthonous rocks complicated by tectonic. The seismic profile shows that the repetition of the O_2m_4 may be related to the involvement of the plastic salt rock in the complicated thrust fault. Therefore,the so called " O_2m_5~6 salt formation" predicted before drilling in the Well Zhenjia-1 is actually a thrust plate dominated by the O_2m_4,and the formation of this well is duplicated.Conclusions: The so called "O2m_5~6 salt formation " of the Well Zhenjia-1 is an anomalous lithological association sequence which is mainly composed of O_2m_4 as wells as other formations. The confirmation of the repetition of the O2 m4 in the Well Zhenjia-1 contributes to the correct understanding of the filling sequence of the O2m_5~6 strata in the salt depression of Ordos basin,and will promote the further research in the respects of local tectonic and sedimentary.

引文

陈郁华,袁鹤然,杜之岳.1998.陕北奥陶系钾盐层位的发现与研究.地质论评,44(1):100~105.
    陈文西,袁鹤然.2010.陕北奥陶纪盐盆的区域成矿地质条件分析.地质学报,84(11):1565~1575.
    冯增昭,陈继新,张吉森.1991.鄂尔多斯地区早古生代岩相古地理.北京:地质出版社:1~190.
    冯增昭,鲍志东,张永生,谭健,等.1998.鄂尔多斯奥陶纪地层岩石岩相古地理.北京:地质出版社:1~144.
    刘群,杜之岳,陈郁华,等著.1997.陕北奥陶系和塔里木石炭系钾盐找矿远景.北京:原子能出版社:101~113.
    史基安,邵毅,张顺存,付翠琴,白海峰,马占龙,吴志雄.2009.鄂尔多斯盆地东部地区奥陶系马家沟组沉积环境与岩相古地理研究.天然气地球科学,20(3):316~324.
    汤良杰,余一欣,陈书平,万桂梅,金文正.2005,含油气盆地盐构造研究进展.地学前缘,12(4),375~383.
    吴元燕,陈碧钰.1998.油矿地质学.北京:石油工业出版社:193~195.
    杨全喜,李江.1993.陕北奥陶系首次发现钾石盐.化工地质,15(4):223~227.
    余一欣,周心怀,彭文绪,魏刚,吕丁友.2011.盐构造研究进展述评.大地构造与成矿学.35(2):169~182.
    袁鹤然,郑绵平,陈文西,张永生,刘建华.2010.陕北成盐盆地奥陶纪成钾找钾远景分析.地质学报,84(11):1554~1564.
    张永生,郑绵平,包洪平,郭庆,于常青,邢恩袁,苏奎,樊馥,龚文强.2013.陕北盐盆马家沟组五段六亚段沉积期构造分异对成钾凹陷的控制.地质学报,87(1):101~109.
    张永生,邢恩袁,陈文西.2014.国内外古陆表海盆成钾条件对比-兼论华北成钾的可能性.矿床地质,33(5):897~908.
    张永生,邢恩袁,王卓卓,郑绵平,施立志,苏奎,吴素娟,桂宝玲,蒋苏扬,朱常伟.2015.鄂尔多斯盆地奥陶纪马家沟期岩相古地理演化与成钾意义.地质学报,89(11):1921~1935.
    郑绵平,袁鹤然,张永生,刘喜方,陈文西,李金锁.2010.中国钾盐区域分布与找钾远景.地质学报,84(11):1523~1553.
    郑绵平,张震,张永生,刘喜方,尹宏伟.2012.我国钾盐找矿规律新认识和进展.地球学报,33(3):280~294.
    Chen Yuhua,Yuan Heran,Du Zhiyuan.1998&.Discovery and study on Ordovician potash salt horizons in Northern Shaanxi.Geological Review,44(1):100~105.
    Chen Wenxi,Yuan Heran.2010&.Regional ore-forming geological conditions of the Ordovician northern Shanxi salt basin.Acta Geologica Sinica,84(11):1565~1575.
    Feng Zengzhao,Chen Jixin,Zhang Jisen.1991&.Paleogeography in the Early Palaeozoic Era in Ordos Area.Beijing:Geological Publishing House:1~190.
    Feng Zengzhao,Bao Zhidong,Zhang Yongsheng,Tan Jian,et al.1998&.Stratigraphy Petrology Lithofacies Paleogeography of Ordovician in Ordos.Beijing:Geological Publishing House:1~144.
    Liu Qun,Du Zhiyuan,Chen Yuhua,et al.1997&.Potash salt-searching prospects in Northern Shanxi Ordovician and Tarim Carboniferous.Beijing:Atomic Energy Press:101~113.
    Shi Ji’an,Shao Yi,Zhang Shuncun,Fu Cuiqin,Bai Haifeng,Ma Zhanlong,Wu Zhixiong.2009&.Lithofacies paleogeography and sedimentary environment in Ordovician Majiagou formation,eastern Ordos basin.Natural gas geoscience,20(3):316~324
    Tang Liangjie,Yu Yixin,Chen Shuping,Wan Guimei,Jin Wenzheng.2005&,Major developments of research on salt tectonics in oilgas-bearing basins.Earth Science Frontiers,12(4):375~383.
    Wu Yuanyan,Chen Biyu.1998#.Oilfield Geology.Beijing:Petroleum Industry Press,2nd version 2nd printed,193~195
    Yang Quanxi,Li Jiang.1993&.First discovery of sylvite mineral in the Majiagou Formation of Ordovician age in North Shaanxi Province.Geology of Chemical,Minerals,15(4):223~227.
    Yu Yixin,Zhou Xinhuai,Peng Wenxu,Wei Gang,LüDingyou.2011&,An Overview on Salt Structures.Geotectonica ET Metallogenia,35(2):169~182.
    Yuan Heran,Zheng Mianping,Chen Wenxi,Zhang Yongsheng,Liu Jianhua.2010&.Potash prospects in the Ordovician Northern Shaanxi Salt Basin.Acta Geologica Sinica,84(11):1554~1564.
    Zhang Yongsheng,Zheng Mianping,Bao Hongping,Guo Qing,Xing Enyuan,Su Kui,Fan Fu,Gong Wenqiang.2013&.Tectonic differentiation of O2m56deposition stage in salt basin,Northern Shaanxi,and its control over the formation of potassium sags.Acta Geologica Sinica,87(1):101~109.
    Zhang Yongsheng,Xing Enyuan,Chen Wenxi.2014&.Comparative study of palaeo-epicontinental marine basin potash-forming conditions between China and foreign countries with special reference to potashforming possibilities in North China.Mineral Deposits,33(5):897~908.
    Zhang Yongsheng,Xing Enyuan,Wang Zhuozhuo,Zheng Mianping,Shi Lizhi,Su Kui,Gui Baoling,Wu Sujuan,Jiang Suyang,Zhu Changwei.2015&.Evolution of lithofacies paleogeography in the Ordos basin and its implication of potash formation.Acta Geologica Sinica,89(11):1921~1935.
    Zheng Mianping,Yuan Heran,Zhang Yongsheng,Liu Xifang,Chen Wenxi,Li Jinsuo.2010&.Regional Distribution and Prospects of Potash in China.Acta Geologica Sinica,84(11):1523~1553.
    Zheng Mianping,Zhang Zhen,Zhang Yongsheng,Liu Xifang,Yin Hongwei.2012&.Potash exploration characteristics in China:New understanding and research progress.Acta Geoscientica Sinica,33(3):280~294.