西藏伦坡拉盆地牛堡组层序地层与沉积充填模式
发布时间：2018-07-15 11:10
【摘要】：通过对伦坡拉盆地的地震、测井、岩心、露头等资料的综合分析,建立了伦坡拉盆地牛堡组的层序地层格架,将牛堡组划分为1个一级层序,3个二级层序(对应于牛一段、牛二段、牛三段地层),7个三级层序(自下而上依次为SQ1、SQ2、SQ3、SQ4、SQ5、SQ6和SQ7);依据牛堡组的层序地层特征,归纳出弯折带型和断坡带型2种层序构成样式。弯折带型层序构成样式中,高位体系域在缓坡区发育的扇三角洲、低位体系域在坡折内发育的大型低位扇,以及断坡带型层序构成样式中,坡折内发育的高位辫状河三角洲与大型低位扇,为勘探储层的有利目标。通过对各层序的沉积体系时空展布的研究,建立了研究区牛堡组沉积期的沉积模式,并认为该时期主要发育3大连片砂体,即北部、西南部和东部砂体,砂体的展布受坡折带控制明显。
[Abstract]:Based on the comprehensive analysis of seismic, logging, core and outcrop data in Luompola Basin, the sequence stratigraphic framework of Niubu formation in Luompola Basin is established. The Niubu formation is divided into one first order sequence and three second order sequences (corresponding to Niuyi formation). There are seven third-order sequences (SQ1SQ2SQ2SQ3SQ3SQ4SQ5SQ6 and SQ7) in Niu member, Niu 3 formation, and according to the sequence stratigraphic characteristics of Niupu formation, two types of sequence composition patterns, bended zone type and fault slope zone type, are concluded. In the bended belt type sequence formation style, the upper system tract is developed in the fan delta in the gentle slope area, the low position system tract develops in the large low fan in the slope break, and the fault slope belt type sequence forms the style, the low position system tract develops in the gentle slope area, the low position system tract develops in the slope break type sequence constitutes the style, High braided river delta and large low fan developed in slope break are favorable targets for reservoir exploration. Based on the study of the temporal and spatial distribution of the sedimentary systems of each sequence, the sedimentary model of the Niupu formation in the study area was established, and it was considered that there were mainly 3 pieces of sand bodies in Dalian, namely, the northern, southwest and eastern sandbodies. The distribution of sand body is obviously controlled by slope break zone.
【作者单位】： 中国地质大学(武汉)构造与油气资源教育部重点实验室;中国地质大学(武汉)资源学院;中国石化勘探南方分公司;
【基金】：国家重点基础研究发展计划(“973”计划)项目(SQ2013CB021013) 国家自然科学基金项目(41002045)资助
【分类号】：P618.13
本文编号：2123869
[Abstract]:Based on the comprehensive analysis of seismic, logging, core and outcrop data in Luompola Basin, the sequence stratigraphic framework of Niubu formation in Luompola Basin is established. The Niubu formation is divided into one first order sequence and three second order sequences (corresponding to Niuyi formation). There are seven third-order sequences (SQ1SQ2SQ2SQ3SQ3SQ4SQ5SQ6 and SQ7) in Niu member, Niu 3 formation, and according to the sequence stratigraphic characteristics of Niupu formation, two types of sequence composition patterns, bended zone type and fault slope zone type, are concluded. In the bended belt type sequence formation style, the upper system tract is developed in the fan delta in the gentle slope area, the low position system tract develops in the large low fan in the slope break, and the fault slope belt type sequence forms the style, the low position system tract develops in the gentle slope area, the low position system tract develops in the slope break type sequence constitutes the style, High braided river delta and large low fan developed in slope break are favorable targets for reservoir exploration. Based on the study of the temporal and spatial distribution of the sedimentary systems of each sequence, the sedimentary model of the Niupu formation in the study area was established, and it was considered that there were mainly 3 pieces of sand bodies in Dalian, namely, the northern, southwest and eastern sandbodies. The distribution of sand body is obviously controlled by slope break zone.
【作者单位】： 中国地质大学(武汉)构造与油气资源教育部重点实验室;中国地质大学(武汉)资源学院;中国石化勘探南方分公司;
【基金】：国家重点基础研究发展计划(“973”计划)项目(SQ2013CB021013) 国家自然科学基金项目(41002045)资助
【分类号】：P618.13
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