Vesicle distribution in acidic lava flow units in the rift basins of NE China: implications for petroleum reservoir exploration
Vesicle distribution in acidic lava flow units in the rift basins of NE China: implications for petroleum reservoir exploration
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中国东北裂谷盆地酸性熔岩流单元中的囊泡分布：对油气藏勘探的启示
DOI：
10.1002/gj.2815
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发表时间：
2017-07
影响因子：
1.8
通讯作者：
pujun wang
中科院分区：
文献类型：
--
作者：
jian yi;fengyue sun;pujun wang
酸性熔岩流在中国东北裂谷盆地火山岩序列中占有很大比例。本研究的目的是探索这些盆地中酸性熔岩流中的泡囊分布。选择了中国东北地区两个有代表性的酸性熔岩流出露区进行研究。这些熔岩流具有相似的岩浆来源和化学性质。通过对两个露头区的酸性熔岩流形态（厚度、横向范围）和露头及浅取心井Y1D1的垂向层序的测量，详细确定了酸性熔岩流的类型和内部结构。此外，对松辽盆地长岭地堑的深井数据和三维地震数据的解释提供了额外的厚度和几何数据，作为对露头数据的有力补充。研究表明，酸性熔岩流的形状随着规模的减小而从圆顶状过渡到板状再到辫状。垂向层序可划分为三个带：上部泡囊带、块状核部带和基底带。钻孔厚度数据表明上部囊泡区所占最大比例的趋势：厚流上部囊泡区所占比例相对较低，而薄流上部囊泡区所占比例范围较宽。因此，辫状酸性熔岩流更有可能具有较高比例的上部泡状带。上部泡囊带通常具有高孔隙度和高渗透率，是主要的有效气藏系统。板状酸性熔岩流中的气藏横向分布范围最大，而叠置辫状熔岩流中的气藏所占比例最大。这项研究可以帮助我们更好地了解火山岩油气藏的分布在酸性熔岩序列中遇到的烃类，但钻孔数据是有限的。此外，这项研究是有用的解释酸性熔岩流的测井和地震数据从盆地。版权所有© 2016约翰威利父子有限公司.
Acidic lava flows comprise a large proportion of the total volcanic succession in the rift basins of northeast China. The objective of this study was to explore the vesicle distribution in the acidic lava flows in those basins. Two representative areas with acidic lava flow outcrops in NE China were selected for study. These lava flows share similar magma sources and chemistries. The types and inner structures of the acidic lava flows were determined in detail by measuring the shape of the flows (thickness and lateral extent) and the vertical sequences in the outcrops and shallow coring well Y1D1 in the two outcrop areas. Furthermore, the interpretation of deep borehole data and 3D seismic data from the Changling Graben of the Songliao Basin provided additional thickness and geometry data as a robust complement to the outcrop data. This study revealed that the shapes of the acidic lava flows transition from dome to tabular to braided with decreasing size. Furthermore, the vertical sequences can be classified into three zones: the upper vesicle zone, the massive core zone and the basal zone. The borehole thickness data indicate a trend in the maximum proportions occupied by the upper vesicle zone: thick flows have a relatively low proportion occupied by upper vesicle zones, whereas thin flows display a wide range in the proportion represented by upper vesicle zones. Therefore, braided acidic lava flows are more likely to have a high proportion of upper vesicle zones. Upper vesicle zones usually have high porosity and permeability and represent the primary effective gas reservoir system. The greatest lateral extents of gas reservoirs are usually in the tabular acidic lava flows, but the largest proportions occupied by gas reservoirs are usually in stacked braided lava flows. This study can help us to better understand the distribution of volcanic petroleum reservoirs in acidic lava successions where hydrocarbons are encountered but borehole data are limited. Furthermore, this study is useful for interpreting acidic lava flows in logs and seismic data from basins. Copyright © 2016 John Wiley & Sons, Ltd.
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影响因子：
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作者：
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影响因子：
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作者：
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DOI：
10.1016/j.jvolgeores.2015.09.021
发表时间：
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