Relationship between the later strong gas-charging and the improvement of the reservoir capacity in deep Ordovician carbonate reservoir in Tazhong area, Tarim Basin
Relationship between the later strong gas-charging and the improvement of the reservoir capacity in deep Ordovician carbonate reservoir in Tazhong area, Tarim Basin
复制标题
塔里木盆地塔中地区深层奥陶系碳酸盐岩后期强烈充注与储层能力提高的关系
DOI：
10.1007/s11434-009-0457-z
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发表时间：
2009-07
期刊：
影响因子：
--
通讯作者：
WANG HongJun
中科院分区：
文献类型：
--
作者：
SUN YuShan;ZHAO XueFeng;ZHANG ShuiChang;ZHAO WenZhi;ZHU GuangYou;WANG HongJun
近年来，我国海相碳酸盐岩发现了一些大型油气田，特别是深层油气藏取得重大发现，展现了良好的勘探前景。塔中地区是塔里木盆地的一级构造单元，良里塔格组奥陶系灰岩礁滩杂岩蕴藏着近万亿立方米天然气资源。该油藏为陆架边缘礁滩杂体，具有超低孔、低渗透、非均质性强等特点，目前埋深4 500～6 500 m。研究发现，良里塔格组深层储层的形成和分布不仅受早期高能沉积相和腐蚀的控制，而且喜马拉雅期以来强烈的气体充注过程形成的裂缝网络，对优化和改善储层物性发挥了重要作用。探讨了奥陶系深层碳酸盐岩储层后期强烈充注与储层能力提高的关系，并建立了相应的机制和模式，有利于优势勘探目标的预测与评价。
Some large-scale oil-gas fields have recently been discovered in marine carbonate in China, especially the significant discoveries in deep reservoir that reveals a favorable exploration prospect. Tazhong area is the first-order tectonic unit in Tarim Basin, where there are nearly trillion cubic meters of natural gas resources in the Ordovician limestone reef flat complex in Lianglitage Formation. The reservoir is shelf edge reef flat complex, characterized by ultra-low porosity, low permeability and strong heterogeneous, with a current burial depth of 4500–6500 m. Studies find that the formation and distribution of deep reservoir of the Lianglitage Formation were controlled not only by the early high-energy sedimentary facies and corrosion, but the fracture network formed by the strong gas-charging process since the Himalayan epoch, which played an important role in optimizing and improving reservoir properties. This paper discusses the relationship between the strong later gas-charging and the improvement of the reservoir capacity in deep Ordovician carbonate reservoir, and also builts the corresponding mechanisms and modes, which is favorable for the prediction and evaluation of the advantageous exploration targets.
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