哈萨克斯坦扎纳诺尔油田石炭系碳酸盐岩浅滩沉积模式及储层质量差异机理

发布时间：2018-04-09 18:55

  本文选题：扎纳诺尔　切入点：石炭系　出处：《石油学报》2016年07期

【摘要】：浅滩储层不同部位的储集物性差异明显。对哈萨克斯坦扎纳诺尔油田石炭系浅滩储层的研究表明,沉积相是导致该类储层物性差异的主要原因。滨岸环境包括4个波浪带,表现出不同的水动力特征:1涨浪带,海底低于正常浪基面,波浪对海底没有明显作用;2升浪带,海底高于正常浪基面,同时水深超过2倍波高,海底沉积物受到轻微扰动;3破浪带,水深介于1倍和2倍波高,海底沉积物受到持续扰动;4涌浪-冲浪带,水深小于1倍波高,波浪破碎,海底沉积物剧烈震荡。波浪带控制了沉积物特征,据此将浅滩分为3个亚相:1间歇高能滩,主要沉积灰泥颗粒石灰岩,储集物性差,电测曲线表现出低声波、高电阻和高伽马特征;2破浪-升浪滩,主要沉积亮晶有孔虫-蜓石灰岩,储集物性好,电测曲线表现出高声波、低电阻和低伽马特征;3涌浪-冲浪滩,主要沉积亮晶鲕粒石灰岩,储集物性差,电测曲线表现出低声波、高电阻和低伽马特征。由海向陆方向,随着水深逐渐减小、水体循环减慢以及盐度增加,胶结作用的速度和强度出现显著差异,导致不同亚相沉积物的原始孔隙及次生孔隙的发育明显不同。因此,沉积相是控制该区储层质量的主要因素。
[Abstract]:The reservoir physical properties of different parts of shoal reservoir are obviously different.The study of Carboniferous shoal reservoir in Zananor Oilfield of Kazakhstan shows that sedimentary facies are the main reason for the difference of physical properties of this kind of reservoir.The coastal environment consists of four wave zones, showing different hydrodynamic characteristics: 1 rising wave zone, which is below the normal wave base, and the wave has no obvious effect on the bottom of the sea, which is above the normal wave base, and the water depth is more than 2 times higher than that of the normal wave base.The wave zone controls the characteristics of the sediments, according to which the shoals are divided into three sub-facies: 1 intermittent high energy beaches, the main sedimentary plaster grained limestone, poor reservoir physical properties, the electrical measurement curve shows a low voice wave, high electrical resistance and high gamma characteristics / 2 break-wave-Shenglang beach.The main sedimentary bright crystal foraminifera-fly limestone has good reservoir properties. The electric measurement curves show high sound wave, low electrical resistance and low gamma content. The main deposits are bright grain oolitic limestone, and the reservoir properties are poor, the characteristics of which are high sound wave, low resistivity and low gamma content.The electrical measurement curve shows the characteristics of low wave, high resistance and low gamma.In the direction of sea to land, with the decrease of water depth, the circulation of water body slows down and the salinity increases, and the rate and intensity of cementation show significant difference, which leads to the obvious difference in the development of primary and secondary pores in different subfacies sediments.Therefore, sedimentary facies are the main factors controlling reservoir quality in this area.
【作者单位】： 中国石油大学地球科学学院;
【分类号】：TE122.14
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本文编号：1727705