摘要
针对目前火山岩储层非均质性研究薄弱的现状,以松辽盆地徐东地区白垩系营城组一段火山岩储层为例,通过对56块岩心分析、275块物性分析和32口井精细测井解释资料进行统计分析和数学运算,定量研究火山岩储层层内非均质性特征及层内非均质性的成因和影响因素,探讨了层内非均质性对储层开发的影响.提出了将岩心分析和测井解释成果统计计算相结合研究火山岩储层层内非均质性的方法.结果表明:研究区目的层层内非均质性总体强烈,4个小层YC1I1,YC1I2,YC1II1和YC1II2中,小层YC1I1的非均质性最弱,为主力层,其在垂向上渗透率基本达到横向上的1/2到1倍多.总体上,储层渗透率在横向上的变化要远大于垂向上.储层层内非均质性的影响因素包括构造作用、火山喷发特征、火山岩性、火山岩相及成岩作用等多种,以构造作用和成岩作用为主.以渗透率变异系数为指标,油层发育区以该项系数小于0.5最多,0.5至0.7之间次之.储层层内非均质性强烈的区域主要分布于研究区西北部和东南部,在开发方案的设计过程中应该充分考虑.
Due to few researches on volcanic reservoir heterogeneity, and in order to deeply un- derstand the structural characteristics of reservoir in micro-scale and provide reference to the effective exploitation of volcanic reservoir, the characteristics of inter layer heterogeneity of volcanic reservoir were quantitatively studied. one member of Yingcheng cretaceous formation In this research, the volcanic gas reservoir of in Xudong area, Xushen gas field was taken as an example. At the same time, the genesis and impact factor of inter layer heterogeneity of vol- canic reservoir and its influence to the reservoir development are also discussed. In this process, 56 core analysis data and 275 statistics of samples of reservoir properties were ana- lyzed, and 32 well log interpretation data were used. Methods of geological statistics and arith- metical operation means were used. The methods of core analyses combined with methods of well logging results statistics used to study the characteristics of inter layers heterogeneity of volcanic reservoir are presented. The results show that the inter layer heterogeneity of studied horizon volcanic reservoir in the aimed area was the strongest in terms of mass, whereas the in- ter layer heterogeneity of the YCII1 single layer, which was the leading layer, was the weakest among the four layers with a vertical permeability of more than half the cross range permeabili- ty. As a whole, variations of reservoir permeability in cross range were far bigger than those in vertical direction. The impact factors of inter layer heterogeneity of volcanic reservoir include the structural functioning, volcanic eruption characteristics, volcanic lithology, volcanic litho- facies and diagenesis, where the structural functioning and diagenesis took the dominant roles. Taking the variation coefficient of permeability as an index, the reservoir development condi- tions were researched. The results show that the reservoir development often occurred in the areas where the variation coefficient of permeability was smaller than 0.5. Then in areas where the permeability variation coefficients were between 0.5 and 0.7, reservoir development took the second role. All the strong inter layer heterogeneity of volcanic reservoir mainly distributed in the northwest and southeast of the study area, should be fully considered while designing and developing the process.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2012年第4期641-649,685,共10页
Journal of China University of Mining & Technology
基金
国家科技重大专项(2008ZX05016-001)
中国博士后科学基金项目(20100480344)
中国石油勘探开发研究院中青年创新基金项目(2009-B-10-03)资助
关键词
储层开发
非均质性
火山岩储层
营城组
徐东地区
reservoir development
heterogeneity
volcanic reservoir
Yingcheng formation
Xudong area
