摘要
滨岸相砂岩储层发育薄层隔夹层,由于测井垂向分辨率和薄层效应的影响,用于识别不同类型隔夹层的关键测井参数的数值范围部分重合,使常用测井识别方法面临困难。针对这一问题,本研究在多口井岩心观察描述的基础上,基于常规测井资料、岩心实验分析资料,创新性采用"三端员定型"法识别三类隔夹层:钙质隔夹层、泥灰质隔夹层和泥质隔夹层。不同类型隔夹层在图版上不仅能有效区分,同时还能反映出钙质含量、泥质含量变化对隔夹层物性的影响。依据隔夹层识别结果,将研究区隔夹层垂向上分为4种接触关系:单一型、渐变型、突变型和多峰型;平面上分为4种分布模式:片状大面积分布型、突变接触型、渐变接触型和随机分布型,明确了隔夹层的发育特征。研究认为,垂直渗透率与钙质含量具有正相关性,与泥质含量相关性差;应用产量控制系数C(与隔夹层厚度和垂直渗透率相关)论证了具有一定厚度的隔夹层对产量的控制能力按泥质隔夹层、泥灰质隔夹层、钙质隔夹层顺序依次增强,因此钙质隔夹层在研究区对油水垂向运动的影响最大。研究成果对滨岸相砂岩储层油田开发后期剩余油挖潜及制订开发调整方案具有重要意义。
The sandstone reservior in littoral facies develops thin interlayers. The traditional identification methods of conventional log had faced difficulties because the range of values of key logging parameters which were used to identify different types of interlayers overlapped in part due to vertical resolution of fog and thin- layer effect. In this paper, based on the core description, combined with the analysis of conventional logging curves and tested data, a new method named three-end-mumber diagram of classification was first applied to identify three types of interlayers such as calcareous interlayer, marlaceous interlayer and muddy interlayer in Carboniferous Donghe sandstone, Hade Oil Field. The plate can not only be used to distinguish different types of the interlayers effectively, but also reflect the changes of the physical properties of the interlayers affected by calcareous and argillaceous content changes. The results indicate that the interlayers have four-kind contact models in vertical.. ＂unitary＂ type, ＂gradual＂ type, ＂abrupt＂ type and ＂multi-peek＂ type. Moreover, the interlayers have four-kind distribution patterns in plane~ ＂large area of flake＂ type, ＂abrupt contact＂ type, ＂gradual contact＂ type and ＂random distribution＂ type. It is positively related between vertical permeability and calcareous content of the interlayers, but for argillaceous content it is poor. The variable characteristics of production control coefficient （C） demonstrate that the interlayers with a certain thickness have a gradually enhanced ability to affect oil production in order of muddy interlayers, marlaceous interlayers and calcareous interlayers. Therefore, the impact of calcareous interlayers on the vertical movement of oil and water in the area is the largest. The results are significant for studying the remaining oil distribution and adjusting the development plan in the later period of sandstone reservoir in littoral facies.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2017年第5期328-338,共11页
Earth Science Frontiers
基金
国家自然科学基金项目(41372139
41072098)
国家科技重大专项专题(2016ZX05046-003-001
2011ZX05018-001-002
2011ZX05033-004)
关键词
滨岸相
隔夹层
“三端员定型”法
垂直渗透率
产量控制系数
littoral facies
interlayer
three-end-mumber diagram of classification
vertical permeability
pro-duction control coefficient
