摘要
为分析明确火山岩储层孔隙结构发育特征,为气田有效开发提供参考。利用63块岩心观察和薄片资料以及206块样品分析测试资料对松辽盆地徐东地区营城组一段火山岩储层孔隙结构特征进行了统计分析和聚类评价。研究结果表明:研究区目的层属中低孔低渗储层,不同火山岩性孔隙结构差异大、非均质性强。孔隙度、渗透率和孔喉半径中值这3个参数为孔隙结构聚类评价的最佳指标,孔隙结构可以划分为Ⅰ,Ⅱ,Ⅲ和Ⅳ4类,以Ⅲ和Ⅳ类为主。孔喉分布不均,不同区域和不同层位差异较大,整体上喉道连通性较差。平面上主力层YC1I1小层中,Ⅰ类和Ⅱ类孔隙结构主要发育在研究区中部偏西部以及中部偏东北部的区域。
In order to make sense of development characteristics of volcanic reservoir and to help empolder volcanic reservoir effectively, pore structure characteristics of volcanic reservoir of the Memberl of Yingcheng Formation in Xudong Area in Xushen Gas Field were studied. 63 cores data and 206 analyzing-testing data were used. The results indicated that the reservoir in study area was middling-low in pore and permeability, and permeability was higher in some areas because of fractures developed. Physical properties and pore structures were different in different lithologies. And heterogeneity of pores strongly developed. Pore and permeability and pore median radius were best parameters to evaluate pore structure. Pore structure could be carved up into four types of I, II, III and IV. And type II and type III took the leading roles. Pores and throats distributed inhomogeneously, and they were different in different areas or layers. As a whole, the connectivity of throats was poor. Type I and type II of pore structure mainly developed in the areas of west and northeast of the central section in the dominating layer of YClI1 in plane.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第4期1453-1463,共11页
Journal of Central South University:Science and Technology
基金
国家科技重大专项项目(2008ZX05016)
中国博士后科学基金面上基金资助项目(20100480344)
中国石油勘探开发研究院中青年创新基金(2009-B-10-03)
关键词
徐东地区
营城组
火山岩储层
孔隙结构
气田开发
Xudong Area
Yingcheng Formation
volcanic reservoir
pore structure
gas field development
