摘要
应用压汞测试、核磁共振、物性分析及生产动态等多种资料,对吐哈盆地巴喀气田八道湾组致密砂岩储层的岩石学特征、物性特征、孔隙结构特征进行了分析。综合孔隙度-渗透率交会图法、试气资料分析法、孔隙结构分类法和核磁共振法对八道湾组储层物性下限进行评价,确定其孔隙度下限值为4.5%,渗透率下限为（0.03--0.04）×10-3μm2。对巴喀气田沉积相类型进行了研究,明确了辫状河三角洲平原及前缘为有效储层分布的有利相带。巴喀气田有效储层分布规律主要受构造位置的高低、砂岩粒度的粗细、裂缝的发育程度三个因素共同控制：构造位置的高低对研究区的有效储层有重要的控制作用,目前钻井解释的有效储层主要分布在构造高部位;研究区的有效储层主要分布于粒度较粗的砂岩段中,随着砂岩粒度的增加,孔隙度和渗透率明显变好,物性的变好为有效储层的形成奠定了基础;研究区裂缝较为发育,随着裂缝密度的增加,储层的有效程度也随之增加。
Based on the mercury penetration measurements, the nuclear magnetic resonance and production per- formance data, the petrologic features, the controlling factors of porosity and permeability, the pore structure fea- tures,were analyzed in Badaowan Formation in Baka gas field. Through the porosity-permeability crossplot, the gas test analysis, the porosity structure classification method and the nuclear magnetic resonance method, the reservoir lower limit is analyzed and the porosity lower limit is 4.5 % and the permeability lower limit is between （0.03 0.04） x 10-3 la,m2. And then, the sedimentary face types in Baka gas field is carried on, and the delta plain and front are the advantageous zones of effective reservoir. Effective reservoir distribution is mainly affected by tectonic position＇s height, sandstone grain-size and fracture development： firstly, tectonic position plays an important con- trolling role to the effective reservoir distribution and according to present drilling interpretation the effective reser- voir is mainly distributed in the high position of structure; secondly, the effective reservoir is mainly distributed in coarse sandstone and with the increase of grain-size, porosity and permeability is becoming significantly better and lays the groundwork for effective reservoir; lastly, fractures are developed in the study area, so the reservoir effec- tiveness is also increased with the fracture density.
出处
《科学技术与工程》
北大核心
2015年第25期108-114,共7页
Science Technology and Engineering
基金
中国石油天然气股份有限公司专项项目(2010E-23)资助
关键词
吐哈盆地
巴喀气田
致密砂岩
物性下限
有效储层分布规律
Turpan-Hami Basin Baka Gas Field tight sandstone reservoir lower limit effectivereservoir distribution
