摘要
利用区域地质、测井、砂岩薄片、铸体薄片、扫描电镜、X衍射分析等多种方法对鄂尔多斯盆地韩渠—张天渠地区长2油层沉积相和储层特征进行了综合分析研究。结果表明:该区长2时期发育三角洲平原沉积体系,广泛发育的分流河道砂体储集层为油气的聚集提供了有利场所,分流河道储层空间以原生粒间孔为主,孔隙度一般为15%左右,渗透率一般为5×10-3μm2左右,属低孔低渗型储层。本区构造运动微弱,长2为构造-岩性油藏,分流河道砂体与长1沉积的泥岩盖层配置以及上倾方向分流间洼地的岩性遮挡是油气在长2砂体中富集的主要控制因素。
According to the comprehensive analysis of the regional geology, logging, sandstone thin section, casting lamella, scan electronmicroscope,X- ray diffractions and other means, the sedimentary facies and reservoir features of Chang 2 Formation in Hanqu - Zhangtianqu region of Ordos basin have been studied. The results show that the sand bodies of the Chang 2 oil reservoir are mainly deltaic plain deposits,and the distributary channel sand bodies in Chang 2 Formation are the advantageous places for etroleum accumulation of this area. The main porosity type of reservoir is primary interparticle pore. The porosity and permeability of reservoir are about 15 % and 5 ×10^-3μm^2 separately, which belong to low porosity and low permeability reservoir. Located in the flat Shanbei slope with weak tectonic activities, Chang 2 oil pool belongs to the tectonic -lithologic pool. Channel sand bodies,lithologic lateral bareier and the shale cap rock of Chang 1 Group are the main dominant factors for the petroleum accumulation in Chang 2 sand bodies.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2010年第1期38-47,共10页
Journal of Jilin University：Earth Science Edition
基金
'十一.五'国家科技支撑计划(2007BAB1701)
国家'973'项目(2003CB214605)
