摘要
在东营凹陷北带近岸水下扇砂砾岩有效储层物性下限计算的基础上,以孔隙度差值和渗透率差值为评价参数,分析了盐家—永北地区、胜坨地区、利津地区沙四段上亚段2800～3500m近岸水下扇砂砾岩储集物性的差异。结果表明:胜坨地区沙四段上亚段2800～3500m近岸水下扇扇中辫状水道砂砾岩储集物性最好,盐家—永北地区次之,利津地区最差;盐家—永北地区沙四段上亚段2800～3500m近岸水下扇扇中辫状水道含砾砂岩储集物性最好,胜坨地区次之,利津地区最差。通过对古地貌、沉积特征、地层压力和成岩作用等有效储层控制因素对比分析发现,沉积古地貌和物源特征控制了东营凹陷北带沙四段上亚段不同地区近岸水下扇砂砾岩储集物性的差异性。
Based on the calculation of sand-conglomerate petrophysical property cutoffs in the northbelt of Dongying depression,and taking porosity difference and permeability difference as the evaluation parameters,the sand-conglomerate physical property differences of the nearshore subaqueous fan at depth of 2 800-3 500m in the upper part of the fourth member of the Shahejie Formation(upper Es4) of Yanjia-Yongbei area,Shengtuo area and Lijin area have been analyzed herein.The results show that the sand-conglomerate physical property of the braided channel of middle-fan at depth of 2 800-3 500m of upper Es4 in Shengtuo area is better than that of Yanjia-Yongbei area,meanwhile Yanjia-Yongbei′s is better than that of Lijin area;and pebbled sandstone physical property of the braided channel of middle-fan at depth of 2 800-3 500m in upper Es4 of Yanjia-Yongbei area is better than that of Shengtuo area,meanwhile Shengtuo′s is better than that of Lijin area.Through the comparison of effective reservoir controlling factors,such as palaeogeomorphology of sedimentation,sedimentary characteristics,reservoir pressure,diagenetic characteristics,and so on,it is presented that differences of sand-conglomerate physical property of nearshore subaqueous fan of upper Es4 in different areas in the north zone of Dongying depression are mainly controlled by palaeogeomorphology of sedimentation and sedimentary sources characteristics.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第4期9-12,共4页
Petroleum Geology and Recovery Efficiency
基金
国家油气重大专项"东营凹陷沙河街组碎屑岩储层纵向演化及其量化表征研究"(2008ZX05051-02)
国家自然科学基金项目"东营凹陷古近系中深层孔隙度高值带成因机制及其量化预测研究"(40972080)
教育部新世纪优秀人才支持计划(NCET-06-0604)
中国石油大学(华东)优秀博士论文培育项目
关键词
近岸水下扇
砂砾岩
物性下限
孔隙度差值
渗透率差值
沙四段上亚段
东营凹陷
nearshore subaqueous fan
sand-conglomerate
petrophysical property cutoffs
porosity difference
permeability difference
Dongying depression
