摘要
柴达木盆地风西地区属于新生代咸化湖盆滨浅湖沉积的混积碳酸盐岩油藏,储层岩石矿物多样,孔隙结构复杂,非均质性强,传统储层流体识别方法和参数计算方法在该地区适用性较差,影响了油田开发进程。因此,通过深度分析影响流体识别测井敏感参数,结合X衍射和薄片等实验分析、常规测井、岩性扫描和核磁测井特殊测井资料,形成消除岩性影响和孔隙结构影响的流体识别方法。提出考虑混积碳酸盐岩岩性的孔隙度分量计算模型,利用岩心渗透率和核磁可动孔隙度建立了渗透率计算模型,形成了分岩性、变岩电参数的改进阿尔奇饱和度计算模型。将研究成果应用于风西地区混积碳酸盐岩储层流体识别和储层参数评价中,测井解释符合率高,且应用效果较好,可在其它混积碳酸盐岩储层推广使用。
Fengxi area of Qaidam Basin belongs to mixed carbonate reservoirs deposited in Cenozoic saline lacustrine basins and shallow lacustrine.The reservoir rocks have diverse minerals,complex pore structures and strong heterogeneity.Traditional reservoir fluid identification and parameter calculation methods have poor applicability in this area,which affects the oilfield development process.Therefore,through deep analysis of the sensitive parameters affecting fluid identification logging,combined with experimental analysis such as X-ray diffraction and thin sections,conventional logging,lithology scanning,and special logging data from nuclear magnetic resonance logging,a fluid identification method is established to eliminate the effect of lithology and pore structure.A porosity component calculation model considering the lithology of mixed carbonate rock was proposed,a permeability calculation model was established by using core permeability and nuclear magnetic movable porosity,and an improved Archie saturation calculation model based on lithology and variable rock electrical parameters was formed.The research results have been applied to fluid identification and reservoir parameter evaluation of mixed carbonate rock reservoirs in Fengxi area,with high coincidence rate of logging interpretation and a good application effect,which can be popularized in other mixed carbonate rock reservoirs.
作者
史亚红
陈文安
李纲
刘国良
王青川
郭正权
SHI Yahong;CHEN Wen’an;LI Gang;LIU Guoliang;WANG Qingchuan;GUO Zhengquan(Exploration&Development Research Institute of Qinghai Oilfield Company,PetroChina,Dunhuang 736202,Qinghai,China)
出处
《石油地质与工程》
CAS
2023年第5期10-16,共7页
Petroleum Geology and Engineering
基金
中国石油科技重大专项(2016E-0108GF)
国家自然科学基金(41872133)联合资助
关键词
柴达木盆地
混积碳酸盐岩储层
核磁测井
流体识别
储层参数评价
Qaidam Basin
mixed carbonate reservoir
nuclear magnetic logging
fluid identification
reservoir parameter evaluation
