基于测录井资料的致密油藏流体识别方法研究  

Research on Fluid Identification Method Based onLogging Data in Tight Oil Reservoirs

作　　者：袁龙 吴思仪 罗少成 曹原 林伟川 张晶宇 Yuan Long;Wu Siyi;Luo Shaocheng;Cao Yuan;Lin Weichuan;Zhang Jingyu(Institute of Geology,China National Logging Corporation,Xi’an Shaanxi 710021,China;Changqing Branch,China National Logging Corporation,Xi’an Shaanxi 710021,China)

机构地区：[1]中国石油集团测井有限公司地质研究院,陕西西安710021 [2]中国石油集团测井有限公司长庆分公司,陕西西安710021

出　　处：《工程地球物理学报》2023年第2期205-213,共9页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金(编号:41202110);西南石油大学校级科技基金(编号:2012XJZ004)。

摘　　要：苏北盆地中部致密砂岩储层属于典型的非常规致密油气藏。相比常规油藏类型特征,致密砂岩油藏储层物性差、孔隙结构复杂、常规测井曲线识别流体特征不明显。为了解决流体识别难题,本文基于测录井资料对致密油藏的流体识别方法进行综合研究。研究结果表明:录井资料能够提供反映地层真实流体特征的气测、地化及定量荧光等信息,是致密砂岩储层流体识别评价的直接手段;引入对流体敏感的录井参数,优选能反映储层含油性的录井参数,如总烃含量、烃类灌满系数、全烃相对幅度、油性指数及含油浓度等,结合测井资料对流体性质识别,能更为准确地提高解释符合率;通过对苏北盆地QX3井进行实际处理解释,结合测试结论来证明基于测井资料下的能量系数图版法和地化录井识别方法对致密储层流体识别是有效可行的。The tight sandstone reservoirs in the central Subei Basin are typical unconventional tight oil and gas reservoirs.Compared with the characteristics of conventional reservoir types,tight sandstone reservoirs have poor physical properties,complex pore structure,and inconspicuous fluid characteristics identified by conventional logging curves.In order to solve the problem of fluid identification,this paper comprehensively studies the identification method of oil and water layers in tight sandstone reservoirs based on logging data.The research results show that the mud logging data can provide such information as gas logging,geochemical and quantitative fluorescence that reflect the real fluid characteristics of the formation,and it is a direct means of identifying and evaluating the fluid in tight sandstone reservoirs.The logging parameters sensitive to fluid are introduced,and varied logging parameters reflecting the oil-bearing property of the reservoir are optimized,such as total hydrocarbon content,hydrocarbon filling factor,relative amplitude of total hydrocarbon,oiliness index and oil concentration.Combined with logging data,the fluid properties are identified to improve character identification and interpretation coincidence rate.Through the actual processing and interpretation of well QX3 in the Subei Basin,combined with the test results,it is proved that the energy coefficient chart method and geochemical logging identification method based on logging data are effective and feasible for fluid identification in tight reservoirs.

关 键 词：致密砂岩油藏 录井参数 灌满系数 油性指数 流体识别 

分 类 号：P631.8[天文地球—地质矿产勘探]