水淹层测井识别方法研究及效果验证

Identification and evaluation of water flooded zones with logging data and its application

贺顺义 谢楠 彭洪波 张成学

He Shunyi Xie Nan Peng Hongbo Zhang Chengxue

中国地质大学(北京), 北京 100083; 中海石油研究中心, 北京 100027; 中国石油大港油田公司, 天津 300280

China University of Geoscience (Beijing), Beijing 100083; CNOOC Research Center, Beijing 100027; Dagang Oilfield Co., PetroChina, Tianjin 300280

油田在长期注水开发过程中,不仅储层孔隙空间结构发生变化,而且储层含油饱和度也发生了变化,形成了水淹层。水淹层的测井解释是油田开发的一个难题,经研究分析表明,油层水淹前后的测井响应特征不同,且从宏观沉积特征看,不同的沉积微相类型,其储层物性在水淹前后变化量也不同。据此,可以通过单井常规测井资料解释,或通过一些特殊测井资料与常规测井资料的综合分析来解释和识别水淹层,并依据对子井测井曲线特征研究、生产动态资料研究、密闭取心资料分析、沉积微相划分及多井综合评价等一系列技术对解释结果进行有效性验证,从而找到水淹层电性特征与含油饱和度及沉积特征的关系,达到准确解释水淹层的目的。

During long term water injection period, both the pore texture and oil saturation of reservoir have changed, resulting in the development of water flooded layers.It is a difficult matter to conduct interpretation of water flooded layer with logging data during oil field development.According to analysis of this study, log responses are quite different before and after oil layer been water flooded.In addition, for different sedimentary microfacies, their physical properties of reservoir before and after water flooding are also quite different.Therefore, water flooded layers can be identified by conventional log analysis or by multidisciplinary analysis with conventional and special log data.For the interpretation results, validity check can be carried out by a series of method such as log characters comparison of adjacent-wells, production performance data study, sealed coring data analysis, sedimentary microfacies division and multiwell comprehensive evaluation and so on.

https://doi.org/10.3969/j.issn.1008-2336.2010.02.091