塔河油田三叠系水淹层测井响应特征及识别

Logging response characteristics and identification of Triassic water flooding formation in Tahe oilfield

程兰 王晨光 周威

Cheng Lan Wang Chenguang Zhou Wei

中国石化 西北油田分公司 勘探开发研究院, 乌鲁木齐 830011

Research Institute of Exploration & Production, SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China

近年来，塔河油田9区的开发实践表明，该区三叠系下油组存在不同程度水淹。目前该区还没有形成成熟的水淹层测井解释评价方法。区块岩心水驱实验表明，水淹后油层电阻率呈单调下降特征，储层的岩性、物性、孔隙结构及粒度均变化较小。在研究水驱实验成果的基础上，通过研究9区三叠系下油组油层水淹后储集层性质的变化，总结水淹层测井响应特征，形成以重建原始电阻率法为主、以电阻率-孔隙度交会图法、高分辨率感应电阻率比值法为辅的一套水淹层识别方法，与测试结果匹配较好。

In recent years, the development practice of Tahe 9 area showed that there are different degrees of water flooding in the Triassic lower oil formation. However, there is no mature well logging interpretation and evaluation method for water flooding layer in this area. Core water flooding test showed that reservoir resistivity declined after flooding, and the lithology, physical property, pore structure and grain size of reservoir changed little. The physical property changes of the Triassic lower oil formation in Tahe 9 area after water flooding were studied, and the logging responses of water flooded layer were concluded. An identification method for water flooded layer was established, which mainly focused on reconstructing original resistivity and combined with resistivity-porosity cross plots and high-resolution induction resistivity ratio.

https://doi.org/10.11781/sysydz2017S1017