涠洲XX油田J2Ⅱ油组测井资料非均质储层隔夹层精细研究

Fine Study on the Inter-layer in Heterogenetic J2Ⅱ Oil Series in Weizhou XX Oilfield by Logging Data

夏竹君 张贺举 高弘毅 程宝庆 杨坚

XIA Zhujun ZHANG Heju GAO Hongyi CHENG Baoqing YANG Jian

中海油能源发展股份有限公司工程技术湛江分公司, 广东湛江 524057

Engineering and Technology Company Zhanjiang Branch, CNOOC Energy Technology & Service Limited, Zhanjiang 524057, China

涠洲XX油田开发层位为J2Ⅱ油组，岩心及测井资料显示J2Ⅱ油组隔夹层局部发育，由于资料较少，展布范围不确定，无法进一步研究隔夹层对含水上升速度的影响。利用岩心和测井资料对该油藏隔夹层进行研究，把隔夹层分为泥质隔夹层和钙质隔夹层，确定了隔夹层的识别方法及计算模型；建立了隔夹层渗透性精细划分标准，将隔夹层划分为中—高渗透性、低渗透性、特低渗性三类；通过精细刻画J2Ⅱ油组隔夹层在平面上的展布，为重新建立该油藏的精细地质模型提供了关键资料，也为后期油藏数值模拟研究含水上升规律奠定了基础。

J2Ⅱ (ZhujiangⅡ)oil series is the objective pay zone in Weizhou XX oilfield. The core and logging data show that there are some inter-layers developed in the J2Ⅱ oil series.It is unable to further study the effect of the inter-layer on the rising velocity of water-cutting due to the limitation of relevant data and the uncertainty of the distribution range of inter-layer. Based on the core and well logging data,the authors conducted a fine study on the inter-layer through dividing the inter-layer into argillaceous inter-layer and calcareous inter-layer, determining the identification method and calculation model of inter-layer, and establishing the criteria of inter-layer classification by permeability.It can be divided into three levels by three grades of permeability,namely medium-high permeability, low permeability and extra-low permeability. The fine depiction of inter-layers in J2Ⅱ oil series provided key information for re-establishing the fine geological model, and also laid a foundation for the subsequent reservoir numerical simulation study of water-cutting rising.

https://doi.org/10.3969/j.issn.1008-2336.2017.04.053