塔河12区缝洞型储层预测及建模技术探讨

Prediction and modeling of fractured-vuggy reservoir in block no. 12 of Tahe Oilfield

海涛 钱真 郭忠良

Hai Tao Qian Zhen Guo Zhongliang

中国石油化工股份有限公司 西北油田分公司 塔河采油二厂,新疆 轮台 841604

Tahe No. 2 Oil Production Plant, SINOPEC Northwest Oilfield Company, Luntai, Xingjiang 841604, China

塔河油田12区奥陶系缝洞型碳酸盐岩油藏因具有埋藏深、储层发育不规则溶洞及裂缝、非均质性强等特征，储层预测难度大。为了反映缝洞型储层分布，以区内地震资料为基础，开展地震振幅变化率、本征值相干、趋势面差异分析，并采用地震测井联合反演等技术对塔河12区的缝洞型储集体进行了预测。综合预测结果表明，12区整体缝洞型储集体较发育，但北部发育程度比南部略差，串珠状强振幅地震反射较发育，其结果与缝洞体钻遇情况较吻合。同时，以波阻抗反演和精细相干分析模型为基础，提出利用聚类分析技术建立缝洞型储层地质模型的思路。

In block no. 12 of the Tahe Oilfield, the fractured-vuggy reservoirs in Ordovician are featured by deep depth, irregular caves and fractures development and strong heterogeneity, making reservoir prediction difficult. Based on seismic data, the analyses of the variance ratio of seismic amplitude, eigenvalue coherence and trend surface difference are carried out to show the distribution of fractured-vuggy reservoir. Moreover, the inversion technique of seismic well logging is applied to predict the fractured-vuggy reservoirs in block no. 12 of the Tahe Oilfield. The results show that fractured-vuggy reservoirs are widespread in the study area, but worse in the north than the south. Beaded high-amplitude seismic reflections are well-developed, proved by drilling. Based on impedance inversion and fine-coherence analysis models, an idea of modeling fractured-vuggy reservoir by clustering procedure is proposed.

https://doi.org/10.11781/sysydz2013S1052