塔河油田6～7区孔洞型碳酸盐岩储层建模

3D Modeling of Vug Carbonate Reservoir in the Sixth—Seventh Blocks of Tahe Oilfield,Tarim Basin

塔河油田6～7区奥陶系碳酸盐岩储层受岩溶作用影响,非均质性极强.因此,准确地刻画储集体的形态及三维空间展布对油气田的勘探开发至关重要.在对研究区奥陶系缝洞型碳酸盐岩储层纵向发育规律的认识的基础上,首次提出采用“多点统计学”进行储集相建模的基本思路.根据地震属性与孔洞型储层之间的对应关系优选“特征属性”,建立基于“特征属性”的“训练图像”;以钻井、地震识别以及测井解释成果作为硬数据,地震波阻抗的溶洞发育概率体作为软数据,进行“储集相”模拟.结果表明：该方法不仅实现了对孔洞型储集体形态的模拟,而且再现了孔洞型储集体的复杂结构及空间分布,同时模拟结果与该类型储集体的纵向发育规律相符.

The carbonate reservoir of Ordovician in the sixth-seventh blocks of the Tahe Oilfield is a kind of special reservoir,which is affected by the karstification,and having strong heterogeneity.Consequently,it is important to depict the shape and 3D distribution of this reservoir for the oil and gas field exploration and development.The method of ＂multipoint geostatistics＂ was first proposed for sixth-seventh blocks in the Tahe Oilfield from the point of vug reservoir development rule and mode in the vertical,and on the basis of the special corresponding relationship between vug reservoir and seismic attributes.According to the corresponding relationship between vug reservoir and seismic attributes,the training image was built base on the special attribute.Taking drilling,seismic and well logging interpretation as hard date,and using the cave development probability cube from seismic wave impedance as software date to restrain the interwell.The result shows that the method not only can display the shape of vug reservoir,but also reproduce the complex structure and spatial distribution of the reservoir,and the simulation results has consistence with the reservoir development rule in the vertical.