鄂西渝东石柱复向斜上三叠统须家河组储层预测

Upper Triassic Xujiahe Formation reservoir prediction on Shizhu synclinorium in the area of western Hubei and eastern Chongqing.

由于四川盆地上三叠统须家河组发现了多处含油气构造,因此处于四川盆地东缘的鄂西渝东石柱复向斜的须家河组储层受到关注。本文首先对须家河组的沉积特征和储层特征进行了分析与描述,然后阐述了储层预测:①采用地层模型正演,获取储层的地震响应;②分析地震相,并采用人工神经网络进行波形分类,划分地震相;③解释地震相,将不同层段的地震相转为沉积相,同时利用波阻抗反演技术,求得了储层分布和厚度。以上预测结果已得到实钻井的验证。

As several oil-bearing structures were found out in Upper Triassic Xujiahe Formation in Sichuan basin, the reservoir prediction in Upper Triassic Xujiahe Formation on Shizhu synclinorium in the area of western Hubei and eastern Chongqing was implemented. At first the sedimentary characteristics and reservoir characteristics of Xujiahe Formation were analyzed and described, and then reservoir prediction was elaborated and implemented as below: (1)conducting stratum forward modeling and obtaining seismic response; (2)analyzing seismic facies, applying artificial neural networks to classify waveforms, then dividing seismic facies; (3)interpreting seismic facies, converting seismic facies in different intervals into sedimentary facies, at the same time applying wave impedance inversion technology, at last distribution and thickness of the reservoir were identified and the reservoir was proven by drilling, it is demonstrated that the reservoir prediction above is effective and applicable.