塔河油田碳酸盐岩储层预测技术与应用

塔河油田的主体为奥陶系碳酸盐岩缝洞型油藏，主要储层类型为缝洞型储层，储集体受岩溶、裂缝控制，形态复杂，纵横向非均质性强，埋藏深（超过5 300 m），地震反射信号弱，其勘探开发难度很大。近几年来，西北分公司综合利用地质、地震、钻井及测井等资料，通过模型正演，建立了碳酸盐岩储层的地震识别模式,形成了一套以地震参数提取、振幅变化率计算、相干体分析、波阻抗反演及波形分析等技术为主的、适合于塔河油田储层预测的技术方法系列。该套技术方法为塔河油田探井、评价井、开发井的部署论证，储量计算，油田开发方案的编制，提供了可靠的地质科学依据，提高了钻井成功率。

Carbonate reservoir prediction technology and its application in Tahe Oilfield

The main part of Tahe oilfield is the Ordovician carbonate reservoir, and its main reservoir space is cavern and fracture. The reservoir is of complex geometry and strong heterogeneity in both vertical and horizontal direction due to karstification and fracturing, and buried deeply with depth of more than 5300m. Seismic reflections are weak, leading to great difficulty in exploration and development With integrated utilization of geology, seismic, drilling, and logging data, SINOPEC Northwest Company established seismic patterns of carbonate reservoir through forward modeling, and developed a suite of techniques for reservoir prediction. The techniques mainly consisted of extraction of seismic parameters, calculation of amplitude variability, coherence cube analysis, impedance inversion, and waveform analysis. These techniques have been used in deployment of exploratory well, evaluation well, as well as development well, calculation of reserves,and compilation of development scheme in Tahe oilfield.