随机模拟技术在QHD32-6油田油藏地质模型随钻调整中的应用

QHD32 - 6油田主要含油层系是被断层复杂化了的明化镇组下段和馆陶组上段河流相砂体 ,砂体厚度横向变化较大。油藏形成受构造和岩性双重因素控制 ,存在多个油水系统 ,地质条件比较复杂。油田含油面积为39.7km2 ,探明储量为 1.70 34亿 t。开发好该油田的一个重要环节是针对其特有的地质条件做好随钻油藏地质建模工作 ,即随着开发井钻探方案的实施分阶段进行油藏地质模型调整 ,以指导开发井井网的调整和开发井的钻探。以地质框架模型建立、绝对波阻抗反演、岩性序贯高斯指示模拟、孔隙度高斯协模拟等技术为核心建立的随机模拟法 ,被证明是适合该油田地质特点的随钻油藏地质建模方法 ,应用于该油田 A、B平台所在区块取得了良好的效果

APPLICATIONS OF STOCHASTIC SIMULATION TO GEOLOGICAL MODEL ADJUSTMENT WHILE DRILLING IN QHD32-6 OILFIELD

The main reservoir of QHD32 6 oilfield is fluvial sands in Lower Minghuazhen Formation and Upper Guantao Formation, which are complicated by faulting and have great changes in thickness. Oil accumulation is controlled by both structure and lithology, resulting in multiple oil water system and complex geologic factors. The oil bearing area of the field is 39 7km 2 with proven reserves of 1 7034(108t. To increase the developing efficiency, it is important to adjust the geological reservoir model in different development drilling stages. By this way, we can increase the accuracy of reservoir model and effectively guide adjustment of well patterns and drilling of development wells. The stochastic simulation method, based on geological framework modelling, acoustic impedance inversion, lithology sequence gauss indicator simulation and porosity gauss co simulation, has proved to be suitable for QHD32 6 oilfield, with good results achieved on platform A and B of the filed.