苏丹M盆地P油田退积型辫状三角洲沉积体系储集层综合预测

Reservoir prediction of the retrogradation braided delta depositional system of P Oilfield in the M Basin,Sudan

在储集层预测中如何有效运用地球物理技术,是储集层预测中所面临的难题。在对苏丹M盆地P油田退积型辫状三角洲沉积体系储集层预测中,总结出结合各种地球物理方法综合预测储集层的研究思路。首先根据已钻井的岩心和录井资料,划分典型井取心段沉积微相,确定研究区目的层沉积环境;然后,以取心段沉积相特征为依据,结合相应的测井信息,将研究区所有井目的层划分为辫状三角洲平原亚相、辫状三角洲前缘亚相和前辫状三角洲亚相;最后,运用沉积相研究结果,结合高精度井震标定技术,确定主力储集层段地震反射特征,划分地震相,同时运用地震反演技术研究不同砂体的展布特征及其发育期次,并寻找不同砂体的物源方向,对储集层进行综合预测。

It is always challenging to use geophysical technology options in reservoir prediction. A set of methods which will combine various geophysical technologies have been summed up through the reservoir prediction of the retrogradation braided delta depositional system of P Oilfield in the M Basin, Sudan. According to the data of core and logging, the depositional environment can be defined and sub-facies and micro-facies can be identified on the bases of depositional characteristics of core and log responses, delta plain, delta front and pro-deha have been classified in target formation of wells in the oilfield; and the depositional facies analysis and the technology of calibration of well and seismic are used to determine the characteristics of the reservoir, and define the seismic facies. The extension and development of different sands by the technology of impedance inversion could be used for the comprehensive reservoir evaluation.