油田开发后期的相控建模

Facies-Controlled Modeling for Mature Oilfield Development

采用相控建模的思路是提高储集层建模精度的关键。根据成熟开发油田的技术、信息特点,提出了沉积学微相建模与参数定量预测的思路、方法和主要步骤。对低弯度分流河道砂体开展了建模实例研究。预测结果表明,与常规的非相控参数预测相比,前者的预测结果,促进了地质概念向模型转化,建模结果更符合地下地质实际。这一思路有利于发挥地质家的经验、知识和技能,其结果将更好地发挥地质的约束作用,同时也更适合我国油藏描述的基础和实际。文中同时指出,进一步的实践中可考虑沉积学微相建模与随机参数预测结合的思路。

Facies-controlled modeling facilitates great improvement of accuracy of reservoir model. Based on specific characteristics of techniques and information from mature oilfield development, the research thought, method and key procedure of integrating depositional microfacies modeling with facies-controlled reservoir parameter prediction are proposed. A case study is made for low sinuosity of distributary channel sandbody. The result shows that compared with conventional reservoir parameter prediction, the facies-controlled modeling has greatly promoted the conversion of geological concept to the model, bringing about more reliable and matched in-situ conditions. The study will be beneficial to employing the knowledge, experience and skill from a geologist, intensifying restriction in geology so as to better fit the practical conditions of domestic reservoir characterization for mature oilfield development. Meanwhile, integrating depositional microfacies modeling with stochastic reservoir parameter prediction is advisable or recommended for further modeling practices.