河流相储层平面连续性精细描述

A DETAILED DESCRIPTION OF AREA CONTINUITY OF FLUVIAL RESERVOIR

河流相储层在大庆油田的产油层中占有重要比例，河流相储层的平面连续性是影响其非均质性的主要方面，是油藏精细描述和建模的基础和关键。近年来，众多研究者采用露头调查类比的方法进行油田地下储层的精细描述和建模工作，但受限于沉积环境、沉积条件的不确定性，该方法具有一定的局限性。文中利用深度开发阶段老油田密井网提供的丰富的动、静态资料，将沉积过程分析、界面分析、测井曲线分析及油田动态资料分析相结合的思路应用于油田地下研究，进行河流相储层平面连续性精细描述，重点探讨了储层细分微相、单一河道砂体的识别及砂体之间的连通性等内容。研究成果对老油田储层建模及剩余油分布的地质研究工作具有借鉴意义。

Fluvial reservoirs cover a fairly important proportion of production reserves.Areal continuity is a predominant factor that affects their heterogeneities,which also is essential for detailed reservoir description and modeling .In recent years,researchers made reservoir description and modelling by taking the techniques of outcrops investigation analogy.However,the application of outcrops analgy investigation is limited by the uncertainties of sedimentary environment and deposition condition.Based on the abundant static and dynamic state data,analysis of comprehensive utilization of sedimentary process ,sandbodies boundary,log curves and dynamic state were applied into subsurface study for detailed description of fluvial in area.Discussion is focused on subdividing of genetic unit,microfacies study, recognition of sandbodies of single channels and detailed description of their continuites.The achivements provide successful experiences for geological study of reservoir modeling and residual oil study of old oilfield during EOR.