BZ油田浅水三角洲储层地质建模研究

针对渤海湾浅水三角洲油藏分流河道纵向多期叠置,横向变化快的地质特点及开发早期钻井资料少和海上地震资料分辨率高的特点,运用储层沉积学原理,通过沉积模式、沉积微相和储层结构模型分类及其特征参数统计建立了储层地质知识库。在此基础上,结合地震资料建立了沉积相模型和相控约束下的储层参数模型,为油田开发方案优化和随钻跟踪提供了可靠的静态模型。经实钻开发井及生产动态资料证实,所建储层三维定量地质模型较准确地表征了储层砂体横向变化规律,能够为开发早期储层研究提供地质支撑。

Study on Geologic Modeling of Shallow Water Delta Reservoirs in BZ Oilfield

The shallow water delta reservoirs in Bohai Bay are multi-stage superimposed distributary channel sand body,with rapid lateral change.In addition,the well drilling data are not enough at the early development stage and the seismic data resolution of shallow water delta reservoir is high.Through application of reservoir sedimentology principle,the geological knowledge database has been established by construction of the depositional models,study on sedimentary microfacies,and classification of reservoir structure model and statistic analysis of the parameters for constructing reservoir structure models.Based on those study results,the reservoir parameter models have been established under the constraint of sedimentary microfacies in combination with the seismic data,providing reliable static models for optimization of development plan and tracing while drilling at the early development stage. It has been confirmed by well drilling data and dynamic production data that the 3D quantitative geological model is reliable,and the lateral variation of sand bodies can be predicted accurately with this model.Simultaneously,the 3D geological model can provide support for the study of reservoir at the early development stage.