碳酸盐岩储层多尺度缝洞体分类表征——以塔河油田S80单元奥陶系油藏为例

发布时间：2018-05-01 17:11

本文选题：离散建模 + 缝洞体　；参考：《石油与天然气地质》2017年04期

【摘要】：碳酸盐岩缝洞型油藏受古地貌、构造及岩溶作用控制,储集体类型多样,主要以不同类型的大尺度溶洞、小尺度孔洞及多尺度裂缝为主,储集体成因机制不同,高度离散,传统连续性储层表征思路难以直接套用。以储集体识别和描述为基础,基于分类表征的思想对不同类型储集体分别进行刻画。以岩溶成因及野外露头为指导,综合地震定性预测与定量反演成果,对于风化壳成因、断控成因的大尺度溶洞分别采用序贯指示方法和基于目标的方法进行模拟。对于小尺度孔洞采用协同序贯指示模拟方法建模,对于多尺度裂缝则以地震信息为基础,采用人工解释、蚂蚁追踪与随机模拟相结合的方法进行表征。在分类表征基础上,根据岩溶成因规律构建分类储集体的融合原则,实现了分类模型的整合。结果表明:该方法能够有效表征S80单元缝洞型油藏的强非均质性特征,基于模型细化评价单元储量级别,设计新钻井位置,筛选有利目标区均取得较好效果,模型应用于油藏数值模拟,为指导剩余油挖潜与开发方案调整奠定地质基础。
[Abstract]:Carbonate fracture-cavity reservoirs are controlled by paleogeomorphology, tectonics and karstification, and the types of reservoirs are various. The reservoirs are mainly composed of different types of large scale cavities, small scale cavities and multi-scale fractures, and their genetic mechanisms are different and highly discrete. Traditional continuous reservoir characterization is difficult to be directly applied. On the basis of reservoir identification and description, different types of reservoirs are described based on the idea of classification and representation. Under the guidance of karst genesis and outcrop in the field, combined with the qualitative prediction and quantitative inversion results of earthquakes, the large-scale caverns of weathering crust origin and fault-controlled origin were simulated by sequential indication method and goal-based method respectively. For the small scale pores, the collaborative sequential indicator simulation method is used to model them, and the multi-scale fractures are characterized by artificial interpretation, ant tracing and random simulation based on seismic information. On the basis of classification and representation, the fusion principle of classified reservoir is constructed according to the law of karst genesis, and the integration of classification model is realized. The results show that this method can effectively characterize the strong heterogeneity of fracture-cavity reservoirs in S80 unit, refine the reserve level of evaluation units, design new drilling positions and screen favorable target areas based on the model. The model is applied to reservoir numerical simulation, which lays a geological foundation for guiding residual oil to tap potential and adjust development scheme.
【作者单位】：中国石化石油勘探开发研究院;
【基金】：国家科技重大专项(2016ZX05014-002) 中石化重大科技专项(ZDP17001)
【分类号】：P618.13

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