一种深层断溶体油藏三维地质建模方法及系统

By establishing a fracture system, identifying static and dynamic boundaries, and combining wave impedance difference and structural tensor properties, large, medium, and small-scale fracture-vuggy models were constructed. This solved the accuracy problem of three-dimensional geological modeling of deep fault-dissolved reservoirs, and achieved accurate characterization of the reservoir's external contour and internal structure, providing a reliable geological basis for reservoir development.

CN116958458BActive Publication Date: 2026-07-17CHINA PETROLEUM & CHEMICAL CORP +1

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2022-04-15
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies lack three-dimensional geological modeling methods that accurately characterize the spatial morphology and complex internal structure of deep fault-dissolved reservoirs, resulting in insufficient accuracy and realism of the analysis results.

Method used

By utilizing static and dynamic data such as well logging, seismic prediction results, drilling time curves, and well-controlled reserves, a fracture system model is established to identify the static and dynamic boundaries of fracture-dissolved reservoirs. Combining wave impedance difference and structural tensor properties, large, medium, and small-scale fracture-vuggy models are constructed, and porosity and permeability models are established to form a three-dimensional geological model of fracture-dissolved reservoirs.

Benefits of technology

It enables accurate characterization of the external contour and internal structure of fractured-dissolved reservoirs, reflects the heterogeneity of the reservoirs, provides reliable geological basis for reservoir development, and improves the accuracy and authenticity of the analysis results.

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Abstract

本发明提供了一种深层断溶体油藏三维地质建模方法及系统,该方法以裂缝的发育特征为约束基于设定的方式分别建立大、中尺度裂缝模型,分析钻时变化识别结构张量静态边界,考虑不同钻遇储集体的试井曲线变化确定动态边界,综合动静边界建立轮廓模型;选取波阻抗差作为缝洞预测属性,结合放空漏失段分析建立大尺度缝洞模型,基于其和轮廓模型的约束,依据波阻抗差实现缝洞预测确定小尺度缝洞模型;针对放空漏失井和其他井分别独立建立孔隙度发育模型,考虑大、小尺度缝洞模型约束分别建立孔隙度和渗透率模型。本方案克服了现有技术无法准确表征油藏内部结构的不足,有效体现油藏非均质性,形成准确表征断溶体空间形态和内部结构的三维地质模型。
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