基于三维形态建模的断层封堵量化分析方法研究

发布时间：2018-02-07 17:45

本文关键词： 断层封堵曲面插值曲面外延三角剖分曲面求交　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：断层的封闭程度对于预测油气分布的位置和富集程度具有决定性的作用,分析断层的封堵性在地质勘探中就显得尤为重要。断层封闭性受断层的受力状况、断层的力学性质、断层的产状及两侧岩性配置、断层剪切带等许多条件的影响。由于断层封闭性受到多种因素的影响,所以是非常复杂的地质难题。分析断层封闭性,即是研究断层的各项属性,分析多种因素对断层封堵性的影响力,为油气藏勘探开发中的地质分析工作提供重要依据。本文总结了国内国外对断层封闭性的研究成果,在分析总结前人成果的基础上,提出了基于三维形态建模的断层封堵量化分析方法(FSD)处理断层数据与层位数据。基于FSD方法对层位数据和断层数据进行丰富扩充:使用基于线性分段插值算法对层位数据进行二次插值,在插值的基础上,对地层曲面的曲面边界使用多项式外推法进行延展;对断层数据进行基于最小二乘法的趋势面拟合。在对地震解释数据进行丰富完善之后,对断层曲面和层位曲面进行三角剖分,通过剖分得到的三角网格曲面计算出两个曲面之间的交线。最后结合钻井分析得到的地层岩性文件,进行岩性对接,基于岩性配置法和泥岩涂抹法对断层的封堵性进行评价。课题完成了基于FSD方法的断层封堵性原型实验,将所提出的数学模型编制成为可视化软件,并且使用此可视化软件对井“坨128-10”与井“坨764”所在的断层的封堵性进行了综合评价,得到了岩性封堵评价图、岩性配置结果图、断层断距图、断层SSF封堵指数图和综合评价图。原型实验表明,FSD方法处理断层数据和地层数据非常有效,得到的结果误差更小,更为准确。
[Abstract]:The sealing degree of faults plays a decisive role in predicting the location and enrichment of oil and gas distribution. It is particularly important to analyze the sealing property of faults in geological exploration. The occurrence of faults, the disposition of lithology on both sides, the fault shear zone and many other conditions. Because the sealing of faults is affected by many factors, it is a very complicated geological problem. To analyze fault sealing is to study the properties of faults. This paper analyzes the influence of many factors on fault plugging, which provides an important basis for geological analysis in exploration and development of oil and gas reservoirs. This paper summarizes the research results of fault sealing at home and abroad, and on the basis of analyzing and summarizing the previous results, In this paper, a quantitative fault plugging analysis method based on 3D morphological modeling is proposed to deal with fault data and horizon data. Based on FSD method, horizon data and fault data are enriched and expanded. Linear piecewise interpolation algorithm is used to solve the problem. The interval data is interpolated by quadratic interpolation. On the basis of interpolation, the surface boundary of stratigraphic surface is extended by polynomial extrapolation, and the fault data is fitted with trend surface based on least square method. The triangulation of fault surface and horizon surface is carried out, and the intersection line between the two surfaces is calculated by triangulating the triangular mesh surface. Finally, the lithology docking is carried out by combining the formation lithology file obtained from drilling analysis. Based on the lithologic collocation method and mudstone smear method, the fault plugging property is evaluated. The prototype experiment of fault plugging property based on FSD method is completed, and the proposed mathematical model is programmed as a visual software. The sealing property of the fault located in Tuo 128-10 and Tuo 764 is evaluated by using this visualization software, and the lithologic plugging evaluation map, lithologic disposition result map and fault fault spacing map are obtained. The prototype experiment shows that the SSF method is very effective in processing fault and formation data, and the error is smaller and more accurate.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE319

【相似文献】