裂缝密度约束的离散裂缝网络建模方法与实现
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本文为石油化工联合基金项目(编号:U1663203)与国家科技重大专项(编号:2017ZX05013004)的成果。


Principle and Implementation of Discrete Fracture Network Modeling Controlled by Fracture Density
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    摘要:

    如何高效地用多种类型资料(如地震、测井、岩芯等)所得到的裂缝信息对离散裂缝网络建模至关重要。为此本文提出一种裂缝密度约束的离散裂缝网络建模方法,将多种裂缝先验信息转换为裂缝密度,通过密度约束裂缝网络模型。方法对裂缝位置的确定方法进行改进,从编程的角度对二维和三维实现进行了分析,同时讨论了方法的适用性及参数设定。为验证方法效果,实例分析部分选用鄂尔多斯盆地延河剖面附近的一井区数据进行裂缝建模,并与实际生产资料进行比对,结果表明该方法所建立的裂缝模型与实际生产数据吻合。

    Abstract:

    Objectives:Distribution of fracture is crucial for the development of tight reservoir. Discrete fracture network modeling is the commonest method for fracture modeling. During the oil and gas reservoir exploration and development, many types of data (such as seismic, logging and core) can be obtained to calculate the fracture density as the constraint condition of discrete fracture network modeling. How to make good use of these constraints is important for making an effective fracture model. So a method of discrete fracture network fracture constrained by fracture density is introduced.Methods: Based on discrete fracture network modeling using marked point process, the proposed method tries to improve the fracture position determination algorithm. The implementation is revising the pointing process controlled by fracture density. The fracture density constraint in this paper is obtained by sequential Gaussian simulation using logging data and the stress field numerical model. This paper introduces the implementation of the method in 2D and 3D from the respect of programming implementation. In the meanwhile, the applicability of the method and parameters setting of the method are discussed, too.Results:In order to verify the efficiency of the method, the case study chooses a practical well block near Yanhe profile to implement fracture modeling. The results show that the fracture model is in good agreement with the actual production data.Conclusions:From the result that the fracture model built by the proposed method agreed with the actual production data, the conclusion is drawn that the proposed method is suitable for fracture modeling in the tight reservoir.

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董少群,曾联波,曹菡,XU Chaoshui,王圣娇.2018.裂缝密度约束的离散裂缝网络建模方法与实现[J].地质论评,64(5):1302-1314,[DOI].
DONG Shaoqun, ZENG Lianbo, CAO Han, XU Chaoshui, WANG Shengjiao.2018. Principle and Implementation of Discrete Fracture Network Modeling Controlled by Fracture Density[J]. Geological Review,64(5):1302-1314.

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  • 收稿日期:2018-01-19
  • 最后修改日期:2018-05-14
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  • 在线发布日期: 2018-09-14
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