裂缝性碳酸盐岩裂缝的双侧向测井响应特征及解释方法

邓少贵; 王晓畅; 范宜仁

裂缝性碳酸盐岩裂缝的双侧向测井响应特征及解释方法

中国石油大学地球资源与信息学院山东东营 257061

基金项目:

国家高技术研究发展计划项目 863-306-ZT01-02-3

中国石油天然气集团公司创新基金项目 W060122

详细信息

作者简介:
邓少贵(1970-)，男，博士，主要从事电测井的理论计算及岩石物理实验研究.E-mail：dengshg@mail.hdpu.edu.cn

中图分类号: P631.8
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出版历程
- 收稿日期: 2006-03-12
- 刊出日期: 2006-11-25

Response of Dual Laterolog to Fractures in Fractured Carbonate Formation and Its Interpretation

School of Georesources and Information, China University of Petroleum, Dongying 257061, China

摘要

摘要: 裂缝评价是裂缝性碳酸盐岩储层评价的关键, 其常规评价方法受到裂缝发育的不均匀性及储层各向异性的影响而存在诸多困难.采用三维数值算法, 利用宏观各向异性地层模型, 研究不同的裂缝参数条件下双侧向测井响应特征, 由此导出一种用于裂缝孔隙度计算的快速算法.分析表明, 裂缝的双侧向响应同裂缝孔隙度与孔隙流体电导率之间存在明显的线性关系, 裂缝的倾角造成双侧向测井曲线幅度差异的变化; 不同倾斜情况下, 将双侧向测井响应近似表示为岩石基岩电阻率、裂缝孔隙度、裂缝流体电导率的函数, 用于裂缝孔隙度的快速计算.实际资料处理表明, 利用双侧向依据该方法确定的裂缝参数同成像测井资料具有良好的对应性.
- 裂缝 /
- 双侧向 /
- 碳酸盐岩 /
- 储层
Abstract: The estimation of fractures is a key to the evaluation of the fractured carbonate reservoirs. Many obstacles are present for the evaluation of this kind of reservoir because of its heterogeneously-distributed fractures and anisotropies. A three-dimensional numerical algorithm based on a macro-isotropic anisotropic model, a fast fracture-computing method, may simulate the responses of the dual-laterolog in fractured formation. Firstly, the apparent conductivity of dual-laterolog is linearly related to the porosity of fracture and to the conductivity of pore fluid. Secondly, the amplitude difference of the deep and shallow apparent resistivity logs was dependent mainly on the dip angle of the fracture. Thirdly, the response of dual laterolog of formation with dip angle fractures is approximately depicted as a function of bulk resistivity of rock, porosity of fracture and conductivity of fracture fluid, for the rapid computation of the fracture porosity. The research data show that the fracture parameters determined by the dual laterolog coincide well with the formation micro-image log.
- fracture /
- dual laterolog /
- carbonate rock /
- reservoir

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图 1 裂缝的平板模型

Fig. 1. Plane model of fracture

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图 2 深、浅侧向视电导率与裂缝孔隙度与孔隙流体的关系

Fig. 2. Relation between dual-laterolog apparent conductivity and fracture porosity and fluid

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图 3 宏观各向异性岩层双侧向测井响应与裂缝倾角的关系

Fig. 3. Relation between the dual-laterolog response and dip angle of fracture in macro-anisotropic reservoir

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图 4 裂缝地层的双侧向视电阻率的快速计算与三维数值计算结果对比

Fig. 4. Comparison between the fast and 3-dimensional arithmetic results of dual-laterolog apparent conductivity in fractrured reservoir

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图 5 某油田裂缝性碳酸盐岩裂缝参数处理结果

Fig. 5. Computing results of fracture parameters in a fractured carbonate reservoir

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