X气田飞仙关组礁滩相储层测井解释方法应用

doi:10.13809/j.cnki.cn32-1825/te.2021.05.012

摘要/Abstract

摘要：

礁滩相碳酸盐岩孔隙型储层岩性及孔隙类型多样、孔喉结构复杂,是造成复杂孔渗关系的根本因素,极大地影响了储层参数,尤其是渗透率解释的准确度,给储层评价工作带来了很大的难度。以X气田飞仙关组礁滩相储层为例,在明确储层四性关系的基础上,根据岩心分析、铸体薄片、压汞分析以及测井资料,采用密度曲线与声波时差曲线变化特征定义了参数测井曲线幅度差,再将新参数与密度曲线进行交会,利用多元回归分析方法建立孔隙类型识别模板,最终,构建了基于孔隙类型识别的储层参数解释模型,来准确解释礁滩相孔隙型储层参数。实例解释结果表明,具有孔隙识别能力的测井解释模型明显提高了礁滩相储层测井解释准确率,可为国内外同类型的礁滩相储层测井解释提供技术方法的参考。

关键词: 礁滩相储层, 碳酸盐岩, 孔隙类型, 测井解释模型, 储层评价

Abstract:

For the reef carbonate reservoirs, the vxdarious lithology and pore types and the complex throat structure are the fundamental factors of complex pore-permeability relations, which greatly affect the accuracy of the reservoir parameters, especially the logging interpretation of permeability, and bring great difficulty to the reservoir evaluation. First, the reef-flat facies reservoir of Feixianguan Formation in X Gas Field is took as an example to define the amplitude difference of the logging curve by the change characteristics of density curve and acoustic time difference curve on the basis of clarifying the four property relationship of the reservoir and according to the data of core analysis, casting thin section, mercury injection analysis and logging. And than, the cross plot of the new parameters and the density curve is made to establish the pore type identification template by the multiple regression analysis method. At last, the reservoir parameter interpretation model based on the pore type identification is established to make the accurate interpretation of the parameters of the reef-flat facies poro us reservoir. The interpretation results show that the logging interpretation model with pore identification ability can significantly improve the logging interpretation accuracy of reef-flat facies reservoir, and can provide technical reference for the logging interpretation of the same reservoir type.

Key words: reef-flat facies reservoir, carbonate, pore type, logging interpretation model, reservoir evaluation

中图分类号:

TE132

区舫,杨辉廷,黄晓兵. X气田飞仙关组礁滩相储层测井解释方法应用[J]. 油气藏评价与开发, 2021, 11(5): 744-752.

OU Fang,YANG Huiting,HUANG Xiaobing. Application of logging interpretation method for reef shoal reservoir in Feixianguan Formation of X Gas Field[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(5): 744-752.

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深度（m）	岩心孔隙度（%）	原解释		新解释
深度（m）	岩心孔隙度（%）	孔隙度（%）	相对误差（%）	孔隙度（%）	相对误差（%）
5 555~5 600	6.788	4.152	38.833	7.804	14.968
5 600~5 645	13.132	9.207	29.889	13.404	2.071
5 645~5 680	8.461	5.571	34.157	9.592	13.367

深度（m）	岩心渗透率（10^-3 μm²）	原解释		新解释
深度（m）	岩心渗透率（10^-3 μm²）	渗透率（10^-3 μm²）	相对误差（%）	渗透率（10^-3 μm²）	相对误差（%）
5 555~5 600	2.947	2.682	8.992	1.343	54.428
5 600~5 645	2.956	50.935	1 623.106	3.171	7.273
5 645~5 680	29.537	4.572	84.521	6.623	77.577

层号	深度（m）	厚度（m）	产气量（10⁴ m³/d）	本次测井解释孔隙度（%）	本次测井解释渗透率（10^-3 μm²）	原测井解释渗透率（10^-3 μm²）
1	5 258.0~5 277.7	19.7	7.61	5.42	1.230	1.117
2	5 336.9~5 343.3	6.4	14.30	6.41	15.250	0.714
3	5 375.8~5 389.5	13.7	8.15	17.42	0.145	25.310