深部煤层气储层测井解释技术及应用
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原俊红(1981—),男,山西清徐人,讲师,在读博士研究生,从事工程地质方面的研究。联系电话:18852146108,E-mail:yuanjunhong@cumt.edu.cn。

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国家科技重大专项“煤层气井地电法数据处理技术”(2011ZX05035)。


Logging interpretation technology and its application to deep coalbed methane reservoir
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    摘要:

    由于深部煤层取心资料和室内测试数据少,难以准确识别煤层煤体结构、显微组分、含气量与渗透率等关键 参数,不利于煤层气有利开发区预测。为此,利用数理统计方法,将测井资料与实验室测试数据、现场注入压降试 井数据对比分析,建立了研究区煤层参数测井解释模型,并应用该模型进一步对煤层进行综合评价。结果表明,煤 岩工业组分、煤层含气量和渗透率测井模型计算结果误差分别为0~13.8%,1.9%~16.5%和4.2%~28.6%,证实模 型可靠,具有较好的应用前景。根据测井解释模型分别计算研究区煤层厚度、渗透率、含气量及煤体结构等地质参 数,根据这些参数将煤层分成Ⅰ类、Ⅱ类和Ⅲ类,其中Ⅰ类煤层理论产气量大于1 000 m3/d,为高产气区;Ⅱ类煤层理 论产气量大于500~1 000 m3/d,为中等产气区;Ⅲ类煤层理论产气量小于500 m3/d,为低产气区。

    Abstract:

    Since the coring data and indoor test data of deep coal seam are few,it is difficult to identify the key parameters of coal seam structure,maceral,gas content and permeability,which is not conducive to the prediction of favorable coalbed methane development zones. To solve this problem,the logging data were compared with the laboratory test data and the injection pressure drop testing data using the mathematical statistics method to compare. The log interpretation model of coal reservoir parameters was established and applied to further coal seam evaluation in the study area. The results show that the errors resulted from the logging model computation of components of coal industry,coalbed methane content and permeability logging are 0~13.8%,1.9%~16.5% and 4.2%~28.6%,respectively. The model is effective and reliable and has a good application prospect. The geological parameters of coal seam thickness,permeability,gas content and coal seam structure in the study area were calculated. On this basis,the coal seam was divided into class Ⅰ,Ⅱ and Ⅲ. The theoretical gas production is higher than 1 000 m3/d in the class I which is a high yield gas area;the theoretical gas production is between 500 and 1000 m3/d in the class Ⅱ which is a medium gas producing area;and the theoretical gas production is less than 500 m3/d in the class Ⅲ which is a low production area.

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原俊红,付玉通,宋昱.深部煤层气储层测井解释技术及应用[J].油气地质与采收率,2018,25(5):24~31

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  • 在线发布日期: 2018-09-13