| 川西坳陷新页HF-1井须五段泥页岩吸附气含量主控因素及其定量预测模型 |
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| 引用本文： | 陈磊,姜振学,邢金艳,陈冬霞,谢明贤,纪文明.川西坳陷新页HF-1井须五段泥页岩吸附气含量主控因素及其定量预测模型[J].现代地质,2014,28(4):824-831. |
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| 作者姓名： | 陈磊 姜振学 邢金艳 陈冬霞 谢明贤 纪文明 |
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| 作者单位： | (1. 中国石油大学(北京)油气资源与探测国家重点实验室，北京102249；
2. 中国石油大学(北京)非常规天然气研究院，北京102249；3. 中国石油大学(北京)地球科学学院，北京102249) |
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| 基金项目： | 国家科技重大专项“大型油气田及煤层气开发”(2011ZX05003-001) |
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| 摘 要： | 页岩气是一种重要的非常规天然气，其中相当一部分的天然气以吸附态存在。吸附气含量是页岩气资源评价和目标区优选的关键性参数，也是评价页岩是否具有经济开采价值的一个重要标准。为了探讨川西坳陷新页HF-1井须五段泥页岩吸附气含量主控因素，选取了该井须五段泥页岩样品进行同一温度下的等温吸附实验，获得页岩等温吸附特征曲线及Langmuir体积和Langmuir压力值，分析压力对页岩吸附气含量的影响程度，利用Langmuir模型计算地层压力条件下的吸附气含量。利用实验数据分析了新页HF-1井须五段泥页岩吸附气含量与比表面积、孔隙度、密度、成熟度、湿度和压力各单因素之间的相关关系，然后运用SPSS软件对吸附气含量的几个影响因素进行了主成分分析。结果表明：比表面积、湿度和压力是影响新页HF-1井须五段泥页岩吸附气含量的主要因素。最后建立了同时考虑这3个主控因素的页岩吸附气含量计算新模型。通过新模型可以计算出新页HF-1井须五段未知泥页岩的吸附气含量，计算结果与实测值之间相关系数高，结果准确可靠，是一种评价等温条件下页岩吸附气含量的好方法，对页岩吸附气含量评价具有一定的指导意义。
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| 关 键 词： | 新页HF-1井 吸附气含量 压力 比表面积 主控因素 新模型 |
Main Controlling Factors and Prediction Model of Adsorbed Gas Content in the Fifth Member of Xujiahe Formation from Well Xinye HF-1, Western Sichuan Depression |
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| CHEN Lei,JIANG Zhen-xue,XING Jin-yan,CHEN Dong-xia,XIE Ming-xian,JI Wen-ming.Main Controlling Factors and Prediction Model of Adsorbed Gas Content in the Fifth Member of Xujiahe Formation from Well Xinye HF-1, Western Sichuan Depression[J].Geoscience——Journal of Graduate School,China University of Geosciences,2014,28(4):824-831. |
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| Authors: | CHEN Lei JIANG Zhen-xue XING Jin-yan CHEN Dong-xia XIE Ming-xian JI Wen-ming |
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| Institution: | (1.State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing102249, China;
2.Unconventional Natural Gas Institute, China University of Petroleum, Beijing102249, China;
3.College of Geosciences, China University of Petroleum, Beijing102249, China) |
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| Abstract: | Gas shales are important unconventional gas reservoirs in which much of the gas is stored in the adsorbed state.The amount of shale adsorbed gas is not only a key parameter of shale gas resource evaluation and target area selection,but also an important standard to evaluate the economic mining value of shale.In order to study the main controlling factors of adsorbed gas content of the Fifth Member of Xujiahe Formation from Well Xinye HF-1 in the western Sichuan Depression,we do the isothermal adsorption experiment to obtain the curve of shale adsorption and the parameters of Langmuir volume and Langmuir pressure.We discuss the influence of pressure on shale adsorbed gas and use the Langmuir model to calculate the amount of shale adsorbed gas under formation pressure conditions. In the Fifth Member of Xujiahe Formation from Well Xinye HF-1 in the western Sichuan Depression,shale adsorbed gas content may be influenced by various factors such as specific surface area,porosity,density,maturity,humidity of shale and pressure.Based on the experimental data,we performed a correlative analysis of factors that may influence shale adsorbed gas content.Correlation and principal component analysis were adopted to obtain the main controlling factors including specific surface area, humidity of shale and pressure. Finally,we establish a new model to calculate the amount of shale adsorbed gas as considering specific surface area, humidity of shale,pressure.The new model has a potential ability to calculate the amount of the unknown shale adsorbed gas and the calculation result is found to be in consistent with the experimental data,so it is accurate and reliable.This study is a good method for evaluation of shale adsorbed gas content under isothermal condition,which has a certain guiding significance. |
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| Keywords: | Well Xinye HF-1 adsorbed gas content pressure specific surface area main controlling factor new model |
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