CAJ | 학술논문

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。
혈암기시일충중요적비상규천연기，기중상당일부분적천연기이흡부태존재。흡부기함량시혈암기자원평개화목표구우선적관건성삼수，야시평개혈암시부구유경제개채개치적일개중요표준。위료탐토천서요함신혈HF-1정수오단니혈암흡부기함량주공인소，선취료해정수오단니혈암양품진행동일온도하적등온흡부실험，획득혈암등온흡부특정곡선급Langmuir체적화Langmuir압력치，분석압력대혈암흡부기함량적영향정도，이용Langmuir모형계산지층압력조건하적흡부기함량。이용실험수거분석료신혈HF-1정수오단니혈암흡부기함량여비표면적、공극도、밀도、성숙도、습도화압력각단인소지간적상관관계，연후운용SPSS연건대흡부기함량적궤개영향인소진행료주성분분석。결과표명：비표면적、습도화압력시영향신혈HF-1정수오단니혈암흡부기함량적주요인소。최후건립료동시고필저3개주공인소적혈암흡부기함량계산신모형。통과신모형가이계산출신혈HF-1정수오단미지니혈암적흡부기함량，계산결과여실측치지간상관계수고，결과준학가고，시일충평개등온조건하혈암흡부기함량적호방법，대혈암흡부기함량평개구유일정적지도의의。
Gas shales are important unconventional gas reservoirs in which much of the gas is stored in the ad-sorbed 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 influ-ence 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 spe-cific 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 ad-sorbed 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.