CAJ | 학술논문

页岩气储层孔隙特征与微观结构对页岩气勘探开发具有重要意义。以五峰组、龙马溪组样品为例，使用常规扫描电镜、氩离子抛光－场发射扫描电镜对孔隙特征、微观结构进行观测，识别出多种成因－形貌孔隙类型，对储层孔隙特征进行了刻画，认为页岩储层孔隙主体处于纳米级别，孔隙形态复杂，类型多样，微裂隙发育；微米级的孔隙与微观结构可以由常规扫描电镜直接观测，而氩离子抛光蚀刻处理有利于纳米级孔隙的定性观测。分析对比了常规扫描电镜、氩离子抛光－场发射扫描电镜试验方法的优势与不足，提出将定性与定量研究手段相综合，在利用扫描电镜系统观测页岩储层孔隙结构的基础上，结合使用高压压汞、气体吸附等定量化方法可以全面描述页岩孔隙特征，是目前对页岩储层孔隙特征进行综合表征的最佳手段。
혈암기저층공극특정여미관결구대혈암기감탐개발구유중요의의。이오봉조、룡마계조양품위례，사용상규소묘전경、아리자포광－장발사소묘전경대공극특정、미관결구진행관측，식별출다충성인－형모공극류형，대저층공극특정진행료각화，인위혈암저층공극주체처우납미급별，공극형태복잡，류형다양，미렬극발육；미미급적공극여미관결구가이유상규소묘전경직접관측，이아리자포광식각처리유리우납미급공극적정성관측。분석대비료상규소묘전경、아리자포광－장발사소묘전경시험방법적우세여불족，제출장정성여정량연구수단상종합，재이용소묘전경계통관측혈암저층공극결구적기출상，결합사용고압압홍、기체흡부등정양화방법가이전면묘술혈암공극특정，시목전대혈암저층공극특정진행종합표정적최가수단。
The characteristics and microstructure of pores in shale gas reservoir are valuable for shale gas exploration and development. The characteristics of pores and microstructures of Wufeng Formation and Longmaxi Formation were observed by using conventional scanning electron microscopy and argon ion polishing?field emission scanning electron microscopy. A variety of pores were identified and the reservoir pore characteristics were described. The results show that the main body of shale reservoir pores are at nanoscale, the configuration of pores are complex and in different types, and micro?fractures develop. The porosity in the micron grade and the microstructure can be observed directly by the conventional scanning electron microscopy. Argon ion etching polishing to the samples is advantageous to the observation of the pore at nanoscale. The advantages and disadvantages of scanning electron microscopy and argon ion polishing?field emission scanning electron microscopy test method were discussed. To get a comprehensive description of the shale pore features, the qualitative and quantitative researches can be implemented by using quantitative methods like high pressure mercury injection and gas adsorption on the basis of scanning electron microscopy.