石油实验地质2016，Vol.38Issue(3)：320-325,332,7.DOI:10.11781/sysydz201603320
川东南五峰—龙马溪组页岩储层六性特征及主控因素分析
Six characteristics and main controlling factors of shale reservoirs in the Wufeng-Longmaxi formations, southeastern Sichuan Basin
摘要
Abstract
Shale gas exploration in the Wufeng-Longmaxi formations in the southeastern Sichuan Basin showed different results. Some wells were high yielding, some were low yielding, and some were dry. Well core descrip?tion, geochemical analysis, SEM, X?ray diffraction, field gas content tests, and well logging analysis were applied to compare samples from over 10 shale gas wells. Six properties were studied, including lithology, geochemical features, brittleness, physical properties, gas?bearing capacity, and electrical resistivity. Lithology, geochemical features, and brittleness show good correlation. For example, radiolarian carbonaceous graptolite shale has high TOC content and brittleness index. These three properties were controlled by sedimentary environment and facies, and can be compared among wells in the study area. Physical properties are positively correlated with gas?bearing capacity. They were affected by tectonic deformations, and vary obviously among wells. Physical properties are positively correlated with TOC content. Shale attitude and fault development are the main factors which affect gas content because the horizontal permeability of shale is several times larger than vertical permeability. Gas content also affected shale porosity and permeability. Radiolarian carbonaceous graptolite shales with few faults are favor?able for the preservation of pressure and pores, and can form industrial reservoirs featured by high GR, high resistivity, relatively high AC, high U content, low KTH, low NGR, and low density.关键词
岩性特征/地化特征/可压裂性特征/物性特征/含气性特征/电性特征/页岩储层/五峰—龙马溪组/川东南Key words
lithologic feature/geochemical feature/fracturing feature/physical property/gas?bearing capacity/electricity/shale reservoir/Wufeng-Longmaxi formations/southeastern Sichuan Basin分类
能源科技引用本文复制引用
张汉荣,王强,倪楷,李春燕..川东南五峰—龙马溪组页岩储层六性特征及主控因素分析[J].石油实验地质,2016,38(3):320-325,332,7.基金项目
中国石油化工集团公司科技项目( P13129)资助. （ P13129）
