黔北凤岗地区页岩气吸附量影响因素分析

摘 要 页岩气的吸附态是页岩气开采的主要来源之一，为了研究黔北凤岗地区影响页岩气吸附量的因素，选取凤岗1井（FC-1）等的页岩作为实验研究对象，分别进行了有机碳含量、矿物组分、孔隙结构和等温吸附曲线等分析。研究表明：凤参1井及相邻试验井页岩平均有机碳含量为4.97%，主要矿物质以石英、粘土矿物和钠长石为主，页岩孔隙的形状多为不规则的球形、椭球形、三角形；页岩对甲烷的吸附量与有机碳含量、粘土矿物质、有机质孔隙和压力呈正相关，与温度、石英矿物质、水含量呈负相关。适当进行储层改造，改善控制开采过程中页岩气解吸的影响因素，对提高页岩气开采效率、延长开采时间具有重要意义。

Analysis on influence factors of adsorbance of shale gas in Fenggang area in northern Guizhou

[Abstract] The adsorption of shale gas is one of the main sources in the exploitation of shale gas, in order to research the factors influencing the adsorbance of shale gas in Fenggang area in northern Guizhou, selecting the shale of well 1 (FC-1) etc in Fenggang as research object of experiment, making an analysis on organic carbon content, mineral component, pore structure and adsorption isotherm etc respectively. Research shows that: Average organic carbon content of shale in Fenggang well 1 and the adjacent test well is 4.97%, the main minerals are quartz, clay minerals and albite, the shapes of shale pore are irregular sphere, ellipsoid, triangle; The adsorption of shale on methane is positively correlated with organic carbon content, clay mineral, organic matter pore and pressure, is negatively correlated with temperature, quartz mineral, water content. Remoulding the reservoir appropriately, improving the influence factors of shale gas desorption in the process of controlling and mining, it as important significance for improving the efficiency of shale gas production, extending the mining time.[Key words] Shale gas Adsorption capacity Influencing factors Organic carbon content Mineral Northern Guizhou