中文摘要：

本文以四川盆地南方海相龙马溪组页岩为研究对象,考虑页岩中吸附相所占孔隙度,分析了不同储层温度和压力下对页岩储层赋存形态的影响,得出了页岩埋藏深度与吸附气、游离气和总页岩气。分析结果表明：页岩储层压力增大,页岩的吸附能力逐渐减弱,吸附气量增加趋势减小,吸附气占页岩气总储量的百分数降低;页岩游离气含量与储层压力之间存在正相关关系;在低储层压力阶段,岩气总储量随储层压力增加迅速增大,在高储层压力阶段,页岩气总储量随储层压力增加而增大;吸附是放热过程,储层温度越高,页岩储层对甲烷的吸附能力降低。随着储层温度增大,气体分子热运动加快,页岩的吸附能力减弱,吸附量降低;页岩埋深增加,储层压力和温度增大,吸附气量先增加而后降低,游离气线性增加,页岩气总储量先迅速增大而后逐渐趋于平缓。

英文摘要：

This paper take the Longmaxi shale paly in the southern marine of Sichuan basin as research objects, and analyze the shale gas occurrence under the different reservoir temperature and reservoir pressure in consideration of the pore volume in shale through the methane experiment. The study shows that when the pressure of shale layer increase, the adsorption capacity of the shale becomes gradually slow, and the percentage of the adsorption gas reduces. This is consistent with the relation between free gas and the reservoir pressure. In stage of low reservoir pressure, total reserves of shale gas quickly increases for the in- creasing of reservoir pressure. When the reservoir pressure is higher than 3 MPa, shale gas total reserves show an obvious positive correlation with the reservoir pressure. Adsorption is exothermic process, the higher the temperature of reservoir, the lower methane adsorption capacity of shale reservoirs. With the reservoir temperature increasing, gas molecular thermal motion accelerates, and shale adsorption capacity decreases, With shale buried depth increasing, the reservoir pressure and temperature increase, and the adsorption volume first increases and then reduces, and free gas increases linearly, and shale gas reserves increases at first and then gradually flatten out.