胶莱盆地水南组陆相页岩含气量计算

为定量表征胶莱盆地暗色泥页岩含气性，对研究区样品进行了等温吸附实验，以及吸附气、游离气含量的定性分析和定量计算，通过对吸附气、游离气含量的计算来确定其总的含气量。泥页岩等温吸附实验表明：胶莱盆地水南组暗色泥页岩有机碳含量主要集中在0.27-2.92%，最大吸附量范围为0.85-1.60m3/t，且最大吸附量与有机碳含量大致呈正比关系。对胶莱盆地进行含气量分析计算发现：各不同凹陷泥页岩含气量随着埋深的增大总体呈先逐渐增大后趋于平缓的变化趋势，且含气量主要介于0.50m3/t~1.80m3/t，其中以莱阳凹陷水南组泥页岩含气量最大，最高可达1.80m3/t，莱阳凹陷可作为将来勘探开发的首选目标区。研究表明，有机碳含量和孔隙度是影响页岩气含量最主要的两大因素，有机碳含量越高，孔隙度越大，其含气性越好；但在不同埋深下的吸附气、游离气含气量主要受地层温度和压力的影响，且两者随温度压力的变化而发生相互转化；在一定埋深下，地层中气体吸附解吸可达到一个平衡状态。

Calculation of gas content of continental shale in Shannan Formation of Jiaolai Basin

In order to quantitatively characterize the gas content of the dark shale in the Jiaolai basin.The isothermal adsorption experiments were carried out on the samples in the study area, and qualitative analysis and quantitative calculation of adsorption gas and free gas content,The total gas content of this zone was determined by calculating the free gas content of adsorbed gas.The results of isothermal adsorption experiments show the organic carbon content of the dark shale in the Shainan Formation in the Jiaolai basin is mainly 0.27-2.92%, and the maximum adsorption range is 0.85-1.60m3/t,and the maximum adsorption capacity and organic carbon content a positive relationship.The calculation of gas content in Jiaolai basin shows that:The gas content of different shale shales gradually increases with the increase of burial depth,after then the trend tends to be gentle,and the gas content is mainly between 0.50m3/t-1.80m3/t,among which the gas content of Shuinan shale in Laiyang sag is the highest,the highest is 1.80m3/t,Laiyang sag can be used as the preferred target area for future exploration and development.The results show that organic carbon content and porosity are the two most important factors affecting shale gas content. The higher the organic carbon content, the higher the porosity, the better the gasHowever, the adsorption gas and the gas content of free gas in different burial depth are mainly affected by the temperature and pressure of the formation, and the two are transformed with the temperature and pressure. Under certain buried depth, the adsorption and desorption of the gas in the formation can reach one Balanced state.