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采用超临界抽提（ＳＦＥ）新技术和氯仿抽提（ＣＥ）以及粘土分离等手段对东营凹陷沙四段低熟油烃源岩进行不同处理，得到３种粘土样品：（１）含有机质的粘土原样；（２）氯仿抽提去有机质的样品；（３）不同实验条件下超临界抽提后的样品。然后，分别对这３种粘土样品进行Ｘ射线衍射分析（ＸＲＤ）和傅利叶转换红外光谱分析（ＦＴ－ＩＲ）。研究发现烃源岩中可溶有机质除了吸附于矿物表面外，还吸附于粘土矿物尤其是蒙皂石层的层间，后者主要为碳数相对较低的饱和烃类。这一发现对认识沉积岩中可溶有机质对粘土矿物结构和特性的影响有着重要意义，对烃源岩评价和探讨泥质烃源岩烃类的初次运移提供了新思路
Three kinds of clay samples were obtained from different treatments of low maturity oil source rocks in the fourth member of Shahejie Formation in Dongying Depression by means of new supercritical fluid extraction (SFE), chloroform extraction (CE) and clay separation. (1) Clay as it is; (2) chloroform extraction of organic matter; and (3) samples after supercritical extraction under different experimental conditions. Then, the three clay samples were respectively analyzed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). It is found that the soluble organic matter in the source rocks adsorbed on the surface of minerals in addition to the clay minerals, especially smectite layers, the latter mainly saturated hydrocarbons with relatively low carbon number. This finding is of great significance for understanding the effect of dissolved organic matter in sedimentary rocks on the structure and characteristics of clay minerals. It provides a new idea for the evaluation of source rocks and exploration of the initial migration of hydrocarbons from muddy source rocks