Influence of Organic-Inorganic Composition on the Adsorption of Niutitang Formation Shale in Huijunba Syncline

To study the influence of different organic-inorganic composition on adsorption in shale, taking Niutitang Formation shale Huijunba syncline southern Hanzhong as research object, based acid treatment to extract kerogen and wet chemicals. Extracting mineral components by oxidation method, a series isothermal experiments were carried out original rock, kerogen, samples. Through three-dimensional Langmuir model fitting thermodynamic calculation parameters such isometric heat standard entropy are obtained. The results show that organic matter is primary factor affecting methane clay minerals also affect certain extent. When burial depth relatively shallow, diagenesis has promoting effect total amount adsorption. As increases, will turn into an inhibitory component weighting lower limit ratio adsorbed 29.3%~46.7% when reaches 3000 m, while upper 66.4%~73.6%.