致密砂岩脱附烃气色谱分析及有关问题探讨

A DISCUSSION ON THE ADSORBED, THE ACIDIZED AND THE ADSORBED ACIDIZED HYDROCARBONS ON TIGHT SANDSTONE

本文简要介绍深层致密砂岩吸附烃、酸解烃分析方法，并提出吸附－酸解烃分析方法。认为３种分析方法分别脱附了致密砂岩不同部位吸附的烃气；吸附－酸解烃总烃量远大于酸解烃与吸附烃之和；不同分析方法脱附的烃气具有不同地化特征。

This paper gives an introduction to the method of analysis on the adsorbed and the acidizedhydrocarbons on deep tight sandstone, and a method of analysis on the adsorbed-acidized hydrocarbon is suggested for the first time.By an analysis and discussion on the mechanism ofadsorption of hydrocarbon on rock formations as well as the results of analysis, it is thoughtthat 3 methods mentioned above desorb hydrocarbon adsorbed on various parts in the tightsandstone,and a conclusion that total amount of the adsorbed-acidized hydrocarbon is farlarger than the sum of the adsorbed and the acidized hydrocarbons is reached, and hydrocarbons desorbed by different methods have different geochemical characteristics.