High standard and strict requirement for bulk sealing off system have been determined by nature of easily loss of natural gas.

The relationship of fluid compartment and gas reservoir forming in the west of Sichuan Basin;

Division of fluid compartments and the formation and evolution of oil and gas accumulation in the typical structures of Western Hubei-Eastern Chongqing area,China

According to the vertical characteristics of the formation water chemic and dynamical belts and the relations with fluid compartment and distribution of oil and gas in Gu'an-Jiuzhou,Liuquan-Caojiawu and Hexiwu tectonic belts,it is considered that formation water can be divided into four belts vertically.

Law Principle & Alignment of the Law System: With Clue of the Contrast of Close System & Open System;

This paper studied the thermodynamic function formula of composing comstant of close system using the mathematics analytic method,for establishing the foundation of research the relationship better among the thermodynamic parameters as well as supplying some method and thinking way of physical chemistry teaching.

The petroleum generation pattern of the late Paleozoic source rock from the Huimin Depression has been simulated using a golden tube-high pressure stove in a closing system in this paper.