摘要
运移相态是运移特征的主要标志。排烃量和聚集量也只有依据一定的运移相态才能计算。天然气在地下主要呈什么相态运移,决定于地下的温度、压力、生烃量、孔隙度、溶解度以及岩石的组构等条件,而这些条件又随埋深而变化,因此运移相态在剖面上有纵向演变的规律。数值模拟是当前天然气运移定量研究的唯一手段。排气量的模拟要根据天然气运移相态的演变,首先确定地下各种运移相态的深度界限,然后分别计算再累加起来。本文结合实例,着重介绍了模拟天然气排气量的方法。
Migration phase state is the main mark of the character of migration. Based on the migration phase state the amount of hydrocarbon masses,expell- ed and accumulated,can be calculated.The subsurface,phase state of the natual gas is determined by temperature,pressure,source materials,porosity of the rock formation of the gas in oil and water solubility,and the composi- tion and construction of rocks,etc.all of them changing with depth of burial. Therefore,the migration phase state displays a vertical evolution on a pro- file. Up to now,numerical modelling is a unique method to study the migra- tion of the natural gas quantitatively.Gas expelling model must be related to the evolution of the migration phase state.At first,the depth ranges of the migration phase state are determind,and then the expelled gas in each range are computed and added together.In this paper,the method to model gas expelling has been presented in detail mainly by giving the cases of explora- tion ares.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期1-11,21,共12页
Petroleum Exploration and Development
