%0 Journal Article
%T Cap Rock Characteristics of Medium and Large Gas Fields in China<br>中国大中型气田盖层特征
%A HU Guo-yi
%A WANG Xiao-bo
%A WANG Yi-feng
%A TAO Xiao-wan
%A NI Yun-yan
%A YANG Chun
%A <br>胡国艺
%A 汪晓波
%A 王义凤
%A 陶小晚
%A 倪云燕
%A 杨春
%J 天然气地球科学
%D 2009
%I 
%X Based on the statistics of cap rock parameters of medium\| and large\|size gas fields in China, the qualitative and quantitative evaluations of the cap rock sealing capacity have been studied. The cap rock lithology of most medium and large gas fields is mudstone and the thickness of the cap rocks ranges from 50m to 350m. The displacement pressure of the cap rocks is high and ranges from 10MPa to 30MPa. The diffusion coefficient of the medium and large gas fields is generally less than 10-6cm2/s. The cap rock condition of the gas field with lithological traps is weaker than that with structural traps in the aspect of thickness and displacement pressure.
%K Medium-and large-size gas fields/ Cap rock/Displacement pressure/Diffusion coefficient/Lithological gas fieldzz<br>大中型气田
%K 盖层
%K 排替压力
%K 扩散系数
%K 岩性气田
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=E8CFCA71B77A2FF3&jid=ACDC74B90F609E2435847898490F3647&aid=5CBCD312BC1F3431C772C910096B17B7&yid=DE12191FBD62783C&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=F1177A9DF1349B63&eid=43608FD2E15CD61B&journal_id=1672-1926&journal_name=天然气地球科学&referenced_num=4&reference_num=22