摘要
陕甘宁盆地中部气田的主要储气层段为奥陶系马五段的古岩溶层。该区有两个岩溶旋回期，相应形成了两个岩溶层：第１岩溶层（即马五１１～３储渗体）分布在靖边古潜台的高部位，是陕甘宁盆地中部大气田的主力气层；第Ⅰ岩溶层（即马五１１顶部储渗体）主要分布在城川岩溶平台和靖边古潜台内的侵蚀谷（窗）附近，为局部发育的储气层。
At the end of Ordovician Period,a differential elevation occurred in the central Shanganning Basin due to the Caledonian Movement.This elevation resulted in a widespread sedimentary gap and long-time weathering and leaching,and developed vugular-solution pores and fractures in the top of Ordovician system.There are two palaeokarst layers in the study area.The first situated at the top of the Mawu member,it is the master reservior of the gas-field.The second in the top of Mawu-4 reservior occurred near the incised valley,it is a local reservior of the gas-field.
出处
《江汉石油学院学报》
CSCD
北大核心
1995年第2期10-14,25,共6页
Journal of Jianghan Petroleum Institute
基金
国家"八五"重点攻关项目
关键词
岩溶油气藏
储集层
早奥陶世
气田
含气性
karst reservoir
reservoir
karst
early Ordovician
Eerduosi basin
