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鄂尔多斯盆地奥陶系古岩溶地貌及天然气富集特征
石油与天然气地质
1999年 20卷 第No.2期
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Title
ORDOVICIAN PALAEOKARST LANDFORM IN ORDOS BASIN AND GAS ENRICHMENT CHARACTERISTICS
作者
夏日元
唐健生
关碧珠
罗伟权
马振芳
周树勋
于忠平
潘令红
Authors
Xia Riyuan
Tang Jiansheng
Guan Bizhu
Luo Weiquan
Ma Zhenfang
Zhou Shuxun
Yu Zhongping
Pan Linghong
摘要
鄂尔多斯盆地中东部奥陶系风化壳古岩溶地貌形态对天然气储集起着控制作用,划分为岩溶高地、岩溶台地、岩溶盆地3种二级和9种次一级(三级)类型。岩溶台地的岩溶作用最强烈,是天然气富集的最有利地区;岩溶高地中的平台、岩溶台地中的缓丘、岩溶盆地中的残丘层状岩溶比较发育,主力气层保存完整,是天然气富集的有利地区;岩溶高地与岩溶台地接触部位,为水动力转换带,天然气比较富集。沟槽两侧上方的斜坡地带是高产气井的有利分布区。
Abstract
Palaeokarst landform developed in the top of Ordovician weathering crust in mideast Ordos Basin controls the reservoiring of natural gas and could be divided into 3 types such as karst highland,karst platform,karst basin and 9 sub types. The karst platform that underwent intense karstification is most favourable for gas enrichment;the terrace in the highland,the gentle hill in the platform and the remnant hill in karst basin are favorable areas of gas accumulation.High yield gas wells are located at the upper part of the slopes in both sides of the eroded karst flute.
关键词：
古岩溶地貌;
天然气富集;
风化壳;
鄂尔多斯盆地;
Keywords:
palaeokarst landform;
gas enrichment;
weathered crust;
Ordos Basin;
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