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鄂爾多斯盆地東緣構(gòu)造

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  本文關(guān)鍵詞:鄂爾多斯盆地東緣構(gòu)造-水文地質(zhì)控氣特征,由筆耕文化傳播整理發(fā)布。


山西煤層氣

2012 年 9 月,第 18 卷,第 3 期,438-446頁September 2012,Vol. 18, No.3, p. 438-446高  校 地 質(zhì) 學(xué) 報

Geological Journal of China Universities

鄂爾多斯盆地東緣構(gòu)造-水文地質(zhì)控氣特征

姜 波,,許進(jìn)鵬,朱 奎,汪吉林,王繼堯,屈爭輝,李 明

中國礦業(yè)大學(xué) 資源與地球科學(xué)學(xué)院,煤層氣資源與成藏過程教育部重點實驗室,徐州 221116

摘要:基于大量野外地質(zhì)工作,結(jié)合鉆孔抽水試驗資料分析,探討了鄂爾多斯盆地東緣構(gòu)造、水文地質(zhì)條件及其對煤層氣保存的控制特征。結(jié)果顯示,盆地邊界近NS向的壓性斷裂和褶皺構(gòu)造發(fā)育,構(gòu)造變形程度向盆地內(nèi)部逐漸減弱,即盆地邊緣和內(nèi)部的構(gòu)造條件均有利于煤層氣保存。依據(jù)構(gòu)造、地下水補(bǔ)給及排泄條件和地貌等特征,研究區(qū)可劃分為5個水文地質(zhì)單元,西南部韓城單元的水動力條件強(qiáng)于東部各水文地質(zhì)單元,東部各單元中又以柳林泉流域水動力條件最強(qiáng),這種差異在構(gòu)造背景上的疊加,導(dǎo)致煤層氣保存條件發(fā)生分異。中部黃河?xùn)|斷凹單元煤層含氣量隨埋藏深度的加深而增高,北部柳林單元在柳林泉以西發(fā)育有利煤層氣保存的地下水動力場條件,中南部龍門山單元北部的地下水動力條件可能有利于煤層氣保存,西南部韓城單元西北段地下水處于滯流環(huán)境而使煤層氣保存條件較好。關(guān)鍵詞:鄂爾多斯盆地;煤層氣;構(gòu)造;水文

中圖分類號:P542;P641.461       文獻(xiàn)標(biāo)識碼:A       文章編號: 1006-7493(2012)03-0438-09

Structural and Hydrogeological Controls of Coalbed Methane Preservation

in the Eastern Ordos Basin

JIANG Bo, XU Jinpeng, ZHU Kui, WANG Jilin, WANG Jiyao, QU Zhenghui, LI Ming

School of Resource and Earth Science, China University of Mining and Technology, and Key Laboratory of Coalbed Methane

Resource and Reservoir Formation Process (CUMT), Ministry of Education, Xuzhou 221116, China

Abstract: Based on field investigation and data of borehole pumping test, the structure, hydrogeology and their controls to the coalbed methane (CBM) preservation in eastern margin of the Ordos basin were discussed. Results showed that the compression faults and folds with nearly south-north direction develop well in the basin margins, and the tectonic deformation weaken gradually towards the center of the basin, which indicates the structure both in the margin and center of the basin is all conducive to the CBM preservation. Five hydrological units in the area were distinguished based on the geomorphological and geological conditions such as the structure and groundwater recharge and discharge. Hydrodynamic in southwestern Hancheng unit is stronger than that in other units in the eastern, and that in the Liulin unit is strongest among the eastern units. Superposition of the hydrodynamic variation on the tectonic setting makes the differentiation of CBM preservation conditions. CBM content in middle Yellow River depression increases with the increase of the burial depth. Hydrodynamic favorable to CBM preservation in northern Liulin unit occurs at the western part of the Liulin Spring in the unit. Groundwater dynamic at the northern part of the Longmenshan unit may be favorable to CBM preservation. Good CBM preservation occurs in the northwest part of the Hancheng unit due to the stagnant groundwater.

Key words: Ordos Basin; coalbed methane; structure; hydrologyFirst author: JIANG Bo, Professor; E-mail: jiangbo@

收稿日期:2011-03-11;修回日期:2012-04-26

基金項目: 國家科技重大專項(2008ZX05034)資助項目

作者簡介:姜波,男,1957年生,博士,教授,主要從事構(gòu)造地質(zhì)和能源地質(zhì)等領(lǐng)域的研究工作;E-mail:jiangbo@


  本文關(guān)鍵詞:鄂爾多斯盆地東緣構(gòu)造-水文地質(zhì)控氣特征,由筆耕文化傳播整理發(fā)布。



本文編號:97531

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