本文關(guān)鍵詞： 頁巖氣 成藏條件 有利區(qū)篩選 山西組 鄂爾多斯盆地東部　出處：《地質(zhì)學報》2016年01期 　論文類型：期刊論文

【摘要】：鄂爾多斯盆地東部榆106井區(qū)山西組頁巖沉積在三角洲平原分流河道間沼澤、天然堤、決口扇遠端與洼地環(huán)境。根據(jù)有機地球化學、物性、含氣性、巖性實驗分析,結(jié)合鉆井、錄井、測井資料與沉積相研究,開展了該區(qū)山西組頁巖氣成藏條件與有利區(qū)分布研究。山西組頁巖有機碳含量較高,山二段平均5.28%,山一段平均3.02%,有機質(zhì)類型以Ⅱ_2、Ⅲ型干酪根為主,有機質(zhì)成熟度較高,R_o平均1.89%,生氣條件優(yōu)越。頁巖孔隙度平均1.7%,滲透率平均0.0415×10~(-3)μm~2,平均含氣量0.64 m~3/t,頁巖單層厚度小,垂向上普遍與致密砂巖、煤層組成互層,累計厚度較大(平均達75 m),頁巖滲透性較好而儲集性能稍差。頁巖脆性礦物含量平均49.9%,黏土礦物含量平均50.1%,黏土礦物含量較高,資源豐度普遍較低,但是頁巖埋深小于3000 m,試氣產(chǎn)能較高(0.64×10~4m~3/d),商業(yè)開發(fā)潛力較好。山二段有機質(zhì)含量比山一段更高,含氣性比山一段更好。主要基于頁巖厚度與沉積相展布預測的山二段頁巖氣有利區(qū)呈北東向、南北向條帶狀展布,受分流河道間沼澤微相的控制。
[Abstract]:The shales of Shanxi formation of Yu106 well area in the eastern Ordos Basin are deposited in the swamp, natural dike, far end of crevasse fan and depression environment in delta plain distributary channel. According to organic geochemistry, physical property, gas content. The lithologic experimental analysis, combined with drilling, logging, logging data and sedimentary facies, has been carried out to study the formation conditions of shale gas in Shanxi formation and the distribution of favorable area. The shale organic carbon content of Shanxi formation is relatively high. The average value of the second member of the mountain is 5.28, the average of the first member of the mountain is 3.02, the type of organic matter is mainly type 鈪，

本文編號：1492107