本文關鍵詞： 灰色理論 排替壓力 孔隙度 滲透率 山西組 鄂爾多斯盆地東南部　出處：《吉林大學學報(地球科學版)》2017年04期 　論文類型：期刊論文

【摘要】：為彌補鄂爾多斯盆地東南部蓋層的研究空白,借鑒已有研究成果與蓋層基本特征,選取泥巖孔隙度、滲透率、厚度以及排替壓力4個參數(shù),結合灰色理論分析方法,對鄂爾多斯盆地東南部山西組泥巖蓋層封蓋性能進行了綜合定量評價。結果表明:盆地東南部泥巖北東部較厚,整體呈從北向南減薄的趨勢,南部孔隙度及滲透率均偏高;泥巖蓋層排替壓力較大,大于8 MPa的平面面積占70%以上;由灰色理論打分評價可知,山西組整體蓋層封蓋性能較好,封蓋能力特強(Ⅰ類蓋層)、封蓋能力強(Ⅱ類蓋層)的蓋層分布區(qū)域廣泛,Ⅰ類和Ⅱ類蓋層主要發(fā)育于盆地北部、北東部,中部延長、延安、志丹等周邊地區(qū),蓋層封蓋性好,Ⅲ類蓋層(封蓋能力中等)、Ⅳ類蓋層(封蓋能力差)主要發(fā)育于南部。蓋層發(fā)育較好的地區(qū),經(jīng)勘探開發(fā)與試氣,單井日產(chǎn)量可達上萬方,證明評價結果與勘探實踐匹配。
[Abstract]:In order to make up for the blank in the study of caprock in the southeast of Ordos Basin, with reference to the existing research results and the basic characteristics of caprock, four parameters of mudstone porosity, permeability, thickness and displacement pressure are selected, and the grey theory analysis method is combined. The comprehensive quantitative evaluation of the seal property of the mudstone caprock of Shanxi formation in the southeast of Ordos Basin is carried out. The results show that the mudstone in the southeastern part of the basin is thicker in the north and east, the whole is thinning from north to south, and the porosity and permeability in the south are higher. The displacement pressure of mudstone caprock is larger than 8 MPa, the plane area is more than 70%, and the evaluation of grey theory indicates that the seal performance of the whole cap bed of Shanxi formation is better. The caprocks with strong capping ability (type 鈪，

本文編號：1508856