鄂尔多斯盆地延长组长6期湖盆中部砂体发育特征-地球科学与环境学报.PDF

31 1 Vol.31 No.1 2009 3 Journal of Earth Sciences and Environment Mar.2009 6 惠　潇, 张海峰 ( , 710021) :6 、, 。 6 、, 、、 , 6 。 、, , 。 :;;6 ;; :T E 12 1.1;P618.13　:A 　:1672-656 1(2009)0 1-0053-05 Characters of Sand Bodies in Chang 6 Section of Yanchang Formation in the Central Lake Basin of Ordos Basin HUI Xiao, ZHA NG Hai-feng (Exp loration and Develop ment Research Institute of Changqing Oilf ield Company , China National Petroleum Corp oration, X i an 710021, Shaanx i, China) Abstract:By source analy sis and researches on the sedimentary characteristics, the formation mechanism and types of the thick sand bodies in Chang 6 period in central lake basin of Ordos basin is studied.The source of sand bodies is situated in the northeast and the southw est w here the sedimentary facies include submerged distributary channel, mouth bar, distal bar and turbidite.The thick sand bodies developed in the early Chang 6 period w hen the lake basin transformed from raise to fall.Baibao and Heshui areas are the favorable zones for oil e ploration due to the features of great sandstone thickness. Key words:Ordos basin;Y anchang formation;Chang 6 period;the central lake basin;cause of sand bodies formation ( 1), 7 30 ～ 0 　 40 m, (ungchania houae.T .aurita)、、 , — — 、— — , — [ 1-4] 。 。 10 , 1 000 ～ 1 200 m, 7 , , — , 、, 8 3 4×10 t, 4 2 10 × 10 km , [5-6] 。 、。 , — — 6 　:2008-04-20 　:(060106) 　:　(1974-), , , , , 。 E-mail:h cq @ 54