Abstract：Good oil and gas shows are discovered in the exploration of oil-bearing layers C-8 and C-9 in Yanchang Formation, Pingbei area. Combining the data of well logging, geological logging, drill core and chemical analysis, a comprehensive study is conducted on the petrological, paleontological and geophysical characteristics of C-8 and C-9. The results show that the lacustrine-delta depositional systems, mainly delta front facies and shore-shallow lacustrine or prodelta sedimentary facies, are developed in the Pingbei area during the sedimentary period of C-8 and C-9, which can be subdivided into underwater distributary channel, underwater distributary interchannel, distant sandbar, shore-shallow lacustrine mudstone and prodelta mudstone microfacies. Among the facies above, the sand body of underwater distributary channel is relatively developed, serving as the main oil-gas accumulation place.
董丽红, 李欣伟, 杜彦军, 时晓章, 马浪. 鄂尔多斯盆地坪北地区延长组长8、长9油层沉积特征研究[J]. 地质与资源, 2017, 26(6): 577-582,595.
DONG Li-hong, LI Xin-wei, DU Yan-jun, SHI Xiao-zhang, MA Lang. STUDY ON THE SEDIMENTARY CHARACTERISTICS OF THE OIL-BEARING LAYERS C-8 AND C-9 OF YANCHANG FORMATION IN PINGBEI AREA, ORDOS BASIN. GEOLOGY AND RESOURCES, 2017, 26(6): 577-582,595.
2017, Vol. 26 
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