中国地质2013，Vol.40Issue(4)：1159-1168,10.
鄂尔多斯盆地吴堡地区延长组长8致密砂岩油藏成藏主控因素
The distribution of Chang-8 tight sandstone oil reservoir of Yanchang Formation in Wubao area, central-south of Ordos Basin
摘要
Abstract
Chang-8 oil-bearing bed of Yanchang Formation was found in recent years in the exploration and development of new Triassic reservoirs in Ordos Basin.Exploration practice has proved that it has good accumulation conditions and favorable exploration potential.With Wubao area in Zhidan County in the central south part of the basin as an example,the authors studied the conditions and distribution regularity of Chang-8reservoir,and the results show that the Chang-8 oil source mainly came from the overlying Chang-73 source rocks,Chang-8 internal hydrocarbon source rocks and Chnag-9 top hydrocarbon source rocks,thus having a good oil-generating and oil-accumulating reservoir configuration.The migration force of main reservoirproducing stage resulted mainly from hydrocarbon generation pressurization and abnormal high pressure,and the injection of oil and gas into Chang-8 tight reservoir was mainly caused by nearly vertical and lateral migration.Diagenesis exacerbated the reservoir heterogeneity and resulted in the formation of diagenetic occlusion type and quasi-continuous type oil gas accumulations.Chang-8 reservoir plane and horizontal distribution are mainly controlled by the effective hydrocarbon source rocks,reservoir quality and the effective cover layer,and hence various geological factors have resulted in the present Chang-8 reservoir distribution pattern.关键词
主控因素/致密砂岩油藏/长8油层组/延长组/吴堡地区/鄂尔多斯盆地Key words
main controlling factor/tight sandstone oil reservoir/Chang-8 member /Yanchang Formation/Wubao area/ Ordos Basin分类
能源科技引用本文复制引用
白玉彬,罗静兰,王少飞,杨勇,唐乐平,付晓燕,郑卉..鄂尔多斯盆地吴堡地区延长组长8致密砂岩油藏成藏主控因素[J].中国地质,2013,40(4):1159-1168,10.基金项目
国家自然科学基金(41272138)、国家重大科技专项(2011ZX05001-002-008,2011ZX05008-004-61)、陕西省教育厅专项科研计划项目(12JK0491)及中国石油科技创新基金项目(2011D-5006-0103)联合资助. （41272138）
