准噶尔盆地腹部石南21油藏、石南31油藏新认识  

New perspective on Shinan 21and Shinan 31 reservoirs in the central Junggar basin

作　　者：杨帆[1] 侯连华[1] 卫延召[1] 崔化娟[1] 杨春[1] 卢山[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《中国矿业大学学报》2015年第4期696-703,共8页Journal of China University of Mining & Technology

基　　金：国家重大专项(2011ZX05001-003)

摘　　要：通过重矿物、黏土矿物分析、地震解释,以及古地貌恢复等方法重新解剖石南21、石南31油藏给腹部中浅层油气勘探提供新思路.研究后认为石南油气田主体为地层油气藏,石南21为单斜削截型地层油气藏,石南31的两套油层分别为J/K不整合面上下的超覆型和侵蚀残丘型地层油气藏,它们均受前白垩系古地貌的控制.腹部前白垩系古地貌表现为"两凸一槽一坡折",其中盆1井西凹陷北环带的坡折带控制了超覆型地层油气藏发育,东侧的3个泉凸起和西侧的达巴松凸起上由于沟谷下切形成的众多残丘型地貌单元,是残丘型地层油气藏发育区.结果表明:按照残丘型地层油气藏新模式,在腹部地区莫索湾凸起北部部署前哨1风险井,钻井证实残丘型地层圈闭模式的存在,并且在侏罗系三工河组获得工业油气流,在白垩系清水河组、侏罗系头屯河组获得丰富的油气显示.Through heavy mineral analysis,clay mineral analysis,seismic interpretation,and pre-Cretaceous paleogeomorphy restoration,the Shinan 21 and Shinan 31 reservoirs were re-examined in order to find new ideas to exploit the central Junggar basin.The results show that the reservoirs in Shinan oil and gas field belong to stratigraphic reservoirs rather than lithologic reservoirs.Shinan 21 reservoir is a monocline truncation stratigraphic reservoir;Shinan 31 reservoir can be classified as the erosive monadnock stratigraphic reservoir and overlap stratigraphic reservoir,both of which are controlled by pre-Cretaceous paleogeomorphy.The preCretaceous paleogeomorphy exhibits a structural framework of＂two uplifts,one trough and one slope break＂.The slope break in the north of Penyijingxi subbasin controls the overlap stratigraphic reservoirs.Uplifts and those monadnocks cut by fluvial system control the truncation stratigraphic reservoirs and erosive monadnock stratigraphic reservoirs.Based on the obtained new ideas of erosive monadnock stratigraphic reservoirs,a new well was drilled in the north of Mosuowan uplift and commercial oil-gas was produced in J1s;meanwhile,a lot of oil and gas shows were obtained in J2 t and K1 q,which testified the correctness of the new pattern.

关 键 词：准噶尔盆地腹部 石南油气田 古地貌 侵蚀残丘 地层油气藏 

分 类 号：TE122[石油与天然气工程—油气勘探]