准噶尔盆地西北缘乌尔禾组时代归属及层位关系

Stratigraphic Sequence and Horizon Relationship of Permian Wuerhe Formation in Northwestern Margin of Junggar Basin

多年来,克拉玛依中拐地区与玛湖西斜坡区的二叠系乌尔禾组时代归属及层位关系一直存有争议,直至20世纪80年代中期至90年代初期,中拐地区的克79井和玛湖地区的玛2井相继在二叠系乌尔禾组获得中、高产工业油气流后,又引起了广大地质工作者对此问题的关注。近年来,随着斜坡区勘探工作的不断深入,满覆盖三维地震资料已连成片。利用钻井、古生物资料结合地震资料,进行了深入细致的综合研究。确定了准噶尔盆地西北缘中拐地区和玛湖地区二叠系乌尔禾组的时代归属及层位关系,确认中拐地区乌尔禾组为上二叠统上乌禾组,玛湖斜坡区为中二叠统下乌尔禾组。

Researchers have been confused by stratigraphic sequence and horizon relationship of Permian Wuerhe formation in Zhongguai-5-8 Zone and slope of west of Mahu sag for years.Until the mid 1980s and early 1990s,Ke-79 well in Zhongguai are and Ma-2 well in Mahu sag got mid-high yield commercial oil and gas flow in Permian Wuerhe formation one after another.Many geologic researchers attach importance to such a problem.With the development of further 3-D seismic data joining processing and further exploration in slope of Mahu sag,research has been done thoroughly and meticulously in recent years,by using drilling and biological data combining with seismic interpretation.It is confirmed that the Wuerhe formation belongs to the Upper Wuerhe formation of Upper Permian in Zhongguai-5-8 Zone and the Lower Wuerhe formation of Middle Permian in slope of Mahu sag.