Sedimentary evolution model and petroleum significance of Chang-7 member turbidite,Ordos Basin

  • GAO Changhai ,
  • ZHA Ming
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  • 1. School of Petroleum Resources, Xi’an Petroleum University, Xi’an 710065, China; 2. Geological Department, State Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, China; 3. Changqing Oilfield Branch Company, PetroChina,Xi’an 7100021, China; 4. Geological Research Institute of Shengli Oilfield Co.Ltd., Sinopec, Dongying 257015, China

Online published: 2009-12-16

Abstract

The extensive extent turbidite can be identified by such apparent signatures as lithology, sedimentary structure, sedimentary sequence and well logs ofChang-7 member deep lake, Ordos Basin. During the paleo-geographic evolution of Chang-7 member, lake basin and deep lake are both at their maximum extent during Chang-73 stage, and turbidite was distributed fragmental-like in plane view, due to interplay of extensive extent deep lake and limited clastic supplying. Deep lake line was graduallymoved toward lake center and turbidite sand bodies were gradually developed better from stages of Chang-73, Chang-72 and Chang-71. And depositional evolution model in study area is established. There is better petroleum accumulation in deep lake, and turbidite sandstone can be better reservoir in deep lake. At present, some commercial oil wells were found in Southwest Ordos Basin and the turbidite sandstones can be the main exploration targets in the near future.

Cite this article

GAO Changhai , ZHA Ming . Sedimentary evolution model and petroleum significance of Chang-7 member turbidite,Ordos Basin[J]. Lithologic Reservoirs, 2009 , 21(4) : 73 -77 . DOI: 10.3969/j.issn.1673-8926.2009.04.014

References

[1] 杨俊杰,李克勤,张东生.中国石油地质志(卷十二)[M].北京:石油工业出版社,1992:1-9.
[2] 汤锡元,郭忠铭,陈荷立.陕甘宁盆地西缘逆冲推覆构造及油气勘探[M].西安:西北大学出版社,1992:1-13,67-99.
[3] 何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003:390.
[4] 曲春霞,杨秋莲,刘登飞,等.长庆油田延长组特低渗透储层物性影响因素分析[J].岩性油气藏,2008,20(2):43-47.
[5] 毛明陆,李元昊,刘联群,等.鄂尔多斯盆地晚三叠世湖盆沉积演化与层序地层特征[J].西北大学学报(自然科学版),2006,36(专辑):52-59.
[6] 杨华,张文正.论鄂尔多斯盆地长7 段优质油源岩在低渗透油气成藏富集中的主导作用:地质地球化学特征[J].地球化学,2005,34(2):147-154.
[7] 陈全红,李文厚,郭艳琴,等.鄂尔多斯盆地南部延长组浊积岩体系及油气勘探意义[J].地质学报,2008,37(5):59-64.
[8] 夏青松,田景春.鄂尔多斯盆地西南部上三叠统长6 油层组湖底扇特征[J].古地理学报,2007,9(1):33-43.
[9] 赵俊兴,李凤杰,申晓莉,等.鄂尔多斯盆地南部长6 和长7 油层浊流事件的沉积特征及发育模式[J].石油学报, 2008,29(3):389-394.
[10] 赵俊兴,陈洪德,付锁堂,等.鄂尔多斯盆地南部延长组中几个重要事件沉积及其油气聚集关系[J]. 矿物岩石,2008,28(3):90-95.
[11] 傅强,吕苗苗,刘永斗.鄂尔多斯盆地晚三叠世湖盆浊积岩发育特征及地质意义[J].沉积学报,2008,26(2):186-192.
[12] 李文厚,邵磊,魏红红,等.西北地区湖相浊流沉积[J].西北大学学报(自然科学版),2001,31(1):57-62.
[13] 鄢继华,陈世悦,宋国奇,等.三角洲前缘滑塌浊积扇形成过程初探[J].沉积学报,2004,22(4):573-578.
[14] 杨华,刘显阳,张才利,等.鄂尔多斯盆地三叠系延长组低渗透岩性油藏主控因素及其分布规律[J].岩性油气藏,2007,19(3):1-6.
[15] 毛明陆,杨亚娟,张艳.试论鄂尔多斯盆地三叠系岩性油藏分析的几项地质关键技术[J]. 岩性油气藏,2007,19(4):27-33.
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