Controls on the Enrichment of Oil Pools in Qingxi Sag,Jiuxi Basin

YANG Zhi ming; WANG Qi; SHI Ji an; LI Man ru; WANG Lei

A series of Cretaceous lacustrine mudstone, shale, dolomitic mudstone and argillaceous dolostone comprises the main source rocks of Qing xi Sag in the study area.During deposition, the Qingxi Sag was a closed to semi-closed rift basin with strong reducing conditions that was favorable for the preservation and transformation of organic matter.In addition, the thickness of the source rock is very great with the ratio of source rock to st rata over 50%, together with mixing organic types, high content of organic carbon (>1%), which all provided the important material basis for oil pool formation.Himalayan tectonic movement formed lots of compressional reverse faults, shears faults and structural fissures, and resulted instrata and st ructure overstacking to provide impetus and space for organic matter maturity, migration and accumulation of petroleum.

1. Research Institute of Yumen Branch,CNPC,Yumen Gansu 735200;

2. State Key Laboratory of Gas Geochemistry, Lanzhou Institute of Geology,CAS, Lanzhou 730000

Received Date: 2003-04-30

Publish Date: 2003-12-10

Key words:

Abstract: A series of Cretaceous lacustrine mudstone, shale, dolomitic mudstone and argillaceous dolostone comprises the main source rocks of Qing xi Sag in the study area.During deposition, the Qingxi Sag was a closed to semi-closed rift basin with strong reducing conditions that was favorable for the preservation and transformation of organic matter.In addition, the thickness of the source rock is very great with the ratio of source rock to st rata over 50%, together with mixing organic types, high content of organic carbon (>1%), which all provided the important material basis for oil pool formation.Himalayan tectonic movement formed lots of compressional reverse faults, shears faults and structural fissures, and resulted instrata and st ructure overstacking to provide impetus and space for organic matter maturity, migration and accumulation of petroleum.

HTML

Reference (9)

[1]	陈建平,陈建军,张立平,等.酒西盆地油气形成与勘探方向新认识(一)--基本石油地质条件及生油潜力[J].石油勘探与开发,2001,28(1 ): 19～22[Chen Jianping, Chen Jianjun, Zhang Liping, et al . New cognitions on oil & gas formation and exploration direction in Jiuxi Basin(1)--Basic petroleum geology and oil generation potential[J]. Petroleum Exploration and Development,2001, 28(1 ): 19～22]
[2]	熊英,程克明.中性含氮化合物在酒西盆地石油运移研究中的应用[J].石油勘探与开发,1999,26(5): 27～29[Xiong Ying, Cheng Keming. Application of neutral nitrogen-bearing compound on oil migration in Jiuxi Basin[J]. Petroleum Exploration and Development,1999, 26(5): 27～29]
[3]	苏建平,吴保祥,雷怀彦,等.甘肃酒西白垩纪盆地沉积构成及盆地演化动力学分析[J].沉积学报,2002, 20(4): 568～573[Su Jianpin, Wu Baoxiang, Lei Huaiyan, et al. The sedimentary formation and analyses for dynamic evolution of Jiuxi Cretaceous basin, Gansu Province[J]. Acta Sedimentologica Sinica, 2002, 20 (4): 568～573]
[4]	陈建平,赵文智,黄第藩,等.酒东、酒西盆地的异同与油气勘探[J]. 石油勘探与开发,1997,24(6): 12～16[Chen Jianping, Zhao Wenzhi, Huang Difan, et al. Comparison between Jiuxi and Jiudong basin and oil & gas exploration[J]. Petroleum Exploration and Development, 1997, 24(6): 12～16]
[5]	赵应成. 酒西盆地含油气系统与油气勘探方向[J]. 石油实验地质, 1998,20(4): 362～367[Zhao Yingcheng. Petroleum system and petroleum exploration targets of the Jiuxi Basin[J]. Petroleum Geology and Experiment,1998, 20(4): 362～367]
[6]	陈建平,陈建军,张立平,等.酒西盆地油气形成与勘探方向新认识(二)--烃源岩成烃演化与主力油源确认[J].石油勘探与开发,2001,28(2): 15～18[Chen Jianping, Chen Jianjun, Zhang Liping, et al . New cognitions on oil & gas formation and exploration direction in Jiuxi Basin(2)--Hydrocarbon-forming evolution and main oil source determination[J]. Petroleum Exploration and Development,2001, 28(19): 15～18]
[7]	陈建平,陈建军,张立平,等.酒西盆地油气形成与勘探方向新认识(三)--油气运移、成藏规律与勘探方向[J]. 石油勘探与开发,2001,28(3): 12～16[Chen Jianping, Chen Jianjun, Zhang Liping, et al . New cognitions on oil & gas formation and exploration direction in Jiuxi Basin(3)--Hydrocarbon migration, formation and exploration direction[J]. Petroleum Exploration and Development,2001, 28(3): 12～16]
[8]	李相博,王新民,袁剑英,等.青藏高原东北部旋卷(扭)构造变形遥感探测及其地球动力学与油气地质意义[J]. 沉积学报,2001,19(3):433～439[Li Xiangbo, Wang Xinmin, Yuan Jianying, et al . Remote sensing findings of vortex structure deformation in the northwest of Qinghai-Tibet plateau and its significance of geodynamics and oil & gas geology[J]. Acta Sedimentologica Sinica, 2001, 19(3):433～439]
[9]	李相博,郭彦如,王新民,等.酒泉盆地南缘推覆构造特征及油气勘探方向[J]. 新疆石油地质,2002,23(4):299～301[Li Xiangbo, Guo yanru, Wang Xinmin, et al . Characteristics of nappe structure in the southern margin of Jiuquan basin and petroleum exploration direction[J]. Xinjiang Petroleum Geology, 2002, 23(4):299～301]

Controls on the Enrichment of Oil Pools in Qingxi Sag,Jiuxi Basin

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related