Characteristics and Influential Factors of Low-GanchaigouFormation Reservoir in North Edge of Qaidam Basin
Received date: 2008-11-02
Revised date: 2008-12-07
Online published: 2009-02-10
By means of detailed study about the lithology, pore type, physical property and diagenesis of Paleogene Low Ganchaigou Formation reservoir in the north edge of Qaidam Basin, this paper confirms that Low-Ganchaigou Formation reservoir sandstones consist of arkose, lithic arkose and arkose rock fragment sandstone, and the cement is carbonates. The reservoir sandstones have low compositional maturity and medium textural maturity. The development extent of pore and the accumulation property have apparent deviation in different tectonic belts. Both the development extent of pore and the accumulation property in Mahai-Nanbaxiang area are best, and produced mainly primary intergranular pores. The reservoir has high porosity and middle permeability. The development extent of pore is very good to good and the accumulation property is good in Lenghu tectonic belt, and produced mainly primary intergranular pores. The reservoir has mid-low porosity and mid\|ow permeability. Reservoir porosity and accumulation property are relatively very poor in Eboliang tectonic belt, and merely has a few relict intergranular pores and secondary solution pores, and the reservoir has extremely low porosity and extremely low permeability. The rock component of sandstone reservoir and diagenesis are the main factors which control the reservoir property of Paleogene in the north edge of Qaidam Basin. The diagenesis mainly contains compaction and cementation. Carbonate cementation and clay encrustation have constructive and devastating effects to reservoir property.
LI Feng-Jie, LIU Qi, LIU Dian-He, QI Wen-Zhen . Characteristics and Influential Factors of Low-GanchaigouFormation Reservoir in North Edge of Qaidam Basin[J]. Natural Gas Geoscience, 2009 , 20(1) : 44 -49 . DOI: 10.11764/j.issn.1672-1926.2009.01.44
[1] 高云峰,彭苏萍,何宏,等. 柴达木盆地北缘第三系碎屑岩储集层特征及评价[J]. 石油勘探与开发,2003,30(4):40 -42.
[2] 杨明林,尹太举,易红霞,等. 柴达木盆地北缘马海构造第三系储层发育特征[J]. 内蒙古石油化工,2006,(10):136 -137.
[3] 王鹏,赵澄林. 柴达木盆地北缘地区第三系成岩作用研究[J]. 西安石油学院学报:自然科学版,2002,17(4):1 -4.
[4] 袁剑英,陈启林,陈迎宾,等. 柴达木盆地油气地质特征与有利勘探领域[J]. 天然气地球科学,2006,17(5): 640 -644.
[5] 王琪,白斌,李小燕,等. 柴达木盆地北缘深部碎屑岩储层成岩演化特征研究——以昆特依凹陷昆2井为例[J]. 天然气地球科学,2008,19(2):157 -164.
[6] 史基安,王金鹏,毛明陆,等.鄂尔多斯盆地西峰油田三叠系延长组长6 -8段储层砂岩成岩作用研究[J]. 沉积学报,2003,21(3):372 -380.
[7] 李凤杰,王多云,徐旭辉. 鄂尔多斯盆地陇东地区三叠系延长组储层特征及影响因素分析[J]. 石油实验地质,2005,27(4):365 -370.
[8] 黄思静,谢连文,张萌,等. 中国三叠系陆相砂岩中自生绿泥石的形成机制及其与储层孔隙保存的关系[J]. 成都理工大学学报:自然科学版,2004,31(3):273 -282.
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