塔河地区卡拉沙依组小层划分、连通性及油藏类型
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摘要
塔河油田石炭系卡拉沙依组油层主要分布在卡三段和卡四段的砂泥岩互层中,根据钙质含量引起的电阻率和自然伽马测井曲线变化和旋回特征将卡三、四段进一步自上而下分为Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ油组。各油组厚度一般在80～100m之间,油组界线在连井地震剖面上均标定在同一个同相轴上,因而具等时性。油气层的较薄的单层厚度(2～5m)和河道微相类型决定了其在横向上多为不连通的透镜状砂体。油气藏类型多为受构造圈闭和透镜状砂体分布以及连通寒武奥陶系烃源岩的断层的共同控制。
The oil layers in the Carboniferous Kalashayi Formation (K) in the Tahe oilfield mainly occur in the interbedded sandstones and mudstones of K3 and K4 members. Based on the variability and cyclicity of resistivity and Gamma ray logs caused by calcareous contents in mudstones,K3 and K4 members were subdivided,from top to bottom,into five reservoir units:Ⅰ,Ⅱ,Ⅲ,Ⅳ and Ⅴ.The thickness of each unit ranges from 80 m to 100 m and the boundaries of each unit were calibrated to the same event on well-tie seismic profile,thus being isochronal.Most of the oil and gas layers appear laterally as separated lenticular sandbodies for their thin single layer(2～5 m)and channel microfacies.The pools are mainly controlled by structural traps,distribution of lenticular sandbodies and faults seated in the Cambrian and Ordovician source rocks.
The oil layers in the Carboniferous Kalashayi Formation (K) in the Tahe oilfield mainly occur in the interbedded sandstones and mudstones of K3 and K4 members. Based on the variability and cyclicity of resistivity and Gamma ray logs caused by calcareous contents in mudstones,K3 and K4 members were subdivided,from top to bottom,into five reservoir units:Ⅰ,Ⅱ,Ⅲ,Ⅳ and Ⅴ.The thickness of each unit ranges from 80 m to 100 m and the boundaries of each unit were calibrated to the same event on well-tie seismic profile,thus being isochronal.Most of the oil and gas layers appear laterally as separated lenticular sandbodies for their thin single layer(2～5 m)and channel microfacies.The pools are mainly controlled by structural traps,distribution of lenticular sandbodies and faults seated in the Cambrian and Ordovician source rocks.
引文
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[2]罗孝质.新疆塔里木盆地石炭-二叠系沉积特征与储盖条件研究(85-101-02-02-03)
[3]蒲仁海,李艾红.塔河1区石炭系储层预测研究报告.2000
1杨国栋.塔北地区下石炭统轮藻的发现及其意义[J].地质论评,1990,36(3):269～278
2何发岐,翟晓先,俞仁连,等.塔河油田石炭系卡拉沙依组沉积与成因分析[J].石油与天然气地质,2004,25(3):258～262
3李永宏,闫相宾,张涛,等.塔河油田石炭系卡拉沙依组储层特征及其控制因素[J].石油实验地质2004,26(1):17～22
4阎相宾,李永宏.塔河油田石炭系砂层划分对比及横向预测[J].勘探地球物理进展,2002,25(5):36～40
5顾家裕,周路,白玉雷,等.塔里木盆地石炭系沉积环境及油气分布[M].新疆乌鲁木齐:新疆科技卫生出版社,1992.116～130
6郭齐军,赵省民,塔河地区石炭系沉积特征[J].石油与天然气地质,2003,23(1):99～102
7Wood S H.Seismic expression and geological significance of a la-custrine delta in Neogene deposits of the western Snake Plain,Ida-ho[J].AAPG Bulletin,1994,78(1):102-121
8Cross T A.Application of High-Resolution Sequence Stratigraphy to Reservoir Analysis[A].In:Proceedings of the7th Exploration and Production Research Conference,Paris,Technip,1993,11-33
9Reynolds.Dimensions of paralic sandstone bodies[J].AAPG Bul-letin,1999,83(3):211-229
10牟荣.复杂小断块圈闭识别描述方法———以苏北盆地为例[J].石油与天然气地质,2006,27(2):269～274
11韩文功,张建宁,王金铎.济阳坳陷隐蔽圈闭识别与精细描述[J].石油与天然气地质,2006,27(6):849～859
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