Hydrodynamic Characteristics and Its Effect on Oil-Gas Migration and Accumulation in Taibei Depression，Tu-Ha Basin
-
摘要: 吐哈盆地台北凹陷现今为重力水流盆地。台北凹陷可划分为胜北洼陷和丘东 -小草湖洼陷两个地下水流系统。区域地下水流向自北向南,北部山前构造带为地下水补给区,南部中央断裂带北缘为地下水排泄区。垂向上,地下水的连通性较好。台北凹陷自侏罗纪以来,经历了三个不同的地下水动力演化阶段。早期 (早侏罗世 -晚侏罗世 )为压实水流阶段,该阶段导致区内较大规模的油气藏均分布在生烃洼陷周围,有效烃源岩展布范围之内;中期 (早白垩世 -第三纪中新世 )为压实水流 -重力水流阶段,该阶段对早期形成的油气藏进行改造和调整,并在压实水流与重力水流的混合带形成油气藏;晚期 (第三纪上新世至今 )为重力水流阶段,它导致沿区域地下水流运移方向,油水界面、油气藏充满度和含油气层段均发生明显的变化。Abstract: The regional groundwater flow in Taibei depression of Tu-Ha basin is the gravit y-induced cross-formational groundwater flow. There are two gravity-induced cross-formational groundwater flow systems in Taibei depression. One is in Sheng bei sag and the other is in Qiudong and Xiaocaohu sags. The groundwater in the groundwater systems flows from north to south. The recharge area of the groundwater is in the Bogeda mountainous terrain north Taibei depression and the drainage is in the north border of the central faulted zone in Taibei depression. There is ve rti cally good hydraulic connection among the different formation waters. Since the Jurassic period，there have been three different stages of the groundwater hydro dynamic evolution. The early stage (Jurassic period) is the stage of the compacted groundwater flow，in which the compacted flow caused the large-scale oil -gas reservoir to distribute within effective source rocks around the sags of the generating hydrocarbon. In the middle stage(Cretaceous Period-Miocene Epoch)，the groundwater flow is the compacted and gravity-induced flow and it had adjusted the reservoir formed in the early stage of hydrodynamic evolution. The groundwat er caused oil and gas to accumulate in the mixed zone of the compacted and gravi ty-induced groundwater flows. In the late stage(Pliocene Epoch to now)，the grou nd water flow is driven by topography and it had the interface of oil/water，the oil saturation of reservoir and the oil-gas-bearing formation and location chang edsignificantly along regional groundwater flow.
-
Key words:
- hydrodynamic /
- evolution oil-gas /
- migration and accumulation /
- Taibei depression
-
[1] Toth J.Petroleum hydrogeology：a new basic in exploration[J] . World Oil， 1987.49：8～50 [2] Bachu S，Underschultz J R.Hydrogeology of formation waters，No rtheastern Alberta Basin[J] .AAPG Bulletin，1993，77(10)：1 745～1 768 [3] Garven G.A hydrogeologic model for the formation of the giant oil sa nds deposits of Western Canada Sedimentary Basin[J] . American Journal of Science，1989，289：105～166 [4] Hitchon B.Geothermal gradients，hydrodynamics，and hydrocarbon occur rences，Alberta，Canada[J] . AAPG Bulletin，1984，68(b)：713～743 [5] Gosnold W D.Heat flow and groundwater flow in the Great Plains of th e United States[J] . Journal of Geodynamics，1985，4：247～264 [6] Verweij J M. Hydrocarbon migration systems analysis[M] .Elsevier Sci ence Publishers，1993.23～78 [7] Person M，Garven C.Hydrologic constraints on Petroleum generation within continental rift basins： Theory and application to the Rhine Graben[J] . AAPG Bulletin，1992，76(4) ：468～488 [8] Coustau H，Formation waters and hydrodynamics[J] .Journal of Geochem ical Exploration. 1977，7：213～241 [9] 杨绪充编著.含油气区地下温压环境[M] .山东东营:石油大学出版社，1993.15 1～178 [10] 程汝楠编译.古水文地质及其应用[M] .北京：石油工业出版社，1981.1～12[ ZK)〗 [11] 地矿部水文地质工程地质研究所.油田古水文地质与水文地球化学－以冀中坳 陷为例[M] .北京：科学 出版社，1987.1～162 [12] 楼章华，高瑞祺，蔡希源.论松辽盆地地下水动力场演化与油气运移、聚集[J ] .沉积学报，1997，16（4)：115～120 [13] 李伟，陈晓红.台北凹陷油田水化学特征与油气保存条件分析[A] .见：王昌桂 ，路锡良主编，吐哈盆 地石油地质研究论文集[C] .北京：石油工业出版社，1995.91～97 [14] 吴涛，赵文智主编.吐哈盆地煤系油气田形成和分布[M] .北京：石油工业出版 社，1997.198～213 [15] Smith L,Chapman D S.On the thermal effects of groundwater fl ow. 1. Regional scale systems[J] . Journal of Geophysical Research，1983，88(B1)：593～608 [16] Woodbury A D, Smith L.On the thermal effects of three-dimensi onal groundwater flow[J] . Journal of Geophysical Research，1985，90(B1)：759～767 [17] Majorowicz J A，Jones F W，Lam H L, Jessop A M.Terrestr ial heat flow and geothermal gradients in relation to hydrodynamics in the Alberta Basin，Canada[J] .Journal of Geodynamics，1985，4：265～283 [18] Bethke C M.Hydrologic constraints on the genesis of the Upper Missi ssippi Valley mineral district from Illinois basin brines[J] .Economic Geology，1986a，81(2)：233～249 [19] Deming D,Nunn J A.Numerical simulations of brine migration by t opographically driven recharge[J] . Journal of Geophysical Research，1991，96(B2)：2485～2499 -
点击查看大图
计量
- 文章访问数: 540
- HTML全文浏览量: 2
- PDF下载量: 845
- 被引次数: 0
下载:
