“Dynamic Trap”: A Main Action of Hydrocarbon Charging to Form Accumulations in Low Permeability-Tight Reservoir
详细信息
- 责任者：Li Mingcheng (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Li Jian
- 刊名：Acta Petrolei Sinica
- 出版年：2010
- 卷期：31(5)
- 关键词：低渗透储集层 ; low permeability reservoirs ; 油气藏形成 ; reservoir formation ; 水动力圈闭 ; hydrodynamic traps
- 页码：p.718-722
- 图表：4 illus., 2 tables, 10 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
In low permeability-tight reservoir, fluid filtration belongs to the non-Darcy flow. Only when the pressure gradient comes to the starting pressure gradient, can the filtration occur. Overpressure is a predominant dynamic force for hydrocarbon migration and accumulation in low permeability-tight reservoir, and "dynamic trap" is the most important action for hydrocarbons overpressure-charged into low permeability-tight reservoirs to form accumulations and also a three-dimensional space for hydrocarbons to be relented and accumulated. "Dynamic trap" is quite different from the conventional trap with mid-high permeability reservoir such as structural trap,stratigraphic trap and lithologic trap. The difference shows not only in charging dynamic force,filtration way, but also in oil-gas-water relation,trap shape and distribution. The presentation of the "dynamic trap" concept hopes to supply new thinking for enriching petroleum geology theory, deepening hydrocarbon accumulation’s classification and prospecting unconventional hydrocarbon accumulations.
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