收稿日期: 2003-01-23
修回日期: 2003-03-03
网络出版日期: 2003-04-20
CONDITIONS AND MECHANISM OF HYDROCARBON ACCUMULATION IN OVERPRESSURED SYSTE MS IN SEDIMENTARY BASINS
Received date: 2003-01-23
Revised date: 2003-03-03
Online published: 2003-04-20
近年来的研究及勘探实践表明 ,沉积盆地的超压体系与油气藏特别是深层油气藏的关系非常密切。超压体系油气藏是未来油气勘探的重要方向之一。沉积盆地超压体系具有油气成藏的特定条件和方式。超压抑制和延迟了油气的生成和成熟、改善了深部储层的储集性能、增强了对烃类的封盖作用、扩大了液态窗的范围 ,为深层油气藏的勘探创造了有利条件。超压体系内油气的排放是以幕式进行的并以准封闭体系――封存箱的形式构成独立的油气成藏系统。目前 ,在超压与油气生成关系方面仍然有许多有争议的看法 ,和对超压体系内油气成藏机理问题的研究还不够深入。这些争议和问题都亟待解决。
陈中红;查明;曲江秀; . 沉积盆地超压体系油气成藏条件及机理[J]. 天然气地球科学, 2003 , 14(2) : 97 -102 . DOI: 10.11764/j.issn.1672-1926.2003.02.97
The research and practice of exploration show that overpressure systems in sedim entary basins have close relationship with hydrocarbon occurrence and are signif icant for exploration of deep reservoirs.Overpressure inhibits or retards the generation and maturation of hydrocarbon and improves the porosity and permeabil ity of the reservoirs. It also strengthens the sealing for hydrocarbon and broa dens the range of“liquid state window”which determines the accumulation and po oling of natural gas. So it creates favorable conditions for the exploration an d development of reservoirs in the deep of basin. Overpressure systems formes i ndependent hydrocarbon accumulation systems as a form of compartment from which fluid releases repetitively through a cycle of healed state to fracturing state .There are still many problems to resolve, especially for the relationship bet ween overpressure and hydrocarbon generation, which has been argued, and the mec hanism of hydrocarbon accumulation in overpressure systems. The issues of hydro carbon accumulation in overpressure systems will be important tasks for oil or g as exploration in future.
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