石油与天然气地质 ›› 2007, Vol. 28 ›› Issue (6): 713-720.doi: 10.11743/ogg20070603

• 论文 • 上一篇    下一篇

中国海相油气演化成藏特点研究

张抗   

  1. 中国石油化工股份有限公司 石油勘探开发研究院,北京 100083
  • 收稿日期:2007-04-25 出版日期:2007-12-25 发布日期:2012-01-16

Research on the characteristics of marine hydrocarbon evolution and accumulation in China

Zhang Kang   

  1. Research Institute of Petroleum Exploration & Production, SINOPEC, Beijing 100083, China
  • Received:2007-04-25 Online:2007-12-25 Published:2012-01-16

摘要:

中国海相油气藏生成演化具有时代老、改造频(特别是受晚近时期构造活动影响)的特点,中国海相储集体具有极强的非均质性。碳酸盐岩储集体主要为岩溶形成或改造的孔缝洞,可按岩溶发育程度分为纳溪型、塔河型、任丘型和普光型4类。因有多个不同层位、类型的烃源以及新构造运动的影响,油气的生成和成藏具多期性。源控论对其具有一定的局限性,可以按油气藏与源岩的关系分为原生、准原生和次生3类。保存条件对油气的工业聚集有决定性意义,对海相油气勘探需注重石油地质基础研究,勘探工作的重点放在有保存条件的覆盖区,油气并举,更要重视对气的研究。

关键词: 多期成藏, 多源性, 油气藏的演化和改造, 保存条件, 中国海相油气

Abstract:

Marine hydrocarbon accumulation and evolution in China is characterized by old age and frequent modification,especially by tectonic movements in the later period.Strong heterogeneity is one of the features of marine reservoirs in China.The reservoir spaces of carbonates are dominated by pores,fractures and vugs formed or enhanced by karstification.The existence of favorable primary pores and vugs is one of the conditions for karstifieation.According to the degree of karst development,the karst reservoirs can be divided into four types, including Naxi,Tahe,Renqiu,and Puguang.Hydrocarbon generation and accumulation occurs in multistage and is influenced especially by the neotectonic movement.Several source rocks of different types and of different horizons may have contributed to the reservoirs.Consequently,source control theory,to a certain degree,is not applicable to these reservoirs.It is recommended to divide these reservoirs into primary,quasi-primary,and secondary reservoirs according to the relationship between hydrocarbon reservoirs and source rocks.The preservation conditions are critical to commercial hydrocarbon accumulations.Marine hydrocarbon exploration shall stress the importance of basic studies on petroleum geology and focus on areas with favorable preservation conditions,so as to provide information for exploiting deeper strata under ductile beds.Oil and gas exploration and development shall be carried out simultaneously and more attention shall be given to gas.

Key words: multi-phase hydrocarbon accumulation, pologeneses, evolution and modification of hydrocarbon reservoirs, preservation condition, marine hydrocarbon in China

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