石油与天然气地质 ›› 2006, Vol. 27 ›› Issue (1): 1-10.doi: 10.11743/ogg20060101

• 油气系统与成藏组合 •    下一篇

油气系统成因分类及其勘探思路

赵宗举1,2   

  1. 1. 中国石油,杭州石油地质研究所,浙江,杭州,310023;
    2. 中国石油,塔里木油田分公司博士后工作站,新疆,库尔勒,841000
  • 收稿日期:2005-08-20 出版日期:2006-02-25 发布日期:2012-01-16
  • 基金项目:

    中国石油天然气集团公司"九五"油气勘探科技工程项目(970205);中国石油天然气股份有限公司科技项目(200203-15及20421)

Genetic classification of petroleum system and idea of exploration

Zhao Zongju1,2   

  1. 1. Hangzhou Institute of Petroleum Geology, Hangzhou, Zhejiang 310023, China;
    2. Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2005-08-20 Online:2006-02-25 Published:2012-01-16

摘要:

通过复杂构造改造区油气系统及其油气藏成藏规律的总结,立足于油气系统"动态演化"分析,结合油气藏成因类型,将油气系统分为原生油气系统、再生烃油气系统及复合油气系统3大类。原生油气系统主要是由烃源岩初次生烃所形成的油气系统,其中的油气藏又包括初次生烃形成的原生油气藏,以及原生油气藏被改造、重新调整、再次运聚形成的次生油气藏。再生烃油气系统是指曾经有过生烃过程但因后期构造抬升而暂停生烃的烃源岩被再次深埋,由烃源岩二次或多次生烃的后期生烃过程所形成的油气系统。复合油气系统是指由不同烃源岩形成的不同油气系统在空间与时间上的复合或叠合而成的油气系统。不同的油气系统其勘探思路不同。原生油气藏的勘探主要在于"定凹(生烃凹陷)选带 (有利构造带)"。次生油气藏及复合油气藏的勘探关键在于搞清油气藏的形成、演化与改造过程。再生烃油气藏的勘探主要是确定"二次生烃中心"或再生烃中心,强调晚期成藏的重要性。

关键词: 原生, 次生, 再生烃, 复合, 改造型盆地, 叠合盆地, 残留盆地

Abstract:

Based on summarizing the petroleum systems and reservoiring patterns in complex areas reworked by tectonic movements, petroleum systems can be classified into primary, regenerated and composite types through analysis of"dynamic evolution"and genetic types of reservoirs. The primary petroleum system has mainly been formed by primary hydrocarbon generation of source rocks. The oil and gas reservoirs in the primary petroleum system include primary reservoirs being sourced by primary hydrocarbon generation and secondary reservoirs having experienced remigration and reaccumulation of hydrocarbons after the primary reservoirs have been reconstructed and readjusted. The regenerated petroleum system has been formed in later stage through secondary or even multiple hydrocarbon generation of source rocks that have been reburied after the hydrocarbon generation process ceased due to uplifting. The composite petroleum system has been formed as a result of overlapping or superimposition in space and time of various petroleum systems generated from different source rocks. Different ideas should be applied while exploring different petroleum systems. Exploration of primary petroleum system should be focused on"delineation of sag (oil-generating sag) and selection of zones (favorable structural zone)". Exploration of secondary and composite reservoirs hinges on understanding the formation, evolution and reconstruction processes of reservoirs. While the key of exploration of regenerated reservoirs is to define the"secondary hydrocarbon generation center"or"regeneration center"and to stress the importance of late reservoiring.

Key words: primary, secondary, regeneration of hydrocarbon, composite, reconstructed basin, superimposed basin, residual basin

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