油气系统研究方法应用中若干问题的讨论

An approach to the application of petroleum system method

近年来许多学者将“含油气系统”作为石油地质单元看待 ,进而又提出将其列为一个勘探阶段的勘探对象的建议。如何看待这一概念 ,直接涉及到其应用效果。机械套用这一概念可能导致实际勘探中无所适从 ,或限制勘探领域的不断扩展。从实用角度出发 ,将“含油气系统”定义为一种综合分析方法更为适当。盆地的油气勘探是一个渐进过程 ,地质认识也是在不断修正和深化。就本来的意义而言 ,油气勘探并非是要证明某种客观存在 ,而是在逐步逼近客观实际 ,在这种逼近过程中获益。几何空间圈出的“含油气系统”只反映了一定勘探阶段人们的一种认识 ,随着勘探的深入 ,这种认识必定被不断修正 ,从这种意义上看 ,“含油气系统”是一个伴随盆地油气勘探始终的认识升华。“含油气系统”是实用性很强的综合逻辑分析方法 ,其最大特点是 ,综合各种分析手段 ,形成较为完整有效的分析程序 ,通过综合分析方法 ,建立起烃源岩与储集层 (及圈闭 )的动态时空关系 ,用以预测有利勘探方向 ,指导勘探实践。随着盆地油气勘探的不断深化 ,资料的不断累积 ,烃源岩与储集层 (及圈闭 )的对应关系更具多重性 ,对“含油气系统”的刻划更趋实际。

In recent years, some scholars use petroleum system as an oil geological unit of basin, so that they have put forward a suggestion of treating it as a target at some expl oration stage. How to use the concept directly relates to the result of its appl ication. Mechanically applying petroleum system would make you being at a loss a s to what to do or restricted on continually extending the exploration area in p ractical exploration. Proceeding from practice, it is appropriate that petroleum system is defined as a comprehensive analysis method. The exploration of a basi n is a progress step by step, and the geologi cal knowledge of the basin is corrected and deepened again and again in the prog ress. In the light of the original meaning, petroleum exploration is not to prov e some objective reality but to press on towards the objective facts for the pur pose of profits in the course of working. A petroleum system drawn in an area is only a view of some geologists at some exploration stage. Along with the deepen ing of exploration, the view must be revised continually. From this point, petro leum system is a progress of cognition accompanying petroleum exploration all al ong. Petroleum system is a comprehensive analysis method of excellent logic. The main peculiarity of it is that it forms a integrated effective analysis procedu re by synthesizing various analysis methods. Through comprehensive analysis meth od, petroleum system links sources with reservoirs (traps) in time and space, co njectures favorable areas and guides exploring activities. Along with the deepen ing of oil exploration of a basin and the accumulating of data continually,the corresponding relationships between sources and reservoirs(traps)become manifold more and more,and the depictions of petroleum systems become much more clear.