【摘要】 低勘探领域(深层、深水和新区)是今后油气勘探的重要方向,而有没有有效烃源岩将决定该领域是否具有勘探价值,因此烃源岩评价是低勘探领域早期评价的关键。由于少井条件下烃源岩的评价参数几乎均未知,因此,低勘探程度与烃源岩早期评价是一对矛盾。针对低勘探领域的资料条件,探讨了在层序地层框架基础上的多项烃源岩参数的早期预测及综合评价方法。主要包括4个方面,即(1)层序地层格架分析法确定主力烃源岩层段;(2)地震速度岩性分析法确定烃源岩厚度;(3)烃源岩镜质体反射率地震预测法估算烃源岩成熟度;(4)烃源岩综合评价。本方法充分利用层序地层学方法和地球物理技术,实现了低勘探程度与烃源岩早期评价之间矛盾的转化,成为低勘探领域烃源岩早期预测的一种新方法。更多还原

【Abstract】 Low exploration activity fields (deep formation, deep water and new exploration areas) are important for petroleum exploration. Source rock evaluation, the result of which will determine the exploration potential of a basin, is one of the most important aspects. Because all the evaluation parameters are almost unknown in an area of low exploration activity with sparse wells, the early evaluation of source rock is somewhat contradictory. Based on the framework of sequence stratigraphy, this paper presents a method of early prediction and comprehensive evaluation of source rocks. The method includes four aspects: (1) analysis of sequence stratigraphy to determine the main formation of source rocks; (2) prediction of seismic velocity and lithology to determine the thickness of source rocks; (3) prediction of vitrinite reflectance, based on seismic data to determine the maturation of source rocks; (4) comprehensive source rock evaluation. Using the method of sequence stratigraphy and geophysical techniques, this method successively solves the contradiction between low exploration activity and early evaluation of source rock and provides a new choice for an early prediction on source rocks in fields of low exploration activity.更多还原