利用压实曲线研究初次运移的新方法

提出一种解释压实曲线的新方法—动态分析法,它不同于一般的分析方法—静态分析法。这种方法主要是根据泥岩压实的不可逆性和岩性组合对形成欠压实所起的控制作用。利用这种方法可以把欠压实曲线分解成各种不同类型泥岩的压实曲线,特别是能获得欠压实泥岩后期压实的趋势。用动态分析法研究压实曲线能够获得许多不同于静态分析的结论,诸如,排烃深度、排烃方向以及对生油岩评价等方面。根据这一新方法,可以把压实曲线分为三类,并在此基础上能快速地进行含油气远景的预测和评价。这一方法从理论上讲比静态分析的方法科学,但仍有待于实践上的验证。

A NEW METHOD OF STUDYING PRIMARY MIGRATION BYMEANS OF THE COMPACTION CURVE

Based on the irreversibility of compacted argillaceous rocks and the controlling effect of lithologic composition on under-compaction, a new method of dynamic analysis for the interpretation of compaction curves is proposed. With this method, under-compaction curves may be segregated into compaction curves of different types and trends of later compaction for under-compacted argillaceous rocks may be predicted. Besides, the conclusions drawn thereby about the depth and direction of expulsion of hydrocarbons and appraisal of source rocks are different from those by static analysis in many ways. Compaction curves are classified into three kinds. They may be used for forecasting and appraising of oil prospects readily.