主要阐述了当量品位的概念、主要工作方法及影响当量品位法二次圈定矿体的各方面因素。
Concept of grade equivalent, major working methodology and factors impacting secondary orebody outlining by grade equivalent are described.
第三章对此磁致偏振特性测量系统的搭建及工作原理（消光法）、影响测量结果的因素及解决方法、实验操作步骤等作了说明。
So the third chapter focuses on the measuring system. The operating principle (Light extinction method), the factors which influence the result and the resolvent to avoid them are explained.
而目前通常采用的现金流量法存在着工作量大、不确定因素多等不足，提出应用边际分析法来计算油田经济可采储量。
The cash flow method commonly in use at present has the disadvantages of large amount of workload and many uncertain factors.
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