利用测井资料研究和评价生油岩

Study and evaluation of oil source rock using log data

本文首先介绍生油岩及其定性、定量评价指标，然后介绍用测井资料研究生油岩的依据及其地球物理特征，最后利用回归分析得到氯仿沥青“A”、有机碳TOC、吸附烃面积S1＋热解烃S2及二氧化碳面积S3与自然伽玛GR、电阻率Rt的相关关系。通过××凹陷东营组一、二段、东营组三段、沙河街组一、二段及沙河街组三段定量分析的实例，指出利用测井资料研究和评价生油岩的可行性，而且随着深度的增加，各地质层段生油岩的“A”、TOC、S1＋S2及S3确定得越准确。

The paper firstly introduces the oil source rock and its qualitative and quantitative evaluation indexes and then introduces the basis of studying source rock using log data and the geophysical signature of source rock. Finally the relation of chloroform bitumen 'A', organic carbon TOC, absorbed hydrocarbon area S1 plus pyrolysis hydrocarbon area S2, and carbon dioxide area S3 to gamma-ray GR and resistivity Rt is found by regression analysis.An actural example from a sag indicates that it is feasible to study and evaluate source rock using log data, and that the deeper the sag , the more accurately 'A ',TOC. S1+S2,and S3 of source rock are determined.