核磁测井资料的解释方法与应用

Interpretation Method and Application of Nuclear Magnetic Resonance Logging.

核磁测井主要测量氢核的Ｔ２、Ｔ１弛豫特征，而驰豫特征与岩石中含氢流体的类型、含量等有密切关系，因此利用仪器输出的Ｔ１、Ｔ２或扩散系数Ｄ，可以识别流体性质，确定地层的孔隙度、含水饱和度、束缚水饱和度、渗透率、原油粘度等众多的储集层参数。已经发展了利用测得的回波列或Ｔ２分布进行储集层评价的多种方法，实验室研究是这些方法的基础。利用核磁测井进行地层评价时，不存在多解性，结果不受骨架的影响，在油气田勘探与开发中有着广泛应用。

NML mainly measures the relaxation time T 2 and T 1 of proton, and there is close relationship between relaxation time and the type and volume of fluid in rocks. Using the T 2,T 1 and D acquired in NML, we can determine the properties of fluid and many petrophysical parameters such as porosity, saturation, permeability, crude oil viscosity and so on. A lot of interpretation methods for reservoir evaluation by use of T 2 distribution has been developed based on the laboratory research. There is no ambiguity in NML reservoir evaluation, and the result is lithology independent. So NML has great potentiality in oil and gas prospecting and development.