在墨西哥湾,通常用密度、中子和感应测井评价砂岩油藏。将这些测量方法综合起来可以经济有效地确定岩性、孔隙度和饱和度。然后再用这些油藏特性预测层段的产能。在许多层段很难精确地预测产能,特别是在由极细粒岩石结构或薄层引起的高束缚水层段中,不利于产能预测。在其它情形下,井眼条件也造成一些困难。尤其是油基泥浆由于深侵入和对常规测井响应的掩蔽使得解释起来更困难。核磁共振(NMR)方法已长期用于辅助常规测量。NMR测得地层孔隙度、孔隙大小的响应并由此提供储层产能的附加信息。然而,NMR方法的主要局限性在于采集数据的时间和成本。尽管已不需要在泥浆中加添加剂,但NMR测量的相当长的周期仍使得测井速度很慢。本文证明了NMR测井在墨西哥湾沿岸陆上和近海岩石物理分析中的经济有效的应用。给出的实例研究是NMR与常规测井测量方法的综合利用。实例包括的情况是NMR数据与密度一中子—感应测井数据同时采集以提供完全的实时分析。补充的实例证明了电缆NMR测量是如何与随钻测量结果结合,从而经济有效地对大斜度井作出评价。这些实例(完全与开采结果吻合)证明了在淡水泥浆体系和油基泥浆的井中NMR解释的应用和从高孔隙度净砂岩到低阻产层油藏范围中的应用。最后,将NMR测量结果与常规测量结果综合可以经济有效地提供墨西哥湾沿岸储层的更完整的岩石物理分析。 In the Gulf of Mexico, sandstone reservoirs are commonly evaluated using density, neutron and inductive logging. Combining these measurements makes it possible to determine lithology, porosity and saturation cost-effectively. These reservoir characteristics are then used to predict the productivity of the interval. It is difficult to predict production capacity accurately in many intervals, especially in the highly irreducible water intervals caused by very fine grained rock formations or thin layers, which is not good for capacity prediction. In other cases, borehole conditions have also caused some difficulties. Oil-based muds, in particular, are more difficult to interpret due to deep intrusion and masking of conventional logging responses. Nuclear magnetic resonance (NMR) methods have long been used to aid in routine measurements. NMR measures formation porosity, pore size response and thus provides additional information on reservoir productivity. However, the main limitation of NMR methods lies in the time and cost of collecting data. Although there is no need to add additives to the mud, the rather long period of NMR measurement still results in a slow logging speed. This paper demonstrates the cost-effective application of NMR logging in onshore and offshore petrophysical analysis of the Gulf Coast. The given case study is the comprehensive utilization of NMR and conventional logging methods. Examples include the case where NMR data is collected simultaneously with density-neutron-sensitive logging data to provide full real-time analysis. Additional examples demonstrate how cable NMR measurements can be combined with measurements while drilling to make cost-effective evaluation of highly deviated wells. These examples, completely consistent with the mining results, demonstrate the application of NMR interpretation in wells with freshwater mud systems and oil-based muds and applications in the area of ​​high porosity, pure sandstone to low-resistivity reservoirs. Finally, combining NMR measurements with routine measurements provides a more complete petrophysical analysis of the Gulf Coast reservoir economically and effectively.