应用曲线组合法识别正南气藏气层

在气藏的气层识别过程中，应根据具体情况选用合适的测井曲线，提高对目的层的正确判断。分析了正南气田的特点和测井系列存在的问题，提出了将不同的测井曲线进行组合应用的方法，如声波曲线与自然伽马曲线组合、声波曲线与自然电位组合、中子伽马与自然伽马组合、声波曲线与中子伽马曲线组合等。运用不同测井曲线的组合方法消除了因泥浆侵入、岩性变化大等因素产生的错误判断，重新认识了地层的流体性质。试油结果证实了曲线组合方法的可靠性。

Application of curve combination method to identifying the gas beating formations in Zhengnan gas reservoir

Suitable log should be selected according to the practice so as to improve the correct judegment of the target strata during the process of gas bearing formation identification in the gas reservoir. Based on the analysis of the feature and the log series problem in Zhengnan gas field, the method of log combination was put forward such as the combination of acoustic curve and natural gamma curve, acoustic curve and natural potential curve, neutron-gamma curve and natural gamma curve, acoustic curve and neutron-gamma curve and so on. Wrong judgement resulted from mud invasion and large change of lithological change may be eliminated, and formation fluid characteristics may be recognized a-gain by using the combination method of various log. Formation testing results proved the reliability of the method.