致密砂岩储层具有低孔隙度、低渗透率的特征,储层中的流体对测井响应的贡献大大减小,流体识别及评价变得更加困难,迫切需要发展有效的测井解释方法。从梨树断陷营城组致密碎屑岩储层的地质特征研究入手,基于孔隙流体对测井数据的敏感性研究了测井曲线重叠法、声波测井与反演声波曲线重叠法、孔隙度差值与比值法、电阻率—孔隙度交会图法、正态分布法等多种流体识别方法,建立并优选了有效的测井流体评价方法,实现了对研究区油气层的定性识别。研究表明,上述方法均适用于研究区的流体识别,2种重叠法、孔隙度差值与比值法、电阻率—孔隙度交会图法更适用于天然气储层,孔隙度差值与比值法、电阻率—孔隙度交会图法、正态分布法更适用于油水储集层。利用上述方法对研究区目标井进行了测井资料精细解释,重新认识和评价储层,为油田勘探开发提供重要的决策依据与参考。 Tight sandstone reservoirs are characterized by low porosity and low permeability, and the contribution of fluids in reservoir to logging response is greatly reduced. Fluid identification and evaluation becomes more and more difficult. Therefore, there is an urgent need to develop effective logging interpretation methods. Based on the study of the geologic characteristics of dense clastic rock reservoirs in Yingcheng Formation of the rift sag in the pear block, based on the sensitivity of the pore fluid to the well logging data, the well logging curves overlap method, acoustic logging and inversion acoustic curve overlap method, The method of well logging fluid evaluation is established and optimized based on the method of multidiscipline, ratio of difference and ratio, resistivity-porosity cross plot and normal distribution method, and the qualitative identification of oil and gas reservoirs in the study area is realized. The results show that the above methods are suitable for fluid identification in the study area. Two kinds of overlap method, porosity difference and ratio method, and resistivity-porosity cross-plot method are more suitable for natural gas reservoirs, porosity difference and ratio method, Resistivity-porosity cross plot method, normal distribution method is more suitable for oil and water reservoir. Using the above method, the logging data of the target well in the study area are interpreted in detail, and the reservoir is re-recognized and evaluated, providing important decision-making basis and references for oilfield exploration and development.