缝洞性碳酸盐岩储层测井评价技术  

Log Evaluation Technique of Fracture Cave Carbonate Reservoir

作　　者：朱国璋 吴见萌 葛祥 缪祥禧 

机构地区：[1]中石化西南石油工程有限公司测井分公司,四川成都610100

出　　处：《测井技术》2014年第6期695-699,共5页Well Logging Technology

摘　　要：四川盆地AZ长兴组碳酸盐岩储层裂缝及溶蚀孔洞发育,储集类型为溶蚀孔洞型和裂缝-孔洞型,气水关系复杂,储层有效性判别、流体性质识别及产能预测是该类储层评价的难点。针对缝洞性储层特征,阐述了成像和偶极声波测井是解决裂缝、溶蚀孔洞识别及有效性判别的直接方法,明确了基于物性分类的不同饱和度条件下的电阻率与孔隙度交会、核磁共振测井T2分布谱信息是判别缝洞性储层流体性质的有效方法。缝洞性气层有效厚度与孔隙度乘积的累加可作为产能预测的评价指标,形成的缝洞性储层测井评价技术将进一步为经济高效地开发四川盆地AZ长兴组气藏提供有力的技术支撑。The carbonate reservoir of Changxing formation has developed fractures and corrosion holes in AZ of Sichuan basin.The type of reservoir contains emposieu and fracture-emposieu with complex relationship between gas and water.Discrimination of fracture cave reservoir validation,fluid types and fluids rate forecast are difficult for log evaluation of the reservoir.For the characteristics of the reservoir,we elaborate imaging logging and dipole acoustic logging which are the most direct approaches to fracture and corrasion hole identification and validation,combining with NMR T2 distribution,the crossplot of resistivity and porosity in different saturations classified by physical properties is the most effective method for fluid type identification of fracture cave reservoir.We propose that accumulation of effective thickness of gas pay and porosity could be an index for production forecast.These log evaluation approaches to the fracture cave reservoir will provide strong technical support to further economic and efficient development of Changxing formation gas reservoir in AZ of Sichuan basin.

关 键 词：测井评价 产能预测 碳酸盐岩 缝洞性储层 储集类型 储层有效性 流体性质 长兴组 

分 类 号：P631.84[天文地球—地质矿产勘探]