【摘要】 靖边气田马五1+2气藏储层成层连片次生溶蚀孔、洞、缝发育,古沟槽和致密带广布,储层非均质性严重,尤其古沟槽和致密带分布、储层连通状况等与气田开发密切相关。综合地震、地质、测井等信息,考虑沉积、成岩、地貌、生产动态等多因素,在古沟槽识别和致密带研究基础上,结合井间干扰、油层压力变化和试井边界响应分析,按照局部、就近原则对马五1+2气藏进行了储层连通性研究,对连通体进行了识别。确定连通体分布一方面受控于被致密岩相包围的有利成岩相带,宏观上与弱—中等充填泥粉晶云岩对应性好;同时受各级古沟槽夹持,在2个一级古沟槽之间往往共生多个连通体,而连通体又严格地受二级或三级古沟槽切割控制。连通体问题的研究将能够直接指导马五1+2气藏生产,对于类似气田也具有很好的借鉴和指导意义。更多还原

【Abstract】 Ma 51+2gas reservoir in Jingbian Gas Field is continuous and had developed secondary dissolved pores,cavities,fissures,extensive paleo-groove and tight zones.The reservoir is highly anisotropic.The distribution of paleo-groove and tight zones and the connectivity of reservoirs are closely related to gas field development.The connectivity of the reservoir is studied and the connected volume is identified on the basis of paleo-groove identifi-cationand tight zone study according to the principles of locality and neighborhood by combining seismic,geologic and well logging data,sedimentation,diagenesis,morphology,production performance,well interference,reservoir pressure change,and boundary response analysis of reservoir test.The distribution of connected volume is subject to favorable diagenetic facies enclosed by tight lithofaices,macroscopically corresponding to the weakly-medium filled dolomicrite and dolosiltite;on the other hand,the connected volumes are held between diversified paleo-grooves.There may be many associated connected bodies between two first-order grooves,while the connected bodies are cut and controlled by the second-or third-order grooves.The study of connected volume can directly guide Ma 51+2 gas reservoir recovery and is a reference for similar gas fields.更多还原