靖边气田马五_(1+2)古岩溶气藏储层连通性研究
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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。
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.
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.
引文
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[2]代金友,何顺利.鄂尔多斯盆地中部气田奥陶系古地貌研究[J].石油学报,2005,26(3):37～39.
[3]周树勋,马振芳.鄂尔多斯盆地中东部奥陶系不整合面成藏组合及其分布规律[J].石油勘探与开发,1998,25(5):14～18.
[4]晏宁平,张宗林,何亚宁,等.靖边气田马五1+2气藏储层非均质性评价[J].天然气工业,2007,27(5),102～103.
[5]代金友,张一伟,史若珩,等.鄂尔多斯盆地中部气田剥蚀脊与沟槽[J].石油勘探与开发,2005,32(6):29～31.
[6]顾岱鸿,代金友,兰朝利,等.靖边气田沟槽高精度综合识别技术[J].石油勘探与开发,2007,34(1):60～64.
[7]冯增昭,鲍志东.鄂尔多斯奥陶纪马家沟期岩相古地理[J].沉积学报,1999,17(1):1～8.
[8]付金华,郑聪斌.鄂尔多斯盆地奥陶纪华北海和祁连海演变及岩相古地理特征[J].古地理学报,2001,3(4):25～33.
[9]包洪平,杨承运.鄂尔多斯东部奥陶系马家沟组微相分析[J].古地理学报,2000,2(1):31～41.
[10]王文炯.陕甘宁盆地中部大气田成藏条件分析[J].断块油气田,1995,2(1):10～15.
[11]马振芳,陈安宁,王景.鄂尔多斯盆地中部古风化壳气藏成藏条件研究[J].天然气工业,1998,18(1):9～13.
[12]王雪莲,王长陆,陈振林,等.鄂尔多斯盆地奥陶系风化壳岩溶储层研究[J].特种油气藏,2005,12(3):32～35.
[13]席胜利,李振宏,王欣,等.鄂尔多斯盆地奥陶系储层展布及勘探潜力[J].石油与天然气地质,2006,17(1):405～412.
[14]杨遂正,金文化,李振宏.鄂尔多斯多旋回叠合盆地形成与演化[J].天然气地球科学,2006,17(4):494～498.
[15]吴智勇,郑秀才,张尚峰.鄂尔多斯盆地中部马五14碳酸盐岩的成岩作用[J].江汉石油学院学报,1995,17(2):15～20.
[16]郑秀才.鄂尔多斯盆地中部马五4亚段成岩作用及储集性能[J].西安地质学院学报,1996,18(1):43～49.
[17]王彩丽,孙六一,王宏.长庆气田马五1储层裂缝类型及特征[J].天然气工业,1999,19(4):8～12.
[18]柳广第,郝石生.鄂尔多斯盆地区古生界生烃史和排烃史的模拟[J].石油大学学报(自然科学版),1996,20(1):13～18.
[19]孙少华,李小明,龚革联,等.鄂尔多斯盆地构造热事件研究[J].科学通报,1997,42(3):306～308.
[20]蒲仁海,姚宗慧,张艳春.鄂尔多斯盆地古构造演化在气田形成中的作用及意义[J].天然气工业,2000,20(6):27～30.
[21]张宗林,王宏,秦志宝,等.长庆气田下古生界马五段碳酸盐岩储层类别测井识别方法研究[J].天然气工业,2000,20(3):44～46.
[22]张福礼.鄂尔多斯盆地早古生代复合的古构造体系与天然气[J].地质力学学报,2002,8(3):193～200.
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