鄂尔多斯盆地靖边气田马五_(1+2)气藏储集单元研究
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摘要
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,在沟槽识别和致密带研究基础上,通过井间干扰、油层压力变化和试井边界响应分析,按照局部、就近原则对靖边气田马五1+2气藏进行了储集单元划分。共划分出111个储集单元,其中独立型69个,复合型42个。这些储集单元的面积多介于10～50km2之间,单个储集单元的井数一般少于6口。在对气藏储层特征综合认识的基础上,确定流动单元划分思路与流程,并认为关键环节包括古沟槽识别、致密带研究、动静结合确定储集单元等3个方面。储集单元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—中等充填泥粉晶白云岩相对应性好;另一方面又受各级古沟槽夹持,在两个一级古沟槽之间往往共生多个储集单元,而这些储集单元边界又严格地受二级或三级沟槽切割控制。
Lower Ordovician Majiagou 51+2 gas reservoir is divided into 111 bed units in which include 69 independent and 42 compound ones. These bed units commonly are 10～50 km2 in extent of area, and the well number of a single bed unit is generally less than 6 wells. Comprehensive recognition of the reservoir bed units are founded on three key aspects, i.e. the identification of paleo-ravines, the research of compact belt and the analysis of combining dynamic and static data. The reservoir bed units are not only under the control of the favorable diagenetic belt that enclosed by dense rocks, but also under the control of different orders of paleo-ravines. Several reservoir bed units commonly coexist between two 1st-order paleo-ravines while the margins of these units are cut by 2nd-order and 3rd-order paleo-ravines.
Lower Ordovician Majiagou 51+2 gas reservoir is divided into 111 bed units in which include 69 independent and 42 compound ones. These bed units commonly are 10～50 km2 in extent of area, and the well number of a single bed unit is generally less than 6 wells. Comprehensive recognition of the reservoir bed units are founded on three key aspects, i.e. the identification of paleo-ravines, the research of compact belt and the analysis of combining dynamic and static data. The reservoir bed units are not only under the control of the favorable diagenetic belt that enclosed by dense rocks, but also under the control of different orders of paleo-ravines. Several reservoir bed units commonly coexist between two 1st-order paleo-ravines while the margins of these units are cut by 2nd-order and 3rd-order paleo-ravines.
引文
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[2]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.
[3]刘吉余,黎文清.油气田开发地质基础[M].4版.北京:石油工业出版社,2006,336-337.
[4]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.
[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.沉积学报[J],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(3):405-412.
[14]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.
[15]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.
[16]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.
[17]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.
[18]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.
[19]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.
[20]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.
[21]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.天然气工业,2000,20(6):27-30.
[22]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.
[23]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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