塔河油田三叠系非构造圈闭识别与评价技术
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摘要
塔河油田勘探开发研究表明,三叠系目的层埋深大,局部构造幅度低,圈闭类型主要为低幅度构造、岩性圈闭及岩性+构造的复合圈闭等隐蔽型圈闭。结合三叠系油气勘探的实践经验,提出了3个层次、9种方法的非构造圈闭识别与评价研究思路。3个层次及有关方法是:进行区域上的整体、动态、综合研究,寻找有利油气聚集带;在有利油气聚集带上,开展以层序地层学研究为基础、地震振幅提取技术为核心的塔河油田非构造圈闭地震识别与评价的系列技术研究,寻找、识别有利的非构造圈闭;在可能的圈闭基础上,利用地震烃类检测技术进行圈闭评价。3个层次、9种方法的全面研究和有机结合是减小非构造油气藏勘探风险,提高勘探成功率的有效途径。
Exploration and development activities in Tahe oilfield indicate that the Triassic targets are characte-rized by great burial depth and low amplitude of local structures.Its traps are mainly of subtle types,including low amplitude structure,lithologic structures,and lithologic-structural combination traps.This paper puts forward ways of identification and evaluation of non-structural traps based on the experiences of exploration in the Triassic strata.Favorable oil an gas plays are firstly located through an all-round,dynamic,and comprehensive regio-nal study;then,seismic identification and evaluation techniques of non-structural traps with amplitude extraction as the core are developed based on study of sequence stratigraphy to locate and identify favorable non-structural traps in Tahe oilfield;and finally,trap evaluation is performed by using the technology of seismic hydrocarbon detection.A rational combination of the above-mentioned methods may be a effective way to reduce exploration risks and improve success rate.
Exploration and development activities in Tahe oilfield indicate that the Triassic targets are characte-rized by great burial depth and low amplitude of local structures.Its traps are mainly of subtle types,including low amplitude structure,lithologic structures,and lithologic-structural combination traps.This paper puts forward ways of identification and evaluation of non-structural traps based on the experiences of exploration in the Triassic strata.Favorable oil an gas plays are firstly located through an all-round,dynamic,and comprehensive regio-nal study;then,seismic identification and evaluation techniques of non-structural traps with amplitude extraction as the core are developed based on study of sequence stratigraphy to locate and identify favorable non-structural traps in Tahe oilfield;and finally,trap evaluation is performed by using the technology of seismic hydrocarbon detection.A rational combination of the above-mentioned methods may be a effective way to reduce exploration risks and improve success rate.
引文
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2张希明,刘清芳.塔北地区中、新生界油气藏的形成、分布及勘探远景[J].新疆石油地质,1997,18(4):302~306
3牟泽辉,熊海河,朱宏权,等.塔里木盆地阿克库勒凸起油气成藏演化[J].石油与天然气地质,1997,18(3):228~230,242
4曹守连,陈发景,罗传容.塔北中、新生代前陆盆地沉降机制的数值模拟[J].石油与天然气地质,1994,15(2):113~120
5陈文学,姜在兴,鲜本忠.层序地层学与隐蔽圈闭预测——以河南泌阳凹陷为例[M].北京:石油工业出版社,2000
6李宗杰,王胜泉.地震属性参数在塔河油田储层含油气性预测中的应用[J].石油物探,2004,43(5):453~457
7曹慧兰,靳文芳,王世星,等.塔河油田于奇地区三叠系层序地层研究及储层预测[A].见:李剑峰,编.油气地球物理实用新技术论文集[C].北京:石油工业出版社,2005.22~27
8 Partyka G,Gridley J,Lopez J.Interpretational application of spectraldecomposition in reservoir characterization[J].The Leading Edge,1999,18:353-360
9 Castagna J P,Sun S.Instantaneous spectral analysis:dectection oflow frequency shadows associated with hydrocarbons[J].The Lea-ding Edge,2003,22:120-127
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