Prediction of Triassic gypsum cap rocks in Tongnanba region of Northeast Sichuan Basin
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摘要: 在精细地层对比、膏盐岩岩石物理分析以及模型正演的基础上,确定了川东北通南巴地区膏盐岩盖层的地球物理响应特征;利用神经网络地震相分析技术刻画了盖层发育相带展布;采用三维地震属性分析、小波分频解释和密度反演等技术预测了膏盐岩盖层分布,建立了一套适合该区膏盐岩盖层的预测技术方法,并对研究区盖层与油气关系进行了初步分析。认为该区主要发育3套膏盐岩盖层,而嘉四五段—雷一段膏盐岩厚度大、蠕动性好,对断层具自封闭效应,是最有利的区域盖层,但封盖条件受断层活动规模影响。该区南部断裂活动弱,往北活动增强,北部断裂封盖条件存在风险。Abstract: Based on detailed stratigraphic correlation,gypsum-salt rock petrophysical analyses and forward mo-deling,it was identified in this paper the seismic response characteristics of gypsum-salt cap rocks in Tongnanba region of the Northeast Sichuan Basin.With neural network seismic facies analysis method,the beneficial facies distribution of cap rocks was figured out.Using 3-D seismic attribute analysis,wavelet frequency interpretation and density inversion technologies,a set of prediction method suitable for the gypsum-salt cap rocks in the region was proposed.The relationship between cap rocks and petroleum in the region was analyzed.There were 3 suits of gypsum-salt cap rocks in the region,among which the gypsum-salt cap rocks from the 4th,5th Members of the Jialingjiang Formation to the 1st Member of the Leikoupo Formation were the best beneficial regional cap rocks due to big thickness,well crawling and self-sealing to faults;however,the sealing conditions were affected by fault activities.Fault activities increased from south to north,resulting in more risks for fault-sealing in the north.
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Key words:
- gypsum-salt rock /
- cap rock /
- marine strata /
- Triassic /
- Tongnanba region /
- Northeast Sichuan Basin
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[1] 陈元华,田永敏,史振勤,等.对南方海相碳酸盐岩区勘探的思考[J].断块油气田,1999,6(4):18-20. [2] 郭彤楼,楼章华,马永生.南方海帽油气保存条件评价和勘探决策中应注意的几个问题[J].石油实验地质,2003,25(1):3-9. [3] 邓模,吕俊祥,潘文蕾,等.鄂西渝东区油气保存条件分析[J].石油实验地质,2009.31(2):202-206. [4] 李国平.天然气封盖层研究与评价[M].北京:石油工业出版社,1996:57-79. [5] 王鑫.地震属性技术在王73地区储层预测中的作用[J].石油物探,2007,46(3):272-277. [6] 殷积峰.波形分类技术在川东生物礁气藏预测中的应用[J].石油物探,2007,46(1):53-57. [7] 黄小平,杜洪凌,史晓川.地震相分析在石南21井区沉积相划分中的应用[J].新疆石油地质,2004.25(6):671-672. [8] 施泽进,田亚铭,韩小俊,等.川东南地区下占生界地震相特征及意义[J].石油实验地质,2009,31(1):31-35. [9] 唐大海,谢继容.Stratimagic地震相分析技术在川中GSM油气勘探中的应用[J].四川地质学报,2004,24(3):185-189. [10] 于建国,姜秀清.地震属性优化在储层预测中的应用[J].石油与天然气地质,2003,24(3):291-294. [11] 侯伯刚,杨池银,武站国,等.地震属性及其在储层预测中的影响因素[J].石油地球物理勘探,2004,39(5):553-558,574. [12] 冯凯,查朝阳,钟德盈.反演技术和频谱成像技术在储层预测中的综合应用[J].石油物探.2006,45(3):262-266. [13] 张雷,卢双舫,张学娟,等.地震频谱成像的地质含义及在沉积特征研究中的应用[J].石油与天然气地质,2009,30(6):779-785. [14] 朱定,孙索琴,蒋进勇,等.分频解释技术在塔河油田储层预测中的应用[J].石油与天然气地质.2010,31(1):49-53. [15] 姜传金,马学辉,周恩红.拟声波曲线构建的意义及应用[J].大庆石油地质与开发,2004,23(1):12-14. -
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