THE FORMATION MECHANISMS AND CHARACTERISTICS OF THIN-LAYER MUDSTONE CAPROCK AND ITS RELATIONSHIP WITH HYDROCARBON ACCUMULATION IN THE TERRESTRIAL BASIN——AN EXAMPLE OF THIN-LAYER MUDSTONE CAPROCK IN THE SOUTH-CENTRAL LIAODONG BAY
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摘要: 渤海海域辽东湾地区中南部近2年发现了一系列薄层泥岩作为有效盖层的油气藏。文章较全面地总结了薄层泥岩盖层特征及形成机制,在此基础上分析了薄层泥岩盖层与油气成藏的关系。通过系统研究得出如下结论:在圈闭形态良好的条件下,薄层泥岩盖层对油气藏具有良好的封盖作用;薄层泥岩质量对油气藏高度有明显的影响,而薄层泥岩盖层厚度与油气藏高度没有明显的关系;在相似薄层泥岩盖层条件下,随着圈闭形态的变好,油气藏高度变高。研究成果有助于拓宽勘探思路:在近物源储层发育的地方,虽然没有区域性盖层,只要圈闭形态良好也能找到大中型油气田。Abstract: A series of thin-layer mudstone caprock reservoirs have been found in the last two years in the south-central Liaodong Bay,Bohai offshore area.This paper comprehensively summarizes the formation mechanisms and characteristics of thin-layer mudstone caprock,and then analyzes the relationship between thin-layer mudstone caprock and hydrocarbon accumulation.Through systemic research,the following important conclusions are obtained.Under favorable trap shape condition,thin-layer mudstone caprocks have good sealing effect.Mudstone quality has obvious effect on reservoir height.But mudstone thickness has no relation with reservoir height.Reservoir height raises great along with the better trap shape under the similar sealing condition.The result of this research can broaden exploration thought for the future: In reservoir development area,large and medium oil and gas fields can be found as long as traps are in good condition.
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[1] 庞雄奇,付广,万龙贵,等.盖层封油气性综合定量评价[M].北京:地质出版社,1993. [2] 吕延防,付广,高大岭,等.油气藏封盖研究[M].北京:石油工业出版社,1996:4-30. [3] 童晓光,牛嘉玉.区域盖层在油气聚集中的作用[J].石油勘探与开发,1989,16(4):1-8. [4] 蒋有录.油气藏盖层厚度与所封盖烃柱高度关系问题探讨[J].天然气工业,1998,18(2):20-23. [5] 付广,陈章明,吕延防,等.泥质岩盖层封盖性能综合评价方法探讨[J].石油实验地质,1998,20(1):80-86. [6] 付广,吕延防.天然气扩散作用的研究方法[M].北京:石油工业出版社,1999:1-99. [7] 付广,吕延防,付晓飞,等.断陷盆地源盖断时空匹配对油气成藏的控制作用[J].油气地质与采收率,2004,11(5):17-20. [8] 付广,孟庆芬,祝彦贺.断裂对乌尔逊凹陷油气成藏与分布的控制作用[J].油气地质与采收率,2005,12(1):33-35. [9] 康德江,付广,吕延防.贝尔断陷布达特群泥岩盖层综合评价[J].油气地质与采收率,2006,13(5):44-46. [10] 陈荣书.石油及天然气地质学[M].武汉:中国地质大学出版社,1993. [11] 李国平,石强,王树寅.储盖组合测井解释方法研究[J].测井技术,1997,20(2):98-104. [12] 焦翠华,谷云飞.测井资料在盖层评价中的应用[J].测井技术,2004,28(1):14-16. -
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