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膏盐脱水在盐底辟发育过程中的作用分析——以东营凹陷为例 被引量:1

THE EFFECT OF SALT-GYPSUM DEHYDRATION ON THE DEVELOPMENT OF SALT DIAPIR: A CASE STUDY OF DONGYING SAG
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摘要 基于国内外已经取得的盐构造研究成果,根据东营凹陷盐构造的发育特征,指出流体在盐构造发育过程的重要作用。东营凹陷沙四段含有大量膏盐和含膏地层,根据岩心、测井和地震等资料分析了东营凹陷盐构造特征。由于膏盐脱水作用会导致地层内部产生异常高压,而异常高压可以作为动力迫使流体向上流动继而在上覆地层产生水压力裂缝,流体上涌过程中可以带动盐类物质向上运动,因此认为膏盐脱水对盐构造形成发育有重要作用。基于膏盐脱水和超压流体作用,建立了东营凹陷沙四段盐底辟构造发展史模型,分析了东营凹陷盐构造在流体作用下形成发育过程,结果表明膏盐脱水在盐构造发育初期和中期具有重要作用。 There is a series of achievements about salt tectonics both at home and abroad. This paper points out that fluid in the tectonics development of the important role of salt, which is based on previous studies and the developmental characteristics of salt tectonics in Dongying sag. It contains a lot of salt.gypsum and salt.gypsum formations. This paper analyzes the characteristic of the salt tectonics according to the core, logging and seismic data. Abnormal high pressure created by salt.gypsum dehydration in stratum, high pressure can be used as a dynamic force fluid flow upward and this contributes to hydraulic fracturing in the overlying strata and can drive the salts material in the process of fluid upwelling upward movement. This paper proposes that salt.gypsum dehydration has an important influence on the formation of the salt tectonics. Based on the effect of salt.gypsum dehydration and overpressure fluid, the history of model of member 4 of Shahejie Formation salt diapir in Dongying sag is established according to seismic cross.section and logging data. Salt tectonics is analyzed during the migration of fluids in the process of development, salt.gypsum dehydration effect in early and mid.salt tectonic development important role.
出处 《地质力学学报》 CSCD 2014年第4期446-454,共9页 Journal of Geomechanics
基金 国家自然科学基金项目(41172111) 山东省优秀中青年科学家奖励基金项目(BS2012NJ014) 中央高校基本科研业务费专项资金项目(SD2013211151)
关键词 东营凹陷 盐底辟构造 膏盐脱水作用 Dongying sag salt diapir salt-gypsum dehydration
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