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

孙祥飞; 陈勇; 王成军; 王鑫涛

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

中国石油大学(华东)地球科学与技术学院, 山东青岛 266580

基金项目:

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

详细信息

作者简介:
孙祥飞(1990-), 男, 山东省烟台人, 硕士研究生, 地质学专业。E-mail:770336499@qq.com

中图分类号: P542
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- 被引次数: 0
出版历程
- 收稿日期: 2014-07-22
- 刊出日期: 2014-12-01

THE EFFECT OF SALT-GYPSUM DEHYDRATION ON THE DEVELOPMENT OF SALT DIAPIR: A CASE STUDY OF DONGYING SAG

College of Geo-resources and Information, China University of Petroleum, Qingdao 266580, China

摘要

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。
- 东营凹陷 /
- 盐底辟构造 /
- 膏盐脱水作用
Abstract: 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.
- Dongying sag /
- salt diapir /
- salt-gypsum dehydration

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图 1 东营凹陷构造分区图(据文献[19]，有修改)

Figure 1. Structural scheme of Dongying sag

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图 2 东营凹陷郝科1井南北向地震剖面图

Figure 2. South-north seismic cross-section of HK1 in Dongying sag

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图 3 流体作用在岩盐颗粒边缘形成的盐水包裹体群

Figure 3. Aqueous fluid inclusions assemblage in the edge of grain because of fluid process

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图 4 东营凹陷东风5-东风1-东风3-东风2地震剖面

Figure 4. Seismic cross-section of DF5-DF1-DF3-DF2 in Dongying sag

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图 5 东营凹陷沙四段盐底辟构造演化模型图

Figure 5. The tectonic evolution model of salt diapir in the fourth Member of Shahejie Formation in Dongying sag

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表 1 膏盐层厚度数据表

Table 1. The data sheet of thickness for gypsum-salt strata

井号	石膏岩	泥膏岩	石膏质泥岩	含膏泥岩	盐膏岩	膏盐岩	含膏盐岩	岩盐	泥盐岩	盐质泥岩	含盐泥岩	含盐含膏泥岩	泥质盐膏岩	石膏质白云岩
东风1	140.50	-	-	-	-	-	-	167.50	-	-	-	-	-	-
东风2	189.00	-	-	-	-	-	-	16.50	-	-	-	-	-	-
东风3	6.50	20.50	-	4.00	-	11.50	-	44.50	12.50	-	-	-	-	-
东风5	4.55	5.11	-	338.84	-	21.65	-	47.61	41.13	19.97	-	-	-	0.05
东风8	-	266.50	-	18.50	-	44.00	-	57.00	14.00	34.00	-	33.00	-	-
新东风10	3.00	137.00	34.50	95.50	-	32.00	14.00	43.00	2.50	1.00	-	1.00	-	-
丰8	21.00	13.00	115.00	171.50	-	82.00	-	1.00	-	18.00	-		-	-
丰深1	65.00	3.00	35.90	72.30	-		-	61.00	-	12.50	-	18.00	-	-
丰深2	15.50	230.50	112.50	147.00	162	36.00	-	375.57	-	110.19	73.54	24.70	-	-
丰深3	44.50	-	-	34.00	-	21.50	-	187.50	-	18.00	-	15.00	-	-
丰深4	5.50	36.50	34.50	45.70	-	42.00	-	37.00	-	9.00	-	-	-	-
丰深5	3.00	11.00	44.50	48.70	79	22.50	-	83.00	-	41.00	9.50	14.50	8.50	-
郝科1	18.00	26.50	25.20	257.80	-	47.00	39.00	185.50	-	7.00	17.50	7.50	-	-

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