渤海湾盆地济阳坳陷沙河街组四段地层水特征及成盐指示
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摘要
济阳坳陷是渤海湾盆地发育厚层含盐系地层的坳陷之一,其地层水的特征是研究中国东部裂谷系湖盆演化及成盐规律的重要媒介。济阳坳陷沙河街组地层水矿化度平均值从沙四段的41.2g/L向浅部逐渐降低到14.2g/L,反映了咸化湖盆逐渐淡化的趋势。沙河街组四段主要离子浓度与矿化度的关系表明,湖盆演化主要处于石盐析出阶段,且地层水物质组成具有富钙贫镁的特征。在平面上,东营凹陷矿化度最高,湖水经历了高度浓缩,在靠近陡坡带一侧的洼陷部位为地层水的高值区,发育厚层膏盐岩,向缓坡带一侧受陆源水系影响逐渐淡化。靠近陡坡带一侧的洼陷部位是成盐的有利区域,并具备形成富钾卤水矿的条件。
Jiyang depression is one of the depressions of the Bohai Bay Basin,which developed a thick layer of saliferous strata.The characteristics of formation water is an important medium to study the lacustrine basin evolution and salification mechanism of the rift system in Eastern China.The average salinity of formation water gradually decreased from 41.2g/L in Sha-4Member to 14.2g/L in Sha-1Member,reflecting the trend of the gradually fading of the salinized lake.The relations between the major ion concentrations and the salinity of Sha-4Member show that the evolution of the lake basin is at the stage of halite crystallization,and the composition of the formation water shows the characteristics of magnesium-depleted and calcium-enriched.In the plane,the Dongying sag has the highest salinity,where the lake water has been highly concentrated.Especially the depression area proximate to the steep slope is the high value area of the formation water salinity,where developed the thick plaster salt rocks.In the mild slope side,affected by the land river,the salinization gradually faded.Close to the steep slope side of the sag is the favorable area for salt formation.If the potassium source material is sufficient,the potassium rich bittern deposit could be formed.
Jiyang depression is one of the depressions of the Bohai Bay Basin,which developed a thick layer of saliferous strata.The characteristics of formation water is an important medium to study the lacustrine basin evolution and salification mechanism of the rift system in Eastern China.The average salinity of formation water gradually decreased from 41.2g/L in Sha-4Member to 14.2g/L in Sha-1Member,reflecting the trend of the gradually fading of the salinized lake.The relations between the major ion concentrations and the salinity of Sha-4Member show that the evolution of the lake basin is at the stage of halite crystallization,and the composition of the formation water shows the characteristics of magnesium-depleted and calcium-enriched.In the plane,the Dongying sag has the highest salinity,where the lake water has been highly concentrated.Especially the depression area proximate to the steep slope is the high value area of the formation water salinity,where developed the thick plaster salt rocks.In the mild slope side,affected by the land river,the salinization gradually faded.Close to the steep slope side of the sag is the favorable area for salt formation.If the potassium source material is sufficient,the potassium rich bittern deposit could be formed.
引文
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[2]邱楠生,苏向光,李兆影,等.济阳坳陷新生代构造-热演化历史研究[J].地球物理学报,2006,49(4):1127-1135.
[3]周心怀,余一欣,汤良杰,等.渤海海域新生代盆地结构与构造单元划分[J].中国海上油气,2010,22(5):285-289.
[4]肖焕钦,孙锡年,汤冬梅,等.济阳坳陷拗陷期构造带划分及其石油地质意义[J].中国石油勘探,2009,14(1):30-34.
[5]冯有良,周海民,任建业,等.渤海湾盆地东部古近系层序地层及其对构造活动的响应[J].中国科学:地球科学,2010,40(10):1356-1376.
[6]操应长,王健,高永进,等.济阳坳陷东营凹陷古近系红层-膏盐层沉积特征及模式[J].古地理学报,2011,13(4):375-386.
[7]杨金湖,刘长学,朱峰.华北成盐区蒸发岩形成的构造环境[J].化工矿产地质,1985(3):53-61.
[8]关绍曾,江宗龙,魏东岩,等.中国板块构造与盐类矿产[J].化工矿产地质,1996,18(2):73-81.
[9]漆家福.渤海湾新生代盆地的两种构造系统及其成因解释[J].中国地质,2004,31(1):15-22.
[10]漆家福,张一伟,陆克政,等.渤海湾盆地新生代构造演化[J].石油大学学报:自然科学版,1995,19(增刊):1-6.
[11]陈清华,陈诗望,黄超.渤海湾盆地成因类型评介[J].油气地质与采收率,2004,11(6):1-2.
[12]曾溅辉.东营凹陷第三系流体物理化学场及其演化特征[J].地质论评,2000,46(2):212-219.
[13]孙向阳,解习农.东营凹陷地层水化学特征与油气聚集关系[J].石油实验地质,2001,23(3):291-296.
[14]陈中红,查明,刘太勋.东营凹陷古近系古湖盆演化与水化学场响应[J].湖泊科学,2008,20(6):705-714.
[15]钱诗友,曾溅辉.东营凹陷沙河街组地层水化学特征及其石油地质意义[J].天然气地球科学,2009,20(4):604-609.
[16]邸晓君.东营凹陷油田水的油气运聚指向性研究[J].断块油气田,2010,17(2):142-145.
[17]Kloppmann W,Négrel P,Casanova J,et al.Halitedissolution derived brines in the vicinity of a Permian salt dome(N 330赵艳军,刘成林,靳彩霞,等/地学前缘(Earth Science Frontiers)2014,21(4)http://www.earthsciencefrontiers.net.cn地学前缘,2014,21(4)German Basin):Evidence from boron,strontium,oxygen and hydrogen isotopes[J].Geochimica et Cosmochimica Acta,2001,65:4087-4101.
[18]Volker L,Birgit P,Rolf L R,et al.Chemistry and isotopic composition of Rotliegend and Upper Carboniferous formation waters from the North German Basin[J].Chemical Geology,2010,276:198-208.
[19]刘晓峰,解习农.与盐构造相关的流体流动和油气运聚[J].地学前缘,2001,8(4):343-349.
[20]何更生.油层物理[M].北京:石油工业出版社,1993:170-175.
[21]孙向阳.沉积盆地中地层水化学特征及其地质意义[J].天然气勘探与开发,2001,24(4):47-53.
[22]陈郁华.黄海水25℃恒温蒸发时的析盐序列及某些微量元素的分布规律[J].地质学报,1983(4):379-389.
[23]李丕龙,张善文,曲寿利,等.陆相断陷盆地油气地质与勘探[M].北京:石油工业出版社,2003:249-255.
[24]苏新,丁旋,姜在兴,等.用微体古生物定量水深法对东营凹陷沙四上亚段沉积早期湖泊水深再造[J].地学前缘,2012,19(1):188-199.
[25]吴必豪,刘群,蔡克勤,等.中国钾盐成矿条件与国外典型矿床的对比研究[R].北京:地质矿产部矿床研究所研究报告,1995.
[26]钟筱春,钟石兰,费轩冬.渤海湾盆地沙河街组一段颗石藻类化石及其沉积环境[J].微体古生物学报,1988,5(2):145-151.
[27]李成凤,肖继风.用微量元素研究胜利油田东营盆地沙河街组的古盐度[J].沉积学报,1988,6(4):100-107.
[28]孙钰,钟建华,袁向春.惠民凹陷沙河街组一段白云岩特征及其成因分析[J].沉积与特提斯地质,2007,27(3):78-84.
[29]袁波,陈世悦,袁文芳,等.济阳坳陷沙河街组锶硫同位素特征[J].吉林大学学报:地球科学版,2008,38(4):613-617.
[30]陈中红,查明,金强.典型蒸发岩与泥岩共生沉积体系中元素及烃类物质响应[J].地质学报,2009,83(3):435-444.