西南石油大学学报(自然科学版) ›› 2013, Vol. 35 ›› Issue (2): 8-14.

• 地质勘探 • 上一篇    下一篇

东营沙四段古盐度对碳酸盐岩沉积的控制作用

宋国奇1,王延章2,石小虎3,路达4,闫瑞萍4   

  1. 1. 中国石化胜利油田分公司,山东东营257001;2. 中国石化胜利油田分公司胜利职业学院,山东东营257000;3. 中国石油长庆油田分公司勘探开发研究院,陕西西安710021;4. 中国石油辽河油田勘探开发研究院,辽宁盘锦124010
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-04-01 发布日期:2013-04-01

Palaeosalinity and its Controlling on the Development of Beachand Bar in Lake Facies

Song Guoqi1, Wang Yanzhang2, Shi Xiaohu3, Lu Da4, Yan Ruiping4   

  1. 1. Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257002,China2. Shengli Professional Academy in Shengli Oilfield Company,Dongying,Shandong 257000,China3. Exploration and Development Research Institute,Changqing Oilfield Company,PetroChina,Xi’an,Shaanxi 710021,China4. Exploration and Development Research Institute,Liaohe Oilfield,PetroChina,Panjin,Liaoning 124010,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-04-01 Published:2013-04-01

摘要: 以硼含量以及Sr/Ba、Sr/Ca 作为指标,计算了东营凹陷南坡沙四段各个沉积时期的古盐度值,盐度垂向上由
下到上总体上变小,即湖侵初期盐度较高,湖侵后期盐度变低;平面上东部较高,北部较低,盐度分布受到古水深的控
制。古盐度对不同类型的碳酸盐岩具有控制作用,碳酸盐岩所要求的古盐度范围为10.0 ‰ 35.0 ‰,其中白云岩主要
分布在古盐度大于15.0 ‰的区域,石灰岩主要分布在古盐度小于20.0 ‰的区域。水体的高盐度为白云岩的形成及成
岩转化提供了物质基础和介质条件,在古盐度较高的区域以白云岩沉积为主,或者将已经形成的石灰岩白云岩化;在
古盐度较低的区域以石灰岩沉积为主。

关键词: 古盐度, 沙四段, 白云岩, 石灰岩, 控制作用

Abstract: We make the content of Boron and the ratio of Sr/Ba、Sr/Ca the target,and calculate the palaeosalinity values
of sedimentation epoch in Sha 4 of the south slope in Dongying Depression. The palaeosalinity in vertical direction totally
decreases from down to up. The palaeosalinity is higher in early stage of lake invading and becomes lower in later stage. The
east is relatively higher in plane and the north is lower. The distribution of palaeosalinity is controlled by palaeowater-depth.
The palaeosalinity controls different types of carbonate rock and the palaeosalinity limits is in 10.0 ‰ 35.0 ‰. The dolomite is
mainly distributed in the area with palaeosalinity higher than 15.0 ‰ while the limestone is mainly distributes in the area lower
than 20.0 ‰. The high salinity of water supplies the material base and media condition for the dolomite formation and dolomitic
diagenetic change. In the area of high salinity the the primary deposition is dolomite,or formed limestone the dolomitisation,
the limestone deposition is primary in the area of low salinity.

Key words: palaeosalinity, brackish water, dolomite, limestone, controlling action