柴西下干柴沟组湖相白云岩特征及成因分析

张小军; 张世铭; 苟迎春; 曹堂路; 王朴; 崔俊; 吴梁宇; 伍坤宇

doi:10.14027/j.issn.1000-0550.2018.177

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柴西下干柴沟组湖相白云岩特征及成因分析

张小军, 张世铭, 苟迎春, 曹堂路, 王朴, 崔俊, 吴梁宇, 伍坤宇

文章导航 > 沉积学报 > 2019 > 37(4): 785-797

张小军, 张世铭, 苟迎春, 曹堂路, 王朴, 崔俊, 吴梁宇, 伍坤宇. 柴西下干柴沟组湖相白云岩特征及成因分析[J]. 沉积学报, 2019, 37(4): 785-797. doi: 10.14027/j.issn.1000-0550.2018.177

引用本文:

ZHANG XiaoJun, ZHANG ShiMing, GOU YingChun, CAO TangLu, WANG Pu, CUI Jun, WU LiangYu, WU KunYu. Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 785-797. doi: 10.14027/j.issn.1000-0550.2018.177

Citation:

ZHANG XiaoJun, ZHANG ShiMing, GOU YingChun, CAO TangLu, WANG Pu, CUI Jun, WU LiangYu, WU KunYu. Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 785-797. doi: 10.14027/j.issn.1000-0550.2018.177

引用本文:

Citation:

ZHANG XiaoJun, ZHANG ShiMing, GOU YingChun, CAO TangLu, WANG Pu, CUI Jun, WU LiangYu, WU KunYu. Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 785-797. doi: 10.14027/j.issn.1000-0550.2018.177

柴西下干柴沟组湖相白云岩特征及成因分析

doi: 10.14027/j.issn.1000-0550.2018.177

张小军^1,2,
张世铭^1,2,
苟迎春^1,2,
曹堂路³,
王朴^1,2,
崔俊⁴,
吴梁宇^1,2,
伍坤宇⁴

1.
中国石油勘探开发研究院西北分院, 兰州 730020;
2.
中国石油天然气集团公司油藏描述重点实验室, 兰州 730020;
3.
中国石油青海油田分公司采油三厂, 青海海西 816400;
4.
中国石油青海油田分公司勘探开发研究院, 甘肃敦煌 736202

基金项目: 国家重大科技专项（2016ZX05003-006）；中国石油重大科技项目（2017D-5006-17）

详细信息

作者简介:
张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

中图分类号: P588.24⁺5

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文章访问数: 270
HTML全文浏览量: 11
PDF下载量: 166
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Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin

1.
PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China;
2.
Key Laboratory of Reservoir Characterization, CNPC, Lanzhou 730020, China;
3.
NO.3 Oil Extraction Factory, Qinghai Oilfield Company, CNPC, Haixi, Qinghai 816400, China;
4.
Research Institute of Exploration & Development of Qinghai Oilfield Company, CNPC, Dunhuang, Gansu 736202, China

Funds: National Science and Technology Major Project, No. 2016ZX05003-006; China Petroleum Science and Technology Major Project, No. 2017D-5006-17

摘要

摘要: 对柴达木盆地西部地区下干柴沟组湖相白云岩的岩石组构、矿物成分、主微量元素地球化学及碳氧同位素特征进行研究，并分析白云岩成因。研究区白云岩沉积环境为浅水相对封闭湖相环境，白云岩以泥晶白云岩为主，层状、块状分布，见藻云岩、膏质白云岩及颗粒云岩，有序度普遍较低。主量元素中Mg²⁺/Ca²⁺比值低，Mn、Fe、Na、Sr元素含量高，指示沉积环境水体盐度较高和相对封闭；微量元素中稀土元素具有轻稀土相对富集、Eu负异常特征，反映低温浅埋藏的成岩环境；氧同位素为较低的负值，反映整体咸化水体特征，碳同位素为较低的正值或负值，主要是受到大气水影响和生物的影响。研究认为白云石形成于准同生期相对封闭咸化环境中，白云石化流体中Mg²⁺主要来源于大气水的淋滤和深部卤水，少数来自于藻类的分解；Mg²⁺通过蒸发、盐类矿物沉淀而富集，富Mg²⁺流体通过回流渗透交代方解石发生白云石化。
- 柴达木盆地西部 /
- 湖相白云岩 /
- 回流渗透白云石化
Abstract: The rock fabric,mineral composition,main trace-element geochemistry and carbon and oxygen isotopic characteristics of lacustrine dolomite in the Lower Ganchaigou Formation of the Qaidam Basin were studied,and the origin of the dolomite was analyzed. The sedimentary environment of dolomite in the study area was shallow water and a relatively closed lacustrine environment. The dolomite is predominantly micritic,and occurs in layers and blocks. It is seen as algal,gypsiferous,and grain dolomite. The degree of ordering is generally low. The ratio of Mg²⁺ to Ca²⁺ is low. The Mn,Fe,Na and Sr contents are all high in the major elements,indicating that the water body was highly sa-line and that it was relatively closed. Light rare earth elements among the trace elements are relatively enriched,with negative europium anomalies,reflecting a low-temperature diagenetic environment and shallow burial. Oxygen iso-topes have a low negative value,indicative of salinized water overall. Carbon isotopes are low-positive or negative, mainly due to atmospheric water and biological effects. The study suggests that the dolomite was formed penecontem-poraneously in a relatively closed saline water environment. The Mg²⁺ in the dolomitic fluid is mainly derived from leaching by atmospheric water and deep brine,with a small amount from algal decomposition. The Mg²⁺ was enriched by evaporation and salt mineral precipitation,and the enriched fluid was dolomitized by seepage-reflux infiltration of calcite.
- western Qaidam Basin /
- lacustrine dolomites /
- seepage-reflux dolomitization

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[1]	田辰, 胡广. 川南茅一段白云石化过程及其对眼球状灰岩形成的指示——以DB1井为例 . 沉积学报, 2024, (): -. doi: 10.14027/j.issn.1000-0550.2024.0045
[2]	王剑, 周路, 刘金, 马聪, 卞保力, 李啸, 张宝真. 湖相热液白云岩成因机理 . 沉积学报, 2024, 42(1): 130-141. doi: 10.14027/j.issn.1000-0550.2022.037
[3]	陈琰, 夏晓敏, 赵健, 崔俊, 乔柏瀚, 赵东升, 高红灿, 王义, 谭莉. 柴达木盆地西部地区新近系藻灰岩沉积特征及形成机制 . 沉积学报, 2022, 40(5): 1323-1334. doi: 10.14027/j.issn.1000-0550.2021.056
[4]	王珏博, 谷一凡, 陶艳忠, 强子同, 强深涛, 蒋婵. 川中地区茅口组两期流体叠合控制下的白云石化模式 . 沉积学报, 2016, 34(2): 236-249. doi: 10.14027/j.cnki.cjxb.2016.02.003
[5]	. 白云石成因研究新方法——白云石晶体结构分析 . 沉积学报, 2014, 32(3): 550-559.
[6]	. 塔里木盆地寒武系鞍状白云石孔隙充填物差异与成因 . 沉积学报, 2014, 32(2): 253-259.
[7]	. “白云石（岩）问题”与湖相白云岩研究 . 沉积学报, 2013, 31(2): 302-314.
[8]	王丹. 埋藏环境白云石结构类型 . 沉积学报, 2010, 28(1): 17-25.
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[10]	柳益群. 白云岩成因探讨：新疆三塘湖盆地发现二叠系湖相喷流型热水白云岩 . 沉积学报, 2010, 28(5): 861-867.
[11]	张军涛. 塔里木盆地中央隆起区上寒武统—下奥陶统白云岩储层中两类白云石充填物：特征与成因 . 沉积学报, 2008, 26(6): 957-966.
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[19]	张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制 . 沉积学报, 2000, 18(3): 424-430.
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柴西下干柴沟组湖相白云岩特征及成因分析

doi: 10.14027/j.issn.1000-0550.2018.177

1. 中国石油勘探开发研究院西北分院, 兰州 730020;

2. 中国石油天然气集团公司油藏描述重点实验室, 兰州 730020;

3. 中国石油青海油田分公司采油三厂, 青海海西 816400;

4. 中国石油青海油田分公司勘探开发研究院, 甘肃敦煌 736202

基金项目: 国家重大科技专项（2016ZX05003-006）；中国石油重大科技项目（2017D-5006-17）

作者简介:
张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

收稿日期: 2018-09-17
修回日期: 2018-11-21
刊出日期: 2019-08-10

中图分类号: P588.24⁺5

关键词:

柴达木盆地西部 /

湖相白云岩 /

回流渗透白云石化

摘要: 对柴达木盆地西部地区下干柴沟组湖相白云岩的岩石组构、矿物成分、主微量元素地球化学及碳氧同位素特征进行研究，并分析白云岩成因。研究区白云岩沉积环境为浅水相对封闭湖相环境，白云岩以泥晶白云岩为主，层状、块状分布，见藻云岩、膏质白云岩及颗粒云岩，有序度普遍较低。主量元素中Mg²⁺/Ca²⁺比值低，Mn、Fe、Na、Sr元素含量高，指示沉积环境水体盐度较高和相对封闭；微量元素中稀土元素具有轻稀土相对富集、Eu负异常特征，反映低温浅埋藏的成岩环境；氧同位素为较低的负值，反映整体咸化水体特征，碳同位素为较低的正值或负值，主要是受到大气水影响和生物的影响。研究认为白云石形成于准同生期相对封闭咸化环境中，白云石化流体中Mg²⁺主要来源于大气水的淋滤和深部卤水，少数来自于藻类的分解；Mg²⁺通过蒸发、盐类矿物沉淀而富集，富Mg²⁺流体通过回流渗透交代方解石发生白云石化。

English Abstract

Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin

1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China;

2. Key Laboratory of Reservoir Characterization, CNPC, Lanzhou 730020, China;

3. NO.3 Oil Extraction Factory, Qinghai Oilfield Company, CNPC, Haixi, Qinghai 816400, China;

4. Research Institute of Exploration & Development of Qinghai Oilfield Company, CNPC, Dunhuang, Gansu 736202, China

Funds: National Science and Technology Major Project, No. 2016ZX05003-006; China Petroleum Science and Technology Major Project, No. 2017D-5006-17

Received Date: 2018-09-17
Rev Recd Date: 2018-11-21
Publish Date: 2019-08-10

Keywords:

Abstract: The rock fabric,mineral composition,main trace-element geochemistry and carbon and oxygen isotopic characteristics of lacustrine dolomite in the Lower Ganchaigou Formation of the Qaidam Basin were studied,and the origin of the dolomite was analyzed. The sedimentary environment of dolomite in the study area was shallow water and a relatively closed lacustrine environment. The dolomite is predominantly micritic,and occurs in layers and blocks. It is seen as algal,gypsiferous,and grain dolomite. The degree of ordering is generally low. The ratio of Mg²⁺ to Ca²⁺ is low. The Mn,Fe,Na and Sr contents are all high in the major elements,indicating that the water body was highly sa-line and that it was relatively closed. Light rare earth elements among the trace elements are relatively enriched,with negative europium anomalies,reflecting a low-temperature diagenetic environment and shallow burial. Oxygen iso-topes have a low negative value,indicative of salinized water overall. Carbon isotopes are low-positive or negative, mainly due to atmospheric water and biological effects. The study suggests that the dolomite was formed penecontem-poraneously in a relatively closed saline water environment. The Mg²⁺ in the dolomitic fluid is mainly derived from leaching by atmospheric water and deep brine,with a small amount from algal decomposition. The Mg²⁺ was enriched by evaporation and salt mineral precipitation,and the enriched fluid was dolomitized by seepage-reflux infiltration of calcite.

引用本文:

Citation:

ZHANG XiaoJun, ZHANG ShiMing, GOU YingChun, CAO TangLu, WANG Pu, CUI Jun, WU LiangYu, WU KunYu. Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin[J]. Acta Sedimentologica Sinica, 2019, 37(4): 785-797. doi: 10.14027/j.issn.1000-0550.2018.177

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柴西下干柴沟组湖相白云岩特征及成因分析

doi: 10.14027/j.issn.1000-0550.2018.177

作者简介:
张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

计量

Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin

计量

目录

柴西下干柴沟组湖相白云岩特征及成因分析

doi: 10.14027/j.issn.1000-0550.2018.177

1. 中国石油勘探开发研究院西北分院, 兰州 730020;

2. 中国石油天然气集团公司油藏描述重点实验室, 兰州 730020;

3. 中国石油青海油田分公司采油三厂, 青海海西 816400;

4. 中国石油青海油田分公司勘探开发研究院, 甘肃敦煌 736202

作者简介:
张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

English Abstract

Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin

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柴西下干柴沟组湖相白云岩特征及成因分析

doi: 10.14027/j.issn.1000-0550.2018.177

作者简介: 张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

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出版历程

Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin

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出版历程

目录

柴西下干柴沟组湖相白云岩特征及成因分析

doi: 10.14027/j.issn.1000-0550.2018.177

1. 中国石油勘探开发研究院西北分院, 兰州 730020; 2. 中国石油天然气集团公司油藏描述重点实验室, 兰州 730020; 3. 中国石油青海油田分公司采油三厂, 青海海西 816400; 4. 中国石油青海油田分公司勘探开发研究院, 甘肃敦煌 736202

作者简介: 张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

English Abstract

Characteristics and Origin Analysis of Lacustrine Dolomites in the Lower Ganchaigou Formation, Western Qaidam Basin

全文HTML

目录

友情链接

期刊在线

联系我们

作者简介:
张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn

1. 中国石油勘探开发研究院西北分院, 兰州 730020;

2. 中国石油天然气集团公司油藏描述重点实验室, 兰州 730020;

3. 中国石油青海油田分公司采油三厂, 青海海西 816400;

4. 中国石油青海油田分公司勘探开发研究院, 甘肃敦煌 736202

作者简介:
张小军,男,博士,高级工程师,石油地质综合研究,E-mail:xj_zhang@petrochina.com.cn