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| 塔里木盆地哈得逊油田石炭系地层水化学特征及成因 | |
| 引用本文： | 林晓英,曾溅辉,杨海军,张宝收,曲正阳.塔里木盆地哈得逊油田石炭系地层水化学特征及成因[J].现代地质,2012,26(2):377-383. |
| 作者姓名： | 林晓英 曾溅辉 杨海军 张宝收 曲正阳 |
| 作者单位： | 1. 中国石油大学油气资源与探测国家重点实验室,北京102249;河南理工大学能源科学与工程学院,河南焦作454000 2. 中国石油大学油气资源与探测国家重点实验室,北京,102249 3. 中国石油塔里木油田公司,新疆库尔勒,841000 |
| 基金项目： | 国家自然科学基金项目，塔里木油田公司项目 |
| 摘 要： | 塔里木盆地哈得逊油田石炭系地层水化学分析结果表明,地层水是以阴阳离子分别为Cl-和(Na++K+)为主的CaCl2型水,具有高矿化度特征(112～291 g/L)。地层水的钠氯系数均值为0.78,脱硫酸系数均值为0.23,Schoeller碱交换指数(IBE)均值为128。地层水化学参数在平面上相对变化不大,在剖面上随深度的增加,HCO3-、SO42-含量具有减小的趋势,而其他离子变化相对较小,表明研究区内的地层水形成于深部封闭环境条件下。地层水化学分析表明,该区地层水经历了强烈的阳离子交替吸附和水岩相互作用。(铁)白云石化作用导致了Ca2+的富集和Mg2+的亏损,形成了现今的地层水离子分布特征。石炭系地层水在构造反转油气藏调整时期一直处于相对封闭的流体动力环境中,这种环境有利于油气的聚集与保存。 |
| 关 键 词： | 哈得逊油田 石炭系 地层水化学特征 地层水成因 流体岩石相互作用 |
Geochemical Characteristics and Origin of Formation Water from the Carboniferous in Hadson Oil Field, Tarim Basin |
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| LIN Xiao-ying , ZENG Jian-hui , YANG Hai-jun , ZHANG Bao-shou , QU Zheng-yang.Geochemical Characteristics and Origin of Formation Water from the Carboniferous in Hadson Oil Field, Tarim Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2012,26(2):377-383. | |
| Authors: | LIN Xiao-ying ZENG Jian-hui YANG Hai-jun ZHANG Bao-shou QU Zheng-yang |
| Institution: | 1(1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China; 2.School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China; 3.Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China) |
| Abstract: | Based on the test of Carboniferous formation water in Hadson oil field of Tarim Basin,the geochemistry and origin of formation water were analyzed.The main chemical compositions are dominated by anion Cl-and cation(Na++K+).These waters are of CaCl2 type with high TDS(112 g/L to 291 g/L).The average sodium to chloride coefficient of formation water is 0.78,the average de-sulfate coefficient is 0.23,and the average cation exchange index(IBE)is 128.The chemical parameters of formation water vary little in the plane.Vertically,the concentrations of HCO-3 and SO2-4 have a tendency to decrease with increasing depth,but the concentrations of other ions keep constant,indicating that the formation water was formed in deep closed condition.The chemical characteristics of formation water show that the formation water experienced strong cationic alternate adsorption and water-rock interaction.The dolomitization(ferrodolomite)led to the excess of Ca2+ and the deficit of Mg2+,forming present ion distribution characteristics of formation water.The Carboniferous formation water has been in a relatively closed fluid dynamic environment during the petroleum reservoirs adjustment period,which is favorable for oil and gas accumulation and preservation. |
| Keywords: | Hadson oil field Carboniferous geochemistry characteristics of formation water origin of formation water fluid-rock interaction |
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