苏北盆地天然气藏地层水化学特征分析  

Hydrochemistry characteristics of groundwater of gas reservoir in Subei Basin

作　　者：刘东鹰[1] 

机构地区：[1]中国石油化工股份有限公司江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《复杂油气藏》2010年第1期6-9,共4页Complex Hydrocarbon Reservoirs

摘　　要：从苏北盆地地下水矿化度、各主要阴、阳离子毫克当量百分数以及水型变化分析研究中,发现地下水矿化度的不断增高,与各主要阴、阳离子毫克当量百分数变化有一定的规律关系,水型也由单一的NaHCO3型,变为多种水型。这些变化是地表淡水淋滤交替作用与深埋封存水的变质作用和脱硫作用的综合结果。通过对黄桥、刘庄和盐城等气藏地层水化学特征的分析,认为天然气藏的地层水具有矿化度高,变质系数低,水型好的特点。总结其规律,对天然气藏成藏条件的评价具有积极意义。According to analysis and study of groundwater salinity, major anions and cations in mg equivalent percentage, and water type change in Subei Basin, it is found that the continuous increase of groundwater salinity is to some extent relative to the change of major anions and cations in mg equivalent percentage. The water type of single NaHCO3 also turned into multiple types. These changes are the integrated results of surface fresh water leaching alternating, deep seal water metamorphism, and desulfurization. Based on analysis of hydrochemistry data of Huangqiao, Yancheng, and Liuzhuang gas fields, it is considered that the ground water has high salinity, low coefficient of metamorphism and good water type. Knowledge of these rules is significant to the evaluation of gas reservoir accumulation conditions.

关 键 词：地层水 化学特征 天然气藏 苏北盆地 

分 类 号：TE133.2[石油与天然气工程—油气勘探]