油田水离子参数与原油保存有利环境研究  

Relationship of Oilfield Water Parameters and Favorable Conditions for Preservation of Crude Oil

作　　者：吴颖昊 吴兆徽[1,2] 徐守余 吴进喜[3] 王子松 丁烽妮 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266555 [2]中石化胜利油田勘探开发研究院,山东东营257002 [3]中石化胜利油田鲁胜石油开发有限公司,山东东营257000 [4]中石化华北石油工程有限公司,河南郑州450006

出　　处：《当代化工》2016年第8期1674-1676,1680,共4页Contemporary Chemical Industry

基　　金：国家重大油气专项"复杂油气藏精细表征及剩余油分布预测";项目号:2011ZX05009-005

摘　　要：在低油价的新常态新形势下,水动力充足,且具有良好油田水条件的中浅层油藏,逐渐成为了油田开发的重点,然而开发上对油田水成分特征的深入分析比较欠缺,各项离子参数与原油保存关系也模糊不清。为此,在深入分析油田水成分的基础上,分析了水型分布、钠氯系数、脱硫系数情况,比较了油田水矿化度和埋深的关系,找出了油田水与原油保存条件之间的关系,发现总矿化度和钠氯系数存在着较好的对应关系,较低的矿化度常对应较高的钠氯系数,即对原油保存有利的地区。高矿化度Na HCO3型和Na2SO4型水区,是寻找次生油藏的有利区域,此外,总矿化度高值、钠氯系数低值是有利于原油保存的重要地区。通过明确油田水特征,对利用油田水离子参数反推原油保存的有利区域具有重要意义。Under current situation of low oil price, shallow-middle depth reservoirs with enough pressure have become the focus during oilfield development. However, in-depth analyses on the characteristics of oilfield water compositions are still lacked. The relationship of geochemical parameters and oil preservation conditions is also unclear. Therefore, based on in-depth analysis of oilfield water compositions, water distributions, sodium chloride coefficient and desulfurization coefficient were analyzed, the relationship of the salinity and depth was compared. The relationship between oilfield water and oil preservation conditions was discussed. It＇s found that the total salinities have close relationship with sodium chloride coefficients. Low salinity always corresponds to high sodium chloride coefficient, which is a favorable area for oil preservation. High salinity NaHCO3 and Na2SO4 regions are favorable areas for the search of secondary oil reservoirs. Additionally, high value area of total salinity and low value area of chlorine coefficient are important places for the preservation of crude oil. Through the analysis of oilfield water characteristics, it is important to choose favorable oil preservation regions by using proper parameters.

关 键 词：油田水 矿化度 脱硫系数 钠氯系数 原油保存 

分 类 号：TE124[石油与天然气工程—油气勘探]