摘要
利用大庆油田特殊的地质构造，将氰化物浓度０．０５ｍｇ／Ｌ的含氰废水注入油田边水构造。通过储层砂体吸附和渗透率损害实验，证明储层对氰化物有吸附作用，不同平衡浓度下砂体的静态吸附量为４．８８μｇ／ｇ，动态吸附量为２．８３７μｇ／ｇ，氰化物不堵塞地层，根据注入井与注入井、注入井与采油井之间距离的不同，共布设８种注入方案。设计注入井的注入量为２１０ｍ３／ｄ，采油井的产液量为１０５ｍ３／ｄ，以采油井采出氰化物浓度０．０５ｍｇ／Ｌ为限定值，基于动态吸附实验结果和边水对氰化物的稀释作用，应用聚合物驱油模型计算最佳的注入方案，该方案为注入井之间的间距１．０ｋｍ，注入井与采油井之间的间距为２．５ｋｍ，注入年限为５４年。研究结果表明，在大庆油田实施含氰废水的深井注入是可行的。既达到处理含氰废水的目的，又利用含氰废水驱替原油，具有实用价值和推广作用。
This study takes advantage of the special geological structure in Daqing oil field. The cyanide containingwastewater with concentration 0.05mg/L is injected into the edge water of oil field.With sand adsorption and permeabil-ity tests in the store formation, it is demonstrated that the store formation adsorbs the cyanide. The sand adsorption quan-tity is 4.88μg/g in different static balance concentrations and 2.837μg/g in the dynamic state. The cyanide does not blockstore formation. In accordance with the distances between the injection wells and between the injection and the extractionwells,eight injection projects are designed. The injection quantity designed is 210m3/d;the extraction quantity designed is105m3/d;and the extraction limitation is controlled to 0.05mg/L. Based on the results of dynamic adsorption test and thedilution of the cyanide in the edge water, the optimum injection project is calculated with the polymer drive mode of thisprofect,the distance between injection-wells is 1.0 kin, the distance between the injection and the extraction wells is 2.5km,and the injection length is 54 years. The research results demonstrate it is feasible to carry out the deep well injection ofthe cyanide containing wastewater in Daqing oil field. In this manner,both the purpose of disposal of cyanide containingwastewater and driving the oil with it are attained.It has high practical value to put into use and popularize.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
1999年第2期185-188,共4页
China Environmental Science
关键词
油田
含氰废水
深井注入
技术论证
废水处理
Daqing oilfield
cyanide containing wastewater
deep well injection
technological demonstration
