准噶尔盆地致密油岩心洗油技术探讨——以吉木萨尔凹陷芦草沟组致密油为例

发布时间：2018-06-01 18:02

本文选题：致密油岩心 + 抽水溶剂　；参考：《岩性油气藏》2016年06期

【摘要】：目前国内致密油储层岩心洗油技术普遍存在洗油周期长、洗油质量不能保证的问题,为此通过实验寻找更适合致密油岩心洗油的抽水溶剂、洗油溶剂及洗油方法。结果表明:针对致密油岩心应适当延长抽水时间,二甲苯可作为抽水溶剂,因其具有高沸点的特点抽水效果较好;酒精+苯+氯仿(体积比为1∶2∶2)混合溶剂浸出液含油率高(14%),可优选为致密油岩心洗油溶剂;加压饱和溶剂法和二氧化碳加压法在7~8次(14~16 d)洗油后,洗油溶剂的荧光级别均小于3级,而且岩心质量、孔隙度和渗透率均趋于稳定,达到标准SY/T 5336—2006要求,该方法较为适合准噶尔盆地致密油岩心洗油,具有推广价值。
[Abstract]:At present, the core washing technology of dense oil reservoirs in China generally has the problem of long oil washing period and the quality of oil washing can not be guaranteed. In order to find out the more suitable pumping solvent, oil washing solvent and oil washing method for dense oil core washing through experiments. The results show that xylene can be used as a pumping solvent to extend the pumping time of dense oil core, because of its high boiling point, the pumping effect is better. Alcohol benzene chloroform (volume ratio 1: 2: 2) has a high oil content of 14% and can be selected as a solvent for oil washing in dense oil cores. After washing the oil, the saturated solvent method and the carbon dioxide pressure method are used to wash the oil at 78 times for 1416 days. The fluorescence level of the oil washing solvent is less than 3, and the core quality, porosity and permeability tend to be stable, which meet the requirements of standard SY/T 5336-2006. This method is more suitable for oil washing in dense oil cores in Junggar Basin, and it is worth popularizing.
【作者单位】：中国石油新疆油田分公司实验检测研究院;
【基金】：中国石油天然气集团股份有限公司重大科技专项“二叠系致密油形成机理与勘探技术研究”(编号:2012E-34-02)资助
【分类号】：TE34

【相似文献】