注水后用化学剂和二氧化碳测量采油率的实验研究。
An experimental study to measure oil recovery factor by chemical agents and carbon dioxide after waterflooding.
机构信息
Department of Geology, Northwest University, Xian, 710069, Shaanxi, China.
School of Chemistry and Chemical Engineering, Yulin University, Yulin, 719000, Shaanxi, China.
出版信息
Sci Rep. 2022 Jun 8;12(1):9464. doi: 10.1038/s41598-022-13639-7.
Development of tight formations would be one of the main priority for petroleum industries due to the enormous demand to the fossil fuels in various industries. In this paper, we provided a set of experiments on the generated foams by carbon dioxide (CO) and nitrogen (N), cyclic CO injection, water alternating gas injection (WAG), active carbonated water injection (coupling surfactant effects and carbonated water (CW)), and introducing the impact of active carbonated water alternating gas injection (combination of WAG and CW injection) after waterflooding. Carbon dioxide is more feasible than nitrogen, it can be mobilize more in the pore throats and provided higher oil recovery factor. Generated foam with CO has increased oil recovery factor about 32% while it's about 28% for generated foam by N. Moreover, according to the results of this study, the maximum oil recovery factor for active carbonated water alternating gas injection, active carbonated water injection, and water alternating gas injection measured 74%, 65%, and 48% respectively.
由于各行业对化石燃料的巨大需求，致密地层的开发将是石油工业的主要重点之一。在本文中，我们提供了一系列关于二氧化碳（CO）和氮气（N）生成泡沫、循环 CO 注入、水气交替注入（WAG）、活性碳酸水注入（结合表面活性剂效应和碳酸水（CW））的实验，以及注水后引入活跃碳酸水交替注入（WAG 和 CW 注入的结合）的影响。二氧化碳比氮气更可行，它可以在孔隙喉道中更有效地移动，并提供更高的采油率。CO 生成的泡沫可提高采油率约 32%，而 N 生成的泡沫则提高约 28%。此外，根据这项研究的结果，活跃碳酸水交替注入、活跃碳酸水注入和水气交替注入的最大采油率分别为 74%、65%和 48%。
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