低渗透油田生物酶化学驱油技术  

Bioenzyme Chemical Oil Displacement Technology in Low Permeability Oil Fields

作　　者：韩浩 王巍 付勇峰 李阳洁 覃维波 赵隆辉 HAN Hao;WANG Wei;FU Yongfeng;LI Yangjie;QIN Weibo;ZHAO Longhui(PetroChina Qinghai Oilfield No.5 Oil Production Plant,Mangya Qinghai 816499,China;Southwest Branch of PetroChina Engineering Construction Co.,Ltd.,Chengdu Sichuan 610041,China;PetroChina Qinghai Oilfield Exploration and Development Research Institute,Dunhuang Gansu 736202,China;Yumen Oilfield Branch Huanqing Oil Production Plant Of PetroChina,Qingyang Gansu 745000,China;Qinghai Oilfield Testing Company Of PetroChina,Mangya Qinghai 816400,China)

机构地区：[1]中国石油青海油田采油五厂,青海茫崖816499 [2]中国石油工程建设有限公司西南分公司,四川成都610041 [3]中国石油青海油田勘探开发研究院,甘肃敦煌736202 [4]中国石油玉门油田分公司环庆采油厂,甘肃庆阳745000 [5]中国石油青海油田测试公司,青海茫崖816400

出　　处：《当代化工》2024年第8期1833-1837,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金青年科学基金项目(项目编号:52304036)。

摘　　要：低渗透油田开发面临传统采油技术效率低、环境污染等挑战,生物酶化学驱油技术因其环保高效而备受关注,但其在低渗透油田中的适用性和稳定性尚需进一步研究。针对这些问题展开系统性的实验研究,首先通过对不同种类生物酶的优选,发现脂肪酶在不同质量浓度下表现出最显著的驱油效果,最佳质量浓度为2.0 g·L^(-1),可提高原油采收率至24.5%。其次,评价脂肪酶在高盐度和碱性条件下的稳定性,发现在适当质量浓度下脂肪酶仍能保持较高的驱油效果,但在极端条件下其活性可能会受到抑制。最后,研究发现脂肪酶能够有效降低原油表面张力,当质量浓度为2.0 g·L^(-1)时,原油表面张力可降至37.9 m N·m^(-1)。The development of low-permeability oil fields faces challenges such as low efficiency of traditional oil production technology and environmental pollution.Bioenzyme chemical oil flooding technology has attracted much attention because of its environmental protection and high efficiency.However,its applicability and stability in low-permeability oil fields require further research.In this paper,a systematic experimental study on these issues was carried out.First,through the optimization of different types of biological enzymes,it was found that lipase exhibited the most significant oil displacement effect at different mass concentrations.The optimal mass concentration was 2.0 g·L^(-1),which could increase the oil recovery rate to 24.5%.Secondly,the stability of lipase under high salinity and alkaline conditions was evaluated,and it was found that lipase could still maintain high oil displacement effect under appropriate mass concentrations,but its activity was inhibited under extreme conditions.Finally,it was found that lipase could effectively reduce the surface tension of crude oil.When the mass concentration was 2.0 g·L^(-1),the surface tension of crude oil was reduced to 37.9 mN·m^(-1).

关 键 词：低渗透油田 酶 稳定性 表面 驱油效果 

分 类 号：TQ424.27[化学工程] TE357.4[石油与天然气工程—油气田开发工程]