致密油藏碳化水驱提高采收率方法

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DOI: 10������ 19597 / J������ ISSN������ 1000⁃3754������ 201807019
致密油藏碳化水驱提高采收率方法
于海洋1 杨中林1 刘俊辉1 陈哲伟1 程时清1 雷启鸿2 屈雪峰2
(1������ 中国石油大学 ( 北京) 油气资源与探测国家重点实验室, 北京 102249; 2������ 中国石油长庆油田分公司勘探开发研究院, 陕西 西安 710018)
2019 年 4 月
大庆石油地质与开发
Apr������ , 2019
第 38 卷第 2 期
Petroleum Geology and Oilfield Development in Daqing
Vol������ 38 NoBiblioteka Baidu����� 2
China; 2������ Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi’ an 710018, China)
Abstract: At present, there is no report about carbonated water injection ( CWI) in China, and there exist the studies of the CWI abroad only focusing on the middle-high and low permeability oil reservoirs. In the light of tight oil reservoirs, the feasibility of the CWI for enhancing the oil recoveries by CWI and CWI+surfactant ( CWI adding surfactant, ACWI) flooding was researched for the first time. Based on the reservoir condition of Block M in Chan⁃ gqing Oilfield, the following indoor experiments were conducted: CWI, water alternating CO2 injection, surfactant flooding and ACWI flooding to make sure of the oil incremental potentials of the CWI and moreover to ensure the feasibility of CWI'EOR in the tight oil reservoir. The experimental results demonstrate that CWI recovery is 7% more than that of the water flooding, and 3% more than the degree of the CO2 / water alternating injection; ACWI a⁃ chieves the best performance with 10% oil recovery than that of the water flooding. In the light of the surfactant, CWI and ACWI floodings, their numerical simulations were studied, and furthermore the contrast was engaged with the results of the indoor experiments, the results show that the conventional compositional model generally overesti⁃
中图分类号: TE357 文献标识码: A 文章编号: 1000⁃3754 (2019) 02⁃0166⁃09
EOR method by the carbonated water injection ( CWI) for tight oil reservoirs
YU Haiyang1, YANG Zhonglin1, LIU Junhui1, CHEN Zhewei1, CHENG Shiqing1, LEI Qihong2, QU Xuefeng2 (1������ State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249,
摘要: 目前, 国内尚无碳化水驱研究报道, 国际上碳化水驱研究仅针对中高渗、 低渗油藏。 为此针对致密油藏, 首次研究 碳化水和碳化水+表面活性剂驱提高采收率的可行性。 基于长庆油田 M 区致密储层, 开展了碳化水驱、 CO2 水气交替注入、 表面活性剂驱、 碳化水+表面活性剂驱室内实验, 明确碳化水驱的增油潜力, 证明碳化水驱提高致密油藏采收率的可行性。 实验结果表明, 碳化水驱比水驱增加 7%的采收率, 比 CO2 水气交替注入增加 3% 的采收率; 碳化水+表面活性剂驱开发效 果最好, 比水驱增加 10%的采收率。 针对表面活性剂驱、 碳化水驱、 碳化水+表面活性剂驱进行数值模拟研究, 并与室内 实验结果进行对比, 结果表明, 常规组分模型普遍高估碳化水驱开发效果, 通过引入亨利定律和表面活性剂驱模型, 能够 较为准确地预测碳化水驱的开发效果, 与实验结果相比误差低于 1������ 2%。 关 键 词: 碳化水驱; 致密油藏; 表面活性剂; 岩心驱替实验; 数值模拟
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