镶嵌剂与成膜剂协同增效保护储层钻井液室内研究

Laboratory Study on Drilling Fluid of Mosaic Agent-Membrane Agent Synergistic Interaction for Reservoir Protection

李海涛 赵修太 龙秋莲 任熵 吕开河

Li Haitao Zhao Xiutai Long Qiulian Ren Shang Lü Kaihe

中国石化胜利油田分公司地质科学研究院,山东东营 257015; 中国石油大学(华东)石油工程学院,山东青岛 266580; 中国石化石油勘探开发研究院,北京 100083

Geoscience Research Institute of Shengli Oilfield Company,Sinopec,Dongying,Shandong,257015,China; School of Petroleum Engineering,China University of Petroleum(Huadong),Qingdao,Shandong,266580,China; Petroleum Exploration and Development Research Institute,Sinopec,Beijing,100083,China

在钻井过程中,为了减少钻井液对油气储层的损害,通常采用储层暂堵技术,而该技术的关键是要求暂堵粒子尺寸与地层孔喉合理匹配,这种匹配关系很难把握,从而影响保护油气层效果。针对传统暂堵技术在应用中的不足,提出了镶嵌剂与成膜剂协同增效保护储层技术。采用钻井液传统评价与砂心试片评价相结合的方法,筛选出了保护油气层的镶嵌剂XQ-3和成膜剂DL-7,室内试验结果表明,将两者复配后加入钻井液中,岩心渗透率暂堵率达到99.6%,岩心切片渗透率恢复率达到99.4%,与传统的暂堵剂相比分别提高了20.6%和15.3%,表现出良好的协同增效暂堵效果及对不同孔喉更好的适应性能。因此,XQ-3和DL-7是保护油气储层的理想钻井液添加剂。

In order to reduce the damage by drilling fluid to oil and gas formation during drilling,the temporary plugging technology for reservoir is usually selected and the key is that temporary plugging particle size reasonably matches the pore throat.The matching is difficult to grasp,thus affecting the reservoir protection.According to the drawback of traditional temporary plugging technology in application,the technology of mosaic agent-membrane agent synergistic interaction for reservoir protection was proposed.Mosaic agent XQ-3 and membrane agent DL-7 for reservoir protection were developed and selected based on the combination of traditional evaluation of drilling fluid and evaluation of sand core test piece.If both were compounded,the temporary blocking rate was 99.6% and the slicing core permeability recovery was 99.4%.Comparing with the traditional blocking technique,they were increased by 20.6% and 15.3% respectively,showing good synergistic interaction temporary blocking effect and stronger adaptability to different pores,which can be used as a new drilling fluid system for formation protection.

国家科技重大专项"大型油气田及煤层气开发"课题5"中西部地区碎屑岩领域勘探关键技术"(编号:2008ZX05002-005)部分研究成果。

https://doi.org/10.3969/j.issn.1001-0890.2012.04.013