大庆长垣外围低渗透油田开发机理  

DEVELOPMENT MECHANISM OF DAQING PERIPHERAL LOW-PERMEABILITY RESERVOIR

作　　者：赵国忠[1] 杨清彦[1] 唐文锋[1] 曹维政[1] 郑宪宝[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2009年第5期126-133,共8页Petroleum Geology & Oilfield Development in Daqing

摘　　要：从大庆长垣外围低渗透油田孔隙结构和渗流特征分析出发，综合运用理论、实验和计算方法研究了特低渗储层非达西渗流机理、压敏性及对开发效果的影响、CO2驱有效动用机理以及空气驱开发的可行性等问题。在这些研究的基础上，形成了低渗透储层开发机理和规律的认识，给出了有效开发动用这类储层的思路和建议：注水开发实践表明，这类储层难以建立有效的驱动体系，一般要实施人工压裂、缩小井距才能达到工业产量和注水量，并提高采收率；南于压力敏感性和非达西渗流规律的存在，注水开发能量损失大，要求必须保持一定的压力水平开采；另外，注气开发比注水易于建立有效驱动体系，驱油机理表明还可能带来额外采收率，是具有一定前景的开发技术。According to the pore structures and flowing characteristics of Daqing Peripheral low-permeability reservoirs, non-Darcy flow mechanism and pressure-sensitivity of ultra-low-permeability reservoir and their influences on the development effect, effective producing mechanism of CO2 drive and feasibility of air drive have been studied in combination of theory, experiment and calculation method. On the basis of research results, the knowledge of development mechanism and development rule is developed; the ideas and suggestions are also proposed. Water flooding development practice shows it is difficult to build an effective drive system for low-permeability reservoirs, and only by hydraulic fracturing and reducing well space can obtain industrial production and water injection rate so as to increase oil recovery ; Besides, a certain recovery pressure should be maintained due to great loss of development energy of water flooding caused by pressure-sensitivity and flowing rule. Compared with water flooding, it is much easier for gas drive to form an effective drive system and obtain additional recovery with a certain development prospect.

关 键 词：低渗透 孔隙结构 渗流特征 非达西 压敏性 CO2驱 空气驱 

分 类 号：TE348[石油与天然气工程—油气田开发工程]