摘要
为探索气顶油藏的有效开发方法,喇嘛甸油田2006年开展了南块萨Ⅱ2＋3气顶注聚障开发缓冲区试验,通过注聚合物在油气区之间形成聚障条带,将油气区隔开并保持相对稳定,气区暂不开采,缓冲区直接进行高浓度聚驱开发.截至2013年底,缓冲区累计注入孔隙体积0.88倍,阶段提高采收率23.9％,采出程度60.5％,最终采收率可达到65％以上.试验形成了3项关键技术,即隔障建立、维护与监测技术,三区压力系统调控技术,低含水油层高浓度聚驱开发调整技术,为喇嘛甸油田气顶及缓冲区的全面开发做好了技术储备.
In order to explore the effective developing method of the gas cap reservoir in Lamadian Oilfield, the de- veloping test in the polymer-injected buffer area was conducted for Gas Cap S lI 2＋3 in South Block of the oil field in 2006. The buffer belts were formed by the polymer injection among the oil and gas blocks, thus the petroleum was separated and maintained relatively stable, the gas block was not produced temporarily, while the buffer area was developed directly by high-concentration polymer. By the end of 2013, the cumulative injection pore volume in the buffer area reached 0. 88 PV, the stage enhanced recovery factor was up to 23.9%, the recovery degree was 60. 5% and the ultimate recovery rate reached more than 65%. At the same time, three sets of key technologies were developed： the barrier establishment, maintenance and monitoring; adjusting-controlling technique of the three-block pressure systems, high-concentration polymer flooding development and adjustment for the low-watercut oil reservoirs, thus the technical reserves for the overall development of Lamadian Gas Cap and buffer area has well prepared.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2014年第4期121-125,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
喇嘛甸油田
气顶
聚合物
隔障
缓冲区
压力调控
Lamadian Oilfield
gas cap
polymer
barrier
buffer area
pressure adjustment and control
