摘要
百色盆地子寅油田仑16块砂岩油藏已进入特高含水开发后期,水驱剩余可采储量少,注水开发效果差。为提高区块采收率和开发效果,借鉴百色油田灰岩裂缝性油藏空气泡沫驱的成功经验,开展了泡沫辅助混气水驱先导性试验。试验结果表明,在地层温度49·5℃的低温轻质油藏中,注入的空气与地层残余油可以发生低温氧化(LTO)反应,产出气中氧含量低于2·6%,未出现气窜现象;对应油井产油上升、含水下降,预计最终采收率将提高10%左右,投入产出比大于1∶3·2。该试验的成功对砂岩油藏注水开发后期提高采收率具有重要的指导意义。
Sandstone reservoirs in Block Lun 16 of Ziyin Oilfield in Baise Basin are produced at the late stage of high water content, where remaining recoverable reserves are less with poor production effect for waterflooding. To improve the recovery efficiency and result of production, based on the experience of successful foam displacement in the limestone fracture reservoirs in Baise Oilfield, a pilot test is conducted with foam assisted miscible gas displacement. The result shows that for low temperature and light oil reservoirs of 49.5℃, low temperature oxidation (LTO) reaction is induced by injected air and residual oil in formation, oxygen content of the produced gas is less than 2.6 without gas channeling. For the corresponding oil wells with oil increase, water content decrease, it is predicted that the ultimate recovery efficiency increase is about 10, input-output ratio is more than 1∶3.2. the successful pilot test has a great significance for enhancing recovery efficiency at the late stage of water flooding in sandstone reservoirs.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2006年第5期132-135,共4页
Journal of Oil and Gas Technology
关键词
泡沫
混气水驱
空气
低温氧化
提高采收率
先导性试验
foam
miscible water flooding
air
low temperature oxidation
enhanced oil recovery
pilot test
