摘要
扶余油田扶北地区油品性质属于弱稠油,长期采用注水开发方式,效果差,资源没有得到充分动用。2007年,用热采方式成功动用探40区块的稠油资源,从第一阶段的蒸汽吞吐看,热采投产井的日产油量是常规投产井的2～3倍,效果较好。经过2～3个吞吐周期后,进入到蒸汽驱阶段试验,前期应用数值模拟技术,确定符合油藏特点的汽驱参数和注入方式:注汽压力8～11MPa,原则上注汽压力要求小于油层破裂压力;注汽速度50t/d;井底注汽干度大于40%;油藏压力1～3MPa。试验效果认识到,好的储层物性、合理的注汽参数、高的采注比和不发生汽窜,是取得蒸汽驱开发效果的关键因素。建议选择储层条件好,特别是油层的物性参数要好的区块,进一步扩大蒸汽驱试验范围,为扶余油田大规模蒸汽驱开发提供技术储备。并且,要具备完善的试验监测和评价手段。
The oil in Fubei area of Fuyu oilfield belongs to weak-viscous crude.The effect of water flooding for long time is poor and the resource has not been produced sufficiently.The resource of heavy oil in No.40 prospect was produced by thermal recovery successfully in 2007.The effect was good at the first stage of huff and puff with 2-3 times of daily oil production in the brought-in wells by the thermal recovery than that in normal brought-in wells.After two to three cycles of huff and puff,step by step test of steam drive entered.At early stage,numerical simulation was applied for determining steam drive parameter and injection way according to the reservoir features.Steam injection pressure was 8-11MPa,which should be less than breakdown pressure of oil layers in principle.Steam injection velocity was 50t/d,and dryness fraction of steam injection at bottom hole should more than 40%.Oil reservoir pressure was 1-3MPa.Experiment results show that the key factors of good results by steam flooding are good reservoir physical property,rational steam injection parameter,high production-injection ratio and no steam channeling.The reservoirs with good conditions,especially good physical parameter of oil layers,should be selected for further steam drive experiments,which will provide technology supply for large-scale steam flooding in Fuyu oilfield.Perfect approach for test monitoring and evaluating should be adopted.
出处
《中外能源》
CAS
2011年第5期68-70,共3页
Sino-Global Energy
关键词
扶余油田
稠油
难采储量
蒸汽驱
开发方式
Fuyu oilfield
heavy oil
difficult-to-recovery reserves
steam drive
development mode
