摘要
江37区块作为采油九厂第一个稠油开发试验区,已经进行了3年的蒸汽吞吐热采试验,目前油井已进入第四轮蒸汽吞吐开采阶段。随着热采试验的不断深入,试验区的含水上升快、井间干扰严重,油层平面和纵向动用不均、储量动用差等问题日益显现,严重影响了试验区的稠油开发。针对这些问题和矛盾,在研究稠油蒸汽吞吐开发模式和递减规律的基础上,提出了改善蒸汽吞吐阶段开发效果的有效方法和途径,为下步试验区的稠油热采试验提供一定的借鉴。通过现场试验证实,提高蒸汽干度、多井整体吞吐和水平井试验,是改善薄层稠油油藏蒸汽吞吐效果的有效途径,其中提高蒸汽干度可以降低单位注入热量的注水当量,减少近井地带的冷凝水饱和度;多井整体吞吐可以有效解决油井之间因注汽而相互干扰的问题;水平井由于其吸汽能力强,开发效果远好于普通直井。
As the first pilot area of heavy oil development study in No.9 oil production plant of Daqing Oilfield,Jiang 37 area has carried out three years′ steam stimulation test,and currently it has been into the fourth round of steam stimulation stage.With the deepening study of thermal recovery experiment,quickly increasing of water cut,severe multiwell interference,unequal production of oil reservoirs at plane and verticality and few produced reserves and other problems are increasing obviously that seriously affected the heavy oil development in the pilot area.To solve these problems,the effective ways to improve the steam stimulation effect are proposed based on the research of development mode and decline rule of the steam stimulation in heavy oil,which will provide a reference for the next step test of thermal recovery of heavy oil.The field test proves that improving the steam quality,multi-well sequential steam injection and horizontal well experiment are the effective ways for improving the effect in the heavy oil reservoirs with thin layers.Among them,steam quality increasing may reduce the water equivalent of the unit injected heat and reduce the condensate saturation of the near-wellbore area;multi-well sequential steam injection can solve the interference problems after steam injection among oil wells;because of its strong ability to absorb steam,the horizontal wells is better than normal vertical wells.
出处
《中外能源》
CAS
2011年第9期54-58,共5页
Sino-Global Energy
关键词
稠油
蒸汽干度
分层注汽
组合式吞吐
水平井
heavy oil
steam quality
steam injection in separated layers
combination huff and puff
horizontal well
