摘要
随着油田的开发,地层受到破坏,油井产液量逐渐下降,水井注水困难,其中原因之一是近井地带的堵塞。由于堵塞介质的复杂性,只靠单一的解堵措施很难达到预期的效果,并且有效期短,为此提出了水气脉冲波复合化学解堵技术这一新的解堵方式。通过查阅文献和室内实验,筛选出适合不同堵塞类型油水井解堵的化学解堵剂及其配方,实验室研制了热化学解堵剂配方,并解释了化学解堵剂与堵塞介质的作用机理。通过对孤岛油田现场试验将化学解堵剂与水气脉冲波相结合,施工前后油井的单井产液量最高增加近7倍,产油量最高增加6倍多,累积增油量最高达330t,有效期均在10d以上,最高达89d。
With the oilfield development,the formation is damaged,the liquid producing capacity of oil wells is decreasing gradually, and water injection is becoming difficult. The blockage of immediate vicinity of wellbore is one of the causes. Because the plugging material is various, it is difficult to achieve the expecting effect with single treatment and the term of validity is short. So a new blockage removal way is developed that is called compound chemistry blockage removal with water-gas pulsating wave. Based on literatures and laboratory experiments, the chemical a-gents and appropriate formula are selected for different types of blockage material. The formula of thermal chemical blockage removal agent is studied in laboratory. Reaction mechanism of the chemical blockage removal agent and the plugging medium is interpreted. In 2005, the chemical blockage removal agent combined with the water-gas pulsating wave are applied in Gudao Oilfield. The maximum daily liquid producing capacity of single well increased by nearly 7 times after operations. The maximum daily oil producing capacity increased by more than 6 times. The maximum cumulative incremental oil production is up to 330t. The term of validity is more than 10d for all wells with 89d of the maximum value.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2007年第5期101-103,共3页
Petroleum Geology and Recovery Efficiency
关键词
堵塞
水气脉冲波
解堵
复合
blockage, water-gas pulsating wave, blockage removal , compound
