摘要
针对稠油疏松砂岩油藏采油工艺中防砂管极易发生堵塞的现状,对现存防砂管的滤材和结构进行了改进,并进行防砂管基本性能试验和压力极限的堵塞试验。结果表明:防砂管的渗透率受压差影响明显;含粘土等固体颗粒的原油在渗流过程中更容易使防砂管发生堵塞;在相同的渗流环境下,经滤材改进设计的新型防砂管渗透率最高,阻力系数最小,渗流量最大,并且渗透率随时间降幅最小,渗透性能最好;同时在极限压力下,经结构改进设计的新型防砂管渗流流量最大,能够长时间维持稳定渗流状态,试验结束后,绕丝完好,没有大量泥沙淤积吸附现象。
To resolve the problem of mechanical sand screen pipe that is easily blocked in unconsolidated sandstone heavy oil reservoir, the present sand screen pipe is improved in terms of filter material and structure,and the basic performance experiment and seepage experiment under pressure limit are developed.The results show that the differential pressure affects penetration rate obviously;the mixed fluid with clay and other solid particles in the flow are more easily to form the sand tube plug;in the same seepage environment,the new type of sand control has the highest penetration rate,the minimum resistance coefficient,the highest seepage flux,the lowest penetration rate decline over time and the best permeability;under the same situation of pressure limit and time,the new sand screen has the highest seepage flux,and is able to maintain a long steady-state flow condition.At the end of experiment,the winding wire is intact without abundant sediment adsorption.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第4期94-97,117-118,共4页
Petroleum Geology and Recovery Efficiency
基金
江苏省自然科学基金资助项目"弱吸附
抗泥质防砂器技术研发"(BK2007095)
关键词
渗流
机械式防砂管
渗透率
阻力系数
渗流量
seepage flow
sand screen pipe
permeability
resistance coefficient
seepage flux
