机械防砂筛管挡砂介质堵塞机制及堵塞规律试验  

Blocking mechanism and blocking laws experiments of sand retention media in mechanical screens

作　　者：董长银[1] 贾碧霞[2] 刘春苗[1] 吴建平 王登庆 孙德旭 韩晓龙[4] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266555 [2]青海油田钻采工艺研究院,甘肃敦煌736200 [3]胜利油田采油工艺研究院,山东东营257003 [4]青海油田天然气开发公司,青海格尔木816000

出　　处：《中国石油大学学报（自然科学版）》2011年第5期82-88,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(50704035);国家'863'计划项目(2006AA09Z351)

摘　　要：针对防砂井由于机械筛管及砾石层等挡砂介质被堵塞而造成低产或停产的情况,开展防砂井挡砂介质堵塞机制研究,提出非充填带的桥架充填堵塞机制和挡砂介质内部桥架堵塞机制。利用机械筛管微观驱替堵塞模拟试验装置对机械筛管多层滤网挡砂层的堵塞过程、堵塞机制及影响规律进行系统的试验模拟,研究影响挡砂筛网堵塞程度的主要因素及其影响规律。结果表明:生产时间、出砂速度、粉细砂含量、泥质含量、原油黏度等是影响挡砂介质堵塞过程及堵塞程度的主要因素;试验结果揭示了挡砂介质堵塞程度与影响因素之间的定性和定量规律;试验数据可以通过拟合用于建立挡砂介质堵塞渗透率比与上述参数之间的定量经验关系模型,进一步预测特定地质与生产条件下防砂井挡砂介质堵塞程度随生产时间的变化规律。The productivity of sand control wells tends to decrease considerably due to the gradual blocking of sand retention media in screen or gravel-pack by formation fines and others. Aimed at the above problem, the blocking mechanism of screen porous media was studied, which concerns non-packed cavity outside screen bridge packing mechanism and the mechanism of inner bridge blocking of screen media. The blocking process, blocking mechanism and affecting regularity of multi-layer sand retention media were simulated by a visual blocking simulation experimental apparatus. The experimental results indicate that the production time, sand production rate, fines content in formation sand, clay content, oil viscosity are the main factors to affect the blocking process. The qualitative and quantitative relationships between the above factors and the final blocking damage degree are presented by using the experimental data, which can be used to fit the empirical formula describing the above relationships. It＇s very helpful to predict the variation of sand retention media blocking degree with the production time under given reservoir and production conditions.

关 键 词：防砂 机械筛管 挡砂介质 堵塞机制 堵塞规律 试验研究 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程]