渤海油田稠油水平井防砂筛管耐温能力的确定  

Determination of the Temperature Resistance Capacity of Sand Control Screen Liner in Horizontal Heavy Oil Wells in the Bohai Oilfield

作　　者：于法浩 蒋召平 白健华 刘义刚 孟祥海 YU Fahao;JIANG Zhaoping;BAI Jianhua;LIU Yigang;MENG Xianghai(Tianjin Branch,CNOOC China Limited,Tianjin,300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《石油钻探技术》2018年第6期65-70,共6页Petroleum Drilling Techniques

基　　金：国家科技重大专项"渤海油田高效采油工程及配套技术示范"(编号:2016ZX05058-003)资助

摘　　要：渤海油田热采水平井防砂筛管选型时参考的耐温能力未考虑井况的影响,导致部分热采水平井选用的防砂筛管不能满足注热要求而发生破坏。为此,在分析稠油热采水平井防砂筛管注热时受力的基础上,综合考虑弯曲应力与热应力对防砂筛管破坏的影响,给出了稠油热采水平井防砂筛管耐温能力的数值模拟计算方法。利用该方法计算了渤海油田6口热采水平井防砂筛管的耐温能力,分析了单位狗腿严重度下星孔、金属网布和桥式复合3种防砂筛管的耐温能力降低幅度。研究发现:考虑弯曲应力计算出的耐温能力与现场实际较吻合;单位狗腿严重度下星孔、金属网布和桥式复合3种防砂筛管耐温能力降低6～16℃;单位狗腿严重度下防砂筛管耐温能力的降低幅度随防砂筛管径向尺寸增大而增大;防砂筛管基管钢级越高,耐温能力降低幅度越小,且钢级对耐温能力降低幅度的影响程度大于径向尺寸;TP110H和BG110H钢级的金属网布或桥式复合防砂筛管具有较高的耐温能力,能满足渤海油田热采水平井的注热要求。研究结果表明,稠油热采水平井选择防砂筛管时,应考虑弯曲应力对防砂筛管耐温能力的影响,否则会导致防砂失效,影响稠油热采开发效果。The current reference temperature resistance capacity for sand control screen liner selection of thermal recovery wells in Bohai Oilfield did not take account the influence of well conditions.Consequently,there was a breakdown of selected sand control screen liner in some thermal recovery wells because they failed to meet the requirements of heat injection.To solve the problem,researchers developed a numerical simulation method for calculating screen liner temperature resistance ability in thermal horizontal wells by means of the mechanical analysis of sand control screen liner in heat injecting conditions.Further,they considered the impact of bending and thermal stress on screen liner failure.Using this method,the temperature resistance capacity of sand control screen liner in six thermal recovery horizontal wells in Bohai Oilfield was calculated.Next,the reduction range of temperature resistance capacity of three types of sand control screen liner,i.e.star mesh,metal mesh and bridge-type composite under unit dog leg severity was analyzed.The results showed that the temperature resistance calculated under the bending stress was in good agreement with the actual situation.In fact,the temperature resistance of three types of sand control screen liner under unit dog leg severity was reduced by6-16℃.Further,the reduction range of temperature resistance of sand control screen liner under unit dog leg severity increased with sand control screen line size.The higher steel grade of sand control screen liner generated a more limited range of reduced temperature resistance,and the influence of the degree of steel grade was greater than that of screen liner size.The grade TP110H,BG110H metal mesh or bridge-type composite sand control screen liner had high temperature resistance and could meet the heat injection requirements of thermal recovery wells in Bohai Oilfield.Therefore,we could conclude that the effect of bending stress on the temperature resistance capacity of sand control screen liner should be taken into accou

关 键 词：稠油热采 水平井 防砂筛管 弯曲应力 热应力 数值模拟 渤海油田 

分 类 号：TE358[石油与天然气工程—油气田开发工程]