新型FM超级凝胶复合堵漏技术  

A Novel Compound Lost Circulation Material FM Super Gel

作　　者：王先洲 夏景刚 左洪国 史东波[2] 周志强 窦建宇 

机构地区：[1]渤海钻探第五钻井工程分公司 [2]华北油田第一采油厂

出　　处：《钻井液与完井液》2015年第6期50-53,106-107,共4页Drilling Fluid & Completion Fluid

摘　　要：为提高复杂漏失地层的堵漏成功率,研究了抗温达140℃的新型FM超级凝胶的堵漏性能和堵漏机理。FM超级凝胶以吸水膨胀性聚合物为主体,复合刚性骨架材料,利用其吸水变形特性和自膨胀物理堵塞作用,提供较高的膨胀堵塞强度。使用0.3~2.0 mm的石英砂、4.3~7.8 mm的钢珠及1.0~5.0 mm的缝隙板模拟高渗透、大孔道和裂缝性漏失地层,测得总漏失量分别为86~113、204~381和22~64 m L,均堵住,承压达7.0 MPa。与刚性颗粒、弹性颗粒材料、纤维材料、可变形充填材料复配使用后,在钢珠床及缝隙板的总漏失量分别降为63~95和15~43 m L,承压提高到9.0 MPa,进一步提高了FM超级凝胶的承压能力和适应性。该技术在南堡13-1170和大吉4-9向4井堵漏中进行了应用,堵漏均一次成功,满足了后续施工的要求。表明FM超级凝胶能够适应不同孔隙、裂缝性漏失地层的堵漏。A new FM super gel was studied for its performance and mechanism as a lost circulation material.As an LCM made from polymers that swell when water is absorbed in,and some rigid matrix materials,FM super gel retains its function at temperatures up to 140℃.The FM super gel can swell when mixed with water,thus seals channels through which mud is lost.In the studies,quartz sands(particle sizes 0.3-2.0 mm),steel balls(diameters 4.3-7.8 mm) and slat(with slits of 1.0-5.0 mm) were used to simulate fractured formations with high permeability and large pore throats.The FM super gel stopped mud losses on the three simulators when total mud losses were 86-113 mL,204-382 mL and 22-64 mL,respectively,and the maximum pressure exerted on the FM super gel was7.0 MPa.When rigid particles,elastic particles,fibers and deformable fills were added to the FM super gel,the total volumes of mud losses through the steel balls and the slat were reduced to 63-95 mL and 15-43 mL,respectively,and the maximum pressure exerted on the FM super gel was increased to 9.0 MPa,indicating that the pressure containment was enhanced.The FM super gel was used in the well Nanpu-13-1170 and the well Daji-4-9-Xiang-4,and had gained great success in mud loss control,with no reoccurrence of mud losses.

关 键 词：堵漏 超级凝胶 膨胀性堵漏剂 复合 承压能力 裂缝性地层 

分 类 号：TE282[石油与天然气工程—油气井工程]