远程遥控投球装置在层间暂堵多缝压裂技术中的应用

Application of remote control casting device in interlayer temporary plugging multi-crack fracturing technique

陈文斌 陆红军 闫军 李建山 李照林 邓小红

CHEN Wenbin LU Hongjun YAN Jun LI Jianshan LI Zhaolin DENG Xiaohong

中国石油长庆油田分公司超低渗透油藏研究中心，陕西西安　710018 兰州城临石油钻采设备有限公司，甘肃兰州　7300703.中国石油华北油田第一采油厂，河北任丘　062552

Ultra-low Permeability Reservoir Research Center of Changqing Oilfield Branch, CNPC, Xi’an 710018, China Lanzhou Chenglin Oil Drilling Equipment Co. Ltd., Lanzhou 730070, China

堵塞球的连续、有效、多次投入是影响暂堵多缝压裂工艺效果的主要影响因素。针对现有堵塞球投加装置在层间暂堵多缝压裂工艺应用中存在装球数量少、性能不稳定、智能化程度较低等缺点，研发了新型远程遥控自动投球装置。装置由本体和远程控制柜两部分组成，本体设计采用螺旋轴—导向套式装球结构，能够大幅度提高装球数量，且承压强度为105 MPa，输出扭矩高达560 N·m，安全运行可靠程度高；远程控制柜采用内部微电脑控制，能够实现远程遥控投球和自动计算已投球数。根据层间暂堵多缝压裂工艺的选井选层条件，在吴起长6、华庆长6等区块应用了该装置，试验井平均暂堵级数在3级以上，措施后初期日增油在2 t以上，措施有效期大于180 d，且装置现场运行安全、平稳、可靠，具备进一步推广应用的潜力。

The temporary plugging multi-crack fracturing process is mainly affected by the continuous, effective and multiple casting of plugging balls. This new remote control automatic casting device is aimed at solving the shortcomings and deficiencies of the application of casting device for plugging ball in interlayer temporary plugging multi-seam fracturing process such as small quantity of loading balls, unstable performance and low intelligent degree. This device is composed of a body and a remote control cabinet. The body is of screw axis - guide sleeve type loading structure, which improves the loading quantity effectively with the bearing strength of 105 MPa, the output torque of 560 N?m and high safe operation reliability. The remote control cabinet is controlled by internal microcomputer, which can complete the remote control casting and count the casted quantity automatically. This device is applied to such areas as Wuqi Chang-6 and Huaqing Chang-6 according to the conditions of interlayer temporary plugging multi-seam fracturing process for selecting wells and layers. The average stages number of test wells is at Stage 3 above. The daily increasing oil is over 2t in the preliminary stage after the measure is taken. The validity of the measure is more than 180 days. This device runs safely, stably and reliably in the field and has the potential of further popularization and application.