三次采油区块套损井修复技术研究与应用  

Research and Application on the Casing Damage Repairing Technology of the Block in Tertiary Oil Recovery

作　　者：张利巍[1,2] 范立华 常玉连 

机构地区：[1]东北石油大学,大庆163318 [2]黑龙江省高校校企共建测试计量技术及仪器仪表工程研发中心,大庆163318 [3]大庆油田井下作业分公司,大庆163453

出　　处：《科学技术与工程》2014年第23期46-50,共5页Science Technology and Engineering

摘　　要：目前,三次采油主要以聚合物驱、三元复合驱为主,由于注入介质自身的特性,造成此类区块套损类型复杂,修复难度大。主要存在以下问题:一是区块套损机理认识不清,工艺措施针对性不强;二是胶结物携带砂、泥岩块堵塞井筒,循环泄压困难;三是吐砂井上顶管柱,冲砂进尺不理想;四是小直径、活性错断、大段弯曲井打通道时效低、成功率低。这些套损井若不能得到及时有效治理,将严重影响区块的整体开发部署和产能的提高。通过从工程、地质方面分析套损原因,开展三次采油区块套损井修复技术研究,形成了以套损形态预测、加压起下及找打通道技术为主的技术系列,现场试验起到较好效果。At present, the tertiary oil recovery （TOR） is mainly carried alkali-surfactant-polymer （ASP） flooding technique, and the casing damage out by polymer flooding technique and of such techniques is complex which is difficult for the restoration of the wells in the block. There are mainly four problems existing in such kind of techniques ： firstly, the casing damage mechanism of the block is not well understood ; secondly, the decompression cycle is hard because of the holes are blocked by the cement with sand and mud stone ; thirdly, the sand washing footage is not well performed due to the upward movement of the sandy well; fourthly, to drill a passage in a small diameter, active fault break and long crooked well is time consuming, and success rate is low. If these casing wells cannot be governed efficiently in time, the integrated damage development deploys and enharlced production will be seriously impacted in the block. The casing damage mechanism is investigated and the restoration technique in the block of TOR by taking into account the engineering and the geology conditions, and a series of technologies including shape prediction of the casing damage, tripping under pressure and looking for and opening up a passage is formed, and the field test results are in good consistence with the theory.

关 键 词：三次采油 套损机理 修井 加压起下 找打通道 

分 类 号：TE358[石油与天然气工程—油气田开发工程]