盐井大井斜开窗侧钻水平井绕腔连通技术

发布时间：2018-02-15 13:11

本文关键词： 盐井侧钻水平井斜向器轨道设计三维绕障溶腔连通　出处：《石油钻采工艺》2017年04期 　论文类型：期刊论文

【摘要】：盐井水溶开采形成溶腔后,溶腔中的岩盐层,因作用于岩盐层上的支承压力超过其所处应力状态的强度极限而发生塑性破坏,随着开采的继续,破坏形式不变,破坏范围增大。原苏16井组钻井轨迹下穿泥岩造成溶腔通道堵塞,采卤量只有6~7 m~3/h,基本处于半停产状态,严重影响了卤水的产量,采用多种工艺均未能解堵。通过引进大斜度开窗工艺、短半径水平井技术,对侧苏盐16-1井进行三维绕障设计,轨道优化,并优化开窗侧钻技术方案,实现侧苏盐16-1井轨迹绕过小腔与苏盐16井大溶腔连通的目。该井在大斜度开窗工艺、高造斜率轨迹控制以及绕腔连通技术方面取得成功,形成大斜度开窗绕腔连通技术,为今后盐井水平连通井开窗侧钻的常态化提供借鉴。
[Abstract]:After the formation of solution cavity in salt well, the rock salt layer in the solution cavity has plastic failure because the supporting pressure acting on the salt layer exceeds the strength limit of the stress state in which it is located. As the exploitation continues, the failure form remains unchanged. The damage scope is enlarged. The mudstone penetration under the drilling trajectory of the original Su-16 well group results in the blockage of the channel of the solution cavity, and the production of halogen is only 67 mm2 / 3 / h, which is basically in the state of semi-shutdown, which seriously affects the production of brine. By introducing the large slope window opening process and the short radius horizontal well technology, the 3D barrier design, track optimization and sidetracking technology scheme of sidewall Suyan 16-1 well are carried out. The well trajectory of side suyan 16-1 is connected with the large solution cavity by bypassing the small cavity. The well has been successful in the technology of high slope window opening, the control of high slope trajectory and the technology of connecting around the cavity. It provides reference for normalizing the sidetracking of horizontal connected wells in salt wells in the future.
【作者单位】：中国石化华东石油工程公司江苏钻井公司;中国石化华东石油工程公司工程技术公司;
【分类号】：TE243

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