MS型堵漏隔离液的研究与应用

Research and Application of MS Spacer Fluid for Plugging

为了解决易漏失井固井施工中水泥浆的漏失问题,研究开发了一种堵漏隔离液。首先运用颗粒级配理论确定堵漏材料的粒径范围,然后根据堵漏材料物理性能的要求,优选了蛭石颗粒和丙纶纤维作为堵漏材料。使用MS隔离液化学剂、高温隔离液助剂和堵漏材料配制得到MS型堵漏隔离液,对MS型堵漏隔离液的流变性、稳定性、纤维分布情况、相容性和冲洗能力等进行了评价,利用缝隙板堵漏试验和砂床堵漏试验对MS型堵漏隔离液的堵漏性能进行评价。结果表明,MS型堵漏隔离液各项性能指标完全满足固井施工要求,堵漏承压能力达到8MPa。MS型堵漏隔离液在河坝107井219.1mm尾管固井中成功应用,并在川东北地区和塔河油田进行了53井次的现场应用,取得了良好的堵漏效果。

In order to solve the leakage problem in cementing operation, a new plugging spacer fluid has been developed. The particle size and range of plugging material were determined according to the theory of grain composition, and Vermiculite particles and Polypropylene fiber selected as plugging materials. Taking MS spacer as a base fluid,made by MS chemicals and high temperature additive,the rheological property, stability,distribution of fiber, compatibility and flushing ability were evaluated. Plugging ability of the spacer was also evaluated with crack-plate plugging and sand bed plugging experiment. The results show that the performance of the MS plugging spacer fluid meets all the requirements for cementing, and its plugging pressure-bearing ability reaches 8 MPa. The MS plugging spacer fluid was applied successfully during 4219.1 mm liner cementation in Well Hebal07. Field applications of 53 wells in northeastern Si- chuan area and Tahe Oilfield have got good plugging results.