PDF(Pubmed)
Abstract：
In this study, the reservoir drill-in fluid (RDF) was modified and optimized to improve the rheological properties and reduce the filtration properties of the drilling fluid used for drilling the oil-bearing zone horizontally. In polymer science, degradation generally refers to a complex process, by which a polymeric material exposed to the environment and workload loses its original properties. Degradation is usually an unwanted process. In certain cases, however, controlled polymer degradation is useful. For instance, it can improve the processability of the polymer or can be used in recycling or natural decomposition of waste polymer. Thus, the drilling fluid and parameter data of 30 horizontal wells that were drilled in the south of Iraq were collected using several reservoir drill-in fluids (RDFs), including FLOPRO, salt polymer mud (SPM), non-damaged fluid (NDF), and FLOPRO_PTS-200 (including the polymer thermal stabilizer). The obtained results showed that the polymer temperature stabilizer (PTS-200) enabled reducing the filtration rate by 44.33% and improved the rheological properties by 19.31% as compared with FLOPRO. Additionally, the average cost of NDF and SPM drilling fluids for drilling the horizontal section of the selected wells is around USD 96,000 and USD 91,000, respectively. However, FLOPRO-based drilling fluid showed less cost for drilling the horizontal section, which is USD 45,000.
摘要：
在这项研究中,对储层钻井液（RDF）进行了改进和优化，以改善流变性并降低用于水平钻井含油层的钻井液的过滤性能。在聚合物科学中，降解通常是指一个复杂的过程，暴露于环境和工作负荷的聚合物材料失去其原始属性。降解通常是一个不需要的过程。在某些情况下,然而,受控的聚合物降解是有用的。例如,它可以改善聚合物的加工性能或可用于废聚合物的回收或自然分解。因此，使用几种储层钻进流体（RDF）收集了在伊拉克南部钻探的30口水平井的钻井液和参数数据，包括FLOPRO,盐聚合物泥浆（SPM），无损伤液体(NDF),和FLOPRO_PTS-200(包括聚合物热稳定剂)。获得的结果表明，与FLOPRO相比，聚合物温度稳定剂（PTS-200）使过滤速率降低了44.33％，流变性能提高了19.31％。此外,NDF和SPM钻井液的平均成本分别约为96,000美元和91,000美元。然而,FLOPRO基钻井液水平段钻井成本较低,也就是45,000美元。
