海南—月东油田浅海钻井液体系研究及应用

发布时间：2018-02-02 19:50

  本文关键词： 钻井液 聚合醇 氯化钾 储层保护　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着对海洋开发进程的加快,海洋油气业异军突起,年平均增长率达到了32.3%,迅速成长为中国海洋经济的支柱产业。另外,陆上油田陆续进入高含水、特高含水、产量递减阶段,中国东部油田普遍将目光投向水深不足10米的滩浅海地区。专家认为,这一领域已成为中国石油勘探开发的重要阵地。在人类对石油等不可再生资源的需求越来越大的情况下,海洋石油开采也成为人类对石油需求的希望所在。海南-月东油田属滩浅海地区,本文针对月东油田复杂的地质特点开展相关室内研究。研制的KCl-Sepolycol钻井液体系,70℃失水可控制在7mL以下,抑制性评价页岩回收率高达97.3%,地层侵入深度为3.1cm,渗透率恢复值为93%,明显优于其他钻井液体系,适合应用于浅海地区的环保型钻井液体系;研制的Non-Solids SPK钻井液体系,解决了无固相钻井液失水量大的缺点,70℃失水控制在8.4mL,引进0.1%的杀菌剂对钻井液体系性能影响较小,且同时能提高钻井液的抗腐蚀能力;两种体系均可抗10%抗岩屑污染和1.5%的水泥污染率;确定了RP储层保护液中破胶剂5%的最佳加量,破胶率达57%以上,研制的RP储层保护液在井下条件(温度为63-64℃)下7天的各项性能指标基本保持不变,稳定性较好;浸泡15天后的泥页岩未发生水化现象,抑制性完全满足施工要求。现场施工工艺结合室内研究成果,成功解决了月东油田携岩和润滑防卡问题、泥岩段井径扩大问题、密度控制问题、储层保护要求高等施工难点,形成了一整套适合海南-月东油田复杂地质条件的钻、完井液体系,现场应用取得了良好的效果,并取得了可观的经济效益。
[Abstract]:With the acceleration of marine development, the offshore oil and gas industry has suddenly emerged, the annual average growth rate has reached 32.3 percent, which has rapidly grown into the pillar industry of China's marine economy. In addition, onshore oil fields have entered into high water cut one after another. In the stage of extremely high water cut and declining production, the oil fields in eastern China have generally turned their attention to shallow beach areas with a water depth of less than 10 meters, according to experts. This field has become an important position for China's petroleum exploration and development. Offshore oil production has also become the hope of human demand for oil. Hainan-Yuedong oil field is a shoal area. In view of the complex geological characteristics of Yuedong Oilfield, the related laboratory research is carried out in this paper. The developed KCl-Sepolycol drilling fluid system can control the water loss at 70 鈩，

本文编号：1485330