南海莺琼盆地高温高压井堵漏技术

韩成1 黄凯文1 罗鸣1 刘贤玉1 邓文彪1

(1.中海石油(中国)有限公司湛江分公司, 广东湛江 524057)

【摘要】南海西部莺琼盆地地质条件复杂,井底温度和压力高,钻进目的层过程中井漏频发。为解决井漏问题,在分析发生井漏主要原因的基础上,提出了将耐高温刚性堵漏材料和耐高温弹性堵漏材料相结合的思路。在钻井液中添加耐高温刚性堵漏材料DXD和耐高温弹性石墨堵漏材料TXD配制成堵漏浆,DXD在诱导裂缝中架桥,TXD在压差作用下充填于诱导裂缝剩余孔隙中,防止诱导缝进一步开启扩大,封堵诱导裂缝,提高地层承压能力。室内性能评价表明,堵漏浆密度最高可达2.40 kg/L,抗温能力可达200℃。堵漏浆在莺琼盆地多口高温高压井进行了应用,堵漏效果较好,堵漏成功率由采用常规堵漏技术的30%左右提高到了80%以上。这表明,该堵漏浆可以封堵莺琼盆地目的层的诱导裂缝,提高地层的承压能力和堵漏成功率,解决井漏频发的问题。

【关键词】 高温高压井; 井漏; 诱导裂缝; 堵漏剂; 莺琼盆地; 南海;

【DOI】

【基金资助】 国家科技重大专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)”(编号:2016ZX05024-005) 中海石油科技重大项目“莺琼盆地高温高压钻完井液、固井工艺研究与应用”(编号:CNOOC-KJ 135ZDXM 24 LTD ZJ 02)

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This Article

ISSN:1001-0890

CN:11-1763/TE

Vol 47, No. 06, Pages 15-20

November 2019

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Article Outline

摘要

  • 1 井漏原因分析
  • 2 堵漏浆构建及性能评价
  • 3 现场应用
  • 4 结论与建议
  • 参考文献