华北地区SY1井钻井技术难点及对策
|
摘要
SY1井是华北地区一口页岩气调查井,地质预测与实钻情况因邻井资料缺乏而偏差较大,钻进过程中会遇到诸如粘卡、垮塌、漏失、机械钻速低等多种复杂情况。采取优选钻头、调整钻井液体系、优化取心技术以及防斜打直技术等多种针对性措施,顺利完成了该井的设计和钻井任务。实钻结果表明,1 488～2 045 m层段的钙质泥岩及2 045～2 238 m层段的硅质胶结砂岩段钻进应侧重钻头的攻击性;全井钻井液性能调控应注重抑制性与防塌性;钟摆钻具组合起到了良好的防斜作用,绝大部分井段井斜控制在1°以内;优选的川7–4双筒取心工具,岩心收获率达95%以上。
SY1 well is a shale gas survey well, and the deviation between geological prediction and actual drilling is large due to the lack of adjacent well data. In the drilling process, there will be a variety of complex situations, such as stickiness, collapse, leakage, low drilling speed and so on. A design task of the well was successfully completed by adopting various targeted measures, such as optimizing drill bit, adjusting drilling fluid system, optimized coring technique and anti-slant straightening technique. The results show that the drilling of calcareous mudstone in the interval of 1 488～2 045 m and siliceous cementitious sandstone in the interval of 2 045～2 238 m should focus on the bit aggression. The performance control of drilling fluid should focus on inhibition and collapse prevention. Pendulum assembly had a good anti oblique effect, the vast majority of the hole deviation should be controlled within 1°. The optimized Chuan7-4 dual-barrel coring tool can achieve a core harvest rate of more than 95%.
SY1 well is a shale gas survey well, and the deviation between geological prediction and actual drilling is large due to the lack of adjacent well data. In the drilling process, there will be a variety of complex situations, such as stickiness, collapse, leakage, low drilling speed and so on. A design task of the well was successfully completed by adopting various targeted measures, such as optimizing drill bit, adjusting drilling fluid system, optimized coring technique and anti-slant straightening technique. The results show that the drilling of calcareous mudstone in the interval of 1 488～2 045 m and siliceous cementitious sandstone in the interval of 2 045～2 238 m should focus on the bit aggression. The performance control of drilling fluid should focus on inhibition and collapse prevention. Pendulum assembly had a good anti oblique effect, the vast majority of the hole deviation should be controlled within 1°. The optimized Chuan7-4 dual-barrel coring tool can achieve a core harvest rate of more than 95%.
引文
[1]邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641–653.
[2]张金川,金之钧,袁明生.页岩气成藏机理和分布[J].天然气工业,2004,24(7):15–18.
[3]刘洪林,王红岩,刘人和,等.中国页岩气资源极其勘探潜力分析[J].地质学报,2010,84(9):1 374–1 378.
[4]肖金裕,杨兰平,李茂森,等.有机盐聚合醇钻井液在页岩气井中的应用[J].钻井液与完井液,2011,28(6):21–23.
[5]魏晓亮,张金川,党伟,等.SY1井海陆过渡相页岩发育特征及其含气性[J].科学技术与工程,2016,16(26):42–50.
[6]王志刚.涪陵页岩气勘探开发重大突破与启示[J].石油与天然气地质,2015,36(1):1–6.
[7]郭少斌,付娟娟,高丹,等.中国海陆相交互页岩气研究现状与展望[J].石油实验地质,2015,37(5):535–540.
[8]王社教,李登华,李建忠,等.鄂尔多斯盆地页岩气勘探潜力分析[J].天然气工业,2011,31(12):40–46.
[9]李中明,张栋,张古彬,等.豫西地区海陆过渡相含气页岩层系优选方法及有利区预测[J].地学前缘,2016,23(2):39–47.
[10]孙少亮.中长筒保形取心技术在页岩气井中的应用[J].钻采工艺,2013,36(5):111–113.
[2]张金川,金之钧,袁明生.页岩气成藏机理和分布[J].天然气工业,2004,24(7):15–18.
[3]刘洪林,王红岩,刘人和,等.中国页岩气资源极其勘探潜力分析[J].地质学报,2010,84(9):1 374–1 378.
[4]肖金裕,杨兰平,李茂森,等.有机盐聚合醇钻井液在页岩气井中的应用[J].钻井液与完井液,2011,28(6):21–23.
[5]魏晓亮,张金川,党伟,等.SY1井海陆过渡相页岩发育特征及其含气性[J].科学技术与工程,2016,16(26):42–50.
[6]王志刚.涪陵页岩气勘探开发重大突破与启示[J].石油与天然气地质,2015,36(1):1–6.
[7]郭少斌,付娟娟,高丹,等.中国海陆相交互页岩气研究现状与展望[J].石油实验地质,2015,37(5):535–540.
[8]王社教,李登华,李建忠,等.鄂尔多斯盆地页岩气勘探潜力分析[J].天然气工业,2011,31(12):40–46.
[9]李中明,张栋,张古彬,等.豫西地区海陆过渡相含气页岩层系优选方法及有利区预测[J].地学前缘,2016,23(2):39–47.
[10]孙少亮.中长筒保形取心技术在页岩气井中的应用[J].钻采工艺,2013,36(5):111–113.