| 高密度抑制防塌冲洗液体系在四川营山SY-1地热井中的应用 |
| 投稿时间：2021-10-28 修订日期：2021-12-13 点此下载全文 |
| 引用本文：王永全,李世昌,张凯.高密度抑制防塌冲洗液体系在四川营山SY-1地热井中的应用[J].钻探工程,2021,48(12):86-93.WANG Yongquan,LI Shichang,ZHANG Kai. Application of the high-density， environment-friendly， anti-collapse drilling fluid system in SY-1 thermal well in Yingshan， Sichuan[J]. Drilling Engineering, 2021,48(12):86-93. |
| 摘要点击次数: 529 |
| 全文下载次数: 494 |
|
|
| 中文摘要:四川营山地下热矿水探采井SY-1井是一口地热资源重点勘查井，实际完钻深度2758 m，揭露三叠系上统须家河组热储层岩性以长石砂岩、粉砂岩为主，埋藏深度2220~2758 m，厚度538 m。下沙溪庙组岩性为灰绿色页岩、暗紫红色粉砂质泥岩夹黄褐色中厚层状粉砂岩及块状细粒长石砂岩，含高压气、卤水混合物，施工过程中需解决坍塌掉块、井涌、井漏、卤水污染、缩径等复杂难题。室内通过开展高密度抑制防塌钻井液流变性、防塌性、稳定性等控制方面的技术攻关，在优选钠基膨润土的基础上，通过对包被剂、降滤失剂（抗盐）、防塌剂等材料的筛选及优化，形成了高密度抑制防塌冲洗液的最终配方：清水+4%膨润土+0.1%纯碱+0.1%烧碱+1%~2%增粘剂HN-1+0.2%~0.5%环保大分子包被剂+1%~3%环保降滤失剂HJ-1+1%~3%抗盐滤失剂HLY+1%~2%环保防塌剂HFJ+重晶石。该配方密度1.50~1.80 g/cm3可调，滤失量4.0 mL，流变性能好，抑制防塌效果显著，在现场取得了成功应用，保证了该项目的顺利实施。 |
| 中文关键词:地热井 冲洗液体系 抑制防塌 高密度 流变性能 |
| |
| Application of the high-density， environment-friendly， anti-collapse drilling fluid system in SY-1 thermal well in Yingshan， Sichuan |
|
|
| Abstract:SY-1 geo-thermal mineral water well in Yingshan， Sichuan Province is a key exploration well for geothermal resources with actual drilling depth of 2758m. It was found that the lithology of the thermal reservoir of Xujiahe Formation in Upper Triassic is mainly feldspar sandstone and siltstone， with buried depth of 2220 to 2758m and thickness of 538m. The Xiashaximiao formation consists of gray-green shale and dark purplish red silty mudstone mixed with yellowish brown medium-thick layered siltstone and massive fine-grained feldspar sandstone， which contains a mixture of high-pressure gas and brine， where complex drilling problems such as well collapse， well kick， overflow， lost circulation and wellbore contraction were encountered. Lab research was carried out on control of rheology， anti-sloughing and stability of high-density anti-sloughing drilling fluids， and with premium sodium bentonite as drilling fluid base， the coating agent， the fluid loss reducer （salt-resistant）， the anti-sloughing agent， and other materials were selected to obtain the final formula of high-density anti-sloughing drilling fluid： water+4% bentonite+0.1% soda+0.1% sodium hydroxide+1% to 2% tackifier HN-1+0.2% to 0.5% environment-friendly macromolecular coating agent+1% to 3% environment-friendly filtrate reducer HJ-1+1%~3% salt-resistant filtrate reducer HLY+1% to 2% environment-friendly anti-collapse agent HFJ+barite. The formula has adjustable density of 1.50 to 1.80g/cm3， infiltration loss of 4.0ml， good rheological property， and remarkable anti-collapse effect； and has been successfully applied in the field and ensured the smooth implementation of the project. |
| keywords:geothermal well drilling fluid system inhibition and anti-collapse high density rheological property |
| 查看全文 查看/发表评论 下载PDF阅读器 |
