唐山马头营干热岩M-2井钻井工艺

张云; 高亮; 田增霞; 宋玺权; 刘现川; 赵岩

doi:10.19388/j.zgdzdc.2023.01.13

唐山马头营干热岩M-2井钻井工艺

河北省煤田地质局第二地质队(河北省干热岩研究中心),河北邢台 054001

基金项目: 河北省科学技术厅“河北省唐山市马头营凸起区干热岩开发关键技术集成研究与示范(编号: 20374102D)”项目资助

详细信息

作者简介:
张云(1986—),男,工程师,主要从事大口径钻探施工技术与生产管理工作。Email: 654548440@qq.com。

通信作者:
高亮(1984—),男,高级工程师,主要从事矿产资源勘查、研究评价及钻探技术管理工作。Email: 112857313@qq.com。

中图分类号: TE242
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出版历程
- 收稿日期: 2022-02-21
- 修回日期: 2022-12-07
- 刊出日期: 2023-02-19

Drilling technology of Well M-2 in Matouying dry hot rock of Tangshan

No.2 Geological Team, Hebei Coal Geology Bureau (Hebei Dry Hot Rock Research Center), Hebei Xingtai 054001, China

摘要

摘要: M-2井为马头营干热岩开采试验井组的采出井,为解决M-2井在钻进过程中新生界地层坍塌、钻头泥包、太古界花岗岩地层钻进效率低、溢流、掉块以及高温钻井液等施工难点,进行了钻井关键技术研究。通过增加钻井液比重、降低滤失量、提高黏度,维护了新生界井壁稳定性; 采用双泵大排量、转盘高转速旋转,解决了钻遇新近系钻头泥包问题。在井深3 880 m处,通过提高泥浆比重,并加入随钻堵漏剂,有效遏制了溢流、大消耗和掉块; 通过改进耐高温钻井液,提高了泥浆的流变性,降低了摩阻和转盘扭矩,保障了M-2井的顺利完井。通过更改钻具组合,采用大螺杆、大钻压、大排量、粗径钻具,使M-2井在太古界变质花岗岩地层中平均钻速达到2.46 m/h,比M-1井同地层纯钻速提高了69.7%,降低了钻探成本。旋锤机配合金刚石复合片(polycrystaline diamond compucts,PDC)钻头提速实验,证明了该方法可有效提高钻进效率,但变质花岗岩地层较硬、研磨性强,PDC片易崩坏,钻头性能仍有待改进。相比而言,采用ϕ203 mm螺杆+牙轮钻头钻进整体效益更高,可作为后续施工中的优选方案。
- 干热岩 /
- M-2井 /
- 钻井工艺 /
- 大直径螺杆复合钻进
Abstract: Well M-2 is a production well of Matouying dry hot rock mining test well group, and the key techniques during drilling were studied to solve the problems of Cenozoic Formation collapse, bit balling, low drilling efficiency of Archaean granite formation, overflow, block falling and high temperature drilling fluid. The wellbore stability of Cenozoic Formation was maintained by increasing the specific gravity of drilling fluid, reducing fluid loss, and increasing viscosity. The problem of bit balling in Neogene Formation was solved by using double pumps with large displacement and high rotary speed. The overflow, large consumption and block loss were effectively prevented in the well depth of 3 880 m, through the increasement of mud gravity and the addition of plugging agent. By ameliorating the high-temperature resistant drilling fluid, the rheology property of sludge was improved and the friction and rotary torque were reduced, which guaranteed the success of Well M-2 completion. The average drilling speed of Well M-2 in Archaean metamorphic granite formation reached 2.46 m/h, which was 69.7% higher than that of Well M-1 in the same formation, and the drilling cost was reduced by changing the drilling assembly and using drilling tools with large screw, large drilling weight, large displacement and coarse diameter. This method can effectively improve the drilling efficiency by the rotary hammer and PDC bit speed increase experiment. However, the metamorphic granite formation is hard and abrasive, PDC pieces would easily collapse, hence the bit performance still needs to be improved. The overall benefit of assemblage of ϕ203 mm screw and roller cone bit was higher, which can be used as the optimal scheme in subsequent construction.
- hot dry rock /
- Well M-2 /
- drilling technology /
- large diameter screw combination drilling

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施引文献(2)

期刊类型引用(2)

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