沧州盐矿古近系塑脆性地层取心钻头选型研究
投稿时间:2021-08-25  修订日期:2022-04-30  点此下载全文
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作者单位邮编
景龙 河北省地矿局第三水文工程地质大队 053000
李伟 河北省地矿局第四水文工程地质大队
 
061000
基金项目:河北省地矿局科技项目“沧州深部大口径盐矿钻进技术研究”(编号454-0601-YBN-MU6P)
中文摘要:论文:沧州盐矿普查项目完成三眼勘探孔,钻探深度达到3000~3451m,取心总长度达到3791m,取心层段主要为古近系塑脆性岩石。根据钻进特性,针对工区弹塑性层段和脆性层段提出钻头选型原则。结合施工实践,经过多次试验、改进,在累计使用的硬质合金、复合片、巴拉斯三类15种钻头中,通过典型钻头结构型式、碎岩机理以及使用效果进行了综合分析,优选出H-4-Ⅱ、F-3、F-6型三种钻头,在古近系地层取心钻进中效率高、取心质量好,适合工区地质条件,建议推广应用。
中文关键词:古近系  塑脆性地层  取心钻头
 
Study on coring bit selection for Paleogene plastic-brittle strata in Cangzhou salt mineJING Long1,2, LI Wei3
Abstract:Three exploration wells have been completed in Cangzhou salt mine general survey project, with the drilling depth ranging from 3000 to 3451m, and the total length of coring in Paleogene plastic-brittle formation was 3791m. Based on the drilling characteristics, the reasonable bit selection principle was determined for the elastic-plastic interval and brittle interval in the working area. After several tests and improvements, 15 kinds of bits were used, belonging to three categories, including alloy, PDC and Balas bits. The comprehensive analysis was carried out according to the bit structure, rock fragmentation mechanism and application effect, and three kinds of bits of H-4-Ⅱ, F-3 and F-6 were optimized. These bits have high efficiency and good coring quality when drilling in Paleogene strata, which are suitable for the geological conditions of the work area, and can be suggested to popularize and apply in this area.
keywords:Paleogene, Plastic-brittle formation, Coring bit
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