武汉-1超深地热井钻井成井工艺

根据设计要求及地质特征,武汉-1超深井采用回转钻进、泥浆泵正循环、牙轮钻头钻进、钻铤给压钻进工艺,采用合理的钻探技术参数保证地热井结构及垂直度符合设计要求,并对泥浆进行降密度、提粘、提切并加入适量堵漏剂的方法堵漏,取得了良好效果。抽水试验说明该井出水能力较强,热储层含水层富水性较好,且水温不受气温影响,在井流试验过程中水温损失所占比例较小,证明了本井的钻井和成井技术是合理的。介绍了武汉-1井的钻井成井工艺及抽水试验成果。

Drilling and Completion Technology for WH-1 Ultra-deep Geothermal Well

According to the design requirements and geological characteristics, rotary drilling, mud pump positive cycle, cone bit, pressure by drill collar processes were adopted in the construction of Well WH - 1. The formation structure and spatial distribution of aquifer within logging depth were got through geophysical logging. Good plugging effect was obtained by mud density reduction, viscosity enhancing, mud thickening and adding an appropriate amount of blocking agent. The pumping test shows the good water yield ability, good water abundance in geothermal reservoir aquifer and the water temper- ature is not affected by air temperature. The water temperature loss is small in the well flow test, which proves that the drilling and completion technologies are rational. The paper introduced the Well WH - 1 about its drilling and completion technologies as well as pumping test results.