Application of the technology of injecting cement for the stratified well completion to hydrogeological exploration
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摘要: 封隔注浆分层成井技术为多层水文地质钻孔分层成井提供了一种快速高效的新工艺。传统分层成井方法耗时长、效果差、止水效果不稳定，尤其是在细颗粒或钻孔结构不稳定的地层分层成井困难，易发生钻孔事故等问题。文章通过室内试验和野外施工，探索出封隔注浆分层成井。以HQ56水文地质孔为例，研究了分层成井、分段振荡洗井，并进行了分层抽水试验。研究表明，封隔注浆分层成井技术止水可靠，分层抽水试验数据准确。该技术尤其适用于细颗粒或钻孔结构不稳定地层快速分层成井。Abstract: The technology of injecting cement for the stratified well completion can provide a new rapid and high effective technology for the stratified well completion on a multi-layer hydrogeologic well. The problems of time-consuming, bad effect, unstable effect of sealing water, difficult construction and high failure rate of the stratified well completion for the stratum of fine grained or unstable drilling structure resulting from traditional methods of the stratified well completion are considered, and the technology of injecting cement for the stratified well completion is developed through laboratory tests and drilling construction. On the basic of the expounding principle and the process of the technology of injecting cement for the stratified well completion, the application example of the HQ56 hydrogeologic well from the stratified well completion, segment well-flushing and stratified pumping test of the hydrogeologic well is analyzed. The results show that application of the technology of injecting cement for the stratified well completion to seal water is reliable and the data from the stratified pumping test is accurate. The technology is especially suitable for the rapid stratified well completion on the stratum of fine grained or unstable drilling structure.
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