Application of the technology of injecting cement for the stratified well completion to hydrogeological exploration

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.