Research on Integrated Layer Determination and Fault Crossing Technology of Multi-branch Horizontal Wells for Surface Area Management

Shaopeng Song

doi:10.54097/6ca1x034

Authors

Shaopeng Song

DOI:

https://doi.org/10.54097/6ca1x034

Keywords:

Ground grouting; Multi-branch horizontal wells Corresponding authors; Azimuthal gamma; Trajectory control.

Abstract

Based on the application of multi-branch horizontal well technology in surface area management, combined with the hydrogeological structure of the coal bed floor, the method of determining the layer by azimuthal gamma, rock chip logging and drilling parameters is proposed. Combined with the change of azimuthal gamma, determine whether drilling encounters faults or not, put forward the technology of crossing faults when drilling encounters different types of faults, improve the rate of drilling smooth layer, reduce the leakage of drilling fluids, and form a set of key technologies of comprehensive stratigraphy judgment and crossing faults applicable to the grouting of multi-branch horizontal wells at the surface, based on the existing engineering examples, analyze the stratigraphy, tectonic conditions, and the application of comprehensive stratigraphy judgment and crossing faults technology in the case of directional drilling. The average smooth layer rate of Z1 and Z2 hole group is 96.96% and 99.2% respectively, which effectively ensures the quality of grouting in the fault structure area and is of great significance to the prevention and control of water damage in the mine.

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