Application of deviation prevention and correction technology in Yishen-1 well

Under the influence of geological factors, the same bottom hole assembly (BHA) and drilling parameters are applied in different areas, and the effect of deviation prevention and correction is quite different. According to the characteristics of different blocks, the existing well deviation control theory is synthetically used to achieve the purpose of fast single well deviation control, cost reduction and efficiency increase. Yishen-1 well is a key pre-exploration vertical well of Sinopec. In the drilling process, the techniques such as the conventional pendulum drilling tool anti-deviation, straight screw composite drilling anti-deviation technology, curved screw combined with under size centralizer anti-deviation, single bending and double stable drilling tool anti deviation are successively used, together with electronic multi-point inclinometer technique, the mechanical while drilling inclinometer technique and the measurement while drilling (MWD) inclinometer technique, so as to achieve well trajectory trace control. Based on the comparative analysis of the application of various anti deviation and correction techniques and the principles of various anti deviation and correction technology, this paper puts forward the drilling assembly of each opening in the block, which can be used for reference for the same type of wells in Dayi area.