Add virtual target to control horizontal well borehole trajectory design techniques

In recent years, Daqing oilfield applies horizontal well technology to develop poor thin oil reservoir more and more, the thinnest place of the oil-layers of the reservoir is only 0.6 m, in order to increase the drainage area the development process, the design length of horizontal section is long, in the face of such situation, when carries on the borehole trajectory design, According to the conventional single or double circular arc model linked trajectory will upward bias or downward bias, deviate from the geological development program gives the scope of the target window, resulting in loss of effective horizontal section.In order to meet the requirements of geology for orbit design, need to be in the horizontal well track design artificially add one or more virtual targets, and by fine-tuning the slope of the corresponding section, realizing the control of the borehole design track, meet the purpose of designed borehole trajectory within the reservoir. Not only reduces the construction difficulty of drilling while looking for oil-layer, and increase the rate of the drill in the reservoir, well meet the requirements of the reservoir development scheme for drilling engineering.