Analysis of Influence Factors on Limit Obliquity of Inclined Well for Oil-gasPipeline Crossing along Soil Slope

摘要

Oblique well is used for traversing the loess gully or slope in the oil-gas pipelinernengineering. It is an important problem how to determine the limit obliquity ofrninclined well for the oil-gas pipeline crossing. Based on the stability analysis theoryrnof slope and the theoretical calculation formula of the limit obliquity of inclined well,rnthe limit obliquity of inclined well with different slope heights, slope angles, internalrnfriction angles, cohesion and weights are calculated based on a code written by thernauthors. The sequence of sensibilities is listed by orthogonal design. The results showrnthat the slope angle is the key factors that influencing the limit obliquity of inclinedrnwell and the influence degree from big to small is slope angles, internal frictionrnangles, cohesion, weights and slope heights. Therefore, the emphasis should bernplaced on the selection of slope angle in the design of limit obliquity of inclined wellrnfor Oil-gas Pipeline Crossing and the internal friction angle for the slope withrndefinite angle as well.