In offshore oil and gas engineering, pipeline abandonment is unavoidable and its mechanical analysis is necessary and important. For this problem, a numerical model is developed in this study to evaluate pipeline abandonment for the J-laying method. The whole system considered in this model is divided into two parts: the A&R cable and the pipeline in the water. A catenary model was proposed for the former, and the latter is solved by a numerical iterative method. In addition to the boundary conditions at the two end points, a special set of boundary conditions is required at the junction that connects the cable and the pipeline. Furthermore, a parametric study is performed to study the effect of the length of the pipeline, the horizontal distance between the two end points, the pipe-cable length ratio, and the depth of water on the pipeline abandonment. The proposed model can help develop deepwater pipeline abandonment and analysis.

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