Jingbian Gas Field Horizontal Well Bore Pressure And Capacity Computing Research

As the improvement and development of the horizontal well technology, more and more horizontal wells has been applicated for oil and gas exploration, and it is especially shown significant advantages for low permeability gas reservoir exploitation. Jing Bian Gas field is a typical large and complex field of low permeability, low abundance and low-yielding, and now it has been developed by using horizontal well technology. When using horizontal well, it is necessary to determine productivity and the optimal length of the horizontal well.On the bases of large number of literature research, this paper first established the pressure calculation model of vertical and slope well, and the influential factors were analyzed. According to the gas flow theory and the flow characteristics of horizontal well, reservoir flow model was established, and non-Darcy flow and formation damage factors were considered in the model. According to the hydromechanics theory, horizontal well flow model which included fiction and acceleration pressure drop was established. The reservoir flow model and horizontal well flow model were coupled together under the mass balance condition, and the pressure calculation model was established. The horizontal well pressure and pressure drop was calculated of Jing Bian gas field through software programming, and the influential factors were also analyzed.Based on the horizontal well pressure calculation model, this paper also studied the productivity calculation model and determined the reasonable length of horizontal gas well, and the productivity and reasonable length were calculated through software programming, and the influential factors were also analyzed.This research have practical significance for Jing Bian gas field using horizontal well, at the same time, it has theoretical significance to research the question in using horizontal gas well.