Optimization of the Horizontal Wellbore Length Based on Productivity

At present, the Dikken optimization principle is mostly applied during research on the horizontal length optimization of horizontal wells,namely when the friction loss reduces by 20%, the corresponding length is the optimal length of the horizontal well. Considering the friction pressure drop in the horizontal wellbore, the flow model in the oil reservoir, the flow model in the horizontal wellbore, coupling horizontal well and oil reservoir seepage were established. Using the conservation law of the fluid mass in the wellbore,based on the production capacity, the oil reservoir horizontal well optimum length formula was derived. And its sensitivity parameters were analyzed,and influence of the friction pressure drop on the production capacity was discussed. The model can determine the reasonable horizontal wellbore length,and is useful for the design of the horizontal well length.