Abstract:

With the improvement of drilling technology, the horizontal wells have been broadly used to develop the bottom water and edge water drive reservoirs. Compared with the vertical well, the horizontal well can get more oil at the same schedule. But it is very difficult to get the 3-D flow solution of a horizontal well in an edge water drive reservoir. Based on the hypothesis of the horizontal well located in the center of a circular bounded reservoir with top and bottom sealed boundaries, a procedure to evaluate the productivity of the horizontal well is presented by means of the principle of superposition and Fourier transform to the system. Compared with the 2-D Joshi productivity formula, it is more close to the factual horizontal well productivity in the oil field. Results from the paper can be used to calculate the horizontal well productivity.

Key words: edge wate drive reservoir, circular bounded reservoir, horizontal well productivity, Fourier transform, principle of superposition