1.Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan Hubei 430074, China;2.Sinopec NorthChina Petroleum Engineering Co., Ltd., Zhengzhou Henan 450006, China
Clc Number:
TE324;P634
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Abstract:
With the increasing dependence on foreign oil and gas, unconventional oil and gas energy such as tight oil and gas and shale oil and gas have become the focus of China’s energy development. Well factory fracturing technology is widely used in unconventional oil and gas development because it can reconstruct low-permeability formations, significantly reduce construction costs, shorten construction time, improve equipment and land utilization. Based on the discussion of the development status of well factory fracturing technology, this paper introduces the well pattern deployment characteristics of cluster horizontal wells, such as wellbore direction, length of horizontal sections, wellbore spacing and further statistically analyzes the key technical parameters of horizontal wells in segmented clusters, such as fracture length, cluster spacing and perforating cluster number. Moreover, the fracturing methods commonly used in cluster horizontal well factory fracturing are also introduced, including dual-wells simultaneous fracturing, dual-well zipper fracturing and multi-well combination fracturing, and the advantages and disadvantages of the common fracturing methods are analyzed by contrast. It is suggested that the theories such as prediction of interwell fracture interference and well cluster fracturing perforation cluster design should be developed. The research points out the direction for the development of well fracturing technologies for unconventional oil and gas reservoir in China.