Research and Application of Fracturing Technology for Tight Reservoirs

In view of the characteristics of low natural productivity, high operation pressure and multiple thin layers in the deep tight reservoirs of XH oilfield, the research and development of tight reservoir fracturing technology is carried out to improve the productivity of oil Wells. In this paper, On the basis of the analysis on reservoir compressibility through the rock mechanics experiment of the reservoir, the integration of geology and engineering, the segmentation and clustering, and the perforation with restricting fluid flow direction are adopted to improve the utilization degree of the reservoir. The experiment studied the migration law of proppants and the variation law of conductivity under different parameter conditions, which is combined with numerical simulation technology and the optimized combination ratio of proppants with different particle sizes to improve the conductivity of cracks. Make full use of the fracturing software to simulate the crack extension law of liquids with different viscosities, optimize the fracturing technology, and improve the success rate of operation. Deepen the understanding of reservoirs, optimize technology parameters, establish an optimization model of fracturing technology parameters, and form fracturing technology for tight reservoirs. This technology was applied on-site for 6 Wells, with a operation success rate of 100%. It achieved a maximum sand-to-liquid ratio of 9.3%, and the maximum daily oil production after operation reached 118.8m3, with an average daily production of 55.9m3. The effect was obvious. The successful breakthrough of this technology has enabled the upgrading and utilization of reserves in the XH oilfield, providing the main technical model for the efficient development of tight reservoirs in the XH Oilfield.