Download Advanced Water Injection for Low Permeability Reservoirs. by Ran Xinquan PDF

By Ran Xinquan

Concise and readable, Water Injection For Low Permeability Reservoirs offers operators with the right kind workflow platforms and engineering innovations for designing, making plans and imposing  water injection structures that would increase restoration components. while utilized in low permeability or ultra-low permeability reservoirs, water injection is without doubt one of the good value tools for making sure greatest construction premiums. This publication offers either theoretical research and sensible instances for designing and comparing water injection structures and realizing key creation variables focused on making special predictions for oil and water generating charges, water injection premiums, and restoration efficiency.

This ebook basically explains the features of ultra-low permeability reservoirs and linear move theories. those subject matters are then utilized to layout and implementation. program situations of 4 oilfields are integrated to aid boost strategies whereas illustrating the correct workflow for making sure waterflooding functionality research and optimization. The booklet can be utilized as a reference for box technical team of workers, or as technical aid for the administration personnel.

  • Discusses features of low and ultra-low permeability reservoirs and linear circulate theories
  • Provides precise examinations of features akin to pressure sensitivity, fracturing timing, and nonlinear move theory
  • Describes layout and implementation of complicated waterflooding systems
  • Includes actual case stories from 4 oilfields

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Additional resources for Advanced Water Injection for Low Permeability Reservoirs. Theory and Practice

Example text

As a result, water injection in these sandbodies can produce a prompt response in the producing wells, with the water-cut rising slowly. 07%. 2 Factors That Influence Well Responses Waterflood effects in ultralow-permeability reservoirs are different from those in high-permeability ones. Predicted from the relations between the radius and the time of pressure-wave effects, the breakthrough time in ultralow-permeability reservoirs is 3B6 months. But according to the Chapter | 1 Features of Ultralow-Permeability Reservoirs in the Ordos Basin 31 dynamic data acquired from actual reservoir development, it takes 4B8 months on average for waterflood to become effective in such reservoirs.

61 m/day). 09%), these producers can keep a relatively high productivity after water breakthroughs. 06 days) and water-cut rise (47%), and a sharper decline of productivity. A few wells may even experience explosive flooding. The indexes in the wells with the pore-fracture-type breakthroughs lie in between those of the former two types, with the rise of the water-cut influenced by the pressure and flow rate of water injection. Differences in water breakthroughs in oil wells are related to patterns of oil and water movement, which is controlled by geologic features of reservoirs.

678 MPa/m (Table 1-8). Under such a high-pressure gradient, it is hard to build up an efficient displacing pressure system with an injectorproducer distance of 300 m in the conventional method, but advanced injection can improve the efficiency of both injection and production. High Saturation Pressure of Oil in Place but Small Difference between Reservoir and Saturation Pressures With the small difference between the reservoir and saturation pressures, the former can easily drop below the latter.

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