It has been observed that an infill horizontal production well was much more productive after system re-pressuring by water than before. This has led to the simulation development of a proposed new enhanced oil recovery scheme. The idea behind the pressure cycling scheme is to restore the reservoir's primary production conditions and to exploit them efficiently through the use of infill horizontal production wells. Primary production conditions are restored with good conformance by injecting produced gas, and then water, so as to re-saturate the reservoir oil by the time water injection raises pressure to around original reservoir pressure. The production phase of the cycle then follows. This process can be repeated several times (until it reaches the economic limit) while maintaining useful rates and amounts of production even in quite thin reservoirs (5 m).

You can access this article if you purchase or spend a download.