Oil Produktion Affected by ASP and Gelation Technologies

Проведено аналіз впливу технологій внесення інгібітору корозії ASP і технологій огелювання на рівень нафтовидобутку. Показано, що технології огелювання були розроблені для забезпечення більш ефективного вертикального розгорнення, для затоплення природно тріщинуватих порід-колекторів нафти. Наведено результати аналізу ефективності використання комбінації цих двох технологій, які, на думку автора, могли б розширити застосовність лужного поверхнево-полімерного заводнення.Gelation technologies have been developed to provide more efficient vertical sweep efficiencies for flooding naturally fractured oil reservoirs or more efficient areal sweep efficiency for those with high permeability contrast «thief zones». The field proven alkaline-surfactant-polymer technology economically recovers 15% to 25% OOIP more oil than water flooding from swept pore space of an oil reservoir. However, alkaline-surfactant-polymer technology is not amenable to naturally fractured reservoirs or those with thief zones because much of injected solution bypasses target pore space containing oil. This work investigates whether combining these two technologies could broaden applicability of alkaline-surfactant-polymer flooding into these reservoirs. Aluminum citrate-polyacrylamide, resorcinol-formaldehyde, and the silicate-polyacrylamide gel systems did not produce significant incremental oil in linear core floods. Both flowing and rigid flowing chromium acetatepolyacrylamide gels and the xanthan gum-chromium acetate gel system produced incremental oil with the rigid flowing gel producing the greatest amount. Higher oil recovery could have been due to higher differential pressures across cores. None of the gels tested appeared to alter alkaline-surfactant-polymer solution oil recovery. Total water flood plus chemical flood oil recovery sequence recoveries were all similar

Optimum formulation of asp for injection in oil reservoir

Проведено аналіз оптимального складу інгібіторів корозії ASP для нагнітання у нафтовий пласт. Звертається увага на проблему додавання води в нафтовий резервуар, що є, на думку автора, єдиним методом відновлення тиску в резервуарі.Enhanced Oil Recovery is not a new process and it has been utilized by the Oil and Gas industry for several decades, particularly in the use of water flooding as a secondary recovery measure to ensure maintenance of reservoir pressure.1Adding water to an oil reservoir may seem an odd thing to do- anything added to the reservoir should aid in maintaining reservoir pressure, so why add water, as oil and water do not mix? The problem is that most oil reservoirs are solution gas driven, this means that as the oil is produced the reservoir pressure is reduced and the gas that was held in solution is released and expands. This process drives the oil to the producing wells, however the gas is also free to flow and be produced. Once the gas is produced, the reservoir's energy is lost and reservoir pressure is reduced. If this process is the only method of recovery, it will only yield up to 20% of the reservoirs total volume