Novel integration technique for improving recovery ratio of thick oil with high thickness and low yield
A recovery factor and heavy oil technology, applied in the fields of fluid extraction, earthwork drilling, drilling composition, etc., can solve the problems of lower crude oil quality, consumption of thin oil resources, hindering industrial development, etc., and achieve high applicability, Enhanced oil recovery and the effect of technological progress
Active Publication Date: 2010-10-06
XINJIANG DELAND
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The invention provides a novel integration technique for improving a recovery ratio of thick oil with high thickness and low yield. The technique comprises the following steps of: extracting the thick oil: preparing a thick oil dispersing drag reducer into 1 percent aqueous solution serving as a sample a and 0.125 percent aqueous solution serving as a sample b, mixing 1,900-2,500 milligrams/liter of sample a and 230-280 milligrams/liter of sample b uniformly, and injecting the mixture in a well by using a casing, mixing medicaments on the pump with the thick oil to form an oil-in-water emulsion, lifting the emulsion to the mouth of the well by an oil pumping unit, and feeding the emulsion in an oil-water separating tank through a pipeline; breaking the emulsion and separating water from oil: adding a corresponding amount of efficient thick oil demulsifier continuously to prepare 1 percent aqueous solution while the thick oil enters the oil-water separating tank, wherein the adding amount is 90-110 milligrams/liter, and the reaction time is more than 2 hours, namely, oil-water separated sewage is to be treated; treating and recycling the sewage: pumping the sewage in the tank, adding a special coagulant to prepare 2 percent solution, wherein the adding amount is 80-120 milligrams/liter, adding a composite anti-incrustation corrosion inhibitor simultaneously to prepare 2 percent aqueous solution, wherein the adding amount is 48-53 milligrams/liter; adding a DL-328 industrial sterilant to prepare 5 percent aqueous solution, wherein the adding amount is 85-115 milligrams/liter, and blending with clear water, and injecting in the stratum to retain the pressure balance of the stratum.
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