Method for increasing oil reservoir adaptability of self suspending proppant

Abstract

The invention belongs to the technical field of oil reservoir and gas reservoir fracturing, and specifically relates to a method for increasing the oil reservoir adaptability of a self suspending proppant. For preparing the self suspending proppant with maximum thickener adhesion capacity, quartz sand, ceramsite or a mixture of the quartz sand and the ceramsite is used as a proppant, partially hydrolyzed polyacrylamide, functional polymer or guar gum is used as a thickener, and saccharose, polyol resin or a resin material is used as an adhesive. The method comprises the following steps: mixingthe self suspending proppant with common proppants according to proportions of 10:1, 9:1, 8:1, 7:1, 6:1, 5:1, 4:1, 3:1, 2:1 and 1:1, thus obtaining a mixed proppant; measuring complete suspending time and start-to-sediment time of particles of the mixed proppant under the conditions of target oil reservoir temperature, a solvent-water and a 'liquid-to-sand' ratio, and drawing a relation curve about the complete suspending time and the start-to-sediment time with a mixing ratio; determining the mixing ratio from the relation curve according to a target oil reservoir. According to the method disclosed by the invention, the oil reservoir adaptability of the self suspending proppant is greatly increased, and the economic benefit is increased.

Description

Technical field: [0001] The invention belongs to the technical field of oil and gas reservoir fracturing, and in particular relates to a method for improving the adaptability of self-suspension proppant oil reservoirs. Background technique: [0002] Hydraulic fracturing, as a technology for oil and gas reservoir stimulation, is the most effective method for increasing production of oil and gas wells and increasing injection of water injection wells. In recent years, the development of tight oil and shale gas has made a great contribution to alleviating the contradiction of world energy supply, which is inseparable from the development of fracturing technology. With the gradual expansion of the application field and construction scale of fracturing technology, the consumption of proppant and fracturing fluid is increasing year by year. Fracturing technology has released tight oil and shale gas production capacity, which has also caused global oil and gas supply to exceed dem...

AI Technical Summary

Problems solved by technology

[0003] Since there are differences in reservoir temperature, solvent water salinity, and “liquid:sand” ratio of different fracturing targets, it is necessary to adjust the performance of self-suspending proppant products (that is, adjust the type of proppant and change the adhesion of thickener). volume) to meet the requirements of different reservoir technical indicators, which greatly increases the number of self-suspending proppant product specifications and the cost of production, storage and management

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