Karamay Oilfield Aging Oil Recovery Experiments

Oil is the important foundational energy to the national economy. In recent years, the domestic petroleum demand is strong, the consumption has a large growth, but the domestic petroleum output increases a little, the contradiction of supply and demand is prominent. Now many big oil/gas fields have entered the development mid and late part. The reduction of the stratum productive capacity, the increase of water cut and other complex situations cause the unceasing advances of exploitation difficulty and the unceasing reduction of production efficiency. On the other hand, one part of crude oil has become aged oil which can not apply and brings about the energy waste. For example, the besides leaking of oil well pipe and other ground crude oil, the well conditioning used liquid, the sewage accident pool, the emulsified crude oil containing different kinds of chemical agent which is reclaimed by sewage-treatment plant, the emulsion which is exhausted by crude oil processing device and the dirty oil which is expelled by different kinds of oil well task, the dirty oil of tank bottom, ect.. So the aged oil recovery and quadric use will become a new growth pole to our national crude production rate and have an important realistic significance to insure the balance of the oil markets supply and demand.This article take representative aged product (heavy oil and thin oil) in the Kelamayi Oil Field as the object of study, and take the experiment as the research method, closely revolves the aged product to recycle this subject below, mainly develops works:(1) Thoroughly Investigated the origin from the Kelamayi Oil Field aged product, has selected the aged product from the representative red shallow heavy oil processing station, thin oil processing stands with the Che Pai Zi united station, as the object of study, separately to the dross, the water drop diameter and contact surface film thickness carries on the microscopic image formation analysis, further has been clear about this article object of study.(2) From crude oil cream formation mechanism obtaining, has thoroughly analyzed the aged product emulsifier origin and the emulsion forming process, then the research emulsion stable mechanism, and take the dehydration rate as a goal, has developed the agitation intensity, the crude oil composition, fluid parameters separately and so on bead diameter, water-oil interface membrane, high-molecular compound to the old carburetion stable sensitivity experiment, have provided the important foundation data for the old carburetion emulsion breaking recycling.(3) Normal demulsification dehydration technology such as Heating demulsification,electrical demulsification,centrifugal dehydration and chemical demulsification etc, are adopted separately in demulsification dehydration experiment of aged oil . Thermochemistry-centrifugal dehydration technology are found to solve the demulsifucation of aged oil, and the choose principle of deemulsifier is proposed. Dehydration experiments are carried on separately to the four primary election deemulsifier in different prediction time, dehydration temperature, chemical feeding concentration, and choosed the rightful additive, ascertained the experiment condition of demulsifucation dehydration of aged oil.(4) Based on the water-drop subside theory, the affecting factors of centrifugal dehydration of aged oil are evaluated, the importance of each affecting factor is ascertained. Then the orthogonal experiment research of each affecting factor are carried on , rightful technology parameters are ascertained. Those are important technical foundation of successful on-site simulated test.(5) Based on the comparative analysis of the experiment results in crude oil mixed steam or hydrothermal water and crude oil emulsification in the cause of heating, the rightful heating approach is ascertained. The butterfly separation technology is drawn in the separation of solid particles, and the processing method of sludge is given classifiably. Then the on-site experiments parameters of aged oil recycle are ascertained reasonably. The respective aged oil from Hong Qian Da Ba and Che Pai Zi of No. 1 Oil Plant, Zheng Fa Chang of Heavy Oil Plant, 81# station of No 2 Oil Plant are recycled by the new system.