Application Of Microsubstance Tracer In Changqing Oilfield

Trace material interwell tracer monitoring technology can accurately obtain the uniformity of material between reservoirs.These characteristics are mainly embodied in the influence of oil spalling efficiency,the connectivity between reservoir strata,the pairing between physical and chemical fluids and reservoir layers,and the tendency of injection and production.In addition,trace tracer technology can also be used to quantitatively analyze the tracer,so as to obtain the characteristics of reservoir saturation and permeability in the reservoir space.In general,reservoir permeability and pore structures are non-uniformly distributed in reservoirs with low permeability.Therefore,the use of micro-material inter-well tracer monitoring technology to understand the low permeability of the reservoir information,the rational injection of oil and gas have a certain value.Changqing Oilfield is the oil field with large oil production in China.The improvement of oil recovery efficiency and mining efficiency is of great significance to solve the national energy crisis.In the development process of Changqing Oilfield,the following problems have arisen in the development of Changqing Oilfield: for the low permeability reservoir,due to its lack of natural energy,the absorption capacity of water injection wells is poor,which leads to the decline of oil production too fast;increase the water injection pressure,The oil injection effect is not obvious;oil wells observed after the injection,the oil spill index decreased drama.These factors led to Changqing day oil recovery rate is low.Trace material intertroform tracer monitoring technology is a powerful weapon to understand the seepage law of injection,the use of this technique to study the seepage characteristics of Changqing Oilfield reservoir is of great significance to improve oil recovery.The injection process of trace material interwell tracer monitoring technology is simple,the use of stationary pipe column wellhead pouring or pumping,injection agent construction timeliness,with the short working hours,without special industry permit professional participation.After the injection,sampling regular with the frequency conversion,see through time and see agent as agent of water flooding velocity,water injection and surface,saturation and pressure distribution and fluid physical parameters such as channel spread information,can finally provide for oilfield water flooding layer adjustment,dynamic monitoring,polymer flooding profile control effect evaluation,residual oil saturation evaluation other services.At present,this technology is widely used in Changqing Oilfield,to determine the mainstream channels,water flooding and connectivity evaluation,crack distribution information more accurate and intuitive,obtained the recognition from more oil field units,workload has increased year by year,and the evaluation of the species gradually increased from single to pure connectivity distribution of the remaining oil is excessive,as an important basis for oilfield production,adjust the encryption measures.