Study On Identification Method Of Water-flooded Layer In A Block Of Liaohe Oilfield

Most of the oilfields in the Liaohe Oilfield have been mined for more than 30 years and have now entered the stage of water injection development,even in the development stage of medium and high water cut.With the increase of the degree of recovery,the cumulative water injection rate increased,the water content increased,the average single well crude oil production decreased,the difficulty of mining increased,which the water flooding layer identification and evaluation technology requirements continue to increase.The Liaohe Oilfield has used two techniques of rock pyrolysis analysis and pyrolysis gas chromatography to analyze the drilling coring and borehole coring samples,but the interpretation rate is low and the real-time interpretation is not achieved,and the digital model is established The request.In this paper,the method of evaporative hydrocarbon chromatography,geochemical pyrolysis analysis and light hydrocarbon analysis were used to evaluate the water flooding layer.The method of thermal evaporative hydrocarbon chromatography and geochemical pyrolysis were applied to the oil Study on Identification of Water-flooded Layer in Heavy Oil Block.In this paper,the thermal evaporation chromatographic analysis technique is mainly based on spectral visualization and spectral fitting method(which can be divided into gamma function morphological representation method,nonlinear function fitting spectrum method),hydrocarbon component spectral ratio method Interpretation of water flooded layers.The geochemical pyrolysis analysis technique mainly uses the pyrolysis parameters and the pyrolysis derived parameters to establish the interpretation plate method to evaluate the flooded layer.Light hydrocarbon analysis technology is mainly through the spectral diagram of intuitive,light hydrocarbon parameters interpretation of water flooding layer.In this paper,the method of using the spectral intuitionistic,gamma-shaped morphological characterization,hydrocarbon component spectral ratio method,pyrolysis parameters and derivative parameters is used to explain the evaluation plate.The heavy oil block is mainly used,Non-linear function fitting spectrum method,because there is no light hydrocarbon data in the subject,therefore,there is no light hydrocarbon analysis method applied to the actual block.In this paper,the method of spectral fitting is used to realize the mathematical model of spectrum,and to improve the interpretation of water-flooded layer.Based on the realization of digitalization of oilfield,"quality improvement" and "real-time interpretationand evaluation" Coincidence rate.It is of great significance to study and evaluate the waterflooding interpretation of Liaohe Oilfield at present.