Study Of Description Methods Of Remaining Oil In DaQing OilField

In china, the developed oilfield has been passed through the long-term affusing development. At present, the majority of oilfields has entered the high watery time. Clarifies the reason that the remaining oil formed. Knows the rule that the remaining oil distributed. In china,the pointed technical policy and adjustment potentialities measure that has been adopted , effectively and reasonably develops the remaining oil, enhances the oilfield recovery ratio is the most urgent duty in developed the oilfield.In recent years , Regarding remaining oil distribution rule research. The domestic and foreign oil deposit worker has done the massive work, and they also has yielded very many results. But, the definiens of remaining oil distribution is extremely complex difficult systems engineering. It involves kinds of different technology and many discipline domain,There are many questions need be further diligently solved by the oil deposit geology and the oil-field development personnel. At present, the Daqing Oilfield is the same as the domestic other oilfields,it has entered the high watery time. In order to produce stably,do well the oilfield the following development, effectively develops the remaining oil reasonably and enhances the oilfield recovery ratio is most urgent duty.The author through research thoroughly the remaining oil origin and differenting geology development condition , Along with characteristic of development change log response and oil well logging information analysis assessment method,unite characteristic of production dynamic change. By using development geology and transfusion mechanics seeping. Oil well logging appraisal and the forecast remaining oil method have been worked by proposing set of synthesis multiple messages and the correlation data. The entire project divided into four parts:First, through analysis the characteristic of remaining oil origin and geological and oil well logging information. Lay the solid foundation for the oil well logging appraisal and the forecast remaining oil. To remaining oil origin and major effect factor research, mainly considered from macroscopic and the microscopic two aspects. In the host macroscopic. Container rock anisotropism is the primary factor. Container rock anisotropism mainly includes the size of penetration and the distribution of permeability ---the form of rhythm combination and penetration coefficient grading. In the microscopic. The rock wettability is the primary factor. Because the wettability different can create the different shape and curvature of the water-oil interface. As the water-oil through the hole, some part of oil will be stop, and keeps in the passageway to form the remaining oil(Residual oil).As rock surface first wet,the remaining oil is the single bead shape. As first oil, the remaining oil is the lifting condition. To flooding level log response characteristic research.Mainly considered from two aspects : First, electrical resistivity logging response characteristic research. By the Ariche's formula that mainly using electrical resistivity logging material quota seeking oil saturation , researching the question.Because man may transforms the geological parameter into the oil well logging information by using the formula,simultaneously also can transform the geological parameter into the oil well logging information. Second, according to oil deposit transfusion and log response characteristic, establishment oil well logging appraisal remaining oil model.Through the foundation that the flowing unit division, through core sample scale division and mobile unit restraint. Proposed carries on the fine division and the assessment method and the model using the bare well log information and the production log material to the flooding level characteristic. And base on reservoir oil,and the theory of water two transfusions and water-oil displacement.Establishment remaining oil performance forecast model. In view of bare hole oil well logging appraisal model establishment, there are two formation.It's that based on Ariche's formulat basic appraisal model and based on analysis statistics experience model. Two kind of models have each one to be suitable the condition.Third, the key technologies in the project research process has been solved. Regarding dissimilar condition development well and water-injection well. Proposes the current capacity adjustment and an output method. The way that oil layer fluid transfusion penetration coefficient grading division, starting pressure gradient determination, relative permeability type division, reservoir correspondence processing and performance forecast model parameter adjustment. The method and technology that non-continual perforation data processing, the measure production increase increases the note to the reservoir transfusion ability influence.Fourth, the remaining oil appraisal and the forecast software has been established.Main purpose of the topic are that the remaining oil origin, the controlling factor and the remaining oil appraisal and the forecast method unify. Realization to remaining oil appraisal and forecast software. Forms the remaining oil distribution description technology.According to fundamental research in topic,unifies data system which existing or at present can consummate, completed the remaining oil to describe the software design and the development work. The software uses the database to carry on the unification management to the data。Simultaneously man has completed well the data front post-processing。Causes the appraisal and the forecast master program merges into one organic whole with the first post-processing. Removed the different of personnel level and the experience. There is the higher promoted application prospect. In he research technique, many documents of existing remaining oil analysis were used.(Static geological data, production performance material, core analysis examination material, bare hole logging,production logging,cased borehole logging document,fluid analysis document and so on).The documents were been mix together,and experiences of the expert applies in the remaining oil forecast research by the software form. Forms the fast remaining oil description software. Increases the remaining oil appraisal precision. Removed existence difference that were been made by the personnel have the different level and experience,There are the higher promoted application prospect.