Injection And Correlation Analysis

Now most waterflooding oil fields have many distinguishing factors , such as higher well pattern-controlling, higher producing reserves ,more serious interlayer and plane heterogeneity, remaining oil distributing more complex, production declining more fast, etc. These problems mainly show on wrong producer-injector structure , lower formation energy ,pressure imbalance. In order to solve these problems, the paper has discussed the injection-production relationship based on injection well.Injection-production relationship is defined as that, using the method of production well for reference, studies the relation between injection wells and oil wells based on the unsteady percolation flow .On the theory of injection-production test well, it provides the objective evidence for injection-production adjusting plan by means of contrasting test. The paper concludes that the injection well influences so greatly productivities , waterflooding effects and recovery efficiency that systematic studies have been given .The paper has gone on systematic researches for injection-production relationship on the theory and method . Combined with a new well test ,the paper has gotten three analysis methods based on the unsteady percolation flow, has studied the injection-production relationship in view of the quantity and quality and has formed a more systematic method. Meanwhile, the paper has concluded a percolation model for injection-production well test of dual media in a infinite formation ,and has also solved both the approximate solution on real space with injection pressure drawdown test on the center of a injection well and the exact solution on Laplace transform space separately on the center of a injection well and an oil well. It would provide basis for interpreting methods of injection-production well test. The approximate solution shows that there is a rectilinearity in the pressure and time semilogarithmic coordinates. And the slope and intercept of line are decided by injection-to-production ratio , injection-production well spacing, the ratio of injection-production thickness, the ratio of injection-production productivities. Also has the paper made the exact solution into many modern theory charts with parameters ,such as injection-to-production ratio, injection-production well spacing, injection- production pollution ratio.Applying the above theory and method into V oil Group of Shuanghe oil Field , the paper has done the research in detail : using the contrasting test data with 13 injection well groups ,58 production wells and the pressure drawdown data with 7 injection wells and 9 times shut-in and analysis the percolation characteristic of V oil group . The paper discuss the relationship of water and oil wells from the point of the quality and quantity . The paper also solved the producing problem between one injection well with muti-production well and one injection with one production well percolation models. Moreover, the interpretation has been given withHorner Curve for V oil group pressure drawdown data .The relationship and exactness of injection-to-production ratio have also been studied .At last, based on the injection-production relationship and considering with water invasion , injection, distributing of energy and remaining oil and injection structure ,the paper made a injection-production adjusting plan . According the plan, the production result is very good.The paper has developped the software -"Injection-Production Well Test Analysis ". So the injection-production relationship has become more benefit.