Study On Technical Policy Boundary Of Secondary Oilfield Development In Old Oilfield

Nowadays, along with the world economic recovery, expecially following the vigorous development of the emerging countries, urgent demand of people for crude oil is increasing, but less and less new fields are found, and difficulty of exploitation is growing, so people have to deliberate how to make use of abundant information of static geology and dynamic exploitation to deepen the understanding of maturing field, which can utilize new technologies, new methods and new equipments to explore maturing field deeply and to improve degree of reserve recovery. Our country is developing rapidly, but the gap of domestic demand for oil is bigger and bigger. What grim situation petroleum industry is facing with is gradually aging of oilfield, coming into high water cut stage, considerable remaining reserves and lager exploitation potential. Because of limits of applicable scope of the tertiary recovery and high cost, secondary recovery of the maturing field becomes necessary choice of solving realistic problems of oil shortage, and is an arduous and complex systematic engineering. The secondary recovery of maturing field should be implemented, only in this way, can we fundamentally change the degree of utilization of underground oil resources and realize sustainable development of Chinese petroleum resource.On the basis of consulting a large number of domestic and foreign literatures and collecting relevant information, taking Karamay oilfield for example, the theoretical knowledge of secondary recovery of maturing field is thoroughly and systematically studied. The main point is researched as follows:1. Production performance is analyzed and evaluated, which is basis of affording the project of limits of producing technique and tactics.2. Research on reservoir exploitation potential, which consists of forecast of water drive reserves, recoverable reserves and recovery.3. Research on limits of producing technique and tactics and offering rational suggestions, which consists of rational injection-production pressure, rational production rate, rational water injection rate and injection-production ratio, rational well spacing density and rational well-number ratio.By means of studies above, a set of project of limits of producing technique and tactics applying to secondary recovery of maturing field is formed, the content of the project is of scientificity and rationality, which helps to guide the similar oilfield exploitation.