Appraising The Adaptability Of The Exploitation Well-patterns Of Chang6Reservor In Wuli Bay1^st Area

In the middle-high watercut development, chang6reservor of Wuli Bay1st area exposed many problems, such as water rising faster, rapid decline in production, change of the rule of oil-water seepage and the complex distribution of the remaining oil in the plane and profile and so on. According to these problems, how to effectively slow the rise, increase oil production, and how to make clear the discipline of the residual oil distribution in plane and profile in the reservoir, enhance water-flooding-oil recovery to the greatest extent. All of which are becoming the crucial problem. In this paper, a full investigation of Wuli Bay area development based on dynamic data, writer analysed the developmental law under the current well-pattern of high watercut stage, analysed the rule of watercut rising and yield declining, and its influencing factors. Using profile-log materials, saturation monitoring materials, side drilling materials, infilled wells and dynamic materials, the author studied the remaining oil distribution rule in reservoir plane under the current well-pattern. Using dynamic monitoring data evaluated vertical spreading efficiency of the current injection wells, studied the remaining oil distribution in the reservoir profile. On this basis, the author discussed the well-pattern and way of water injection, waterflooding efficiency under the current well pattern in detail, which included the waterflooding characteristic of the reservoir, degree of waterflooding control and producing degree, and carring water rate and water flooding index, and the ability for liquid of wells based and injection wells, such as injection-production spacing, producing ability for liquid of oil wells, injection wells ability of water, keeping-level of pressure and so on, appraising the current well network adaptability to reservoir, and then put forward infilling and adjustment technical measure, and demonstated encryption method and timing of encryption and proved it practicable.