濮城油田的整体开发调整

Integrated development adjustment in Pucheng oilfield

濮城油田整体处在特高含水开发阶段,产量自然递减高达20％以上。井网损坏严重、合注合采井多、地质基础研究薄弱、剩余油分布的定量认识程度不够是影响开发效果的主要因素。利用指数递减模型预测,在目前开发方式下,2006年油田产量将降至80×104t以下,含水率上升至96％。针对这些问题,提出了下步的挖潜措施:(1)重建、优化注采井网,提高水驱效果;(2)细划流动单元,弄清剩余油分布;(3)由分注合采向分注分采过渡;(4)评价难采储量,尽快形成接替。

Pucheng oilfield is in the development stage of extremly high water-cut, with the production decline rate of 27.36% .The main factors influencing development effect are: (1)a lot of commingled water injection and producing well; (2)severe damage of well network; (3)weak study of basic geology; and (4)the insufficient quantitative examination of remaining oil. Based on the forecast of production exponential decline model, oil production will be decreased to 800 thousand tons and water content will be increase to 96% in 2006, if the present development scheme is still used. In dealing with these probleums, the following measures have been proposed: (1)reconstruction of flooding pattern; (2)detailed division of flow unit and study of remaining oil distribution; (3)transition from zonal injection-commingled production into zonal injection and production; and (4)evaluation of the reserve difficult to produce.