钻关区生产动态变化规律——以B3区块为例

Change of Development Characteristics during Drilling and Shut-in Process:Taking B3 East Block as an Example

当前各大油田在实际钻关过程中普遍存在受产油量影响程度较大,开井恢复注水时含水率上升速度较快等问题。有必要搞清不同含水率阶段、不同关井时间对钻关动态的影响,明确钻关实施过程中不同油层开采特征。以B3区块钻关区为例,选取合适的地层参数建立理论模型;基于实际静、动态资料,编制不同的钻关方案,并进行数值模拟研究。研究注水井关井后和开井恢复注水后产液量、产油量、含水率及压力等指标的变化规律;对比分析钻关过程中不同油层的生产动态的变化规律。现场试验表明,数模结果与实际符合程度较高。此研究方法和结论可为其它油田钻关区钻关动态的预测提供有价值的借鉴,可用于指导钻关方案的设计和后期开发调整。

There are some problems in the process of drilling and shut⁃in of major oil fields at present.For example,the rising speed of water cut in the process of water injection recovery is fast,and the impact of drilling and shut⁃in on oil production is great.It is necessary to make clear the influence of different water content stages and different shut⁃in time on development indexes dynamic change.Taking the drilling pass area of block B3 as an example,the theoretical model is established by selecting appropriate formation parameters.Based on the actual static and dynamic data,different drilling schemes are worked out and numerical simulation is carried out.The change law of pressure drop,liquid production,water cut and oil production during drilling and shut⁃in process is studied and the production dynamics of different reservoirs during shut⁃in are compared and analyzed.The field experiment results show that the numerical model is in good agreement with the actual conditions,which can be used to guide the design of the drilling and shut⁃in schemes and the later development adjustment.The research method of this paper provides a valuable reference for the dynamic prediction of other drilling and shut⁃in areas.