液流空化技术在注采井间储层微改造中的应用——以渤海S油田B1-B2井组为例
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Application of Liquid Flow Cavitation Technology in Microtransformation of Reservoir between Injection and Production Wells:Taking the B1-B2 Well Group in Bohai S Oilfield as an Example
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    摘要:

    井筒附近储层污染引起的注水井吸水能力下降,通过酸化、微压裂和提压注水等常规措施可以得到有效解决,但远离井筒附近因储层连通性差造成的注水井注水能力下降还没有很好的解决措施。如渤海S油田B1井,在注水过程中,注入压力逐渐升高,长期无法达到配注需求,对应生产井注水见效差,处于低效状态。其原因是距B1井100 m左右有低渗带存在,致使注水井与生产井之间储层连通性变差。因为常规措施处理半径有限,无法对这种低渗带进行改造。因此需要寻找新的工艺措施,既能满足处理半径足够大,同时对低渗带进行微改造,根据液流空化储层改造技术的原理可知,该技术可以满足这个条件。B1井实施液流空化后,无论是注水井吸水能力还是对应生产井生产形势都得到了明显改善。该技术的成功实施,解决了一直困扰渤海油田注采井间因储层连通性差、注水效果差的难题,为其他油水井类似问题的解决指明了方向,可以有效改善其注水开发效果。

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    The decrease in water injection capacity caused by reservoir pollution near the wellbore can be effectively solved through conventional measures such as acidification, microfracturing, and pressure boosting water injection. However, there is no effective solution for the decrease in water injection capacity caused by poor reservoir connectivity near the wellbore. For example, during the water injection process of Well B1 in Bohai S Oilfield, the injection pressure gradually increases and cannot meet the injection requirements for a long time. The corresponding production well has poor water injection efficiency and is in a low efficiency state. The reason is that there is a low permeability zone about 100m away from Well B1, which leads to poor reservoir connectivity between the injection well and the production well. Due to the limited processing radius of conventional measures, it is not possible to transform this low permeability zone. Therefore, it is necessary to find new process measures that can meet the requirements of having a sufficiently large treatment radius and conducting micro modifications to low permeability zones. According to the principle of liquid flow cavitation reservoir modification technology, this technology can meet this condition. After implementing liquid flow cavitation in Well B1, both the water absorption capacity of the injection well and the production situation of the corresponding production well have been significantly improved. The successful implementation of this technology has solved the problem of poor reservoir connectivity and poor water injection efficiency between injection and production wells in Bohai Oilfield, and pointed out the direction of measures for similar problems in other oil and water wells, which can effectively improve their water injection development effect.

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柴世超,徐玉霞.液流空化技术在注采井间储层微改造中的应用——以渤海S油田B1-B2井组为例[J].科技与产业,2024,24(06):282-286

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  • 在线发布日期: 2024-04-12
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