联合隔板理论和井底循环排液技术开发底水油藏新模型

A new model of combining improved barrier theory and DWL technology for bottom water reservoir development

刘峰,陈军斌,李红正,伍勇,卜盼盼,杨飞

西安石油大学石油工程学院，陕西 西安 710065 中国石化中原油田分公司工程技术管理部，河南 濮阳 457001 中国石油长庆油田分公司勘探开发研究院，陕西 西安 751500 中国石油长庆油田分公司第五采油厂，陕西 西安 751500

College of Petroleum Engineering, Xi′an Shiyou University, Xi′an 710065, China Research Institute of Exploration and Development, Changqing Oilfield Company, PetroChina, Xi′an 751500, China Department of Engineering and Technology Management, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China NO.5 Oil Production Plant, Changqing Oilfield Company, PetroChina, Xi′an 751500, China

底水油藏开发面临着底水锥进速度快、临界产量低、无水采油期短、含油污水处理费用和开发成本高等一系列问题。文中根据隔板理论和油井井底循环排液（DWL）技术开发底水油藏的不同机理，结合二者优点，提出了一种开发底水油藏的新方法，建立了底水油藏临界产量计算新模型。实例应用表明：新模型计算的临界产量分别是单一隔板理论和DWL理论临界产量的2.08倍和1.93倍。新方法不仅延长了油井无水采油期，提高了油井临界产油量，而且没有底水产出，避免了地层压降和能量损失。该方法对于科学、高效、合理开发底水油藏具有一定的借鉴和指导意义。

In the development process of bottom water oil reservoir, the issues facing the oil well include the fast bottom water coning, low critical yield, short water free production period, increased water treatment expenses, and exploitation cost. Based on the different production mechanisms of barrier theory and DWL method to develop bottom water reservoir, a new method of developing bottom water reservoir was put forward by combining the two production methods and a new critical production model was built. The example calculation shows that: compared with the single barrier theory and DWL theory, the new model can increase the critical production by 2.08 times and 1.93 times. The new method prolongs the period of oil well water free production, improves the critical oil production, and bottom water does not produce, and the formation pressure drop and energy loss are avoided. The new development mode has certain reference and guidance significance for scientific, efficient and reasonable development of bottom water reservoir.

10.6056/dkyqt202104021