大液量注水吞吐技术在致密油藏水平井中的应用

发布时间：2018-12-12 23:30

【摘要】：针对致密油藏水平井大规模体积压裂弹性开采后期的油井开发特征,提出了大液量注水吞吐技术,该技术能有效补充地层能量、提高单井产量、增加开采经济效益。首次定义了大液量注水吞吐技术,并从机理、油藏工程、室内实验及数值模拟等方面分别展开了探讨,分析了大液量注水吞吐在开发致密油藏中的优势。利用压力构成图和油藏中注入水残余压力的定义,建立了注水吞吐模型并计算了注水吞吐的临界参数,且将这一结果应用于现场。先导性矿场试验取得了显著的增油效果及经济效益,单井日产油量提高了4.5 t/d,地层压力提高了9.3 MPa,累计产油量增加了1 987 t,投入产出比可达1∶1.74～1∶4.06。研究成果为致密油藏水平井的高效开发提供了一种思路和重要的技术支持。
[Abstract]:In view of the characteristics of oil well development in the late stage of large scale volume fracturing elastic production of horizontal wells in dense reservoir, a large amount of water injection huff and puff technology is put forward, which can effectively replenish formation energy, increase single well production and increase economic benefit of production. This paper defines the technology of large volume water injection huff and puff for the first time, and discusses the mechanism, reservoir engineering, laboratory experiment and numerical simulation respectively, and analyzes the advantages of large volume water injection huff and puff in the development of dense reservoir. By using the pressure composition diagram and the definition of residual pressure of injected water in the reservoir, a water injection huff and puff model is established and the critical parameters of water injection huff and puff are calculated, and the results are applied to the field. The pilot field test obtained remarkable oil increasing effect and economic benefit. The daily oil production of single well increased 4.5 t / d, the formation pressure increased 9.3 MPa, cumulative oil production increased 1 987 t, the daily oil production of single well increased 4.5 t / d, and the accumulative oil production of 9.3 MPa, increased by 1 987 t. The input-output ratio can reach 1: 1.74 1: 4.06. The research results provide a train of thought and important technical support for the high-efficiency development of horizontal wells in dense reservoirs.
【作者单位】：大庆油田有限责任公司勘探开发研究院;
【基金】：国家重大科技专项“大型油气田及煤层气开发”项目13“低渗—超低渗油藏有效开发关键技术”课题6“低渗、特低渗复杂油藏规模有效动用关键技术”(2017ZX05013006)
【分类号】：TE357.6

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