代旭
DAI Xu

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

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。
In the light of the development characteristics of the large-scale volume fracturing for the horizontal wells in tight oil reservoirs after the pressure depletion,the technique of massive waterflooding huff-puff was proposed,which can effectively complement the formation energy,enhance the production of the individual well and increase the economic benefit of the development. The technology was firstly defined and discussed in the following aspects:the mechanism,reservoir engineering,indoor test and numerical simulation etc.,and moreover the technical advantages were analyzed in the development of the tight oil reservoir. With the help of the pressure composition figures and the definition of the residual pressure of the injected water in the reservoir,the waterflooding huff-puff model was established and the critical parameters of the huff-puff were calculated,and furthermore the achievements were applied in the field. The obvious oil incremental and economic effects have been obtained for the pilottest,the oil production has enhanced by 4. 5 t/d for the individual well,the formation pressure has increased by9. 3 MPa,the accumulated oil production has reached to 1 987 t,the input-output ratio is up to 1 ∶ 1. 74 ～ 1 ∶4. 06. The researches on the technique have provided the thinking and important technical support for the high-efficiency development of the tight oil reservoir by means of horizontal wells

关键词(KeyWords)： 大液量注水吞吐;致密油藏;渗吸作用;水平井
massive waterflooding huff-puff;tight oil reservoir;imbibition action;horizontal well

Abstract:

Keywords:

基金项目(Foundation): 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)

作者(Author): 代旭
DAI Xu

DOI: 10.19597/J.ISSN.1000-3754.201701001

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