论文详情
以大庆长垣喇嘛甸油田试验区为研究对象,在分析技术需求和难点的基础上,提出了以共享油藏模型为核心的(测)井(地)震(油)藏(模拟)一体化技术理念,通过井震融合和震藏融合技术的研究,形成了动态地震岩石物理分析、井控保幅高分辨率地震资料处理、井控精细构造解释、井震联合储层研究、地震约束油藏建模和地震约束油藏数模技术系列,建立了老油田剩余油分布预测技术流程。该技术流程和技术系列在研究区应用中取得了明显的效果,实现了断距2 m以上低级序断层的识别,构造解释平均相对误差小于0.08％,2 m以下薄储层识别符合率达86%,剩余油分布预测符合率80%。研究成果指导了15口井补孔方案的编制和实施,与措施前相比,平均单井增液量44.0 t/d,增油量8.9 t/d,含水率下降9.7%,为老油田挖潜提供了有效技术支持。研究表明,要想充分发挥地震技术在老油田挖潜中的作用,就必须遵从由地震到油藏,再回到地震的井震藏一体化工作流程;在地震资料处理和解释过程中必须突出井控,强调井震一致性;在油藏工程阶段要突出地震约束,充分发挥地震资料面上密集采集的优势。尽管如此,在井震藏一体化工作流程中仍有许多技术亟待研究与完善,如老油田复杂开发过程的地震岩石物理基础研究,储层孔隙结构和渗透性地震响应机理与预测方法研究,以及地震约束沉积微相自动成图技术与井震藏一体化软件平台研发等。
In a pilot site of Lamadian Oilfield,Daqing placanticline,we analyze seismic techniques requirements and challenges in reservoir characterization and propose an idea of well (logging)-seismic-reservoir (simulation) integration based on a shared reservoir model.Our researches focus on the integrated solutions including seismic-oriented dynamic petrophysical analysis,well-controlled high-resolution seismic data processing with amplitude preservation,well-controlled fine structural interpretation,joint well-seismic reservoir characterization,seismic-constrained reservoir modeling and seismic-constrained reservoir simulation;meanwhile,the workflow for predicting remaining oil in a mature oilfield field is built.The methodologies have been successfully applied in the pilot site.Low-grade faults with the fault throw larget than 2 m have been identified and the average relative error of structural interpretation is less than 0.08%; 86% of thin reservoirs less than 2 m have been delineated; 80% of remaining oil has been predicted.These research achievements have been used in reperforation planning and operation for 15 wells and support the mature oilfield development; daily per-well fluid production and crude output have been increased by 44.0 t/d and 8.9 t/d respectively and water cut decreased by 9.7%.The study indicates that multi-discipline integration techniques can promote the production in mature oilfield.By strictly obeying workflow of multi-discipline integration from seismic to reservoir and back to seismic again.Well controls should be enhanced in seismic data processing and interpretation with emphasis on well-seismic coincidence and seismic constraints is enhanced in reservoir engineering to play the advantage of high-density seismic data acquisition.Further studies in multi-discipline integration in mature oilfield development might involve seismic petrophysics,seismic responses mechanism and prediction of pore structures and permeability,seismic-constrained automatic mapping of sedimentary microfacies,and integrated software platform.
国家科技重大专项“大型油气田及煤层气开发”(2008ZX05010-002)资助。