体积改造油藏注水吞吐有效补充地层能量开发的新方式

发布时间：2018-10-16 14:22

【摘要】：体积改造技术能够提高超低渗透和致密油油藏的初期产油量,但衰竭开采期的产油量递减快、累积产油量低、经济效益差,且注水开发会导致油井快速水淹,需探索有效补充地层能量的开发方式。体积改造油藏注水吞吐开发是有效补充地层能量的一种新方式,首先建立体积改造油藏注水吞吐的3个阶段模型,研究渗吸产油和不稳定驱替双重开发机理,并推导相应的产能公式,理论研究注水吞吐的开发效果,进一步通过油藏工程方法和室内实验研究注水吞吐的主控因素,并结合现场开发实践论证了注水吞吐的可行性。研究结果表明,体积改造油藏产生的裂缝网络系统使得裂缝与基质之间的流体交换速度和数量均发生质变,注水吞吐已经从注水开发中的辅助作用上升为一种新的有效开发方式,从而为超低渗透和致密油油藏的有效开发提供新的开发思路,由于其附加开发成本低、投资效益高,有望成为超低渗透和致密油油藏有潜力的补充能量开发方式。
[Abstract]:The volume modification technology can improve the initial oil production of ultra-low permeability and tight oil reservoir, but the oil production decreases rapidly, the cumulative oil production is low, the economic benefit is poor, and the water injection development will lead to the rapid flooding of the oil well. It is necessary to explore an effective way to replenish the formation energy. Water injection huff and puff development is a new way to effectively replenish formation energy. Firstly, three stage models of water injection huff and puff are established, and the dual development mechanism of permeability, oil absorption and unstable displacement is studied. The corresponding productivity formula is deduced, the development effect of water injection huff and puff is studied theoretically, the main control factors of water injection huff and puff are further studied by reservoir engineering method and laboratory experiment, and the feasibility of water injection huff and puff is proved in combination with field development practice. The results show that the fluid exchange rate and quantity between fracture and matrix are qualitatively changed due to the fracture network system produced by volume modification reservoir. Water injection huff and puff has become a new effective development mode from auxiliary role in water injection development, thus providing a new development idea for the effective development of ultra-low permeability and tight oil reservoirs. Because of its low additional development cost and high investment benefit, It is expected to be a potential supplementary energy development method for ultra-low permeability and tight oil reservoirs.
【作者单位】：中国石油勘探开发研究院;
【基金】：中国石油科技专项“超低渗透致密油油藏有效动用开发新模式研究”(2016A-0216);“低品位油藏规模有效动用配套技术与对策研究”(2013A-0325)
【分类号】：TE357.6

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