裂缝气藏水侵机理及对开发影响实验研究

发布时间：2018-01-27 04:40

  本文关键词： 裂缝—孔隙型气藏 边底水 水侵机理 基质渗吸水 实验研究　出处：《天然气地球科学》2016年05期 　论文类型：期刊论文

【摘要】：针对裂缝—孔隙型气藏水侵规律及影响气藏采出程度机理的认识难题,采用物理模拟实验技术,开展了贯通水平裂缝条件下的水侵规律实验、储层基质渗吸水实验以及储层基质渗吸水后对储层供气机理的影响实验,明确了储层基质水侵与裂缝水侵的区别,认识了裂缝—孔隙型边底水气藏水侵规律及其对气藏产能以及采收率的影响机理,即裂缝水侵过程中边底水会沿裂缝快速突进、同时储层基质会渗吸水、基质渗吸水后减少气相渗流通道,从而增加储层基质气相渗流阻力,降低气藏稳产能力和最终采出程度,该项机理认识揭示了裂缝气藏水侵后导致气井产量、最终采出程度大幅度下降的主要原因。在上述机理认识基础上,进一步研究了贯通裂缝水侵前沿推进速度与储层物性、水体大小的关系,分类测试了不同渗透率储层基质渗吸水的能力,模拟评价了不同渗吸水方式和渗吸水量对气藏储层稳产能力和最终采出程度的影响,研究成果可以为我国塔里木盆地迪那气田、克深气田以及四川盆地磨溪龙王庙气藏科学开发提供技术支持。
[Abstract]:Aiming at the difficulty of understanding the water invasion law and the mechanism of influencing the recovery degree of the fractured porous gas reservoir, the experiment of the water invasion law under the condition of through horizontal fracture is carried out by using the physical simulation experiment technique. The experiment of reservoir matrix permeation and water absorption and the effect of reservoir matrix permeability and water absorption on reservoir gas supply mechanism make clear the difference between reservoir matrix water invasion and fracture water invasion. The law of water invasion and its influence mechanism on gas reservoir productivity and recovery factor are recognized, that is, the edge and bottom water will penetrate along the fracture and the reservoir matrix will permeate and absorb water during the process of fracture water invasion. The gas seepage channel is reduced after the matrix permeation, thus increasing the gas seepage resistance of the reservoir matrix, reducing the stable production ability and the final recovery degree of the gas reservoir. The understanding of this mechanism reveals the gas well production caused by the water invasion of the fractured gas reservoir. On the basis of the understanding of the above mechanism, the relationship between the advancing speed of penetrating fracture water invasion front and reservoir physical property and water body size is further studied. The ability of permeability and water absorption of reservoir matrix with different permeability is tested, and the effects of different water absorption modes and permeability on reservoir stability and final recovery degree are simulated and evaluated. The research results can provide technical support for the scientific development of Dina gas field, Keshan gas field and Moxi Longwangmiao gas reservoir in Tarim Basin, Sichuan Basin.
【作者单位】： 中国石油勘探开发研究院廊坊分院;中国石油天然气集团公司天然气成藏与开发重点实验室;中国石油青海油田分公司勘探开发研究院;
【基金】：国家科技重大专项项目“致密砂岩气有效开发评价技术”(编号:2011ZX05013-002)资助
【分类号】：TE37
【正文快照】： ence,2016,27(5):910-917.[胡勇,李熙U，

本文编号：1467593