發(fā)布時間：2018-01-27 04:40

  本文關鍵詞： 裂縫—孔隙型氣藏 邊底水 水侵機理 基質滲吸水 實驗研究　出處：《天然氣地球科學》2016年05期 　論文類型：期刊論文

【摘要】：針對裂縫—孔隙型氣藏水侵規(guī)律及影響氣藏采出程度機理的認識難題,采用物理模擬實驗技術,開展了貫通水平裂縫條件下的水侵規(guī)律實驗、儲層基質滲吸水實驗以及儲層基質滲吸水后對儲層供氣機理的影響實驗,明確了儲層基質水侵與裂縫水侵的區(qū)別,認識了裂縫—孔隙型邊底水氣藏水侵規(guī)律及其對氣藏產能以及采收率的影響機理,即裂縫水侵過程中邊底水會沿裂縫快速突進、同時儲層基質會滲吸水、基質滲吸水后減少氣相滲流通道,從而增加儲層基質氣相滲流阻力,降低氣藏穩(wěn)產能力和最終采出程度,該項機理認識揭示了裂縫氣藏水侵后導致氣井產量、最終采出程度大幅度下降的主要原因。在上述機理認識基礎上,進一步研究了貫通裂縫水侵前沿推進速度與儲層物性、水體大小的關系,分類測試了不同滲透率儲層基質滲吸水的能力,模擬評價了不同滲吸水方式和滲吸水量對氣藏儲層穩(wěn)產能力和最終采出程度的影響,研究成果可以為我國塔里木盆地迪那氣田、克深氣田以及四川盆地磨溪龍王廟氣藏科學開發(fā)提供技術支持。
[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.
【作者單位】： 中國石油勘探開發(fā)研究院廊坊分院;中國石油天然氣集團公司天然氣成藏與開發(fā)重點實驗室;中國石油青海油田分公司勘探開發(fā)研究院;
【基金】：國家科技重大專項項目“致密砂巖氣有效開發(fā)評價技術”(編號:2011ZX05013-002)資助
【分類號】：TE37
【正文快照】： ence,2016,27(5):910-917.[胡勇,李熙U，

本文編號：1467593