發(fā)布時間：2018-05-16 16:39

  本文選題：高溫高壓 + 天然氣藏��； 參考：《地球科學》2017年08期

【摘要】：鶯歌海盆地X區(qū)屬于高溫高壓氣藏,水溶氣含量大,水溶氣釋放對氣水界面及水侵規(guī)律的影響不明.通過PVT物性分析儀,采用復配的天然氣和地層水測試了X區(qū)不同區(qū)塊水溶氣溶解度變化規(guī)律.設計可視化填砂管實驗,探索了水溶氣釋放對氣水界面的影響規(guī)律.研究表明:水溶氣溶解度受溫度、壓力、地層水礦化度和天然氣組分的影響,隨壓力的增大逐漸增大,隨溫度的增大先減小后增大,拐點溫度為80~90℃,地層溫壓條件下(145℃,54MPa)X-1區(qū)塊水溶氣含量為22.5m~3/m~3,X-2區(qū)塊為8.7m~3/m~3.可視化填砂管實驗研究表明:衰竭開采過程中,水溶氣不斷釋放且攜帶地層水運移,同時在地層水自身泄壓及毛管力作用下,氣水界面明顯上升.在此基礎(chǔ)上,數(shù)值模擬氣藏衰竭開采表明:水溶氣溶解度越大氣水界面上升越快,氣井見水越早.預測期10a中,考慮水溶氣時,X-1區(qū)要早800d見水,平面上推進快800m,縱向上推進快7.3m;X-2要早300d見水,平面上推進快近500m,縱向上推進快7.0m.
[Abstract]:The X area of Yinggehai Basin belongs to high temperature and high pressure gas reservoir, the content of water dissolved gas is large, and the influence of water soluble gas release on gas-water interface and water invasion law is unknown. By means of PVT physical property analyzer, the solubility of water soluble gas in different blocks of X area was tested by using compound natural gas and formation water. The experiment of visualized sand filling pipe was designed to explore the effect of water solution gas release on gas-water interface. The results show that the solubility of water soluble gas is affected by temperature, pressure, salinity of formation water and natural gas component, which increases with the increase of pressure, decreases first and then increases with the increase of temperature, and the inflection point temperature is 80 ~ 90 鈩，

本文編號：1897617