柴達(dá)木盆地澀北二號(hào)生物氣田微構(gòu)造對(duì)氣藏氣水分布動(dòng)態(tài)變化的控制
[Abstract]:In view of the problems of water intrusion direction prediction and well pattern adjustment in the later stage of development of Shibei No. 2 gas field, considering comprehensively the characteristics of water gas reservoir in the edge of anticline structure, it is put forward that based on the study of microstructures and combined with actual production data, The control effect of microstructures on gas and water distribution in gas reservoirs is analyzed. The results show that the gas-water boundary defined by the microstructural map is more in line with the actual production, and the location of the negative microstructures is obviously higher than that of the movable water saturation, and the water invasion area has a high correlation with the movable water saturation. The average daily water production in a negative microstructural development well is 10.26 mm3, and that in a forward microstructural development well is 1.52 mm3. The results show that: (1) there is a good correlation between the distribution trend of gas-water boundary line and the distribution trend of microstructural contour of gas reservoir, which indicates that the gas-water distribution characteristics of gas reservoir are obviously controlled by micro-structural distribution characteristics; (2) the water invasion in gas reservoir usually occurs first in the low edge of the gas reservoir, the small trench and other negative microstructures, (3) the water body of the edge water in the negative microstructural belt is large, the driving force of the edge water is strong, and the speed of the edge water advancing is relatively fast. (4) the gas reservoir in Shibei No. 2 gas field can be developed efficiently and the flooding rate can be reduced. The effective method is to effectively control the gas production rate of the development well in the trench zone, and to add new wells to perfect the well pattern at the high point of the micro-structure.
【作者單位】: 西南石油大學(xué)石油與天然氣工程學(xué)院;長江大學(xué);中國石油青海油田天然氣開發(fā)公司;
【基金】:國家重大專項(xiàng)“低滲、特低滲透油氣田經(jīng)濟(jì)開發(fā)關(guān)鍵技術(shù)”(編號(hào):2011ZX05013)資助
【分類號(hào)】:TE37
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