强底水白云岩油藏注氮气非混相驱数值模拟

Numerical simulation of immiscible nitrogen flooding for dolomite reservoirs with strong bottom water

曹鹏 2 朱永峰³ 戴传瑞 2 崔仕提³ 闫晓芳 2

中国石油杭州地质研究院，浙江 杭州 310023 中国石油集团碳酸盐岩储层重点实验室，浙江 杭州310023 中国石油塔里木油田分公司勘探开发研究院，新疆 库尔勒 841000

Hangzhou Research Institute of Geology, PetroChina, Hangzhou 310023, China Key Laboratory of Carbonate Reservoirs, CNPC, Hangzhou 310023, China Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla 841000, China

英买321油藏是塔里木盆地唯一进入开发阶段的白云岩油藏。该油藏水体能量强，开发井以水平井为主，油井进入高含水期后，找水、堵水措施实施困难，开发效果逐渐变差，大量剩余油富集在构造高部位，天然水体无法波及。为有效动用该类剩余油，开展了油藏工程和数值模拟研究。研究结果表明，在强底水条件下，可以采用注氮气非混相驱的方式动用这部分剩余油，水平井和直井注气吞吐10轮次，采出程度分别可提高3.30~4.10百分点和3.30~3.60百分点，增产效果显著。

The YM321 reservoir has been into the development stage in Tarim Basin, and the reservoir rock is mainly dolomite. This reservoir has strong aquifer energy, and there are many horizontal wells with high water cut, which have the problem of finding water producer and plugging problem, and the development effect gradually become worse. Plentiful of oil that water flooding cann′t sweep remains in the high structure. This paper mainly researches the remained oil through reservoir engineering method and reservoir numerical simulation technique. Research demonstrates that the remained oil can be displaced by injecting nitrogen under strong aquifer energy. The recovery can be increased about 3.30%-4.10% and 3.30%-3.60% by ten cycles of injection nitrogen puff and puff for horizontal wells and vertical wells respectively. The effect is quite remarkable.

10.6056/dkyqt201602015