克拉玛依油田红山嘴砾岩油藏开采方式探讨

Discussion on Production Methods for Hongshanzui Conglomerate Reservoir

红山嘴油田属克拉玛依Ⅱ类砾岩油藏,已有20多年的注水开发历史,虽然采出程度较低,但综合含水率较高,注采矛盾十分突出。针对该油田主力区红48断块克下组油藏,在室内和矿场试验的基础上,利用数值模拟手段,对该油藏后期水驱、聚合物驱和深部调驱等技术进行了研究。结果表明:目前条件下,水驱开发油藏最终采收率可以达到标定采收率;聚合物驱能够实现稳油控水和提高油藏最终采收率,但措施成本高和需要改善配液水质;深部调驱技术虽然在提高采收率方面略次于聚合物驱开发,但能较好地克服聚合物驱所面临的问题。综合分析认为,深部调驱技术是目前条件下改善该油藏开发效果较好的开采方式。

Hongshanzui oilfield has more than 20-year history of water-injection development. Although the recovery percent of reserves is relatively low at present, the overall water-cut of this oilfield is high, and the injection-production conflict is very serious. To obtain better development effect, studies on technologies such as water drive at late stage, polymer flooding and deep profile control and oil displacement have been carried out using numerical simulation technology for Lower Karamay reservoir in faulted block Hong-48, which is the key reservoir of the oihqeld. The results show that under the current conditions the ultimate recovery by water drive can reach the calibrated recovery; the stable oil production by water-cut control and the improved ultimate recovery can be realized through polymer flooding, but the operational cost for this technology is relatively high and the water quality should be improved. The recovery by deep profile control and oil displacement is less than that by polymer flooding, but this technology can be used to better solve the problems that happened daring polymer flooding process. It is concluded that deep profile control and oil displacement technology is the best production method for improving the development effect under the current conditions.