杏北纯油区典型区块水驱层系井网优化调整开发效果研究

发布时间：2018-05-22 19:53

本文选题：非主力层 + 层系调整　；参考：《东北石油大学》2016年硕士论文

【摘要】：杏北开发区历经40余年水驱开发,注采井网从基础井网调整到三次加密井网,部署方式从行列式布井逐渐转为五点法布井,注采井距由600m缩小至141m;开采对象由一类油层及有效厚度不小于2.0m的厚油层过渡到薄差油层,目前已进入特高含水期阶段,剩余油分布零散。在目前层系井网条件下,存在纵向上油层动用不均衡、平面上非主力层控制及动用程度偏低等开发矛盾,制约了水驱开发效果的进一步提高。为了充分挖掘剩余油潜力,必须根据油层开发特征进行层系的重新划分和注采井网的重新匹配,探索特高含水期改善水驱开发效果的有效途径。本文在详尽认识杏四区西部的地层结构和储层特点的基础上,借助Petrel地质建模软件建立储层三维地质模型,并利用油藏生产动态数据,对杏四区西部水驱开发阶段进行产液量、含水率拟合,拟合精度在3%以内,计算非主力层地质储量为2352.69万吨、采出程度为43.39%。通过分析非主力层目前和含水98%时纵向和平面剩余油分布情况,研究现井网适应性和加密调整潜力,制定层系井网优化调整方案,并从开发效果和经济效益进行优选。结果表明:方案3将非主力层分3套层系开采,含水率下降了3.08%,采收率提高了4.70%,净收益最大,为最优布井方案,即萨尔图好层200m行列加密井网、萨尔图差层141m五点法加密井网、葡I4组及以下油层180m五点法加密井网,这一结论为改善高含水阶段非主力层动用程度提供借鉴。
[Abstract]:After more than 40 years of water drive development in Xingbei Development Zone, the injection-production pattern was adjusted from the basic well pattern to the third infill well pattern, and the deployment mode gradually changed from the determinant well layout to the five-point well distribution. The interval between injection and production has been reduced from 600m to 141m, and the production object has been transferred from a class of reservoirs and thick reservoirs with effective thickness of not less than 2.0 m to thin and poor reservoirs. At present, they have entered the stage of extremely high water cut, and the remaining oil distribution is scattered. Under the condition of the present well pattern in the stratigraphic system, there are some development contradictions, such as the unbalanced production of the vertical oil layer, the low degree of production and the control of the non-main layer in the plane, which restrict the further improvement of the development effect of water drive. In order to fully exploit the potential of remaining oil, it is necessary to redivide the formation system and rematch the injection-production pattern according to the characteristics of reservoir development, and to explore an effective way to improve the development effect of water drive during the period of super high water cut. On the basis of a detailed understanding of the stratigraphic structure and reservoir characteristics in the west of Xing4 area, this paper establishes a three-dimensional geological model of the reservoir with the help of Petrel geological modeling software, and makes use of the reservoir production dynamic data to produce liquid during the development stage of water drive in the western part of Xing4 district. The fitting precision of water cut is less than 3%, the geological reserves of non-main layer is 23.5269 million tons and the degree of recovery is 43.39. By analyzing the distribution of vertical and plane remaining oil in the non-main layer and the water cut of 98, the adaptability of existing well pattern and the potentiality of infilling adjustment are studied, and the optimum adjustment scheme of the well pattern is formulated, and the optimum selection is made from the development effect and economic benefit. The results show that the water cut is reduced by 3.08, the recovery factor is increased by 4.70, and the net income is the largest, which is the best well layout scheme, that is, the well pattern of 200 m column in Saltuo and 141m five-point infill well pattern of Saltu difference layer. The results show that the water cut is reduced by 3.08, the recovery factor is increased by 4.70, and the net income is the largest. The result of 180m five-point infill well pattern of Pui _ 4 group and below provides a reference for improving the production degree of non-main reservoir in high water cut stage.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE341

【相似文献】