方正油田方4区块开发技术研究

发布时间：2018-09-03 07:22

【摘要】：方正油田方4区块位于黑龙江省通河县,方4区块乌一段油藏的形成主要受构造条件控制,具有一定的构造幅度,同时早期或继承性发育的断裂对油气具有一定的侧向封堵性,油藏上油下水,具有统一的油水界面,是典型的受构造控制的断块油藏。地质研究发现,方正断陷整体表现为两凹一凸两斜坡的构造格局,可以划分为南部斜坡带、东部凹陷带、西部凹陷带、北部凸起带和西部斜坡带五个二级构造单元。岩性上以含砾砂岩、细砂岩、暗色泥岩和煤层为主。对层内韵律性、岩心资料分析、孔隙度、渗透率剖面分布、砂体几何形态和连续性、孔隙度、渗透率平面分布特征等参数研究发现,储层具有纵向和横向的非均质性。从地面原油性质看,该区原油油质较轻,具有低密度、低粘度、低凝固点、含蜡量中等的特点,属于挥发性油藏。本文根据方4区块特低渗透,导压能力低等特点,确定采用人工补充地层能量的方式开采。结合长春油田等相似油田的生产经验,分别对注气开发和注水开发方式进行了可行性评价,确定本区块的开发方式。并针对开发方案、井网设计、工作制度选取、井位部署等进行了优选,同时对开发指标进行预测及对开发方案进行了经济评价。
[Abstract]:Fang4 block in Fangzheng Oilfield is located in Tonghe County, Heilongjiang Province. The formation of Wuyi member reservoir in Fang4 Block is mainly controlled by structural conditions and has a certain tectonic range. At the same time, the early or inherited faults have certain lateral plugging to oil and gas. It is a typical fault block reservoir controlled by structure with uniform oil-water interface. Geological study shows that the Fangzheng fault depression is characterized by two concave and two convex slopes, which can be divided into five secondary structural units: the southern slope zone, the eastern depression zone, the western sag zone, the northern uplift zone and the western slope belt. Lithology to gravel sandstone, fine sandstone, dark mudstone and coal seams. It is found that the reservoir has vertical and horizontal heterogeneity by studying the rhythmicity, core data analysis, porosity, permeability profile distribution, sand body geometry and continuity, porosity, permeability plane distribution characteristics and so on. The crude oil in this area is characterized by low density, low viscosity, low freezing point and medium wax content, so it is a volatile reservoir. According to the characteristics of very low permeability and low pressure conductivity in Fang4 Block, the method of artificial supplementary formation energy is determined in this paper. Based on the production experience of similar oilfields such as Changchun Oilfield, the feasibility evaluation of gas injection development and water injection development is carried out, and the development mode of this block is determined. The development plan, well pattern design, work system selection, well location arrangement and so on are selected, and the development index is forecasted and the economic evaluation of the development plan is made at the same time.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE347

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