广利油田莱36断块井网完善综合调整方案研究

发布时间：2018-05-24 21:47

本文选题：井网完善 + 综合调整　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：广利油田位于东营凹陷中央隆起带东端,是一个受五条断层控制的构造油藏,主要断块自北向南依次为:莱27、莱38、莱36、莱1断块。莱36断块地面状况复杂,大部分区域被金湖银河、物流园、湿地等规划区包围。莱36断块位于广利油田中部,含油层位沙四段,油藏埋深2500m～2730m,含油面积4.0 km2,现井网采收率41.8%。目前莱36断块面临:采出程度不高,采油速度较低,注水井注水压力高,生产井产能不足等难题,严重影响了油田的高效开发。本文在深入分析莱36断块开发现状的基础上,运用油气藏开发理论和数值模拟等手段,对油藏地质特征、构造特征、储层特征、流体物性、剩余油分布等方面进行了研究。针对莱36断块低渗透断块油藏储层物性差,渗流阻力大,沉积相变化复杂,有效储层连通性和注水井对应关系差等特点,在逐层分析储层分布特征、剩余油分布特点的基础上,考虑现有井网分布,提出了以提高有效储层连通性,完善注采对应关系为目的的不规则井网调整方案,在具体调整井位的选择上,提出综合考虑钻遇有效厚度,含油饱和度以及注采对应关系的三考虑原则,最终优化出了同时满足技术指标和经济指标的合理注采井网。从而实现扩大流动区域,提高水驱控制程度的效果,为莱36断块综合调整、提高采收率提供科学依据。
[Abstract]:Located at the eastern end of the central uplift belt of Dongying depression, Guangli Oilfield is a structural reservoir controlled by five faults. The main fault blocks from north to south are: Lai 27, Lai 38, Lai 36 and Lai 1 fault blocks. The ground condition of Lai36 fault block is complex, most of the area is surrounded by Jinhu Galaxy, Logistics Park, Wetland and so on. The Lai36 fault block is located in the middle of Guangli Oilfield, with oil bearing formation sand 4, reservoir buried depth 2500mN 2730m, oil bearing area 4.0 km 2, well pattern recovery 41.8%. At present, Lai36 fault block is faced with the following problems: low recovery degree, low oil recovery rate, high injection pressure in water injection wells and insufficient productivity of production wells, which seriously affect the efficient development of oil fields. Based on the analysis of the present development situation of Lai36 fault block, the geological characteristics, structural characteristics, reservoir characteristics, fluid physical properties and remaining oil distribution of the reservoir are studied by means of reservoir development theory and numerical simulation. In view of the characteristics of poor reservoir physical property, large seepage resistance, complex sedimentary facies change and poor relationship between effective reservoir connectivity and water injection wells in low permeability fault block reservoir of Lai36 block, the distribution characteristics of reservoir and remaining oil are analyzed layer by layer. Considering the distribution of existing well pattern, an adjustment scheme of irregular well pattern is put forward to improve effective reservoir connectivity and improve the corresponding relationship between injection and production. In the selection of specific adjustment well location, it is proposed that the effective thickness of drilling should be considered synthetically. Based on the three considerations of oil saturation and the corresponding relation between injection and production, the rational injection-production pattern satisfying both technical and economic indexes has been optimized. Thus, the effect of expanding the flow area and improving the control degree of water flooding can be realized, which can provide scientific basis for comprehensive adjustment of Lai36 fault block and improvement of oil recovery.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE324

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