东仁沟注水示范区综合治理方案

发布时间：2018-11-18 15:57

【摘要】：定边采油厂东仁沟油区C1-C3、C4+5、C6-C8共5个油层具有薄单层、低孔隙度、低渗透率、低油层压力和层内、层间非均质性强等特点,很长时间主要应用裸眼完井,依靠天然能量进行采油,压力下降较快,油区天然能量亏空比较严重,总体产油量较低,油藏开发效果较差。为了油藏的高效开发,研究区进行了整体注水开发,但产量变化不大,含水率上升较快,所以对研究区注水动态与高效开发技术急需进行深入分析研究。本文首先对研究区储层特征与地质特征进行分析研究;其次,通过已有井的动态资料研究单井产能、含水率变化及其油井产量的递减规律,并对注采、井网系统分析研究;再次,对研究区内的注水情况进行分析,对注水见效、注水利用的状况分析研究;计算研究区水驱储量的动用程度,结合实际情况对研究区最终的采收率分析预测;确定研究区合理的注水量、开采速度和注采比;综合评价了目前的注水开发效果。通过这些研究,认为研究区属河流相,孔隙类型为中孔-细喉型和中、小孔-微细喉型且非均质性较强;通过分析形成一套适合油田地层和开发特点的开发调整技术,使油田采出程度得到增加。
[Abstract]:In the Dongrengou oil area of Dingbian Oil production Plant, five reservoirs, C1-C _ 3N _ 4 _ 4 _ 5 and C _ 6-C _ 8, have the characteristics of thin monolayer, low porosity, low permeability, low reservoir pressure and strong heterogeneity between layers, etc. For a long time, they are mainly used in open-hole completion. Depending on the natural energy for oil production, the pressure decreases rapidly, the natural energy deficit in oil area is serious, the total oil production is low, and the reservoir development effect is poor. In order to develop the reservoir efficiently, the whole water injection development was carried out in the study area, but the production changed little and the water cut increased rapidly. Therefore, it is urgent to analyze the water injection performance and the high efficiency development technology in the study area. In this paper, the reservoir characteristics and geological characteristics in the study area are analyzed and studied firstly, secondly, the single well productivity, the change of water cut and the decline rule of oil well production are studied through the dynamic data of existing wells, and the system of injection-production and well pattern is analyzed and studied. Thirdly, the situation of water injection in the study area is analyzed, the effect of water injection and the condition of water injection utilization are analyzed and studied, the production degree of water drive reserves is calculated, and the final oil recovery in the study area is analyzed and forecasted in combination with the actual situation. The reasonable water injection rate, production speed and injection-production ratio in the study area are determined, and the current water injection development effect is comprehensively evaluated. Through these studies, it is considered that the study area belongs to fluvial facies, pore type is mesoporous-fine throat type and medium pore-micro-fine throat type and heterogeneity is strong; By analyzing and forming a set of development and adjustment technology suitable for the formation and development characteristics of oil field, the recovery degree of oil field is increased.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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