哈得逊油田水平井含水率上升模式研究

发布时间：2018-05-28 19:57

本文选题：哈得逊油田 + 边底水油藏　；参考：《成都理工大学》2015年硕士论文

【摘要】：哈得逊油田东河砂岩油藏是边底水油藏。利用水平井开发时,因为较充足的天然能量,造成哈得逊油藏油水两相区内的水平井容易产生底水锥进,使油水界面变形呈锥形状上升。而在纯油区边部的水平井由于边水的入侵使得含水率也快速的上升,这样整体上导致边底水油藏的开发见水时间短。边底水油藏的含水上升过快,在低油价的今天必然影响油田生产的经济效益。本文针对哈得逊东河砂岩油藏水平井开发的特点,着重从以下几个方面研究了哈得逊油田东河砂岩油藏的含水上升模式:对哈得逊东河砂岩油藏的水平井含水上升类型进行归类,总结了哈得逊油田水平井的含水上升模式。在此基础上研究了各模式的含水上升率,并预测了各模式的可采储量。最后对各模式的含水上升机理进行研究,并针对各模式的特点提出了相应的控水措施。通过对哈得逊东河砂岩油藏95口水平井的生产资料分析,将这95口井划分为有无水采油期的井和开井见水的井两大类,在此基础上采用含水率为纵坐标、累积产油为横坐标的曲线来分析含水的变化。总结了哈得逊东河砂岩油藏的水平井的含水上升模式并分为6种模式。模式1:有无水采油期缓慢上升型;模式2:有无水采油期快速上升型;模式3:有无水采油期含水波动型;模式4:开井见水缓慢上升型;模式5:开井见水快速上升型;模式6:开井见水含水波动型。对哈得逊东河砂岩油藏6种水平井含水上升模式的含水上升率进行了研究,研究结果表明,目前哈得逊东河砂岩油藏中模式3和模式5的开发效果好;模式1、模式6的开发效果较好;模式2和模式4的开发效果一般。利用甲型水驱曲线、乙型水驱曲线、丙型水驱曲线、丁型水驱曲线4种水驱曲线对6种含水模式的可采储量进行预测,模式1的可采储量明显高于其他5类模式的可采储量,结合模式1的开发效果一般,所以进行可以考虑对模式1的水平井优先进行调整。建立4种模式典型井的概念模型,通过数值模拟研究避水高度、夹层、日产液量以及油水粘度比等对含水上升的影响。通过研究发现:模式1的主要影响因素是避水高度、夹层、日产液量以及油水粘度比;模式2的主要影响因素为日产液量和油水粘度比;模式4的主要影响因素为:避水高度、夹层、日产液量;模式5主要的影响因素为:夹层、日产液量以及油水粘度比。针对4种模式提出了相应的控水措施,模式1的主要控水措施为:(1)充分利用已有隔夹层计算临界产量,并在临界产量以下生产;(2)避免对该模式井的酸化。模式2的主要控水措施为:(1)采取补孔、堵水的措施;(2)纯油区新设计水平井时应先考虑水平井的位置,然后考虑其他因素的影响。模式4的主要措施为:(1)在开发过程中要防止模式4向模式5转变,主要方法是转注以及部分井补孔等措施;(2)模式4中也存在钙质夹层,与模式1一样不能采用酸化压裂的措施。模式5的主要措施是:(1)达到经济极限含水的井进行关井;(2)远离油水两相区的水平井注入人工隔夹层。
[Abstract]:The Donghe sandstone reservoir in the Hudson oilfield is an edge and bottom water reservoir. With the exploitation of the horizontal well, the horizontal well in the oil and water two phase area of Hudson reservoir is prone to produce bottom water coning in the exploitation of horizontal well, and the deformation of the oil and water interface rises in cone shape, and the water content is fast in horizontal well at the edge of the pure oil area. As a whole, the development of the edge and bottom water reservoir is short of water time. The water cut in the bottom water reservoir rises too fast, and the low oil price will affect the economic benefit of the oilfield production today. In this paper, the Donghe sandstone reservoir in Hudson oil reservoir is studied in the following aspects. The rising pattern of water cut in the reservoir: classifying the rising type of water cut in the horizontal well of Hudson Donghe sandstone reservoir, summarizing the water cut rising mode of the Hudson oil field horizontal well. On this basis, the water cut rise rate of each model is studied and the recoverable reserves of each model are predicted. The water cut mechanism of each model is studied at the last. According to the characteristics of each model, the corresponding water control measures are put forward. Through the analysis of the production data of 95 horizontal wells in the sandsson Donghe sandstone reservoir, the 95 wells are divided into two kinds of wells with no water recovery period and open well and water well. On this basis, water content is used as the longitudinal coordinate and the cumulative oil production is the horizontal coordinate curve to analyze water cut. The changes in the water cut model of the horizontal wells in the Hudson Donghe sandstone reservoir are divided into 6 models. Model 1: has a slow rise in the period of anhydrous oil recovery; mode 2: has a fast rising type in the period of anhydrous oil recovery; model 3: has water wave type in the period of anhydrous oil recovery; mode 4: open well see slow and slow rising type of water; mode 5: open well see rapid rising type of water; Model 6: open well shows water bearing wave type. The water cut rise rate of water cut model of 6 horizontal wells in Hudson Donghe sandstone reservoir is studied. The results show that the development effect of mode 3 and mode 5 in Hudson Donghe sandstone reservoir is good at present; model 1, model 6 development effect is better, mode 2 and model 4 have general development effect. The recoverable reserves of 6 water cut modes are predicted by 4 water flooding curves of type a water drive curve, type B water drive curve, C water drive curve, and type water flooding curve, and the recoverable reserves of mode 1 are obviously higher than other 5 types of model, and the development effect of model 1 is general, so the horizontal well of model 1 can be considered as priority. The concept model of 4 typical models is set up to study the effect of water height, interlayer, daily liquid volume and viscosity ratio of oil and water on water cut rise by numerical simulation. Through the study, it is found that the main influencing factors of model 1 are water height, interlayer, daily liquid quantity and oil water viscosity ratio, and the main influencing factors of model 2 are day The main influencing factors of mode 4 are water avoiding height, interlayer and daily liquid quantity, and the main influencing factors of mode 5 are the interlayer, the daily liquid quantity and the oil and water viscosity ratio. The corresponding water control measures are put forward for the 4 modes, and the main water control measures of mode 1 are as follows: (1) the critical production of the existing intercalated intercalation is fully utilized, and Production below the critical output; (2) avoid acidification of the model well. The main water control measures of model 2 are: (1) take holes and water plugging measures; (2) the position of horizontal wells should be considered first in the newly designed horizontal wells in pure oil area, and the influence of other factors should be considered. The main measures of mode 4 are: (1) prevent mode 4 to mode 5 during the development process. Transformation, the main method is the transfer and part of hole filling and other measures; (2) there is also calcareous interlayer in mode 4, which can not be acidified with mode 1. The main measures of mode 5 are: (1) reach the well with the economic limit water cut; (2) the horizontal wells far away from the oil-water two phase area into the artificial interlayer.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE343

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