涠洲6-12油田复杂断块油藏生产层位优化研究

发布时间：2018-05-06 09:38

本文选题：复杂断块油藏 + 生产层位　；参考：《西南石油大学》2015年硕士论文

【摘要】：复杂断块油藏在我国范围内分布非常广泛,其储量和产量在我国占有相当大的比例。本文以涠洲6-12油田为例,该油田位于南海北部海域北部湾盆地,是典型的复杂断块油藏,具有明显的复杂断块油藏地质特征。本文在大量国内外文献调研的基础上,针对涠洲6-12油田在开发过程中油井产量递减较快、生产层位之间相互干扰、油藏采油速度过大、地层压力下降快及低部位井出水等问题,结合涠洲6-12油田地质和开发动态特征,主要开展以下几方面的工作,并取得了相应的研究成果： (1)对涠洲6-12油田复杂断块油藏的构造特征、沉积特征、储层物性及流体特征等进行了分析与总结,研究其油藏类型并对其储层天然能量进行了评价。 (2)分析了油藏开发现状,分别对A1/A2/A4/A6/A3S1/A7井进行了产能分析,通过研究目标区块未达到配产的原因,找出了其产量递减的规律。针对生产过程中的某些生产层位气油比较高等问题,通过单井动态分析方法,分析部分生产油组是否存在气顶。 (3)由于油藏大多属于边水油藏,在开发过程中,应主要考虑油井水体的影响,并控制其采油速度,防止水推进过快。明确了不同区域流体的分布,建立了流体空间分布模型。 (4)在多层合采过程中可能存在层间干扰,使得油组开发程度不均。针对这一问题,通过数值模拟方法对油井生产层位组合、单井工作制度以及补充能量方式进行模拟研究,对其生产优化论证结果进行方案比选,得到较优的推荐方案,并预测开发指标。
[Abstract]:Complex fault block reservoirs are widely distributed in China, and their reserves and production occupy a large proportion in China. This paper takes Weizhou 6-12 oilfield as an example, which is a typical complex fault block reservoir located in the Beibu Bay basin in the northern South China Sea, and has obvious geological characteristics of complex fault block reservoir. Based on a large number of domestic and foreign literatures, this paper aims at the problems of rapid decline of oil well production, mutual interference between production layers, excessive oil recovery rate, rapid drop of formation pressure and low position well water in Weizhou 6-12 oilfield. Combined with the geological and development characteristics of Weizhou 6-12 oilfield, the following aspects are mainly carried out, and the corresponding research results are obtained. 1) the structural characteristics, sedimentary characteristics, reservoir physical properties and fluid characteristics of complex fault-block reservoirs in Weizhou 6-12 oilfield are analyzed and summarized. The reservoir types are studied and the natural energy of reservoirs is evaluated. 2) the present situation of reservoir development is analyzed, and productivity analysis of A1/A2/A4/A6/A3S1/A7 well is carried out, and the law of production decline is found by studying the reason why the target block has not reached the distribution of production. In view of the problems of high gas and oil in some production layers during production, this paper analyzes whether gas cap exists in some oil production groups by the method of single well dynamic analysis. 3) because most of the reservoirs belong to edge water reservoirs, in the process of development, we should mainly consider the influence of oil well water body, and control the oil recovery speed to prevent the water from pushing too fast. The distribution of fluid in different regions is clarified, and the spatial distribution model of fluid is established. 4) interlayer interference may exist in the process of multilayer combined production, which makes the development degree of oil group uneven. In order to solve this problem, the production horizon combination, single well working system and supplementary energy mode of oil well are simulated by numerical simulation method, and the results of production optimization demonstration are compared and selected, and a better recommended scheme is obtained. And forecast the development index.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE347

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