姚店北区贾409-贾256井区开发调整技术对策研究

发布时间：2018-12-13 05:53

【摘要】：姚店北区贾409-贾256井区面积7.1km2,油水井300口,以长6为主力产层,目前主要的问题有:单井产能低(平均日产油196kg/d)、水淹/水窜现象严重(71口曾发生水淹水窜),以及部分水井注水困难。直面这些问题,本次研究从小层划分对比(划分了4个油层段11个小层)开始,进行了长6低渗储层基质特征研究;构造、沉积相、储层建筑结构及非均质特征研究;天然裂缝、微裂缝及人工裂缝特征研究。在大量动态资料统计基础上摸清了油田开发状况,进行了油田主要注采矛盾分析及再辨析,弄清了研究区单井产能低、水淹/水窜现象严重,以及水井注水困难等开发矛盾机理所在,并绘制了注采矛盾平面分布图。为了进一步深化认识,进行了油水运动规律研究,计算了剩余油分布图。通过以上综合研究,本文有针对性地提出了开发调整技术对策,包括井网、开发层位、注水制度、措施类型优选(例选了具体单井及层位)等多方面的调整,以及其它一些调整如调驱调剖、堵水、改变岩石润湿性等。甚至提出了非常规调整对策试验,即在研究区开辟小块区域,进行(缝网+暂堵段塞)压裂+开发后期润湿反转吞吐开采试验。
[Abstract]:The area of Jia409-Jia 256 well area in Yadian North District is 7.1 km2, with 300 oil and water wells, with Chang 6 as the main production zone. At present, the main problems are: low productivity of single well (average daily oil production 196kg/d), The phenomenon of water-flooding / water-channeling is serious (71 wells have occurred water-flooded channeling) and some wells are difficult to inject water. At the beginning of this study, the matrix characteristics of Chang 6 low permeability reservoir, structure, sedimentary facies, reservoir architecture and heterogeneity were studied. Study on the characteristics of natural cracks, microcracks and artificial fractures. Based on the statistics of a large number of dynamic data, the present situation of oilfield development is found out, and the contradiction analysis and discrimination of the main injection and production in the oilfield are carried out. It is clear that the single well productivity is low and the phenomenon of water flooding / water channeling is serious in the study area. And the development contradiction mechanism of water injection is difficult, and the plane distribution map of injection-production contradiction is drawn. In order to deepen the understanding, the oil and water movement law was studied, and the remaining oil distribution map was calculated. Based on the above comprehensive research, this paper puts forward the technical countermeasures of development adjustment, including well pattern, development horizon, water injection system, optimal selection of measure types (such as selecting specific single well and horizon), and so on. And other adjustments such as profile control, water shutoff, change rock wettability and so on. Even the unconventional adjustment countermeasure test is put forward, that is, to open up a small area in the study area, and to carry out wetting inversion huff and puff production test in the later stage of fracturing development.
【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】：TE34

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