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水平油田位于埕东凸起东北坡,是一个地层不整合油藏。它油层薄、倾角大、含油高度低,在平面上呈窄条带状分布。直井勘探、开发风险性极大。利用水平井的切顶穿越技术,把“黄金轨迹”设计在不整合面下垂直于储层走向,达到最大限度地发现油层,最大限度地降低勘探风险;把“黄金轨迹”设计在不整合面下平行于储层走向,最大限度地提高单井产量,提高油层采收率。在水平油田先后设计出水平预探井、水平评价井、多底多功能水平井、水平巷道井五口四种类型的水平井,实现了埕东凸起东北坡不整合油藏的整体解剖;井总结出一套不整合油藏水平井井位设计及其在钻井中的应用方法,取得了明显的经济效益和社会效益。
The horizontal oil field is located on the northeast slope of Jiu-Dong uplift and is an unconformity reservoir. It is thin, dip angle, low oil height, narrow strip distribution in the plane. Straight well exploration, development of great risk. By using horizontal well crosscutting technology, the design of “golden track” is perpendicular to reservoir direction under unconformity to find out the reservoir to the maximum extent and minimize the risk of exploration. The design of “golden track” in unconformity Parallel to the direction of the reservoir to maximize single-well production and improve oil recovery. In the horizontal oilfield, four types of horizontal wells including horizontal pre-exploration well, horizontal evaluation well, multi-bottom multi-purpose horizontal well and horizontal wellhead have been designed to realize the overall anatomy of unconformity reservoirs on the northeast slope of the East Junggar Uplift; well Summed up a set of unconformity reservoir horizontal well location design and its application in drilling, has made obvious economic and social benefits.