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近年来,油田开发越来越成熟,技术越来越精湛,但是剩余区块的油藏品味也越来越差,所以开发难度也越来越大,对注水要求越来越高,而且已成的井网可能造成水淹或者水线不均匀导致的注水未受效油井存在,而使地层压力难以恢复,采收率较低,产量难以突破等问题,需要及时调整的注采井网,恢复地层压力,提高采收率。非常规油气藏-致密油的水平井开发,需要合理的井网部署,才能将采出程度最大,投资最小化。本文以定边油田为例,评价了该低渗透油田井网适应性,提出了“新七点法”水平井注水开发的理念。符合实际、合理的井网选择将决定整个开发区域的采收率及其开采价值。
In recent years, oilfield development is more and more mature, technology is more and more exquisite, but the remaining blocks of the reservoir taste is getting worse, so the development of more and more difficult, higher and higher water injection requirements, and has become Of the well pattern may cause water flooding or uneven waterline to affect the existence of unffected oil wells, making formation pressure difficult to recover, low recovery rate, yield is difficult to break and other issues that require timely adjustment of injection well pattern, recovery Formation pressure increases oil recovery. Unconventional oil and gas reservoirs - the development of tight oil-rich horizontal wells, require a reasonable pattern of well patterns to maximize recovery and minimize investment. Taking Dingbian oilfield as an example, this paper evaluates the wellbore adaptability of the low permeability oilfield and puts forward the concept of “new seven point method” horizontal well waterflooding. In line with the actual, reasonable choice of well pattern will determine the recovery of the entire development zone and its exploitation value.