煤层气储层压裂现状及展望
发布时间：2018-07-22 16:48
【摘要】：为了深入研究煤层压裂,提高煤层压裂效果,总结分析了煤层压裂液、压裂支撑剂、压裂裂缝数值模拟、裂缝监测、煤层压裂设计及施工工艺的现状。通过对比分析得出,活性水与石英砂组合是浅层煤层气压裂的主要组合方式,但随着深度的增加,储层地质复杂性的增强,该组合压裂后的效果逐渐变差;传统的二维和拟三维裂缝模拟方法在煤层应用中具有局限性,需要根据煤储层地质特征对裂缝模拟方法进行优化;多种裂缝监测方法在煤层应用中的结果表明,煤储层压裂后主要呈现出贯穿煤层的垂直裂缝、垂直裂缝与水平裂缝组合的复杂裂缝和非对称网络裂缝3种形态。我国已探索出以活性水直井压裂为主,水力波及压裂和间接压裂等多种压裂工艺为辅的压裂工艺技术。最后对煤层压裂提出了展望,即在低成本和高效环保的前提下,从增加煤层改造体积和增大解吸面积的压裂机理出发,结合煤岩工程地质特征,优选压裂材料及配套压裂技术,为煤层气的合理高效开发提供理论指导。
[Abstract]:In order to deeply study coal seam fracturing and improve coal seam fracturing effect, the present situation of coal seam fracturing fluid, fracturing proppant, fracturing fracture numerical simulation, fracture monitoring, coal seam fracturing design and construction technology are summarized and analyzed. Through comparative analysis, it is concluded that the combination of active water and quartz sand is the main combination of shallow coalbed methane fracturing, but with the increase of depth and the increase of geological complexity of reservoir, the effect of this combination becomes worse gradually after fracturing. Traditional 2D and pseudo-3D fracture simulation methods have limitations in coal seam application, and need to optimize fracture simulation methods according to the geological characteristics of coal reservoir, and the results of various fracture monitoring methods in coal seam application show that, After the coal reservoir fracturing, there are three types of fracture: vertical fracture through coal seam, complex fracture and asymmetric network fracture combined with vertical fracture and horizontal fracture. In China, fracturing techniques, such as active water straight well fracturing, hydraulic wave fracturing and indirect fracturing, have been explored. Finally, the prospect of coal seam fracturing is put forward, that is, under the premise of low cost and high efficiency and environmental protection, according to the fracturing mechanism of increasing coal seam reconstruction volume and increasing desorption area, combining with the engineering geological characteristics of coal and rock, the fracturing materials and matching fracturing technology are optimized. It provides theoretical guidance for the rational and efficient development of coalbed methane.
【作者单位】： 莫斯科国立罗蒙诺索夫大学地质系;西南石油大学油气藏地质及开发工程国家重点实验室;陕西海荔石油机械有限公司;
【基金】：国家科技重大专项资助项目(2016ZX05044004-002)
【分类号】：TE377
本文编号：2138109
[Abstract]:In order to deeply study coal seam fracturing and improve coal seam fracturing effect, the present situation of coal seam fracturing fluid, fracturing proppant, fracturing fracture numerical simulation, fracture monitoring, coal seam fracturing design and construction technology are summarized and analyzed. Through comparative analysis, it is concluded that the combination of active water and quartz sand is the main combination of shallow coalbed methane fracturing, but with the increase of depth and the increase of geological complexity of reservoir, the effect of this combination becomes worse gradually after fracturing. Traditional 2D and pseudo-3D fracture simulation methods have limitations in coal seam application, and need to optimize fracture simulation methods according to the geological characteristics of coal reservoir, and the results of various fracture monitoring methods in coal seam application show that, After the coal reservoir fracturing, there are three types of fracture: vertical fracture through coal seam, complex fracture and asymmetric network fracture combined with vertical fracture and horizontal fracture. In China, fracturing techniques, such as active water straight well fracturing, hydraulic wave fracturing and indirect fracturing, have been explored. Finally, the prospect of coal seam fracturing is put forward, that is, under the premise of low cost and high efficiency and environmental protection, according to the fracturing mechanism of increasing coal seam reconstruction volume and increasing desorption area, combining with the engineering geological characteristics of coal and rock, the fracturing materials and matching fracturing technology are optimized. It provides theoretical guidance for the rational and efficient development of coalbed methane.
【作者单位】： 莫斯科国立罗蒙诺索夫大学地质系;西南石油大学油气藏地质及开发工程国家重点实验室;陕西海荔石油机械有限公司;
【基金】：国家科技重大专项资助项目(2016ZX05044004-002)
【分类号】：TE377
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