页岩气勘探开发综述

A summary of the shale gas exploration and development

页岩气作为主要的非常规气藏之一,其勘探开发已成为全球资源开发的一个热点。页岩气储集层通常呈低孔、低渗透率,开采寿命长,生产周期长,采收率变化较大,且低于常规天然气采收率,这些特点决定了页岩气开发具有其独特的方式。水平井钻井因其自身的许多优点,已成为页岩气开发的最好钻井方式。由于页岩气井自然生产能力低,甚至没有自然生产能力,使得压裂技术在页岩气勘探开发中得到推广,并成为页岩气开采的主要方式之一。水力压裂、水平井分段压裂和同步压裂等技术,与裂缝检测技术相结合,使页岩气开采具有更大的发展潜力。

As one of the main unconventional gas reservoir, the exploration and development of shale gas has been a hot spot of global resources development. The Characteristics of the shale gas reservoir usually are low porosity, low permeability, long exploitation life and long production cycle, and its recovery efficiency changes very much and is lower compared with the conventional gas reservoir, these determine the shale gas exploitation has its unique way. Horizontal drilling has many advantages, so it has become the best drilling mode to explore the shale gas; because shale gas well has low natural capacity or even does not has the capacity at all, the fracturing technology has been developed in the exploration and development of shale gas and been a main mode of the shale gas development. The fracture technique includes hydraulic fracturing, horizontal well segment fracturing, synchronization fracturing and so on. The combination of the fracture technique and fracture detection has a great deal of potentiality in the shale gas development.