摘要
通过采用扫描电镜、成像测井等分析方法分析了PS区块微裂缝的发育对泥页岩储集性能的影响。研究结果表明PS区块优质页岩段发育的微裂隙主要有高导缝、诱导缝和高阻缝。高导缝的存在对于页岩气含量是把双刃剑,高导缝发育有利于提高页岩气的储集空间,增加游离气含量,但裂缝规模较大,页岩气容易散失;而诱导缝与闭合缝通过后期压裂改造有助于气体产出。三种缝的存在说明PS区块具有较好的开发潜力。
The influences of the development of micro-fissure in PS block on the reservoir performance were analyzed by scanning electron microscope, imaging logging and so on. The results show that the main micro-fissure developed in high grade shale of PS block are highly conductive fissure, induced fissure and high resistance fissure. For the shale gas content, the existence of high grade shale is a double-edged sword. The developed high grade fissure is conducive to enlarging the reservoir space of the shale and increasing free gas content. However, the fissure scale is comparatively large which leads to the easily lost of shale gas. Moreover, by the fracturing of induced fissure and closed fissure in the late period, shale gas is easy to product. The existence of these three fissures proved that the PS block has great development potential.
出处
《油气藏评价与开发》
CSCD
2015年第1期21-25,共5页
Petroleum Reservoir Evaluation and Development
关键词
龙马溪组
页岩气
裂缝发育
储集能力
PS区块
Longmaxi formation
shale gas
developed fissure
reservoir performance
PS block
