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在对低渗油气藏进行改造时,由于储层基质向裂缝的供气能力较差,单一的压裂主缝无论导流能力和缝隙多长,都难以实现预期的增产效果。缝网压裂技术具有低渗透、低孔隙度和不含天然裂缝储层的优点,可以利用储层两个方向水平主应力的差值与裂缝的延伸静压力之间的关系实现储层基质向人工裂缝供油气能力的提高,实现近井以及远井地带的缝网效果,实现预期的增产改造效果。本文结合实际的工作经验,对低渗透油气藏改造效果的缝网压裂技术的设计思路、应用条件和方式进行了分析,对其中的关键技术进行了简单的介绍,以供相关的工作人员参考。
In the process of reformation of low permeability reservoirs, it is difficult to achieve the expected stimulation effect due to the poor gas supply to the fracture from the reservoir matrix. The technology of seam network fracturing has the advantages of low permeability, low porosity and natural fractured reservoirs, and can make use of the relationship between the difference of the horizontal principal stress in the two directions of the reservoir and the extension static pressure of the fractures Artificial fractures for the improvement of oil and gas supply to achieve near-well and far-zone seam network effect, to achieve the expected effect of stimulation. Based on the actual work experiences, this paper analyzes the design ideas, application conditions and methods of seam fracturing technology with the effect of reformation of low permeability reservoirs, and gives a brief introduction of the key technologies therein for the reference of relevant staff .