鄂尔多斯盆地陆相页岩气压裂技术现状

Fracturing Technology Status of Continental Shale Gas Reservior in Ordos Basin

鄂尔多斯盆地三叠系延长组陆相油页岩是延长组页岩气的生、储层位。延长陆相页岩具有埋藏深度浅、分布稳定,厚度较大,孔隙度、基质渗透率极低,岩性脆等特点。延长油田结合自身陆相页岩气储层的特点,通过对页岩气储层改造方式、增产机理、区域层位选择等论证优化后,经过三年多时间的室内实验研究及现场试验,优化出了适合陆相页岩储层的压裂液体系,并首次将CO2压裂工艺技术应用于陆相页岩气压裂,逐步形成了一套适合延长组陆相页岩气储层压裂改造工艺技术,并在延长油田多口页岩气井现场应用,取得了陆相页岩气储层改造的技术突破。

Erdos Basin Triassic Yanchang Formation oil shale is the group of raw shale gas reservoir bit. Yanchang continental shale oil have same features as shallow depth of burial, stable distribution, greater thickness, low porosi- ty and matrix permeability, lithology brittle characteristics. Yanchang oilfield combines their continental shale gas reservoir characteristics, studies the shale gas reservoir reconstruction methods, production mechanism, regional hori- zon optimal choice argument, and after more than three years of research and field testing laboratory experiments, it has optimized out of fracturing fluid system suitable for the continental shale reservoirs, and the first CO2 fracturing technology applied to continental shale gas fracturing, and gradually forms a set of terrestrial shale gas reservoir fracturing technology and extends the field of multi - port shale gas field applications, so it has made continental shale gas reservoirs in the transformation of technological breakthroughs.