公开(公告)号：US20160108308A1

公开(公告)日：2016-04-21

申请号：US14974700

申请日：2015-12-18

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Trevor Hughes ,  Evgeny Barmatov ,  Jill Geddes ,  Michael Fuller ,  Bruno Drochon ,  Sergey Makarychev-Mikhailov

IPC: C09K8/80 ,  E21B43/267

CPC classification number: C09K8/805 ,  C09K8/665 ,  C09K8/70 ,  C09K2208/28 ,  E21B43/267

Abstract: A wellbore fluid comprises an aqueous carrier liquid, hydrophobic particulate material suspended therein and a gas to wet the surface of the particles and bind them together as agglomerates. The hydrophobic particulate material has a specified maximum particle size and/or minimum surface area: namely a volume median particle size d50 of not more than 200 micron, determined as median diameter of spheres of equivalent volume and/or a surface area of at least 30 m2 per litre (0.03 m2 per milliliter), determined as surface area of smooth spheres of equivalent volume.The agglomeration of the particles by gas leads to the formation of agglomerates which contain gas and so have a bulk density lower than the density of the particles. This reduces the rate of settling. The fluid is particularly envisaged as a slickwater fracturing fluid in which the suspended particles are proppant. We have found that the small particle size and/or substantial surface area increases the amount of gas which can be retained within agglomerates and so enhances the buoyancy of the agglomerates. The end result is that a greater proportion of a hydraulic fracture is propped open.

Abstract translation: 井眼流体包括水性载体液体，悬浮在其中的疏水性颗粒材料和用于润湿颗粒表面的气体并将其作为附聚物结合在一起。 疏水性颗粒材料具有规定的最大粒径和/或最小表面积：即体积中值粒径d50不大于200微米，确定为等体积的球体的中值直径和/或至少30的表面积 m2 /升（0.03平方米/毫升），确定为相当体积平滑球面的表面积。 通过气体的颗粒附聚导致形成含有气体的聚集体，因此其密度低于颗粒的密度。 这降低了沉降的速度。 流体特别设想为浮水压裂液，其中悬浮颗粒是支撑剂。 我们已经发现，小的颗粒尺寸和/或实质的表面积增加了可以在附聚物中保留的气体的量，并且因此增强了附聚物的浮力。 最终的结果是水力裂缝的比例较大。