公开(公告)号：US20130168096A1

公开(公告)日：2013-07-04

申请号：US13717411

申请日：2012-12-17

申请人： Schlumberger Technology Corporation

发明人： Sergey Dmitrievich Parkhonyuk ,  Philippe Enkababian ,  Bernhard Lungwitz

IPC分类号： C09K8/62 ,  E21B43/16

CPC分类号： C09K8/62 ,  C09K8/665 ,  C09K8/68 ,  C09K8/70 ,  C09K2208/08 ,  C09K2208/30 ,  E21B43/16 ,  E21B43/26

摘要： The composition includes a pH adjusting agent and a precipitation-control agent. The pH adjusting agent provides the hydrolysis of degradable fibers at a temperature of no more than 50° C. and comprises substances that may provide and maintain a high pH environment. The precipitation-control agent allows maximally delaying or completely suppressing the formation and deposition of precipitate during the hydrolysis of the degradable components in the treatment fluid A method of treating an subterranean formations penetrated by a wellbore with the additives described herein comprises providing a treatment fluid comprising a base mixture and a degradable substance, with additionally added degradable materials, and injecting the prepared treatment fluid into the subterranean formation.

摘要翻译： 该组合物包括pH调节剂和沉淀控制剂。 pH调节剂在不超过50℃的温度下提供可降解纤维的水解，并且包括可提供并保持高pH环境的物质。 沉淀控制剂允许最大限度地延迟或完全抑制处理流体中可降解组分水解期间沉淀物的形成和沉积。用本文所述的添加剂处理由井眼渗透的地下地层的方法包括提供处理流体，其包括 基础混合物和可降解物质，另外添加可降解材料，并将制备的处理流体注入地层中。

公开(公告)号：US11091994B2

公开(公告)日：2021-08-17

申请号：US16483566

申请日：2017-02-08

申请人： SCHLUMBERGER TECHNOLOGY CORPORATION

发明人： Sergey Dmitrievich Parkhonyuk ,  Evgeny Pavlovich Korelskiy ,  Kreso Kurt Butula ,  Andrey Sergeevich Konchenko ,  Valeriy Anatolievich Pavlov

IPC分类号： E21B43/267 ,  E21B33/134 ,  E21B41/00 ,  E21B49/00 ,  E21B47/06

摘要： A horizontal well may be refractured or reactivated by generating a geomechanical model to estimate the stress level in the formation; identifying zones with high, medium, and low stress levels in the formation; isolating existing fractures in the horizontal well; injecting a fracturing fluid into the well to create at least one new fracture in a zone with a low stress level and packing the created fracture with proppant to increase the stress level in the zone; isolating the at least one newly created fracture; initiating refracturing in the zone with the high and/or medium stress level; identifying a location of the refracturing crack in the zone with the high and/or medium stress level; and developing the refracturing crack and packing it with proppant.

公开(公告)号：US11168555B2

公开(公告)日：2021-11-09

申请号：US16620597

申请日：2017-06-09

申请人： SCHLUMBERGER TECHNOLOGY CORPORATION

发明人： Elena Vladimirovna Danilevich ,  Sergey Dmitrievich Parkhonyuk ,  Nikita Yurievich Silko

IPC分类号： E21B33/13 ,  E21B43/26 ,  C09K8/44 ,  C09K8/467 ,  C09K8/504 ,  C09K8/508 ,  C09K8/514 ,  C09K8/516 ,  C09K8/68 ,  C09K8/70 ,  E21B33/14

摘要： A method for temporary isolation of a well interval is proposed, the method comprising: pumping a first slurry into the well, the slurry comprising a viscous carrier fluid, degradable particulates, and degradable fibers, until a first filter cake is formed; and pumping a second slurry into the well, the slurry comprising a viscous carrier fluid, non-degradable particulates, and degradable fibers, until a second filter cake is formed. The first and the second slurries are not mixed when pumped into the well. To ensure optimum interval isolation, the ratio of the volume of the first slurry to the volume of the second slurry should be in the range 1:5 to 2:1.
A method for hydraulic refracturing within an interval with several hydraulic fractures and a non-damaging well killing method are also proposed.
The technical result is manifested in no formation damage and degradation of the sealing layer formed.