公开(公告)号：US09803132B2

公开(公告)日：2017-10-31

申请号：US14768874

申请日：2014-02-18

Applicant: CHEVRON U.S.A. INC.

Inventor： Michael James Fuller ,  Maricel Marquez ,  William David Norman

IPC: E21B43/267 ,  C09K8/80 ,  C09K8/68 ,  E21B43/26

CPC classification number: C09K8/685 ,  C09K8/80 ,  C09K2208/10 ,  E21B43/26 ,  E21B43/267

Abstract: A method includes placing a treatment fluid including a crosslinked gel in a wellbore penetrating a subterranean formation, the crosslinked gel including a gelling agent and a borate crosslinking agent, de-crosslinking a portion of the crosslinked gel, the de-crosslinking induced by a sufficient change in operating pressure, the de-crosslinking providing a release of active sites on the borate crosslinking agent and reducing the viscosity of the treatment fluid, and providing a borate-affinity agent to capture the released active sites on the borate crosslinking agent. A fracturing fluid includes a gelling agent, a borate crosslinking agent, a latent borate-affinity agent, and a proppant.

公开(公告)号：US20160032174A1

公开(公告)日：2016-02-04

申请号：US14768874

申请日：2014-02-18

Applicant: CHEVRON U.S.A. INC.

Inventor： Michael James Fuller ,  Maricel Marquez ,  William David Norman

IPC: C09K8/68 ,  E21B43/26 ,  E21B43/267 ,  C09K8/80

CPC classification number: C09K8/685 ,  C09K8/80 ,  C09K2208/10 ,  E21B43/26 ,  E21B43/267

Abstract: A method includes placing a treatment fluid including a crosslinked gel in a wellbore penetrating a subterranean formation, the crosslinked gel including a gelling agent and a borate crosslinking agent, de-crosslinking a portion of the crosslinked gel, the de-crosslinking induced by a sufficient change in operating pressure, the de-crosslinking providing a release of active sites on the borate crosslinking agent and reducing the viscosity of the treatment fluid, and providing a borate-affinity agent to capture the released active sites on the borate crosslinking agent. A fracturing fluid includes a gelling agent, a borate crosslinking agent, a latent borate-affinity agent, and a proppant.

Abstract translation: 一种方法包括将包含交联凝胶的处理流体放置在穿透地下地层的井眼中，所述交联凝胶包括胶凝剂和硼酸盐交联剂，将交联凝胶的一部分去交联，由足够的 操作压力的变化，去交联提供硼酸盐交联剂上的活性位点的释放并降低处理流体的粘度，以及提供硼酸盐亲合剂以捕获硼酸盐交联剂上释放的活性位点。 压裂液包括胶凝剂，硼酸盐交联剂，潜在硼酸盐亲合剂和支撑剂。