公开(公告)号：US20210277302A1

公开(公告)日：2021-09-09

申请号：US17331252

申请日：2021-05-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Xiangdong Qiu ,  Dominic Joseph Brady ,  Ziad Al-Jalal ,  Mohan Kanaka Raju Panga ,  Christopher Daeffler

IPC: C09K8/72 ,  C09K8/82

Abstract: Described herein are methods for treating a subterranean formation penetrated by a wellbore with a retarded acidizing fluid containing an acid and an acid retarding agent, the concentrations of which are adjusted based on measured parameter values of the formation. Also described is a method for treating a subterranean formation by introducing an acid to the formation following the introduction of an acid retarding agent to the formation. Also described is a method for acid fracturing a subterranean formation including reducing the concentration of an acid retarding agent contained in a retarded acidizing fluid over the course of the acid fracturing operation.

公开(公告)号：US11091689B2

公开(公告)日：2021-08-17

申请号：US15757423

申请日：2016-08-30

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Christopher Daeffler ,  Mohan Kanaka Raju Panga

IPC: C09K8/66 ,  C09K8/74 ,  E21B43/26 ,  E21B41/02 ,  C09K8/60 ,  C09K8/70

Abstract: Described herein is a multi-phase aqueous composition containing a surfactant; a first phase comprising water, an acid, and a water-soluble acid retarding agent; and a second phase selected from the group consisting of an immiscible organic phase, a gas, and combinations thereof. Further described are methods of making and using such compositions.

公开(公告)号：US20190062621A1

公开(公告)日：2019-02-28

申请号：US16018385

申请日：2018-06-26

Applicant: Schlumberger Technology Corporation

Inventor： Mohan Kanaka Raju Panga ,  Philippe Enkababian ,  Christopher Daeffler ,  Tausif Khizar Ahmed ,  Kong Teng Ling

IPC: C09K8/74 ,  C09K8/60 ,  C09K8/72 ,  C09K8/54 ,  E21B43/26

Abstract: A method is described for treating a subterranean formation penetrated by a wellbore including injecting into the formation a treatment fluid including a rheological modifier; at least one viscoelastic surfactant (VES) at a concentration of between about 0.1 and about 10 percent by weight; and a formation-dissolving agent selected from the group consisting of hydrochloric acid, formic acid, acetic acid, lactic acid, glycolic acid, sulfamic acid, malic acid, citric acid, tartaric acid, maleic acid, methylsulfamic acid, chloroacetic acid, aminopolycarboxylic acids, 3-hydroxypropionic acid, polyaminopolycarboxylic acids, salts thereof and mixtures of said acids and salts.

公开(公告)号：US20160298024A1

公开(公告)日：2016-10-13

申请号：US15090747

申请日：2016-04-05

Applicant: Schlumberger Technology Corporation

Inventor： Mohan Kanaka Raju Panga ,  Christopher Daeffler ,  Olga Vladimirovna Nevvonen

IPC: C09K8/74 ,  E21B43/26 ,  E21B43/16

CPC classification number: E21B43/26 ,  C09K8/74 ,  C09K8/845

Abstract: Methods include combining an amount of water and an acid retarding agent (RA), where the amount of water is present in an amount up to about 5 times the mass of the RA, inclusive, and wherein the RA includes at least one salt compound. An amount of acid is dissolved in the combined amount of water and RA to form a composition, where the amount of acid is a molar ratio of acid:RA of between 4.0 and 0.2, inclusive, and wherein the amount of acid is up to about 36% by weight of total weight of the composition. The composition is injected into a wellbore penetrating a subterranean formation at a pressure, which may be less than the fracture initiation pressure of the subterranean formation in some cases, while in other cases equal to or greater than the fracture initiation pressure.

Abstract translation: 方法包括组合一定量的水和酸缓释剂（RA），其中水的量以至多约RA的质量的5倍的量存在，其中RA包含至少一种盐化合物。 将一定量的酸溶解在水和RA的组合量中以形成组合物，其中酸的摩尔比为4.0至0.2的摩尔比，其中酸的量达到约 36重量％的组合物的总重量。 在某些情况下，将组合物注入渗透地下地层的井筒中，压力可能小于地层的断裂开始压力，而在其它情况下等于或大于断裂起始压力。