US 7,621,330 B1Granted

Methods of using a lower-quality water for use as some of the water in the forming and delivering of a treatment fluid into a wellbore

AssigneeHalliburton Energy Services, Inc.

InventorsHarold Walters, Jason Bryant, Leonard Case, Jonn Thompson, Michael Segura, Herbert Hornick, Von Parkey, Shaun Burns, Billy Francis Slabaugh, Jr.

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Abstract

The invention is for a method of forming and delivering a treatment fluid into a wellbore. In one aspect, a method is provided for pumping a first fluid having a relatively high concentration of a particulate suspended therein and pumping a second fluid having either none of the particulate or a relatively low concentration of the particulate suspended therein, and then merging at least the first and second fluids to form a treatment fluid having a merged concentration of the particulate. According to this aspect, the first fluid has a relatively high concentration of a hydratable additive and the second fluid has either none or a relatively low concentration of the hydratable additive.

Claims24

Dependent claims

A method of forming and delivering a treatment fluid into a wellbore, the method comprising the steps of continuously:

(a) pumping a first fluid comprising a first aqueous solution;
(b) pumping a second fluid comprising a second aqueous solution;
(c) merging at least the first and second fluids to form a treatment fluid comprising a merged aqueous solution, wherein the merged aqueous solution comprises at least 25% by weight of the first aqueous solution and at least 25% by weight of the second aqueous solution, and wherein the merged aqueous solution has a merged viscosity of less than 100 cP at 40 l/s and at 25° C. (77° F.), and wherein the step of merging is after the steps of pumping the first and second fluids;
and then
(d) directing the treatment fluid into the wellbore;
wherein:
(i) the merged aqueous solution has a merged concentration of at least one component selected from the group consisting of:
a dissolved ion, oil, grease, a production chemical, and suspended solids;
(ii) the first aqueous solution has a concentration of the at least one component that is substantially lower than the merged concentration of the at least one component;
(iii) the second aqueous solution has a concentration of the at least one component that is substantially higher than the merged concentration of the at least one component;
and
(iv) the first, second, and treatment fluids are handled as fluid streams.

9 more elements

A method of forming and delivering a treatment fluid into a wellbore, the method comprising the steps of continuously:

(a) pumping a first fluid comprising a first aqueous solution;
(b) pumping a second fluid comprising a second aqueous solution;
(c) merging at least the first and second fluids to form a treatment fluid comprising a merged aqueous solution, wherein the merged aqueous solution comprises at least 25% by weight of the first aqueous solution and at least 25% by weight of the second aqueous solution, and wherein the merged aqueous solution has a merged viscosity of less than 100 cP at 40 l/s and at 25° C. (77° F.), and wherein the step of merging is after the steps of pumping the first and second fluids;
and then
(d) directing the treatment fluid into a wellbore;
wherein:
(i) the merged aqueous solution has a merged concentration of total dissolved solids;
(ii) the first aqueous solution has a concentration of total dissolved solids that is substantially lower than the merged concentration of total dissolved solids;
(iii) the second aqueous solution has a concentration of total dissolved solids that is substantially higher than the merged concentration of total dissolved solids;
and
(iv) the first, second, and treatment fluids are handled as fluid streams.

8 more elements

Dependencies are inferred from the claim text.