Fracturing Fluid Loss Control Agent
a fracturing fluid and loss control technology, applied in fluid removal, wellbore/well accessories, chemistry apparatus and processes, etc., can solve the problems of fracturing fluid loss through fracture faces and reservoirs, and the benefit of treatment fluids is substantially reduced,
Inactive Publication Date: 2008-06-12
SCHLUMBERGER TECH CORP
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AI Technical Summary
Benefits of technology
[0010]While the conventional fluid loss control agents have been successfully used in fluid loss control, there still exists a need for better fluid loss control systems.
[0011]In one aspect, the present invention relates to a fluid loss control
Problems solved by technology
Unfortunately, hydrocarbon fluid bearing subterranean formations or strata are usually structurally heterogeneous, often containing zones of varying permeability and / or containing fractures.
Thus, channeling of the treatment fluids through the zones of greater permeability or fractures can occur and the benefit of the treatment fluids is substantially reduced.
One complication often encountered in well stimulation (fracturing) is the loss of fracturing fluids through the fracture faces and into the reservoir.
Excessive fluid loss is a cause of premature screenout where the proppant can no longer be carried further and it bridges, essentially stopping the fracture growth.
At permeabilities higher than, for example, about 5 md, fluid loss is excessive because it can no longer be controlled adequately by viscous forces.
Method used
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Embodiment Construction
[0014]The following description illustrates embodiments of the invention. The described examples are for illustrative purpose only. One of ordinary skill in the art would appreciate that these examples are not exhaustive and they are not intended to limit the scope of the invention. It should be understood that throughout this specification, when a concentration or amount range is described as being useful, or suitable, or the like, it is intended that any and every concentration or amount within the range, including the end points, is to be considered as having been stated. Furthermore, each numerical value should be read once as modified by the term “about” (unless already expressly so modified) and then read again as not to be so modified unless otherwise stated in context. For example, “a range of from 1 to 10” is to be read as indicating each and every possible number along the continuum between about 1 and about 10. In other words, when a certain range is expressed, even if on...
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A fluid loss control system for use in a well penetrating a subterranean formation includes a microgel for forming a monolayer on rock surfaces in fractures in the subterranean formation. A method for fluid loss control in a subterranean formation includes placing a fluid loss control solution in a wellbore penetrating the subterranean formation, wherein the fluid loss control solution comprises a microgel for forming a monolayer on rock surfaces in fractures in the subterranean formation.
Description
BACKGROUND OF INVENTION[0001]The invention relates generally to well fluid loss control systems and methods. Particularly, the invention relates to fluid loss control systems using microgels.[0002]Production of hydrocarbon fluid from a subterranean formation frequently involves the use of treatment fluids intended for specific zones. Unfortunately, hydrocarbon fluid bearing subterranean formations or strata are usually structurally heterogeneous, often containing zones of varying permeability and / or containing fractures. Thus, channeling of the treatment fluids through the zones of greater permeability or fractures can occur and the benefit of the treatment fluids is substantially reduced.[0003]For example, when production from a well is slow, one can perform “stimulation” to improve the production. Well stimulation may be performed by (among other methods): (1) injecting chemicals into the well bore to react with and / or dissolve damage; (2) injecting chemicals through the well bore...
Claims
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CPCC09K8/5083C09K2208/30C09K8/882C09K8/685
Inventor HUTCHINS, RICHARD D.
Owner SCHLUMBERGER TECH CORP