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High performance brine viscosifier

一种盐水、盐水配制的技术，应用在钻孔的组合物、化学仪器和方法等方向，能够解决降低烃采收率、地层损坏等问题

Inactive Publication Date: 2019-08-23
SAUDI ARABIAN OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluid leaks are known to cause formation damage, potentially reducing hydrocarbon recovery

Method used

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  • High performance brine viscosifier
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Examples

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Embodiment Construction

[0038] For a more detailed understanding of the features and advantages of embodiments of high performance brine viscosifier compositions, systems, methods, etc., as will become apparent hereinafter, reference may be made to the embodiments of the present disclosure, which are illustrated in the accompanying drawings. Embodiments of the disclosure having been briefly summarized above have been described in more detail, and the accompanying drawings constitute a part of this specification. It is to be noted, however, that the drawings illustrate only different embodiments of the disclosure and are therefore not to be considered limiting of the scope of the disclosure, which may include other effective embodiments.

[0039] see figure 1 , showing a general schematic of the association of polycations with anionic surfactants. In certain embodiments of the brine viscosifiers described herein, the polycation is poly(diallyldimethylammonium chloride) (PolyDADMAC), which may optiona...

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Abstract

A viscosity-retaining formulation for use in high-temperature hydrocarbon-bearing reservoir applications. The formulation includes a brine composition and a viscosity enhancing composition, the viscosity enhancing composition operable to enhance viscosity retention of the viscosity-retaining formulation at least, in part, through micellization, the viscosity enhancing composition including a polycation composition and an anionic surfactant composition.

Description

technical field [0001] Embodiments of the present disclosure relate to fluids used in processes for producing hydrocarbons from hydrocarbon containing reservoirs. In particular, embodiments of the present disclosure relate to compositions and methods for viscosifying fluids (eg, drilling fluids) used in processes for producing hydrocarbons from hydrocarbon-bearing reservoirs. Background technique [0002] With the increase of oil and gas reservoir construction depth and the development of slim hole horizontal drilling, the demand for high-density solid-free reservoir drilling fluid (RDF), completion fluid (CF) and workover fluid (WF) increases accordingly. Viscosifiers currently used in RDF, CF and WF are not compatible with high density brines, or require the use of extremely expensive brines such as cesium formate to achieve the target density. Brine-based drilling fluids have limited application in reservoir sections where temperatures exceed 260°F because the polymers u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/12
CPCC09K8/035C09K8/12
Inventor 彼得·J·博尔
Owner SAUDI ARABIAN OIL CO