Gel Water Shutoff in Fractured or Faulted Horizontal Wells

Lane, Robert H.; Seright, R.S.

doi:10.2118/65527-ms

Cited by 34 publications

(25 citation statements)

References 17 publications

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“…Seright (2003) showed that once cured, CC/AP gel (a type of flowing gel) does not significantly leak off into porous rock with matrix permeability of 1.5 md in limestone core and 10,000 md in a polyethylene core during extrusion through a fracture of varying widths. High-molecular weight flowing gels have been shown to successfully reduce water production in producing wells (Borling, 1994;Demir et al, 2008;Lane and Seright, 2000;Moffitt, 1993;Wibowo et al, 1999). These gels are commonly placed by bullheading a certain volume into the reservoir, displacing them from the wellbore, and shutting in the well to allow curing (Lane, 1998;Southwell and Posey, 1994;Wibowo et al, 1999).…”

Section: Water Isolation Techniquementioning

confidence: 99%

Video Production Logging and Polymer Gel Yields Successful Water Isolation in the Fayetteville Shale

Brady

Shattuck

Parker

et al. 2013

Day 2 Tue, October 01, 2013

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Implementation of video production logging in conjunction with the use of high molecular weight polymer gels, has led to successful water isolation operations in the Fayetteville shale. The dry natural gas field, located in northern Arkansas, is a horizontal play with the wells cased, cemented, and completed with multi-stage slickwater fracture stimulations using perforation and plug technology (Harpel, 2012).Accurate detection of extraneous water entry points along the wellbore is vital for precise water isolation treatment, while still protecting the hydrocarbon producing intervals. Conventional production logging tools have been utilized in the past but proved to be expensive, due to the wellbore configuration, and imprecise because of the horizontal trajectory and debris encountered in the wellbore, with the debris generally rendering the spinner tool inoperable. Video logging tools, deployed in combination with high frequency temperature and pressure gauges, have considerably improved identification of water entries along the wellbore. In addition, the use of a smaller logging assembly has also drastically reduced workover costs by permitting logging through the existing 2-3/8" OD production tubing whereas conventional production logging required the removal of the production tubing due to size limitations. By maintaining this wellbore configuration the flowing conditions remain undisturbed and increase the accuracy of the production log.Based on video production log results the proper water isolation operation is subsequently selected. While cement squeezes and mechanical isolation tools have been applied successfully in horizontal wells to isolate inflow from water producing perforations, they are limited in their applications due to the wellbore configuration and operational costs. Recently, treatment of water producing perforations with chrome (III) carboxylate acrylamide polymer (CC/AP) gel technology has allowed selective treatment in additional sections of the wellbore. These gel treatments have yielded strong results by isolating water production and increasing gas production by reducing the flowing bottomhole pressure. Evaluation and selection of the appropriate polymer gel is discussed along with design considerations and implementation.

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Section: Water Isolation Techniquementioning

confidence: 99%

Video Production Logging and Polymer Gel Yields Successful Water Isolation in the Fayetteville Shale

Brady

Shattuck

Parker

et al. 2013

Day 2 Tue, October 01, 2013

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“…This fact allows gel propagation along fractures to be predicted. 39,61 [See Figs. 2 and 3 for propagation of a Cr(III)-acetate-HPAM gel in a vertical fracture of fixed height.]…”

Section: Individual Fractures That Cause Channeling From Injectors Tomentioning

confidence: 99%

A Strategy for Attacking Excess Water Production

Seright

Lane

Sydansk³

2003

SPE Production &Amp; Facilities

Self Cite

192

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This paper describes a straightforward strategy for diagnosing and solving excess-water-production problems. The strategy advocates that the easiest problems should be attacked first and that diagnosis of water production problems should begin with the information already at hand. A listing of water-production problems is provided, along with a ranking of their relative ease of solution. Although a broad range of water-shutoff technologies is considered, the major focus of the paper is when and where gels can be effectively applied for water shutoff. Proposed StrategyOur proposed strategy for attacking excess-water-production problems advocates that the easiest problems should be attacked first and that diagnosis of water production problems should begin with information already at hand. To implement this strategy, a prioritization of water production problems is needed. Based on extensive reservoir and completion engineering studies and analyses of many field applications, the various types of water problems were prioritized and categorized from least to most difficult, as shown in Table 1. The first three listings are the easiest problems (Category

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“…Injection of gels into formations containing fractures or channels (high permeability) has been studied extensively (Fielding et al 1994;Lane and Seright 2000;Sydansk and Southwell 2000;Wang et al 2001). Often, preformed gels (PGs) (instead of in-situ-formed gels) are preferred to avoid the difficulties associated with controlling gelation time and gel compositions during gel placement in porous media.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Correlation of Treatment in Weak and High-Permeability Formations by Use of Gel Particles

Al-Ibadi

Civan

2013

SPE Production &Amp; Operations

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Near-wellbore formation treatment by injection of suspensions of deformable gel particles is explored as a method of prevention of lost circulation of drilling fluids, handling of reservoir permeability heterogeneity, and controlling water production in mature waterflooded oil fields containing highly permeable and weak zones. Conditioning and plugging of such formations and the resulting permeability impairment occurring during injection of suspensions of deformable gel particles are investigated experimentally. The effect of concentration, flow rate, and gel-particle sizes of suspensions on the prevailing pore-plugging processes is inferred by flow tests conducted with 3,800-md 16-to 20-mesh sandpacks. Prevailing particle-entrapment and -permeabilityimpairment mechanisms are identified under various conditions by means of specially formulated diagnostic equations. Appropriate dimensionless groups are used to develop several empirical correlations of the experimental data, which can assist in choosing suitable gel-particle suspensions and proper application conditions required for effective near-wellbore-formation treatment. This reveals valuable insights and information about the functional trends of sandpack plugging by gel-particle suspensions, which can help in successful design and mitigation of formation-plugging treatments in the field.

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Gel Water Shutoff in Fractured or Faulted Horizontal Wells

Cited by 34 publications

References 17 publications

Video Production Logging and Polymer Gel Yields Successful Water Isolation in the Fayetteville Shale

Video Production Logging and Polymer Gel Yields Successful Water Isolation in the Fayetteville Shale

A Strategy for Attacking Excess Water Production

Experimental Investigation and Correlation of Treatment in Weak and High-Permeability Formations by Use of Gel Particles

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