Improved Filtercake Cleanup Practices for Horizontal Well Completions in Unconsolidated Sands: Correlation Models for Filter-Cake Removal

Burnett, David; Gutierres, Fernando; Serrano, Gerardo Enrique

doi:10.2118/77523-ms

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…As noted in several previous publications, the accuracy of RDF fluids testing and filtercake damage analysis is strongly influenced by the drill solids. 6,7,8 In keeping with these earlier findings, formation sand was added to the RDF sample to simulate a drill solids concentration of 30 ppb.…”

Section: Core Requirementsmentioning

confidence: 90%

Laboratory Testing and Well Productivity Assessment of Drill-in-Fluid Systems in Order To Determine the Optimum Mud System for Alaskan Heavy-Oil-Multilateral Field Developments

Davis¹,

Beardmore²,

Burton³

et al. 2005

Proceedings of SPE Annual Technical Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe North Slope of Alaska has billions of barrels of heavy original oil in place (OOIP) residing in largely undeveloped reservoirs. Despite this large volume of heavy oil in place, the majority of reserves development on the slope to date has been focused on light crude. However over the past few years, operators have begun to develop the North Slope's vast heavy oil resource base.Recently, an optimum drill-influid/formation damage minimization study was undertaken by ConocoPhillips, BP, and its partners in order to determine the optimum reservoir drilling fluid for the heavy oil sands in order to maximize well productivity and project value.

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Section: Core Requirementsmentioning

confidence: 90%

Laboratory Testing and Well Productivity Assessment of Drill-in-Fluid Systems in Order To Determine the Optimum Mud System for Alaskan Heavy-Oil-Multilateral Field Developments

Davis¹,

Beardmore²,

Burton³

et al. 2005

Proceedings of SPE Annual Technical Conference and Exhibition

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show abstract

“…Openhole sections are more susceptible to damage formation and, concerning horizontal wells, we can mentioned the long contact time between drilling fluid and reservoir formation and the extensive exposed zones of production as main causes (Jilani, 2000). Drill-in fluids form tight, thin filter cakes that controls fluid leak off and afford more complete wellbore cleanup properties than standard drilling ones (Burnett et al, 2002). Some examples of a successful design and applications of drill-in fluids can be found in Bradshaw In general these water based fluids includes thickener, polymer's filtrate controller, salts inhibitors of clay and alkaline, weighting and buffering agents.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Calculation of Polymer Base Mud without Solids Invasion in a Porous Media

Moreno¹,

Bonet²

2010

Proceedings of SPE EUROPEC/EAGE Annual Conference and Exhibition

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The present paper intends to compare experimental and simulation results for polymer based flow through porous media. An innovative experimental study, including injection experiments and CT scanning evaluation (X-Ray/2D), was carried out to investigate the characteristics of filtrate invasion.Normally the drilling mud includes solid particles to minimize mud filtrate invasion, however some authors emphasizes the use of drill-in fluids solid free to minimize irreversible damage due to pore plugging by mud's particles. Moreover, peculiar non-Newtonian behavior of polymers has been pointed out as possible solutions to these problems.For these reasons, we performed experimental and numerical calculation of polymer base mud invasion in a porous media without bridging agents. We are presenting the results of 24 tests and studying in detail one of various experimental runs. Calculated data and laboratory measured data were compared with drilling fluid invasion's process. Invasion depth, contact time and saturation profiles were carefully analyzed. The CT scan images were very helpful to inform the pattern invasion: stabilized or fingering invasion. The information is very helpful to program adequate drilling mud.

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Single-Stage Chemical Treatment for Oil-Based Mudcake Cleanup: Field Case and Laboratory Studies

et al. 2010

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Formation damage minimization and removal are important factors in enhancing field productivity and achieving targeted production rate. While formation damage is anticipated during drilling, an effective wellbore cleanup fluid becomes essential to remove mud damage and enhance well productivity. Filter cake layer created by drilling fluid can impair production considerably and should be removed prior to production using an effective treatment. Filter cake can be removed using a chemically designed filter cake removal treatment. The design of the treatment requires considerations of mud type and reservoir conditions. Also, it is important to consider the compatibility aspect of the treatment fluid with formation fluids and drill-in fluid base oil. Incompatible fluids result in precipitation which leads to further formation damage. In Saudi Arabia, many sandstone reservoirs are drilled with invert emulsion drill-in fluid to avoid the risk of clays swelling, which can lead to hole sloughing and formation damage. However, production impairment due to mud damage effect was observed in some horizontal wells drilled with invert emulsion drill-in fluid and completed with stand-alone screens as a result of improper mud managemet. After being put on production, their production rates have been reduced significantly with time. The decrease in production was related to screen blockage and mud cake impairment. A newly developed single-stage treatment was spotted and soaked to remove oil based mud cake and screen blockage. A significant sustained improvement in production was noticed and flowback solids indicated removal of screen blockage and mud cake. Lab studies were conducted at reservoir simulated conditions to evaluate the effectiveness of the treatment. The study covered testing the treatment filter cake removal efficiency, return permeability tests with reservoir core samples, and compatibility tests with formation fluids and drill-in fluid base oil. This paper will discuss in detail the laboratory work conducted and the successful field treatment performed.

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Improved Filtercake Cleanup Practices for Horizontal Well Completions in Unconsolidated Sands: Correlation Models for Filter-Cake Removal

Abstract: TX 75083-3836, U.S.A., fax 01-972-952-9435.

Cited by 8 publications

References 13 publications

Laboratory Testing and Well Productivity Assessment of Drill-in-Fluid Systems in Order To Determine the Optimum Mud System for Alaskan Heavy-Oil-Multilateral Field Developments

Laboratory Testing and Well Productivity Assessment of Drill-in-Fluid Systems in Order To Determine the Optimum Mud System for Alaskan Heavy-Oil-Multilateral Field Developments

Experimental and Numerical Calculation of Polymer Base Mud without Solids Invasion in a Porous Media

Single-Stage Chemical Treatment for Oil-Based Mudcake Cleanup: Field Case and Laboratory Studies

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