Successful Deployment of a New Stimulation Chemical,
Post-Horizontal-Openhole Gravel Pack in Wells Drilled With Both Water-Based and
Oil-Based Drill-In Fluid

Davidson, Eric H.; McMillan, David G.; Martin, Fraser; Morton, Keith; Lenz, Ronald

doi:10.2523/101964-ms

Cited by 5 publications

(2 citation statements)

References 9 publications

(9 reference statements)

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“…Moreover, breaker efficiency measured as a function of soak / clean-up time can also be negatively affected by the presence of a gravel pack (Brady et al, 2000b). This work compares the performance of two commercial RDF breakers in a GP application, under linear and radial flow conditions, using a modified HTHP cell and the DDRP device described by Davidson et al (2006). Unlike the HTHP cell, the DDRP cell can be arranged such that the RDF deposition, displacement, and stimulation stages of a horizontal Open Hole Gravel Pack (OHGP) can be simulated both dynamically and sequentially, without system disruptions.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its simplicity, the High Temperature High Pressure (HTHP) cell has been widely adopted by the Industry as a standard method to evaluate the performance of RDF filter cake stimulation treatments, but this technique has a number of limitations in terms of the quality and reproducibility of the deposited filter cake, as well as its ability to predict flow initiation pressure and return to flow percentage after the stimulation treatment. This work compares the performance of two commercial RDF breakers in a GP application, under linear and radial flow conditions, using a HTHP cell and the Dynamic Displacement Radial Permeameter (DDRP) device described by Davidson et al (2006). Unlike the HTHP cell, the DDRP cell can be arranged such that the RDF deposition, displacement, and stimulation stages of a horizontal Open Hole Gravel Pack (OHGP) can be simulated dynamically and sequentially, without system disruptions.…”

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Laboratory Evaluation of RDF Breakers Under Linear and Radial Flow Conditions

Marquez

Lenz

2010

All Days

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Drilling-induced formation damage is an area of concern when it comes to wellbore productivity, particularly for highly deviated / horizontal open hole completions. A great deal of effort has been devoted to understanding the damage mechanisms associated with Reservoir Drill-in Fluids (RDF), and to develop systems to specifically target bio-polymers and bridging agents in the RDF cake for improved wellbore clean-up. Experimental techniques to evaluate the performance of RDF clean-up treatments, however, have not received much attention. Due to its simplicity, the High Temperature High Pressure (HTHP) cell has been widely adopted by the Industry as a standard method to evaluate the performance of RDF filter cake stimulation treatments, but this technique has a number of limitations in terms of the quality and reproducibility of the deposited filter cake, as well as its ability to predict flow initiation pressure and return to flow percentage after the stimulation treatment. This work compares the performance of two commercial RDF breakers in a GP application, under linear and radial flow conditions, using a HTHP cell and the Dynamic Displacement Radial Permeameter (DDRP) device described by Davidson et al. (2006). Unlike the HTHP cell, the DDRP cell can be arranged such that the RDF deposition, displacement, and stimulation stages of a horizontal Open Hole Gravel Pack (OHGP) can be simulated dynamically and sequentially, without system disruptions. The breakers evaluated are combinations of polymer-specific enzymes, chelating agents, and acid. Breaker "A" is a buffered acid system, while Breaker "B" contains a slow release acid precursor. The clean-up efficiency of each breaker, relative to a control system with no breaker, was determined as a function of flow rate using the DDRP device. These results were compared to those obtained under linear flow conditions with the HTHP cell. Significant differences were observed between the flow initiation pressure values measured with the HTHP cell and those measured with the DDRP, particularly for the system with no breaker. Differences were also observed in terms of percentage return to flow; higher percentages were consistently measured with the DDRP device. The difference between the percentage return to flow measured with the HTHP cell and the DDRP device was less than 5% for the system with no breaker, and 20% to 55% for the systems treated with the breaker solutions. In general, linear flow tests with the HTHP cell are useful as a pre-screening tool, but more sophisticated equipment such as the DDRP device can simulate downhole flow patterns and cake deposition more accurately and reproducibly. They also provide insight to important design parameters such as breaker activation time and flow rate dependencies of the clean-up treatment.

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Section: Introductionmentioning

confidence: 99%

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Laboratory Evaluation of RDF Breakers Under Linear and Radial Flow Conditions

Marquez

Lenz

2010

All Days

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Cleanup of Oil-Based Mud Filter Cake Using an In-Situ Acid Generator System by a Single-Stage Treatment

Binmoqbil

Alotaibi

Al-Faifi

et al. 2009

SPE Saudi Arabia Section Technical Symposium

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Near-wellbore formation damage is expected during the drilling operations. Minimization, prevention, and removal of near-wellbore damage are essential to maximize well productivity. One of the major sources of skin damage is the residual filter cake developed by reservoir drill-in fluid (DIF). Therefore, an efficient filter cake cleanup method should be considered to enhance well productivity. Oil producers in sandstone reservoirs are being drilled with invert emulsion DIF during oil reservoir drilling. Standard completion of oil wells is with stand-alone screens. Although screens stabilize the wellbore and address sand control issues, it can also act as a trap for filter cake, resulting in high drawdown pressure. An in-situ acid-precursor technology, which generates organic acid, was proposed to be used. The prime advantage of this technology, especially in long horizontal wells, is the uniform distribution of acid during precursor to remove oil-based mud (OBM) filter cake by a single-stage. A special surfactant blend was incorporated in the cleanup fluid to alter the wettablity of the oily filter cake, and therefore, facilitate the reactivity of the produced acid with calcium carbonate particles. Detailed lab studies were conducted to evaluate the efficiency of the in-situ acid generator technology. The lab studies include various tests to evaluate filter cake removal efficiency, return permeability on real core samples, compatibility with formation fluids, and strength of dissolving calcium carbonate particles. Based on lab results, it was recommended to spot the single-stage filter cake cleanup fluid as a treatment for an oil well. This paper will discuss in detail the laboratory work that was conducted to evaluate the filter cake cleanup fluid performance. Introduction Minimization and removal of formation damage is an ultimate goal in drilling and completion designs to reach the target production rate. Field practices and numerous case studies have shown that near-wellbore damage is mainly caused by the drill-in fluid (DIF), which may result in major production restriction. The damage is caused by a form of external damage, such as mud cake. Invasion of mud solids and filtrate is a major source of the near wellbore damage (Almond et al., 1995; Leschi et al., 2006). The conventional near-wellbore damage removal or filter cake cleanup methods by chemical means are enzymes, chelating agents, reactive mineral acids, oxidizers, or a combination of these chemicals (Davis et al., 2004; Davidson, E. et al., 2006; Al-Otaibi et al., 2004). When it comes to removing an oil-based mud (OBM) filter cake, prior stages should be considered to these conventional treatments. The wettability of the oily filter cake particles must be altered from oil-wet to water-wet. This is usually done through multi-stages and consumption of large volumes of solvents, mutual solvents, and surfactants mixed in a carrying fluid. Eventually, for an operator, completing a well drilled with an OBM will be time-consuming and expensive using the mentioned conventional treatments.

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Successful Deployment of Horizontal Openhole Gravel Pack with Alternate Path Technique and Filter-Cake Breaker Placement for Effective Well Cleanup Offshore Myanmar

Ogueri

Somkleeb

Falla

2020

SPE/IATMI Asia Pacific Oil &Amp; Gas Conference and Exhibition

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The Badamyar project is an offshore gas field located 220 km south of Yangon in the Republic of the Union of Myanmar. In February 2017, four gas wells were successfully drilled and completed using horizontal openhole gravel packing in the Badamyar gas field. The downhole completion design adopted was an alternate path technique using filter-cake breaker deployment for effective well cleanup. Initial geomechanical studies performed in the field show that the sands have low mechanical strength; consequently, they are unconsolidated. This was verified with sonic measurement of 120 us/ft (more than 110 us/ft). An active sand control technique was deemed necessary to ensure a robust well completion with longevity for expected gas production. Based on the comparative risk analysis conducted by the operator for various types of sand control and reservoir drainage, a horizontal openhole gravel pack method was selected to complete the four wells. During the well planning stage, the following specific challenges were identified for the installation of the lower completion: Openhole gravel placement method; alpha/beta wave vs. alternate path technique considering low fracture gradient to achieve 100% pack efficiencyEfficient gravel pack carrier fluid for the selected methodExpected long drain hole in a clay sensitive environmentEffective filter-cake cleanup post-gravel packVery fine, poorly consolidated, and immature shaly sands Downhole sand control equipment deployment, gravel pack placement, filter-cake removal, and initial production results have proven the selected gravel pack method to be successful in the Badamyar field. This paper presents the measures taken to address the project challenges during the design and execution phase and the results achieved. The success achieved can be adopted for the completion of high-rate gas wells with similar reservoir conditions in this area and beyond.

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Successful Deployment of a New Stimulation Chemical, Post-Horizontal-Openhole Gravel Pack in Wells Drilled With Both Water-Based and Oil-Based Drill-In Fluid

Cited by 5 publications

References 9 publications

Laboratory Evaluation of RDF Breakers Under Linear and Radial Flow Conditions

Laboratory Evaluation of RDF Breakers Under Linear and Radial Flow Conditions

Cleanup of Oil-Based Mud Filter Cake Using an In-Situ Acid Generator System by a Single-Stage Treatment

Successful Deployment of Horizontal Openhole Gravel Pack with Alternate Path Technique and Filter-Cake Breaker Placement for Effective Well Cleanup Offshore Myanmar

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