An Effective Matrix Stimulation Technique for Horizontal Wells

Tambini, Mauro

doi:10.2523/24993-ms

Cited by 9 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 and 2 are all proportional to flow rate, provided that the flow regime in the wellbore is laminar. The results indicate that, within the physics of our model, the improvement in placement reported when the MAPDIR technique is used together with low-viscosity fluids 12 is not the result of a diversion effect resulting from high rate alone. Hill and Rossen 15 reached similar conclusions when neglecting wellbore effects.…”

Section: Case 2 Presence Of a Thief Zone Near The Toe Or Heel Of Thementioning

confidence: 56%

“…The displaced fluids are assumed to have a Newtonian viscosity, R , and to be incompressible up to 1.5 m from the wellbore. 12 Beyond this distance they are assumed to be compressible.…”

Section: Description Of the Modelmentioning

confidence: 99%

“…11 Recently, the maximum pressure drop and injection rate technique, which involves injecting the acid at the highest possible matrix-treating rate, has been promoted. 10,12,13 Extension to Horizontal Well Stimulation. For horizontal wells drilled and completed with little fluid loss to the formation, the cleanup of impairment requires that acid penetrate only a short distance into the formation.…”

Section: Introductionmentioning

confidence: 99%

“…Other CT-based methods involve either circulating acid up the CT/tubing annulus or bullheading acid or inert fluid along this annulus. 8,12 Many horizontal wells have openhole completions, often with a slotted liner or prepacked screen. These completions restrict the application of packers and selective-placement tools.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quantifying Acid Placement: The Key to Understanding Damage Removal in Horizontal Wells

Jones

Davies

1998

SPE Production &Amp; Facilities

View full text Add to dashboard Cite

The placement of acid over the entire wellbore interval can be the key to successful stimulation treatments in wells with long (often horizontal) completion intervals. In this paper, we discuss computer simulations performed to determine how fluids are distributed in the wellbore during acidizing treatments. One of the novel aspects of these simulations is the inclusion of wellbore effects arising from the transient flow of acid and diverter along the wellbore. The results suggest a possible cause of some of the poor stimulation performances observed in the field when acid was injected without diversion or selective-placement techniques. Such situations can result in the acid contacting only a small fraction of the treatment interval. The simulations also show how making the acid viscous could have improved the stimulation performance.

show abstract

Section: Case 2 Presence Of a Thief Zone Near The Toe Or Heel Of Thementioning

confidence: 56%

“…The displaced fluids are assumed to have a Newtonian viscosity, R , and to be incompressible up to 1.5 m from the wellbore. 12 Beyond this distance they are assumed to be compressible.…”

Section: Description Of the Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantifying Acid Placement: The Key to Understanding Damage Removal in Horizontal Wells

Jones

Davies

1998

SPE Production &Amp; Facilities

View full text Add to dashboard Cite

show abstract

“…An example is the successful stimulation of the horizontal wells using the matrix high rate treatments 25 and traverse multi fracturing technique 26 .…”

Section: Emerging Stimulation Techniquesmentioning

confidence: 99%

Beyond Acidizing and Fracturing

Tambini¹

2003

Proceedings of SPE European Formation Damage Conference

Self Cite

View full text Add to dashboard Cite

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe oil industry is still focusing on the optimization of hydrocarbon production with the minimum cost possible in complete HSE respect. Nowadays a continuous flow of innovative ideas generates worldwide new technological frontiers. As a result, we witness remarkable applications of new well solutions and techniques. In this scenario we would like to give an overview of the possible answers to the technological needs and actions towards Stimulation Treatments and Formation Damage Removal. The main issues to investigate are:• if the mature and worldwide applied techniques of Acidizing and Fracturing are still adequate to the new well geometry scenario • if the "novel" technologies are well known and cost effective • if innovative ideas on formation stimulation and damage removal are to be better investigated and implemented.

show abstract

Quantifying Acid Placement: The Key to Understanding Damage Removal in Horizontal Wells

Jones

Davies

1996

SPE Formation Damage Control Symposium

View full text Add to dashboard Cite

The placement of acid over the entire wellbore interval can be the key to successful stimulation treatments in wells with long (often horizontal) completion intervals. This paper discusses computer simulations performed to determine how fluids are distributed in the wellbore during bullheaded and circulated acidizing treatments. One of the novel aspects of these stimulations is the inclusion of wellbore effects arising from the transient flow of acid and diverter along the wellbore. The results give an insight into a possible cause of some of the poor stimulation performances observed in the field when typical volumes of low-viscosity acids were injected without diversion or selective-placement techniques. Such situations can result in the acid coming into contact with only a small fraction of the treatment interval. The simulations also show how viscosifying the acid could have improved the stimulation performance. This paper outlines the basic concepts of the simulations and some of the general trends observed from the results. In particular, the inclusion of transient wellbore flow calls for the modification of recently published guidelines for various diversion techniques. Introduction Horizontal wells are widely recognized to have advantages over vertical wells. They are popularly used, for example, to exploit thin oil-rim reservoirs, to avoid such drawdown-related problems as water/gas coning and sand production, and to extend wells by means of multiple drainholes. Yet their potential productivity improvement factors often fail to materialize in practice as a result of the skin (permeability-impairing near-wellbore damage) caused by drilling and completing the wells. Recent investigations have shown that skin can be as detrimental to the performance of horizontal wells as it is to that of vertical wells1–3. In fact, horizontal wells often experience higher skin values than conventional wells, as a result of the slotted liners or barefoot completions that are employed in such wells. Unlike the earlier industry standard of cased and cemented completions, these horizontal-well completions lack perforations. Field and laboratory experience has shown perforations to be an effective means of bypassing the impaired zone. For that reason the avoidance of near-wellbore permeability impairment, e.g., through the use of new drilling fluids and under-balanced drilling and completion, has been emphasized in the drilling of openhole horizontal wells4–6. A significant research effort over the last few years has also involved the experimental determination of the best clean-up procedures to follow prior to production7,8. This interest in wellbore cleaning has led to a resurgence of matrix acidizing, which over the years has proven to be a cost-effective method of removing impairment in the near-wellbore area of vertical wells. The stimulation of horizontal wells by means of matrix acidizing, however, has often met with limited success.

show abstract

An Effective Matrix Stimulation Technique for Horizontal Wells

Cited by 9 publications

References 0 publications

Quantifying Acid Placement: The Key to Understanding Damage Removal in Horizontal Wells

Quantifying Acid Placement: The Key to Understanding Damage Removal in Horizontal Wells

Beyond Acidizing and Fracturing

Quantifying Acid Placement: The Key to Understanding Damage Removal in Horizontal Wells

Contact Info

Product

Resources

About