Innovative Approach to Stimulate Horizontal Gas Well Using DTS Technology Combined with Coiled Tubing in Saudi Arabia

Garzon, Francisco Orlando; Solares, Jose Ricardo; Amorocho, Jose Ricardo; Al-Mulhim, A.K.; Kharrat, Wassim; Hamed-Naji, Iyad; Brown, George; Noya, Vidal

doi:10.2523/136925-ms

Cited by 9 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the past years, the use of DTS has gradually been implemented as part of treatment workflows in an effort to help evaluating the effectiveness of those said treatments (Sierra et al 2008;Glasbergen et al 2009;Cantaloube et al 2010;Garzon et al 2010;Harbi et al 2011), The method usually consists in analyzing the evolution of the temperature profiles, typically acquired during the pumping stage and/or a post-stimulation shut-in period. Temperature fronts, as well as specific cool-down and warm-back features, are tracked and can yield valuable information as to fluid placement and fluid diversion.…”

Section: Dts Inversion Methodologymentioning

confidence: 99%

First Real-Time DTS Inversion Job Worldwide

et al. 2013

View full text Add to dashboard Cite

The production curve of the main Mexican offshore fields has been decreasing rapidly year-on-year, representing a challenge to the eighth-largest oil producer country and an opportunity to implement new techniques for workover (WO) operations to increase production recovery.Within the most common WO activities developed in offshore Mexico is acid stimulation of carbonates, which was developed as pumping a large volume of fluids (solvents, HCl 15%, etc.) with minimum control for zonal coverage. Conventional coiled tubing (CT) jobs have improved this technique with the use of impact jetting tools to remove damage at the tubular and perforation holes and placing the treatment in the desired area. The estimation of fluid injection per zone has been evaluated using radioactive traces. However, the estimates of where the fluids go lack accuracy, and the radioactivity poses additional risks related to hazardous material handling.In 2009, a new interpretation technique to evaluate the treatment zonal coverage appeared that used CT with fiber optics. This distributed temperature sensing (DTS) enables the equipment to record temperature readings at several predetermined depths over time creating a survey that identifies, qualitatively, the admittance of the treated pay zones based on the formation's cold-down/heat-up effects. Unfortunately, this technique had some limitations as the data recorded needed to be converted, interpreted, and then translated into common oilfield language in the form of graphics and data tables. The time to get a final result from the readings to the customer was so long that the window to modify the current treatment to improve the well response was, on most occasions, already closed. DTS inversion brings a "real-time DTS matrix stimulation evaluation product" by using an inversion algorithm coupled with a fluid placement model to accurately quantify the amount of treatment placed across the treated zones of the well. A detailed case history from an offshore Mexico well describes the first worldwide real-time DTS inversion job and illustrates the workflow and advantages of this technique. The results from the technique showed a direct match with a previous evaluation of the formation through production logging conveyed on Wireline tools.

show abstract

Section: Dts Inversion Methodologymentioning

confidence: 99%

First Real-Time DTS Inversion Job Worldwide

et al. 2013

View full text Add to dashboard Cite

show abstract

“…This means that uncertainty must be dealt with when designing an acid treatment. One innovative approach to deal with such uncertainty in real-time, is based on using CT and DTS to identify fluid placement profile during intermediate shut-in periods, as described in (Garzon et al 2010) (Cantaloube et al 2010). It was therefore decided that the actual spotting volumes and position of the acid and self-diverting acid would be decided on site based on the observed injectivity profiles, and not a priori.…”

Section: Actual Treatment Designmentioning

confidence: 99%

“…Real-time DTS has been used recently in the context of matrix acidizing treatments to evaluate zonal coverage (Garzon et al 2010) (Cantaloube et al 2010) (Harbi et al 2011). This innovative approach enables engineers to deal with the uncertainty of predicting fluid placement along the well and to act in real-time following the interpretation of the DTS logs recorded during the treatment.…”

Section: Introductionmentioning

confidence: 99%

A New Methodology for Stimulation of a High-Water-Cut Horizontal Oil Well through the Combination of a Smart Chemical System with Real-Time Temperature Sensing: A Case Study of South Umm Gudair Field, PZ Kuwait

Al-Najim

Zahedi²,

Al-Khonaini

et al. 2012

All Days

View full text Add to dashboard Cite

This paper presents a case study of a matrix acidizing treatment in a well located at the neutral zone between Kuwait and Saudi Arabia, whereby the combination of a "smart fluid" in a stimulation treatment pumped through a Coiled-Tubing (CT) with the real time distributed temperature sensing (DTS) technology helped improve the real-time decision process of fluid placement, temporary plugging placement, and treatment efficiency evaluation. As part of the analysis process and to facilitate the onsite decision-making process, a temperature inversion technique was also used to translate the actual temperature profiles into fluid invasion profiles across the horizontal open-hole section of the well. Additionally, a full scale acid placement and thermal modeling is proposed in order to perform an in-depth post-treatment evaluation. The bottom hole data evaluation further confirmed the benefits of using a smart fluid. Following the treatment, the well produced at a rate of 1500 bbl/day with 17% water cut, which is well below the field average of ~50%.

show abstract

“…This technique yet does not apply to treatments being spotted through a moving and DTS-carrying CT nor to DTS acquired during a post-injection shut-in as we investigate here. The analysis of DTS logs acquired during a postinjection shut-in has been performed previously to estimate acid placement (Garzon, et al, 2010), and also successfully in real time (Cantaloube, et al, 2010), but always on a qualitative basis.…”

Section: Introductionmentioning

confidence: 99%

Inversion of DTS Logs To Measure Zonal Coverage During and After Wellbore Treatments With Coiled Tubing

et al. 2011

View full text Add to dashboard Cite

Distributed temperature sensing (DTS) is a fiber-optic technology that provides continuous temperature profiles along the length of a well. When placing the fiber inside a coiled tubing (CT), one can monitor the temperature evolution while pumping, as well as during a shut-in period. This evolution, in turn, yields some indications about the fluid placement performance or zonal coverage. So far, interpretation of such DTS traces has mostly been qualitative. The work presented here demonstrates how DTS data can be used, coupled with an inversion algorithm and a forward model of fluid injection into a reservoir, to quantify the intake profile of treatment fluid along the wellbore. Recent field cases of matrix acidizing treatments in carbonate reservoirs are analyzed to illustrate the workflow and how it may yield valuable information.

show abstract

Innovative Approach to Stimulate Horizontal Gas Well Using DTS Technology Combined with Coiled Tubing in Saudi Arabia

Cited by 9 publications

References 0 publications

First Real-Time DTS Inversion Job Worldwide

First Real-Time DTS Inversion Job Worldwide

A New Methodology for Stimulation of a High-Water-Cut Horizontal Oil Well through the Combination of a Smart Chemical System with Real-Time Temperature Sensing: A Case Study of South Umm Gudair Field, PZ Kuwait

Inversion of DTS Logs To Measure Zonal Coverage During and After Wellbore Treatments With Coiled Tubing

Contact Info

Product

Resources

About