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Keywords: acid
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Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206099-MS
... ceased injection. Multiple attempts and investments were made in recent years to resume access to the injection zone using high-pressure hydro-jetting tools coupled with acid treatments. However, these attempts yielded futile efforts. Before proceeding with the decision of workover, it was decided to go...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206095-MS
... reservoir characterization downhole intervention core analysis flow in porous media production enhancement upstream oil & gas enhanced recovery complex reservoir polymer concentration porosity experiment pressure response acid injection fluid dynamics pv bt rock heterogeneity...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206105-MS
.../unsuccessful results in different well types which enabled us to make a fruitful analysis for future wells. BR-387, 389 and 421 ( Figure-2 ) wells were selected as candidates for acid fracturing operations, while BR-499 was proposed as a new well for proppant fracturing to compare results which will be main...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206154-MS
... and reliable results. These results were achieved via the introduction of single-phase retarded acid (SPRA) and viscoelastic diverting acid (VEDA) to both active and shut-in wells offshore. The introduction of SPRA and VEDA was possible after extensive laboratory testing including core flow tests, solubility...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-205948-MS
...Abstract Abstract As known, fracture's capacity and penetration are two key factors for fulfillment of the fracturing jobs including conventional and acid fracturing process. Penetration of acid into existing fractures can improve fracture capacity by etching of fracture surface. Increasing...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-205975-MS
...Abstract Abstract Matrix acidizing is a common but complex stimulation treatment that could significantly improve production/injection rate, particularly in carbonate reservoirs. However, the desired improvement in all zones of the well by such operation may not be achieved due to existing...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-205990-MS
... Typical acid fracturing treatments consist of pumping alternating stages of viscous pad and acid, with the former meant to generate a fracture geometry of desired dimensions and the latter to "finger" through the pad and upon contact with walls of the fracture, spend in order to create a non...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206039-MS
...Abstract Abstract Acid jobs with conventional acid systems like hydrochloric acid in high temperature conditions is challenging on various fronts. Enhanced reactivity of strong acids results in poor penetration and severe face dissolution. Also, it aggravates the issue of corrosion of downhole...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206037-MS
...Abstract Abstract This paper presents the successful stimulation workflow case for a carbonate acidizing pilot project performed in Gigante field in the Matambo block of the Upper Magdalena Valley basin in Colombia. An adecuate diagnostic, laboratory testing, treatment fluid selection, on-site...
Proceedings Papers

Publisher: Society of Petroleum Engineers (SPE)
Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206363-MS
.... However, drawbacks intrinsic to the technology architectures have prevented the industry-wide adoption of these inventions. For instance, the conventional emulsified acid is well documented to exhibit high friction pressure, is cumbersome to prepare, and performance is sensitive to a multitude...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-204266-STU
...Abstract Abstract This study aims at evaluating the mechanical integrity and the changes in the pore system of illitic sandstone formations being treated with HF acid generated in-situ and thermochemical fluids ( TCF ). Firstly, the acid-generating fluids were injected separately inside...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201369-MS
... Abstract A potential enhanced oil recovery (EOR) technique is to inject alkali into a reservoir with a high total-acid-number (TAN) crude to generate soap in situ and reduce interfacial tension (IFT). The method may be cost-effective if the IFT can be lowered enough to cause significant...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201390-MS
... Abstract Hydrocarbon production enhancement by means of acid stimulation in Kazakhstan requires application of a more effective approach to address challenges associated with acid placement and reservoir contact in long pay zones of high-temperature carbonate reservoirs, thereby improving...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201465-MS
... Abstract In acid fracturing treatments, the goal is to create enough fracture roughness through differential acid etching on fracture walls such that the acid fracture can keep open and sustain a high enough acid fracture conductivity under the closure stress. The viscous fingering phenomenon...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-196150-MS
...-in. deep. The final hole is shown in Fig. 7 . Water Test #5 was performed with 0.097-in. nozzles (the current size of the acid tunneling BHA nozzles). The pressure differential was 3,500 psi; the casing pressure was 1,700 psi; and the pump rate was 1.9 bpm for 10 minutes. The tool did not penetrate...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 30–October 2, 2019
Paper Number: SPE-196097-MS
... a platform for designing ultra-low IFT solutions for reducing the capillary pressure and mobilizing the heavy oil. In this study, mixtures of organic acids and bases were formulated. Three different formulations were tested: (i) Ionic liquid (IL) formulation where bulk acid (4-dodecylbenzene sulfonic acid...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 24–26, 2018
Paper Number: SPE-191625-MS
... A literature survey carried over more than 500 wells in Middle Eastern, North Sea, Caspian, Southeast Asian and North American fields show that high-rate matrix acidizing techniques can be used to effectively stimulate carbonate reservoirs. Field post-stimulation pressure buildup and production...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 24–26, 2018
Paper Number: SPE-191649-MS
... cores of similar lithology were identified for geomechanical testing. Testing procedures were selected to evaluate susceptibility to fracture closure following hydraulic fracturing or acidization. A selection of cores were designated for triaxial compression testing to determine elastic and strength...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 24–26, 2018
Paper Number: SPE-191455-MS
... Since acids are products of biodegradation, they will change over time. Herman et al., [ 14 ] indicates that small cycloalkanes are more susceptible to microbial degradation than similar methylated components. Gao et al., [ 15 ] saw that a naphthenic acid blend can soften the interface...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 9–11, 2017
Paper Number: SPE-187444-MS
..., as detailed in Fig. 3 . The Lower Marrat was isolated with a bridge plug. The Middle Marrat was perforated and an acid fracturing treatment was performed across three perforation intervals as listed in Table 4 . Figure 3 Well B completion Design Table 4 Perforation Intervals for Well B...

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