Research on optimization of engineering parameters of effective action distance of multi-stage alternating injection acid etching

Dan Li; Le He; Yong Ren; Xinjie Xie; Ying Li; Jun Li; Xu Han

doi:10.54097/b6evf624

Authors

Dan Li
Le He
Yong Ren
Xinjie Xie
Ying Li
Jun Li
Xu Han

DOI:

https://doi.org/10.54097/b6evf624

Keywords:

List the; keywords covered; in your paper.

Abstract

This study calibrated the numerical simulation model by using indoor experiments to measure experimental data related to conductivity, acid rock reaction kinetics and acid fluid loss, and combined it with the numerical simulation model to calculate the multi-condition acid flow under multi-physics coupling . The effective action distance of the acid liquid is finally formed, which can be used at 200℃ and 250℃. The effective action distance of the acid liquid is related to the amount of acid liquid and the number of acid liquid injection stages. A set of quick diagrams that can be quickly applied to multi-stage Alternate injection process design and optimized workflow. After calculation, it is concluded that: for the 200℃ formation, it is recommended that the total amount of acid used in the level 3 injection process should be more than 400m3; if level 2 injection is used, taking into account both cost and benefit, the total acid amount of 300m3 can be close to the same amount of acid in level 3 The effective range of the injection. For the 250℃ formation, it is not recommended to use a solution with small liquid volume and multiple stages. If level 3 injection is used, it is recommended that the acid dosage be more than 500m3; if level 2 injection is used, taking into account both benefits and costs, it is recommended to use 400m3 acid liquid . Injection can obtain an effective distance similar to that of level 3 injection with the same amount of acid.

Downloads

Download data is not yet available.

References

Yang W ,Jian Y ,Tianyu W , et al.Visualization experiment of multi-stage alternating injection acid fracturing[J].Energy Reports,2022,89094-9103.

Dong R, Wheeler M F, Su H, et al. Modeling acid fracturing treatments with multi-stage alternating injection of pad and acid fluids[C]//SPE Reservoir Simulation Conference?. SPE, 2021: D011S011R004.

Jiankun L I U, Tingxue J, Linbo Z, et al. Multi-stage alternative acid fracturing technique in carbonate reservoirs stimulation[J]. Petroleum Drilling Techniques, 2017, 45(1): 104-111.

Al-Ameri A, Gamadi T. Optimization of acid fracturing for a tight carbonate reservoir[J]. Petroleum, 2020, 6(1): 70-79.

Mou J, Hui X, Wang L, et al. Experimental investigation on tool-free multi-stage acid fracturing of open-hole horizontal wells by using diversion agents[C]//SPE International Hydraulic Fracturing Technology Conference and Exhibition. OnePetro, 2018.

Ueda K, Zhang W, Zhu D, et al. Evaluation of acid fracturing by integrated pressure analysis and 3D simulation: A field application for multi-stage stimulation in horizontal wells[C]//SPE Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2016: D011S001R007.

Shenyan G O U, Shibin W, Linyao G U O, et al. Influence of Alternate Injection Process on Conductivity of Acid-Etched Fractures in Deep Marine Carbonate Rocks[J]. Drilling & Production Technology, 2023, 46(2): 94.

Franco C A, Solares J R, Al-Shammari N S, et al. Post-stimulation results and analysis of highly successful multi-stage acid fracturing campaign performed in tight gas carbonate formations in Saudi Arabia[C]//SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition. SPE, 2010: SPE-136923-MS.

Zhang W. Evaluation of Multi-Stage Acid Fracturing Treatment in Deep Carbonate Formation[D]. , 2015.

Guizada P, Harbi A, Khanferi R. A synopsis on completion efficiency for multi stage acid fracturing technology in tight carbonates formations[C]//SPE Europec featured at EAGE Conference and Exhibition?. SPE, 2017: D042S016R003.