An analysis of the uniformity of multi-fracture initiation based on downhole video imaging technology: A case study of Mahu tight conglomerate in Junggar Basin, NW China

Zang, Chuanzhen; Jiang, Hanqiao; Shi, Shengbao; LI, Jianmin; Zou, Yushi; Zhang, Shicheng; Tang, Gang; Yang, Peng

doi:10.1016/s1876-3804(22)60038-7

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…It includes four orthogonally mounted lenses able to simultaneously capture four video streams with full 360 • coverage of the wellbore. Compared with the previous generation of the single sideview lens rotary camera system, one primary benefit is a significantly reduced acquisition time as there is no longer a time-consuming requirement to individually locate perforations and then accurately position the camera at the required depth before rotating the lens to capture the perforation image at the correct phase [22]. As shown in Figure 6, it can be seen that when the perforation number per cluster is three, the perforation erosion area of cluster 6 in stage 7 and cluster 4 in stage 13 is small, indicating receiving a small amount of proppant.…”

Section: Analysis Of Perforation Erosion Measurementsmentioning

confidence: 99%

“…This part mainly verified whether multiple fractures can initiate simultaneously and propagate uniformly with the perforation number of eight per cluster. perforations and then accurately position the camera at the required depth before rotating the lens to capture the perforation image at the correct phase [22]. As shown in Figure 6, it can be seen that when the perforation number per cluster is three, the perforation erosion area of cluster 6 in stage 7 and cluster 4 in stage 13 is small, indicating receiving a small amount of proppant.…”

Section: Verification Of Optimized Perforation Schemementioning

confidence: 99%

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Investigation into the Perforation Optimization in Conglomerate Reservoir Based on a Field Test

Fan

Wang

et al. 2023

Processes

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The Mahu conglomerate reservoir is characterized by strong heterogeneity and the uneven stimulation of the horizontal lateral during hydraulic fracturing. The optimization of the perforation number per cluster is of great value for horizontal well multi-stage fracturing (HWMF) because the suitable perforation number not only promotes the uniform propagation of multiple fractures but also prevents excessive perforation erosion. In this work, a typical well in the Mahu conglomerate reservoir was selected, and a field test of optimizing the perforation number was carried out. The perforation schemes of three, five, and eight perforations per cluster were designed in nine fracturing stages, respectively. The wellhead pressure under different perforation schemes was compared and analyzed with the step-down flow rate test, and the optimal perforation number per cluster in the Mahu conglomerate reservoir was selected as eight. The theoretical calculation results show that eight perforations per cluster can generate the perforation friction of 5 MPa, sufficient to overcome the mechanical property differences among multiple clusters within one stage. The downhole video technology shows that the perforation erosion area is the most uniform with the case of eight perforations per cluster. Moreover, the optical fiber monitoring results show that the perforation number of eight per cluster can realize the simultaneous initiation and uniform propagation of six fractures or five fractures within one stage. This work is of great significance for the efficient development of the Mahu conglomerate reservoir through HWMF.

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Section: Analysis Of Perforation Erosion Measurementsmentioning

confidence: 99%

Section: Verification Of Optimized Perforation Schemementioning

confidence: 99%

Investigation into the Perforation Optimization in Conglomerate Reservoir Based on a Field Test

Fan

Wang

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

“…Currently, there are two main techniques for characterizing hydraulic fractures: direct observation and indirect observation. Direct observation techniques include microseismic observation [10,11], fiber-optic temperature/strain observation [12,13], and downhole imaging observation [14]. Among them, microseismic observation can only provide probable locations of rock shearing activity, and the accuracy of determining hydraulic fracture size is not high enough.…”

mentioning

confidence: 99%

Simulation Method and Feature Analysis of Shutdown Pressure Evolution During Multi-Cluster Fracturing Stimulation

He,

Zou,

et al. 2024

ENERGY

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Multistage multi-cluster hydraulic fracturing has enabled the economic exploitation of shale reservoirs, but the interpretation of hydraulic fracture parameters is challenging. The pressure signals after pump shutdown are influenced by hydraulic fractures, which can reflect the geometric features of hydraulic fracture. The shutdown pressure can be used to interpret the hydraulic fracture parameters in a real-time and cost-effective manner. In this paper, a mathematical model for shutdown pressure evolution is developed considering the effects of wellbore friction, perforation friction and fluid loss in fractures. An efficient numerical simulation method is established by using the method of characteristics. Based on this method, the impacts of fracture half-length, fracture height, opened cluster and perforation number, and filtration coefficient on the evolution of shutdown pressure are analyzed. The results indicate that a larger fracture half-length may hasten the decay of shutdown pressure, while a larger fracture height can slow down the decay of shutdown pressure. A smaller number of opened clusters and perforations can significantly increase the perforation friction and decrease the overall level of shutdown pressure. A larger filtration coefficient may accelerate the fluid filtration in the fracture and hasten the drop of the shutdown pressure. The simulation method of shutdown pressure, as well as the analysis results, has important implications for the interpretation of hydraulic fracture parameters.

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Study on Field Test and Plugging Simulation of the Knot Temporary Plugging Agent

Wu¹,

Shi²,

Zhang³

et al. 2022

Chem Technol Fuels Oils

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An analysis of the uniformity of multi-fracture initiation based on downhole video imaging technology: A case study of Mahu tight conglomerate in Junggar Basin, NW China

Cited by 6 publications

References 26 publications

Investigation into the Perforation Optimization in Conglomerate Reservoir Based on a Field Test

Investigation into the Perforation Optimization in Conglomerate Reservoir Based on a Field Test

Simulation Method and Feature Analysis of Shutdown Pressure Evolution During Multi-Cluster Fracturing Stimulation

Study on Field Test and Plugging Simulation of the Knot Temporary Plugging Agent

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