Multilayer Pressure Containment Model and its Application in Deep Well Fractured Formation

Yang, Peng; Chen, Mian; Jin, Yan; Hou, Bing; Lu, Yunhu; Liang, Chuan; Zhu, Qi‐Zhi; Li, Yawei

doi:10.1007/s00603-012-0306-2

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Kang et al [16] reviewed the theories and methods for enhancing WP containment in subsurface formation, and determined the application environment of different theories. Inspired by the fundamental theories on rock fracture mechanics, Wang et al and Jia et al [17][18][19] determined the mechanisms for loss prevention that obstructs fracture propagation. Kumar et al [20][21][22] compared the effects of several loss prevention materials on fracture plugging amelioration.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis on Wellbore Enhancement in Fractured Formation through Tight Fracture Plugging by Drilling Fluid

Liu¹

2019

TI-IJES

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With the aim to prevent lost circulation and wellbore instability in drilling, this paper probes deep into the wellbore enhancement mechanism and tight fracture plugging (TFP), and simulates the performance of different drilling fluids. First, the wellbore enhancement mechanism of stress cage technique, which improves wellbore pressure (WP) containment, was investigated through ABAQUS finite-element modeling. It was found that WP containment could be enhanced by improving the drilling fluid plugging or propping of existing or new fractures, which curbs fracture propagation and increases hoop stress of the wellbore. Moreover, a physical model of the TFP zone was established, revealing the microscale plugging mechanism. On this basis, the author put forward a way to optimize the TFP drilling fluid and thus the WP containment: creating a TFP zones with a strong force chain network from the rigid and resilient particles of reasonable type and size distribution and fibers. In addition, a novel simulation device was designed to evaluate and simulate the dynamic plugging features of drilling fluid, and used to optimize the enhanced TFP formulas for drilling fluid at wedge fractures of different widths. The optimized formulas can improve the loss-prevention of drilling fluid and significantly boost the WP containment in subsurface formation.

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Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis on Wellbore Enhancement in Fractured Formation through Tight Fracture Plugging by Drilling Fluid

Liu¹

2019

TI-IJES

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“…The potential damage factors of the reservoir itself includes reservoir fluid properties, surface properties, the sensitivity of rock, temperature and pressure, which may be affected by environmental conditions resulting in the decrease of permeability [1]. External factors refer to the blockage of the seepage channel of the reservoir during various operations such as drilling, well cementing, fracturing and well repairing [2].…”

Section: Introductionmentioning

confidence: 99%

Composite Plugging Removal Technology and Application in Low Permeability Oilfield

Deng

Liu²,

Lu³

et al. 2019

DDF

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In an oilfield factory, the blocking and jam in Chang 2 reservoir is very serious. In recentyears, according to analysizing different plugging mechanism and optimizing acidizing formula, theoptimal plugging removal technology was formed suitable for the solution for the Chang 2 reservoirof oilfield factory. This plugging removal formula increases the efficiency radius, and increases thedosage of additives to protect the pipe, rod and pump from the precipitation such as Ca2+and Mg2+,which causes new pollution. Reasonable multiple technologies were designed, and low displacementmethod was used in the injection process, aiming at the characteristics of Chang 2 reservoir. Thismethod extends the time of plugging removal fluid staying around the well bore, which can eliminateplugging near well bore area effectively, and improve the permeability. DQ-1 composite pluggingremoval and other kinds of plugging removal methods have been used more than 50 times, and theeffect is remarkable, which made a positive contribution to stable production of the oilfield.

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Multi-layer Fracturing Technology and the Application in CK Oilfield to Enhance the Recovery

Deng

Liu

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Multilayer Pressure Containment Model and its Application in Deep Well Fractured Formation

Cited by 4 publications

References 15 publications

Theoretical and Experimental Analysis on Wellbore Enhancement in Fractured Formation through Tight Fracture Plugging by Drilling Fluid

Theoretical and Experimental Analysis on Wellbore Enhancement in Fractured Formation through Tight Fracture Plugging by Drilling Fluid

Composite Plugging Removal Technology and Application in Low Permeability Oilfield

Multi-layer Fracturing Technology and the Application in CK Oilfield to Enhance the Recovery

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