Research and Application of Intelligent Casing Damage Prevention and Control System in Daqing Oilfield

Xing, Hui; Fei, Hong-Tao; Sun, Tao; Jixiang, Lin; Ma, Lihua; Jiao, Yang

doi:10.1007/978-981-15-2485-1_348

Cited by 1 publication

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“…Zou and Chai [20] established a similar two-dimensional model test-bed using similar materials for simulated formation and measured the displacement state of the simulated formation after mining using laser reflection. However, the above experimental equipment was mainly aimed at underground air excavation to surface deformation and cannot determine the role of regional formation pore pressure difference [21]. The slip of the horizontal weak structural surface was caused by the relative slip between layers inside the formation, which was quite different from the measurement purpose of this experiment.…”

Section: Introductionmentioning

confidence: 91%

Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory

Wang

et al. 2021

Geofluids

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In oilfield development, the pore pressure difference between adjacent areas leads to cracks and slipping in the weak structural surface layer, which triggers the shear failure of the casing. The formation slip involves a large range of formation, and its amount is not proportional to the size of the slipping rock mass, which conventional physical models cannot simulate. In this study, based on the abnormal similarity theory, we derived the similarity coefficients of mechanical parameters with different horizontal and vertical proportions. Furthermore, an experimental device for simulating the formation crack and slip under interregional formation pressure difference was developed. Through the experiments, we obtained slip conditions under different pressure differences between adjacent areas and different oil layers and fault surface depths. The study shows that the pore pressure difference between adjacent areas is the driving force of the formation slips. The slip zone is located in the middle of two abnormal pressure zones, and the distance between the adjacent areas can affect the slip range. The deep burial of the oil layer and shallow depth of the weak structural surface can trigger a more significant formation slip. The experimental method proposed in this paper provides an experimental device and method for understanding the formation of cracks and slips on weak structural surfaces. The experimental results provide a theoretical basis for the prevention of shear-type casing damage caused by formation slip.

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Section: Introductionmentioning

confidence: 91%

Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory

Wang

et al. 2021

Geofluids

View full text Add to dashboard Cite

show abstract

Research and Application of Intelligent Casing Damage Prevention and Control System in Daqing Oilfield

Cited by 1 publication

References 0 publications

Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory

Experimental Study on Formation Slip under Injection-Production Interregional Pressure Difference Based on the Abnormal Similarity Theory

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