Study on shear slip mechanism of shale gas fractured formation

Zeng, Yanjun; Ding, Shidong; Chu, Zhongzhong; Ma, Guangjun; Yang, Zhi; Gao, Shuyang

doi:10.1080/10916466.2021.2013885

Cited by 5 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the increasing shortage of conventional oil and gas resources, unconventional sources, such as resources derived from shale oil and gas, have become important replacements worldwide. However, the process of drilling shale formations for oil and gas is prone to challenges such as wellbore instability ( Zeng et al, 2021 ; Zhang et al, 2022 ), which significantly prolongs the drilling cycle and adversely impacts the economic viability. Compared with water-based drilling fluids (WBFs), inverse emulsion oil-based drilling fluids (OBFs) have unique advantages in shale oil and gas drilling and are widely used ( Guo et al, 2012 ; Li et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Improvement of Emulsion Stability and Plugging Performance of Nanopores Using Modified Polystyrene Nanoparticles in Invert Emulsion Drilling Fluids

Huang

Xu²,

Wu³

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

Drilling fluid invasion and pressure transmission caused by the development of micropores and fractures in shale oil and gas formations are the major factors contributing to wellbore instability during drilling using oil-based drilling fluids (OBFs). In this study, a modified polystyrene latex (MPL) material was synthesized through emulsion polymerization and was characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), particle size analysis, scanning electron microscopy (SEM) observations, and contact angle testing. The influence of the MPL on the stability of a water-in-oil emulsion was analyzed via sedimentation observations and electrical stability tests. The effects of the MPL on the plugging mechanism of white oil and water-in-oil emulsions were evaluated using 0.1–1.0 μm micro-porous filtration films. The experimental results revealed that the MPL has a favorable thermal stability, with an initial thermal decomposition temperature of 363°C, a median particle size (D50) of 233 nm, and a three-phase contact angle of 103.5°. The MPL can enhance the sedimentation stability of an emulsion to a considerable extent and can improve the electrical stability (ES) of the emulsion, which is conducive to the stability of OBFs. Due to the deformability of the MPL, it has a wide range of adaptations for micro-scale pores and fractures. In both the white oil and water-in-oil emulsions, the MPL can reduce the filtration loss through microporous membranes with pore sizes of 0.1–1.0 μm to within 10 ml. This paper details the methodology of the synthesis of nanomaterials that can effectively plug a formation’s nanopores and fractures; thereby, stabilizing OBFs.

show abstract

Section: Introductionmentioning

confidence: 99%

Improvement of Emulsion Stability and Plugging Performance of Nanopores Using Modified Polystyrene Nanoparticles in Invert Emulsion Drilling Fluids

Huang

Xu²,

Wu³

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…With the increasing shortage of conventional oil and gas resources, unconventional sources, such as resources derived from shale oil and gas, have become important replacements worldwide. However, the process of drilling shale formations for oil and gas is prone to challenges such as wellbore instability [1,2], which significantly prolongs the drilling cycle and adversely impacts the economic viability. Compared with waterbased drilling fluids (WBFs), inverse emulsion oil-based drilling fluids (OBFs) have unique advantages in shale oil and gas drilling and are widely used [3,4].…”

Section: Introductionmentioning

confidence: 99%