... of vibration drag-reduction tools are closely related to the drag reduction efficiency. At present, the parameter design of vibration drag reduction is mainly based on field experience but lacks a set of effective theoretical methods. To solve this problem, the strong nonlinear effect of friction force...

.... Because the commonly used mechanical specific energy (MSE) has a negative relationship with cutting efficiency, therefore, the ratio between the volume of rock cuttings and energy consumed on rock cutting process was calculated to represent the cutting efficiency or namely aggressiveness, so as overall...

... et al., 2020), and nuclear waste repositories (Nara et al., 2010). hydraulic fracturing relaxation experiment journal laboratory upstream oil & gas relaxation experiment reservoir characterization multistage relaxation specimen efficiency propagation ae sensor deformation...

... parameters on the rock-breaking efficiency. Studies have shown that the rock-breaking efficiency of the non-planar cutter is better than that of the planar cutter; the rock-breaking efficiency of 16 mm diameter cutter is better than that of 19 mm diameter cutter; as the back dip angle of the PDC cutter...

... shape, however, the large well spacing may affect the cavity forming efficiency. 1. INTRODUCTION There are more than 800 underground gas storage facilities in the world, and the total capacity is close to 450 billion cubic meters (Caineng Zou et al. 2020). Among them, salt cavern gas storage...

... ABSTRACT: It is one of the key difficulties that extremely thick gravel layer distributed in the shallow and middle layers in the Tarim Oilfield. The maximum thickness of the gravel layer is more than 5000m, which seriously restricts the efficient exploration and development of Piedmont tight...

.... INTRODUCTION Since PDC bit was introduced into the oil and gas drilling industries in 1970s by GENERAL Electric of the United States, it has been widely used in drilling soft to medium-hard formations with high rock-breaking efficiency and long service life (Yang and Guo 2018). However, in the drilling...

... equipment developed in the laboratory to validate BPI, using dome-shaped diamond percussion inserts on granite rock samples. Efficiency estimates and volume removed by impacting the rock surface at different locations while moving away from the center of the crater were determined through these experiments...

... method, the influence of capillary effects can be effectively reduced, and the measurement accuracy is improved by 30%.. With the increase of injection production cycles, the gas-phase relative permeability decreases and the water-phase relative permeability increases, meanwhile, reduced efficiency...

... are usually interpreted manually with associated low efficiency and high cost, and to overcome these deficiencies here we propose a high performance combined de-noising procedure based on the median filter and deep learning techniques. We investigate the use of a convolutional neural network (CNN) method...

... ABSTRACT: The efficient harvest of geothermal energy, especially geothermal electricity generation, has been an international research hotspot and challenge for decades. However, the conventional geothermal exploitation technologies with water extraction bring on many issues such as high...

... temperatures (25-480°C). Besides, the effects of high-pressure water jet on the rock failure process were studied as well, which is of great importance to improve the efficiency of geothermal exploitation. The cutting force and the mechanical specific energy (MSE) were used to estimate the efficiency of rock...

... particle migration trajectory and the number of particles escaped from the annulus under different planes and different particle sizes were studied and the laws of influence of hydraulic parameters such as cavity diameter and displacement and rotational speed on flushing efficiency were analyzed. Finally...

... ABSTRACT: The plugging zone is prone to fail in curing lost circulation treatment. The understanding of the microscale phenomena can improve the plugging efficiency of Lost Circulation Material in fractured reservoirs. Thus, the micro-processes of particle migration and plugging were studied...

... ABSTRACT: In this work, an one-way CFD-DEM coupling method was introduced to analyze structural parameters of prepacked gravel screens (PPGS). In order to improve the anti-plugging capacity of the PPGS, punched slot width on the outer protective screen, gravel size, and packing efficiency...

... effectiveness of a hydraulically fractured well can be monitored with fiber installed in the treatment well (In-well monitoring) or with fiber installed in offset wells (Cross-well monitoring). In-well fiber monitoring is used to understand the perf cluster efficiency, fluid allocation, and cross-stage fluid...

... sediments are considered. The evolving behavior over time such as the gas production rate, hydrate saturation and pressure, are captured and investigated for the reservoirs, which shows that the rate of hydrate dissociation in reservoir and the efficiency of gas production in the wellbore in the case...

..., and productivity decline. The effect of proppant packing efficiency, i.e., the fraction of perforation volume filled, on productivity decline was investigated in hollow cylinder sand production tests on two different types of sandstone. The experimental results show that lower packing efficiency may lead...

... experiments would provide a theoretical basis and guide the field operation for the efficient far-field diversion fracturing of unconventional reservoirs. 1. INTRODUCTION Temporary plugging and diversion is a broad concept, which was originally applied in matrix acidizing of carbonate reservoir to achieve...

... of the width of the cement crack was also investigated using 0.5, 3.2, and 6.75 mm. Results show that polymer gel propagated across fractures like a piston with no gravity effect and with angle with gravity effect. Blocking efficiency to water flow is controllable and it can be increased if polymer gel...