... ABSTRACT: Different scholars had carried out much research on rock damage during perforation by numerical simulation or experiment, but they had not considered the influence of metal jet morphological feature on rock damage during perforation. In this paper, a numerical calculation model...

... show that under low horizontal stress difference coefficient, spiral perforation is beneficial to the initiation of multi-hole fracture, but the fracture near the wellbore is seriously distorted. Directional perforation under high horizontal stress difference coefficient is favorable for hole...

... ABSTRACT: "Fracturing" mechanisms and associated injectivity impairment were investigated by means of large-scale laboratory experiments on sand packs built from synthetic sands and highly unconsolidated downhole core materials. Various fines were mixed into the sands around the perforations...

... ABSTRACT: Multi-cluster fracturing technology of horizontal wells is the main technical method for effective and economic development in tight reservoirs. The optimization of perforation location is the key to the simultaneous initiation of multiple clusters. Perforation locations are usually...

... quality (e.g., length, type, and number). In addition, repetitive application of shock waves in wellbore is investigated. Pulsed fracturing in the cased and perforated wellbore is compared with open-hole situation. This work examines the effect of confining stresses and stress anisotropy. The shock wave...

... fluid distribution, perforation erosion, and temporary plugging effects based on the Finite Element Analysis. This element can be easily coupled with finite element models to achieve multi-fracture propagation simulation. The element test shows the numerical solution is consistent with the analytical...

... perforation-like entries azimuthally distributed in a 60-degree phasing con- guration. Experiment LB2 showed a more complex initiation-propagation pattern than LB1 with non-planar transverse fractures initiating at multiple perforation locations for the top stage, leading to a primary fracture merged...

... constant-rate and stepwise-rate, were used to initiate three clusters of perforation. It was observed that under case of constant-rate injection, two fractures initiate from perforations and subsequently intersect with each other. While a T-shaped fracture is created by cyclic constant-rate injection...

..., video-based perforation imaging, fiber optic distributed acoustic sensing (DAS), and distributed temperature sensing (DTS) data (Ugueto C et al., 2016; Cramer et al., 2019; Lorwongngam et al., 2020). Distributed fiber optic technology consists of a fiber cable with an intrinsic sensor that measures...

... years of production. The sanding risk and sand volume rate is expected to increase with further depletion potentially requiring well intervention for existing producers and active sand control for newly drilled and cased and perforated wells. The analysis also indicated negligible field life sanding...

... ABSTRACT: Well completions, either cased hole gravel packed or cased hole frac packed, often suffer significant productivity decline during hydrocarbon production. In these completions, the perforations are intended to be packed with gravel or proppant, which provides the necessary support...

... this preferred orientation, the effective length of the lateral diminishes, which means that the same SRV could be reached with a shorter well at the optimum orientation. Finally, a computational code for a perforated well in an arbitrary direction was implemented to calculate the breakdown pressure for every...

... monitoring wellbore integrity drillstem testing waterflooding drillstem/well testing sand control completion installation and operations khaksar early field life proceedings perforation depletion prediction horizontal well case study wellbore design upstream oil & gas geomechanical...

... fracturing mechanism in poro-elastic rock with finite element displacement and finite volume pressure discretization. Fracturing fluids pumped from the wellhead are modeled using compressible pipe flow with frictional pressure loss. Wellbore is connected to fractures through orifice perforations. Fluid flow...

... perforation test 1 hydraulic fracture borehole notch 1. INRODUCTION In hydraulic fracturing, breakdown pressure is the peak fluid pressure at which a borehole fractures or breaks down. For a circular borehole with two symmetrical opposing cracks or notches at a certain orientation, theoretical...

... ABSTRACT: This paper presents an analytical model to calculate the hydraulic fracture initiation pressure from an arbitrarily oriented wellbore in an elastic medium with and without perforations and investigates the competition between axial and transverse fractures. The model predicts...

... ABSTRACT: Well completion is the process of borehole preparation for the production. Cased and perforated slotted liner completion is used extensively as the completion configuration in the wells drilled into conventional sand formation reservoirs. Such completions may exhibit lower...

... treatment depends on contacting a new reservoir that has not been previously drained, which might be caused by widely spaced perforation clusters or induced fractures. Successful refracturing can be accomplished by treating those sections to increase reservoir contact. In following sections, a single well...

...ABSTRACT: Shaped charge perforation (SCP) completion is the main way to develop low permeability sandstone gas reservoirs in oilfield. Accurate understanding and evaluation of perforation completion effect play significant roles in optimizing the development of tight sand reservoirs. To this end...

... and Gravel Packing (Frac&pack) has been an effective method for preventing onset sand production problems, there are other methods for well completion that include: perforating, placing gravel packs, acidizing, fracturing and setting production tubing and packers. The goal of these operations is to obtain...