Summary In naturally fractured reservoirs, complex fracture systems can easily develop along a horizontal wellbore during hydraulic fracturing. the systems, multiple, discrete secondary fractures are connected to multiple-fractured well (MFHW). Because of complexity, most studies about performance forecast such MFHWs highly depend on numerical simulators. this paper, new semianalytical approach is proposed overcome challenge analyze pressure behavior in complex-fracture systems. First,...

Despite BGP's critical importance as the de-facto Internet inter-domain routing protocol, there is little understanding of how BGP actually performs under stressful conditions when dependable most needed. In this paper, we examine behavior during one period, Code Red/Nimda attack on September 18, 2001. The was correlated with a 30-fold increase in update messages at monitoring point which peers number service providers. Our examination event concludes that exhibited no significant...

This paper presents a detailed study of BGP Multiple Origin AS (MOAS) conflicts observed in the Internet. A MOAS conflict occurs when particular prefix appears to originate from more than one AS. We analyzed data archived routing tables over 1279 days. Most were short-lived, lasting only small number The potential causes for and impact on fault-tolerance are discussed detail.

This paper presents a new mechanism for improving the convergence properties of path vector routing algorithms, such as BGP. Using route's information, we develop two consistency assertions algorithms that are used to compare similar routes and identify infeasible routes. To apply these in BGP, mechanisms signal failure/policy withdrawal, traffic engineering provided. Our approach was implemented deployed BGP testbed evaluated using simulation. By identifying ignoring routes, achieved...

Environment-responsive fluorescent materials have been widely studied in the determination and utilization of different environmental factors. Particularly, it is still challenging to develop multifunctional environment-friendly pH-responsive based on biomass renewable polymers. In this study, a intelligent color-changing film cellulose nanofibers (CNFs)/polyvinyl alcohol (PVA) incorporated with anthocyanin (Ant) extracted from Lycium ruthenicum fruit amino-functionalized carbon dots...

Polymer flooding is a critical enhanced oil recovery technique; however, the development of polymer channeling along dominant channels during its later stages can adversely affect process by increasing comprehensive water cut and dispersing remaining oil, thereby diminishing benefits. This study aims to address this challenge investigating identification methods distribution patterns in inform optimize strategy. Through series experiments, we analyzed how factors such as permeability,...

This article provides an overview of low-permeability reservoir development technologies, including carbon dioxide injection, nitrogen air natural gas water injection (unstable advanced injection), water–gas alternating and hydraulic fracturing (hydraulic fracturing, repeated fracturing). These technologies have their own strengths weaknesses in improving crude oil recovery are significantly constrained by characteristics. uses specific cases such as the increase CO2 pressure Yaoyingtai...

<title>Abstract</title> Gas flooding, as a key enhanced oil recovery (EOR) technology, has seen extensive research on its miscible mechanisms and displacement characteristics. However, dynamic monitoring analysis of realistic phase-state distribution in subsurface fluids during gas flooding remain insufficient. This study focuses gas-crude interaction by developing three-zone radial composite well-testing model that incorporates interfacial skin effects power-law variations physical...

Network measurement has shown that a specific IP address prefix may be announced by more than one autonomous system (AS), phenomenon commonly referred to as Multiple Origin AS, or MOAS. MOAS can due either operational need support multi-homing, false route announcements configuration implementation errors, even intentional attacks. Packets following such bogus routes will dropped in the case of an attack, delivered machine attacker's choosing. The paper presents protocol enhancement BGP...

Summary Many researchers are currently seeking conventional geological sequestrations for carbon dioxide (CO2) storage, including saline aquifers, depleted hydrocarbon reservoirs, and unminable coal seams. Only a few have looked into depleted-shale formations possible CO2 sequestration because of safety economic reasons. To improve this situation, many measures should be taken. First foremost, it is great significance to find method estimate the CO2-storage capacity in shale. In paper, new...

Internet connectivity is defined by a set of routing protocols which let the routers that comprise backbone choose best route for packet to reach its destination. One way improve security and performance routinely examine data. In this case study, we show how interactive visualization Border Gateway Protocol (BGP) data helps characterize behavior, identify weaknesses in could potentially cripple Internet, as well detect explain actual anomalous events.

The Internet and its associated global routing table continues to grow with time. Will the current infrastructure be able scale itself sustain such growth? Over past several years, many efforts have been devoted address this important question. This paper presents a unique view from network operator's perspective. We first clarify definition of scaling problem in practical terms by providing relevant background information. point out reality issues that, if overlooked, may impede adoption...

Summary In this paper, we propose a new model for pressure-transient analysis in multiple-fractured horizontal wells (MFHWs) with consideration of pressure drop along the wellbore. To make physical better understood, whole formation is divided into three parts: (1) reservoir, (2) fracture, and (3) With incorporating frictional acceleration drops, mathematical finite-conductivity well (FCHW) developed. Newton-Raphson iterations are used to solve obtain transient-pressure solutions MFHW. Model...

The precondition of well testing interpretation is to determine the appropriate model. In numerous attempts in past, automatic classification and identification plots have been limited fully connected neural networks (FCNN). Compared with FCNN, convolutional network (CNN) has a better performance domain image recognition. Utilizing newly proposed CNN, we develop new approach evaluate type curves. field data tight reservoirs such as Ordos Basin exhibit various test models. With those models,...