Casing deformation caused by fault and fracture sliding derived from fracturing has attracted growing attention. frequently occurs during the hydraulic process in Sichuan Basin. Although its mechanism been intensively studied, this issue is becoming increasingly severe demands immediate solutions, especially shale gas blocks of Changning-Weiyuan-Zhaotong. The present study summarizes analyzes r...

Extensive slug-test experiments have been performed at the Hydrogeological Experimental Site (HES) of Poitiers in France, made up of moderately fractured limestones. All data are publicly available through the "H+" database, developed within the scope of the ERO program (French Environmental Research Observatory, http://hplus.ore.fr). Slug-test responses with high-frequency (> 0.12 Hz) oscillat...

Ensuring proper punctuation and letter casing is a key pre-processing step towards applying complex natural language processing algorithms. This especially significant for textual sources where are missing, such as the raw output of automatic speech recognition systems. Additionally, short text messages micro-blogging platforms offer unreliable often wrong casing. survey offers an overview both...

The tightness of the casing-rock formation interface is one most important elements drilling and cementing jobs. In absence required tightness, there a risk gas migration directly to ground, groundwater or atmosphere. order eliminate this type uncontrollable unfavorable flows, casing column sealed with cement slurry in annular space beyond casing. Cement displaces mud present space, although ca...

Abstract This contribution focuses on the combined analysis of mistuning and unilateral blade-tip/casing contacts. A two-dimensional (2D) phenomenological finite element (FE) model an aircraft engine fan stage is considered. It reduced by means Craig–Bampton component mode synthesis method contact treatment relies a Lagrange multiplier algorithm within explicit time-integration scheme. Blade-ti...

Abstract Cement bond logs (CBL) and variable density log (VDL) are one of the vital logging techniques used to evaluate cement-casing-formation bonds before well testing or execution production operation in well. These also crucial during workover maintain integrity The provide a clear view quality cement with casing formation. microannulus other deviations bonding between formation recorded us...

In this work, the wellhead axial movement of a subsea well was predicted with previously presented multi-string model modified to account for possible buckling well’s surface casing. This represented structural casing nonlinear spring that considers casing-soil interaction using t-z curves hysteretic behavior. addition, modeled incorporates deformation when effective force is compressive and ma...