Using Dynamic Simulations to Optimize the Start-Up of Horizontal Wells and Evaluate Plunger Lift Capability: Horn River Shale Gas Trajectory-Based Case Study

2015 ◽  
Author(s):  
C.M. Nascimento ◽  
A. Becze ◽  
C.J. Virues ◽  
A. Wang
Keyword(s):  
Shale Gas ◽  
Horizontal Wells ◽  
Dynamic Simulations ◽  
Start Up

Development of a Dynamic Modeling Approach to Simulate a Segmented Distillation Column for Flexible Operation

2021 ◽  
Vol 5 (4) ◽  
pp. 66
Author(s):  
Bastian Bruns ◽  
Henrik Fasel ◽  
Marcus Grünewald ◽  
Julia Riese
Keyword(s):  
Distillation Column ◽  
Process Equipment ◽  
Feed Stream ◽  
Dynamic Simulations ◽  
Distillation Columns ◽  
The Past ◽  
Start Up ◽  
Time Required ◽  
Flexible Operation

The need for flexible process equipment has increased over the past decade in the chemical industry. However, process equipment such as distillation columns have limitations that significantly restrict flexible operation. We investigate a segmented tray column designed to allow flexible operation. The design consists of radial trays connected at the downcomer of each tray. Each segment can be operated separately, but depending on the capacity of the feed stream, additional segments can be activated or deactivated. The connection between the trays aims to transfer liquid from one stationary segment to the adjacent inactive segment, thereby reducing the time required for the start-up process. In a case study on the separation of methanol and water, we perform dynamic simulations to assess the reduction in the start-up time of inactive segments. The results confirm the advantages over standard tray designs. The segmented distillation column is a step towards improving the flexibility of separation operations.

Considerations for EHR section for the surgical specialist: Insights from a case study

2018 ◽  
pp. 1-2
Keyword(s):  
Electronic Health Records ◽  
Private Practice ◽  
Patient Relationship ◽  
Key Factors ◽  
Health Records ◽  
Start Up ◽  
Insurance Payment ◽  
System Selection ◽  
Office Procedures

Context: Surgical specialists have unique considerations when selecting and using electronic health records (EHRs). Aim: We sought to identify key factors and considerations during system selection and implementation for the surgical subspecialist. Case study: Insights from system selection and implementation for a start-up plastic surgery private practice were used to inform a broader set of principles for surgical subspecialists in private practice selecting and using EHRs. What can be learned: The nature of the provider-patient relationship is episodic and such as maintaining inventory, managing images, annotating images, documenting and billing in-office procedures, and integration of cash-based and insurance payment. Conclusion: Surgeons in private practice and as part of larger institutions can use insights from this case study to inform their own efforts in system selection and optimization for ongoing use.

Solidifying Mud Cake to Improve Cementing Quality of Shale Gas Well: A Case Study

2015 ◽  
Vol 8 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Jun Gu ◽  
Ju Huang ◽  
Su Zhang ◽  
Xinzhong Hu ◽  
Hangxiang Gao ◽  
...  
Keyword(s):  
Shale Gas ◽  
Calcium Silicate Hydrate ◽  
Drilling Fluid ◽  
Cement Slurry ◽  
Gas Well ◽  
Safety Requirements ◽  
Mud Cake ◽  
Gas Bearing

The purpose of this study is to improve the cementing quality of shale gas well by mud cake solidification, as well as to provide the better annular isolation for its hydraulic fracturing development. Based on the self-established experimental method and API RP 10, the effects of mud cake solidifiers on the shear strength at cement-interlayer interface (SSCFI) were evaluated. After curing for 3, 7, 15 and 30 days, SSCFI was remarkably improved by 629.03%, 222.37%, 241.43% and 273.33%, respectively, compared with the original technology. Moreover, the compatibility among the mud cake solidifier, cement slurry, drilling fluid and prepad fluid meets the safety requirements for cementing operation. An application example in a shale gas well (Yuanye HF-1) was also presented. The high quality ratio of cementing quality is 93.49% of the whole well section, while the unqualified ratio of adjacent well (Yuanba 9) is 84.46%. Moreover, the cementing quality of six gas-bearing reservoirs is high. This paper also discussed the mechanism of mud cake solidification. The reactions among H3AlO42- and H3SiO4- from alkali-dissolved reaction, Na+ and H3SiO4- in the mud cake solidifiers, and Ca2+ and OH- from cement slurry form the natrolite and calcium silicate hydrate (C-S-H) with different silicate-calcium ratio. Based on these, SSCFI and cementing quality were improved.

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