Optimization Process Maximizes Financial, Environmental Benefits in LNG Breakwater

2021 ◽  
Vol 73 (09) ◽  
pp. 55-56
Author(s):  
Chris Carpenter
Keyword(s):  
Soft Soil ◽  
Phase 1 ◽  
Gas Production ◽  
Environmental Benefits ◽  
Large Area ◽  
Saint Louis ◽  
Offshore Technology ◽  
Mound Structure ◽  
Deep Boreholes ◽  
Caisson Breakwater

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 31284, “Greater Tortue Ahmeyim Project for BP In Mauritania and Senegal: Breakwater Design and Local Content Optimizations,” by Alexis Replumaz, Yann Julien, and Damien Bellengier, Eiffage Génie Civil Marine, prepared for the 2021 Offshore Technology Conference, originally scheduled to be held in Houston, 4–7 May. The paper has not been peer reviewed. Copyright 2021 Offshore Technology Conference. Reproduced by permission. During summer 2017, the authors’ company was invited by BP to bid for the construction of a concrete caisson breakwater protecting an offshore liquefied natural gas (LNG) floating terminal at a water depth of 33 m on the Mauritanian/Senegalese maritime border. As a result of subsequent front-end engineering design (FEED) studies, including 3D model testing, the company was able to reduce the amount of concrete required by 40% compared with the initial design, leading to financial and environmental benefits. Introduction The BP Tortue development comprises a subsea production system tied back to a pretreatment floating, production, storage, and offloading (FPSO) unit, which transfers gas to a near-shore hub for LNG production and export. Phase 1 will provide sales gas production and domestic supply and will generate approximately 2.5 mtpa of LNG to Mauritania and Senegal. The Phase 1 FPSO, in 100–130 m of water, will process inlet gas from the subsea wells located across several drill centers by separating condensate from the gas stream and exporting conditioned gas to a hub, where LNG processing and export will occur. The hub, 10 km from shore, comprises a breakwater to protect marine operations, including LNG processing and carrier loading. A single floating LNG vessel will condition the gas for LNG export. Hub construction began early in 2019 and should be completed in 2021 for a first-gas target in 2022. The breakwater design was conceived during the bidding stage of the project at the end of 2017 by proposing an alternative design for the breakwater adapted to project-specific conditions and regional facilities. The design has been improved continuously and optimized during the FEED stage based on a collaborative approach between the client and the contractor. Client Preliminary Design Optimizations During pre-FEED and bidding stages, the client performed an intensive geotechnical campaign based on several shallow and deep boreholes and a large-area geophysical survey. In water depths greater than 18 m along the maritime boundary between Mauritania and Senegal, a significant layer of soft soil exists, except around the outcrop located on the west side (10–11 km offshore in approximately 33 m of water). Although rock quantities could be slightly higher in the western location, the reduction of the dredging quantities and the reduction of the effect on the nearby coastal community of Saint Louis (lighting, noise, and vessel traffic) led to selection of this location for the hub terminal. The initial breakwater type was a rubble-mound structure. However, a composite breakwater (caisson on berm foundation) allowed for optimization of dredging and rock quantities. The change in breakwater type allowed a rock-quantity drop from 5.8 million to 1.1 million m3.

Pre-incubation of microbes for use in the Pressure Transducer Technique (PTT) of feed evaluation - effect of basal feed composition

1996 ◽  
Vol 1996 ◽  
pp. 220-220
Author(s):  
D M Harris
Keyword(s):  
Pressure Transducer ◽  
Phase 1 ◽  
Barley Grain ◽  
Gas Production ◽  
Lag Phase ◽  
Feed Composition ◽  
Grass Silage ◽  
High Starch ◽  
Effect Of The Composition ◽  
High Cellulose

The use of the Pressure Transducer Technique (PTT) to evaluate feed degradation as described by Theodorou et al (1994) recognises the presence of a lag phase (1-2h) after introducing the microbial innocula to the feed under investigation. Previous work has shown that this can be reduced by incubating the microbes with a basal feed for 24h prior to the addition of a test feed. This work considered the effect of the composition of this basal feed.Four basal mixtures, Grass silage/conc(G), Hay/cone (H), Maize silage/conc: (M), Whole crop wheat/caustic wheat/cone (W) were prepared plus two mixtures based on purified nutrients to give high Starch (St) and high Cellulose (Ce) contents. 20ml strained, homogenised bovine rumen liquor was added to bottles containing 180ml of media and 1.5g DM of each basal mixture. After 24h of vented incubation at 39°C 1g DM of test feed, (either barley grain or straw both milled to 1 mm) was added and gas production measured at decreasing frequencies over the next 72h. Cumulative gas production at 72h were calculated (Table 1).

Nanotechnology Helps Decrease Pressure, Increase Injection in Offshore China Oil Field

2021 ◽  
Vol 73 (09) ◽  
pp. 58-59
Author(s):  
Chris Carpenter
Keyword(s):  
Water Injection ◽  
Injection Pressure ◽  
Gas Production ◽  
Oil Field ◽  
Water Flooding ◽  
Injection System ◽  
Bohai Bay ◽  
Reservoir Properties ◽  
Positive Effects ◽  
Offshore Technology

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 30407, “Case Study of Nanopolysilicon Materials’ Depressurization and Injection-Increasing Technology in Offshore Bohai Bay Oil Field KL21-1,” by Qing Feng, Nan Xiao Li, and Jun Zi Huang, China Oilfield Services, et al., prepared for the 2020 Offshore Technology Conference Asia, originally scheduled to be held in Kuala Lumpur, 2–6 November. The paper has not been peer reviewed. Copyright 2020 Offshore Technology Conference. Reproduced by permission. Nanotechnology offers creative approaches to solve problems of oil and gas production that also provide potential for pressure-decreasing application in oil fields. However, at the time of writing, successful pressure-decreasing nanotechnology has rarely been reported. The complete paper reports nanopolysilicon as a new depressurization and injection-increasing agent. The stability of nanopolysilicon was studied in the presence of various ions, including sodium (Na+), calcium (Ca2+), and magnesium (Mg2+). The study found that the addition of nanomaterials can improve porosity and permeability of porous media. Introduction More than 600 water-injection wells exist in Bohai Bay, China. Offshore Field KL21-1, developed by water-flooding, is confronted with the following challenges: - Rapid increase and reduction of water-injection pressure - Weak water-injection capacity of reservoir - Decline of oil production - Poor reservoir properties - Serious hydration and expansion effects of clay minerals To overcome injection difficulties in offshore fields, conventional acidizing measures usually are taken. But, after multiple cycles of acidification, the amount of soluble substances in the rock gradually decreases and injection performance is shortened. Through injection-performance experiments, it can be determined that the biological nanopolysilicon colloid has positive effects on pressure reduction and injection increase. Fluid-seepage-resistance decreases, the injection rate increases by 40%, and injection pressure decreases by 10%. Features of Biological Nanopolysilicon Systems The biological nanopolysilicon-injection system was composed of a bioemulsifier (CDL32), a biological dispersant (DS2), and a nanopolysilicon hydrophobic system (NP12). The bacterial strain of CDL32 was used to obtain the culture colloid of biological emulsifier at 37°C for 5 days. DS2 was made from biological emulsifier CDL32 and some industrial raw materials described in Table 1 of the complete paper. Nanopolysilicon hydrophobic system NP12 was composed of silicon dioxide particles. The hydrophobic nanopolysilicons selected in this project featured particle sizes of less than 100 nm. In the original samples, a floc of nanopolysilicon was fluffy and uniform. But, when wet, nanopolysilicon will self-aggregate and its particle size increases greatly. At the same time, nanopolysilicon features significant agglomeration in water. Because of its high interface energy, nanopolysilicon is easily agglomerated, as shown in Fig. 1.

scholarly journals Environmental benefits of modern power system and clean energy

2019 ◽  
Vol 107 ◽  
pp. 02006
Author(s):  
Vedaste Ndayishimiye ◽  
Xu Zhang ◽  
Deborah Nibagwire ◽  
Patrobers Simiyu ◽  
Giovanni Dushimimana ◽  
...  
Keyword(s):  
Transport System ◽  
Energy Demand ◽  
Industrial Development ◽  
Clean Energy ◽  
Energy System ◽  
Gas Production ◽  
Environmental Benefits ◽  
Electric Transport ◽  
Coal Consumption ◽  
Sustainable Energy System

Nowadays, the world is at a critical moment of facing serious environmental and economic problems. A very large number of people in developing countries is exposed to dangers associated with flammability and toxicity of traditional source of energy while others in industrialized countries are facing the effects of atmospheric air pollution and green house (GHG) gas emission .Despite the global reforestation policies, despite latest remarkable increase in renewable energy and natural gas production, there is still a problem of domination fuel and coal consumption. This paper explored the effects of rapid economic growth, industrial development on climate. Additionally the effects of continuous exponential population growth, a fast increase of energy global energy demand, conventional transport system on carbon and GHG emission have discussed. Finally the paper revealed how modern smart electricity system with sustainable energy system and electric transport system contribute to the reduction of hazardous emission.

A Study of Stabilizer for Saline Sludge

2011 ◽  
Vol 477 ◽  
pp. 185-189 ◽  
Author(s):  
Zhan Guo Li ◽  
Yin Cheng ◽  
Xin Huang ◽  
Xiao Ming Shen
Keyword(s):  
Comparative Analysis ◽  
Portland Cement ◽  
Saline Soil ◽  
Soft Soil ◽  
Large Area ◽  
Soil Stabilizer ◽  
Stabilized Soil ◽  
Stabilization Effect ◽  
Tianjin Binhai New Area

There is large-area saline sludge which should be stabilized in China. However when cement is used as a stabilizer the strength and stabilization effect on the soil is relatively poor. In this paper, In this paper Portland cement PC is compared to a soft soil stabilizer A developed by the authors for use in stabilizing chloride saline soil from the Tianjin Binhai New Area. The strength of stabilized soil was tested by comparative Analysis, and XRD and SEM tests were used to analyze the hydrate types in stabilized soil. Preliminary tests results suggest that the salts present in hydraulic sludge and stabilizer A were able to react and formed a new hydrate----- Ca4Al2Cl2O6 • 10H2O which cannot be produced by cement alone, and which can greatly increase strength of stabilized soil.

Test Study on Effective Reinforcement Depth of Dynamic Compaction and Filling Replacement

2011 ◽  
Vol 368-373 ◽  
pp. 2550-2553 ◽  
Author(s):  
Wei Li ◽  
Chun Xiao Zhang ◽  
Peng Xiang Sun
Keyword(s):  
Bearing Capacity ◽  
Low Cost ◽  
Soft Soil ◽  
Dynamic Compaction ◽  
Reinforcement Effect ◽  
Large Area ◽  
Remarkable Effect ◽  
Ground Treatment ◽  
Test Study ◽  
Effective Reinforcement

Filling replacement combined with dynamic compaction is a very effective method to preprocess the soft soil to obtain larger bearing capacity. That not only has remarkable effect to improve soil bearing capacity, but also has some advantages, such as quick construction, simple equipment, low cost and so on. And that is appropriate for large area ground treatment engineering. The purpose of ensuring the reinforcement effect and saving the project cost, and providing references for the similar projects can be achieved through the test study on effective reinforcement depth of dynamic compaction and filling replacement.

Metal Line Interconnects Produced by Means of Printable Copper Precursor Solutions

2006 ◽  
Author(s):  
Manish Tiwari ◽  
Constantine Megaridis ◽  
Prodyut Majumder ◽  
Christos Takoudis ◽  
John Belot ◽  
...  
Keyword(s):  
Cost Savings ◽  
Metal Films ◽  
Environmental Benefits ◽  
Large Area ◽  
Metal Line ◽  
Printed Circuits ◽  
Damascene Process ◽  
Planar Substrate ◽  
Wide Range ◽  
Printing Techniques

Patterned metal films are essential to a wide range of applications, from printed circuits and thin film displays in large area electronics, to electrodes in biomedical implants. Current fabrication techniques are usually photolithographic, and rely on either patterning a blanket metal film or patterning a planar substrate into which the metal is deposited, followed by polishing away excess metal (the "Damascene" process). However, photolithographic techniques are expensive and more suitable for relatively small substrates. Conventional printing techniques such as inkjet, flexographic, offset and screen printing for both printable metal films and emergent organic elements, have lower resolution, but offer advantages of flexibility, overall cost savings, scalability to large substrates or those with complex topologies. In addition, these methods have environmental benefits [1].

783 Scar Revisions: Are We Asking the Right Questions?

2020 ◽  
Vol 41 (Supplement_1) ◽  
pp. S225-S226
Author(s):  
Natalia Ziolkowski ◽  
Jennifer Zuccaro ◽  
Joel Fish
Keyword(s):  
Gold Standard ◽  
Clinical Care ◽  
Phase 1 ◽  
Psychosocial Impact ◽  
Inclusion Criteria ◽  
Large Area ◽  
Specific Patient ◽  
Scar Revision ◽  
Patient Reported ◽  
Time Since Injury

Abstract Introduction Scars have wide-ranging effects on the individual and as such, many seek to have their scars. Currently, there is no gold standard for conducting scar revision consults. Scar-specific patient-reported outcome measures (PROM) are questionnaires created by individuals with scars and encompass all concepts of interest (COI) important to them. PROMs can be used for quality improvement (QI) initiatives to determine if all COI are being asked of patients. SCAR-Q, a new, internationally validated, scar-PROM measuring COI related to scar appearance, symptoms and function, and psychosocial impact was used. The purpose of this QI study was to determine if COI important to patients with scars are routinely asked during scar revision consults. Methods All scar revisions consults from July 1, 2017 to June 30, 2019 were reviewed at a single pediatric hospital using an electronic database. This study represents Phase 1 of the QI study approved by the institution and follows Model for Improvement methodology. Inclusion criteria were: patient aged ≥8 years, had a cutaneous scar, and speak English. Demographic information included: gender, age; and items related to the patient’s scar including etiology, time since injury, location, interventions; COI encompassed by SCAR-Q. Results 162 electronic patient charts were reviewed with 88 meeting inclusion criteria. 45 were females (51.1%) with an average age of 12.6(SD 3.1, 8–20 years) with time since injury scar of 4.0 years (SD4.6,1 month-17 years). Burns, specifically scalds (18,45.0%) were the most common etiology (40,45%). Scars were located predominantly on the face/scalp (34,39.5%), chest (16,18.6%), and arm (15,17.4%). Most patients had no previous scar intervention at the time of the consultation (43, 51.2%). No scar revision consults encompassed all COI as defined by the SCAR-Q with appearance and Symptom/Function questions being more common than Psychosocial (Table 1). Specifically, scar color, hardness/thickness, disliking the scar were the most frequently asked questions (Table 2). Conclusions There is currently no established gold standard for conducting scar revision consults. SCAR-Q, a newly validated scar-specific PROM was used to determine if all questions that are important to individuals with scars were asked during routine scar revision consults. The most common questions asked of individuals with scars were related to appearance followed closely by symptoms/functional implications. Questions related to psychosocial impact are not routinely asked and represent a large area of improvement. Next steps include implementing a scar-specific PROM to ensure that all COI are implemented in routine clinical care. Applicability of Research to Practice This research is applicable to practice as it shows that PROM can be utilized for QI studies including identifying areas that are lacking in scar revision consults.

An Independent Analysis of the Performance Characteristics and Economic Outcomes of the Liza Phase 1 Development Offshore Guyana Using Public Domain Data

2021 ◽  
Author(s):  
Simon Paul ◽  
Kadija Dyall ◽  
Quinn Gabriel
Keyword(s):  
Oil Recovery ◽  
Dynamic Models ◽  
Computer Modelling ◽  
Phase 1 ◽  
Water Injection ◽  
Public Domain ◽  
Gas Production ◽  
Google Earth ◽  
Reservoir Rock ◽  
Original Oil In Place

Abstract An attempt was made to independently verify the proposed performance of the Liza 1 field using only data available in the public domain. The data used in modelling was sourced from news reports, company disclosures and the analogue Jubilee field in Ghana. Reservoir rock and fluid data from Jubilee Field was deemed an appropriate fit because of the corroboration provided by the Atlantic Drift Theory. A major challenge in creating the model, was determining the aerial extent of the field. According to Yang and Escalona (2011), the subsurface can be reasonably approximated using the surface topography which is possible via the use of GIS software. Google Earth Pro software was used to estimate the coordinates and areal extent of the Liza 1 reservoir. A scaled image of the field location showing the Guyana coastline was re-sized to fit the coastline in Google Pro and then the coordinates for the Liza field and wildcat well locations were estimated. This was used to create the isopach map and set reservoir boundaries to create the static and dynamic models in Schlumberger's Petrel E & P Software Platform (2017) and Computer Modelling Group IMEX Black Oil and Unconventional Simulator CMG IMEX (2016). The initialized model investigated the reservoir performance with and without pressure maintenance over a twenty (20) year period. The original oil in place (OOIP) estimated by the model was 7% larger than the OOIP estimated by ExxonMobil for Liza field. The model produced 35% of the OOIP compared to 50% of OOIP as forecasted by the operators. (See Table 1). The factors that strongly influenced this outcome were, the well positioning and the water injection rates. A significant percentage of the oil remained unproduced in the lower layers of the model after the 20-year period. Time did not permit further modelling to improve the performance of the model. Table 1 Comparison of The Created Model and ExxonMobil's Proposal for Liza. Property ExxonMobil's statement on Liza field Modelled field Result Original Oil in Place (MMbbl) 896 967 Oil Recovery Factor (%) 50 35 Gas production from the model would be used as gas injection from three injector wells and as fuel for the proposed 200 MW power plant for Guyana. Even so, significant volumes of natural gas remained unallocated and subsequently a valuable resource may have to be flared.

INNOVATIVE SOFT SOIL IMPROVEMENT BY VACUUM DE-WATERING AND DYNAMIC COMPACTION

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Tuncer B. Edil
Keyword(s):  
Large Scale ◽  
Ground Improvement ◽  
Soft Soil ◽  
High Vacuum ◽  
Cohesive Soil ◽  
Soil Improvement ◽  
Economic Benefits ◽  
Dynamic Compaction ◽  
Environmental Benefits ◽  
Improvement Method

Recently, an innovative soft soil improvement method was advanced in China by integrating and modifying vacuum consolidation and dynamic compaction ground improvement techniques in an intelligent and controlled manner. This innovative soft soil improvement method is referred to as “High Vacuum Densification Method (HVDM)” to reflect its combined use of vacuum de-watering and dynamic compaction techniques in cycles. Over the past ten years, this innovative soft soil improvement technique has been successfully used in China and Asia for numerous large-scale soft soil improvement projects, from which enormous time and cost savings have been achieved. In this presentation, the working principles of the HVDM will be described. A discussion of the range of fine-grained, cohesive soil properties that would make them ideal for applying HVDM as an efficient ground improvement method will be discussed. The economic benefits and environmental benefits of HVDM are elucidated.

THE LACK OF SEA TO SUPPORT AGRI-ENVIRONMENTAL OBJECTIVES IN IRELAND'S RURAL ENVIRONMENT PROTECTION SCHEME

2011 ◽  
Vol 13 (01) ◽  
pp. 101-127 ◽  
Author(s):  
JACKIE WHELAN ◽  
JOHN FRY
Keyword(s):  
Environmental Protection ◽  
Environmental Benefits ◽  
Small Scale ◽  
Large Area ◽  
Protection Scheme ◽  
Ex Post ◽  
Environmental Objectives ◽  
Policy Objectives ◽  
High Level ◽  
Local Farm

Proposals specifically aimed at environmental benefits or enhancements are often exempt from environmental assessment, despite evidence that they can be counter-productive. This is true of agri-environmental schemes where local farm-scale actions are expected to generate large-area cumulative effects on water quality, biodiversity or landscape. Evidence suggests benefits of schemes have often been assumed rather than planned for, necessitating ex-post assessment to justify continuance. This paper argues the need for the Irish Rural Environmental Protection Scheme (REPS) to be assessed using SEA. REPS promoted a range of small-scale improvements in a bottom-up approach intended to reflect several high-level policy objectives primarily concerning environmental protection. The paper is based on analysis of "landscape protection" under the REPS from inception in 1994 until its phasing out period in 2015 when all participants will have completed their plans. The paper investigates how linking SEA to REPS had potential for harmonising with other policy objectives and therefore avoiding administrative duplication. Comparison with the Water Framework Directive suggests opportunities to connect different environmental procedures.

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