bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gas Transport as Hydrate
Authors: Pallipurath Mohamed Iqbal 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
A new process of transportation of Natural Gas using Gas Hydrate is presented as applicable to land transport in India. India's vast resources of stranded gas fields can be economically brought to the consumer via this technology. Current methodologies are discussed and an appropriate form is presented in the context of domestic road and rail networks. Formation, storage, transport and recovery issues are addressed. Economic viability is investigated. Formation and Transport are redesigned to suit domestic conditions of labor and road/rail system.
Smart Completion Installation and Experience in a High Pressure Gas Environment in Champion West field, Offshore Brunei
Authors: Turco Agostino , Salakhetdinov Ravil , Dale-Pine Brigitte , Van Lelden Robert 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
The current phase of the Champion West Field Development is one of BSP's most challenging project to date for drilling and completion reasons. The Champion West field was discovered in 1975, but its rich oil and gas reserves lay dormant for 30 years, locked beneath the seabed in a complex web of reservoirs deemed too expensive to develop using conventional development plans. It is a large undeveloped oil and gas resource in Brunei. Hydrocarbons are found in shallow marine reservoirs - these vertically stacked, structurally dipping reservoirs are complex and contain various fluid fills ranging from gas only to gas with oil rims to oil. The project consists developing oil rim reservoirs using the novel snake well design and developing of significant gas resources using highly deviated and high-pressured gas wells. Four wells have been drilled to date utilizing advanced drilling technologies and smart-completion equipment to complete over many stacked reservoirs with different pressure regimes, whilst aiming to maximizing ultimate recovery for those sand units. The world first six- zones Smart completion were successfully installed in 2007 with the objectives of realizing increased recovery and a reduction in life cycle cost through real time monitoring and production optimization and a reduction in well intervention as well as reduction in HSE exposure. Challenges associated within the gas project included: Drilling through depleted and virgin pressure regimes of up to 8200 psi; Extended reach drilling of up to 7.3 km; Perforation; and, Installation of Smart-Completions in high-pressured gas environment. In addition to significant oil production, Champion West has been contributing to around 20% of BSP's gas production with a significant proportion coming from these recently drilled gas wells. This paper describes the well concepts adopted and the experiences developed throughout the project in drilling and installing Smart-Completions in this high-pressure gas environment.
Imaging Improvement of Fractured and Faulted Basement through Controlled Beam Migration Examples from Diamond Field in Vietnam
Authors: ElKady Nabil , Tan Yen Chu , Baker Rizal , Zhou Ziqiang Joe , Khoo Pauline , Tan Ann 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
The accurate determination of the velocity distribution in the subsurface is the single most important part in the long sequence of processing steps. Those accurate tomographic velocity models demand a state-of-the-art migration algorithms to honor the details that are needed in imaging the relevant complex structures. Controlled Beam Migration (CBM) is one of those techniques that exhibit an excellent impact on imaging Fractured and Faulted Granite basement. The velocity model that is used for depth imaging generally undergoes various iterations. It is the most difficult process, but yet also is the most important part of the velocity puzzle. Cell Based Tomography technique based on residual curvature analysis (RCA) was used for sediments velocity model building above the basement. In order to overcome the limitation of RCA tomography as it becomes less sensitive to velocity perturbation at deeper depth, Stack Sweep method has been performed to update the velocities inside the basement reservoir. This paper will concentrate mainly on the uplift of data imaging starting with Kirchhoff Pre Stack Time Migration passing through Kirchhoff Pre Stack Depth Migration and ending with Controlled Beam migration. CBM has a combined advantage of Kirchhoff migration (steep dip imaging) and Wave Equation Migration (multi-arrivals). It handles multi-arrivals, resulting in a cleaner image than Kirchhoff migration, and preserves the steep dips. Examples of the techniques are shown on data from Diamond Field, Offshore Vietnam with a discussion of specific issues that were encountered during processing.
Depositional Environment of the Upper Swan Sandstones, Caswell Sub Basin, Australia
Authors: Horton Phillip John , Harrison Paul , MacDonald Shona , Partington Mark 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
The Upper Swan sandstones represent a key exploration target in the Caswell Sub-basin and are the main reservoir units for the large Ichthys-Prelude gas-condensate field. The sandstones are present west of the Yampi Shelf margin from Leveque-1 in the southwest to Maret-1 in the northeast, and in the central portion of the Caswell Sub-basin extend to the northwest as far as Caswell-2.
Within the Caswell Sub-basin the Upper Swan sandstones are best understood in the Ichthys-Prelude gas-condensate field where twelve wells have been drilled to date. Interpretation of nearly 600m of conventional core, wireline logs, image logs and 3D seismic surveys have contributed significantly to the understanding of the depositional environment.
The Upper Swan sandstones is a lithostratigraphic term for sandstones that range in age from Latest Jurassic (Tithonian) to early Cretaceous (Berriasian) and are calibrated to the P. iehiense, K. wisemaniae and C. delicata Biozones. These sandstones are sourced from the Yampi Shelf and typically onlap and overstep Tithonian-aged mudstones. The sandstones are quartz rich, dominantly fine - medium grained with occasional very fine to coarse grained units present. Individual sandstone units range in thickness from centimetre scale up to several metres and are typically relatively featureless, homogeneous beds with occasional dewatering structures. Thin claystones typically centimetre to tens of centimetres thick, but up to 15m thick locally, are interbedded with the sandstones.
Core data suggests they were deposited as a series of stacked sand-rich gravity flows comprising repeated massive suspension (S3) and thin traction flows (T1 and T2) (dense flows of Lowe, 1982) in a shallowing Outer to Middle shelf characterised by vertically shallowing ichnofossil associations of Chondrites, Phycosiphon/Chondrites to Zoophycus/Phycospihon.
In the Prelude Field, the Tithonian and Berriasian-aged sandstones are mineralogically similar, with a complex diagenetic history consisting of compaction, quartz cementation, framework grain dissolution, precipitation of kaolinite/dickite, and the formation of authigenic illite. Authigenic clays appear to be of the greatest importance in the Upper Swan Sandstone in terms of reservoir quality with the data indicating the older sandstones tend to have higher total clay content and these are typically tight.
Integration of Downstream and Upstream Capabilities for Field Wide Production Optimization
Authors: Mardikar Asit , Van Donkelaar Edwin , Goh Keat Choon 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
The demand for oil and gas is ever increasing. At the same time much of the new oil is in challenging environments and is increasingly becoming more difficult to produce. This, together with exponentially increasing communications capacity and computing power, has led to several initiatives in the area of Digital Oil Fields, Smart Fields C_ etc. In all these initiatives, optimization on multiple economically relevant time scales plays an important role. The downstream refining and chemicals businesses have faced similar questions and have developed a well-established hierarchy for optimization on multiple time scales (Long Term Planning, Scheduling, Real-Time Optimization, Performance Monitoring, APC, Base-layer control) in which the scope, time scales, integration, interfaces etc. have been clearly defined.
There are several differences between the production system in the upstream and downstream supply chain. For example, diverse environments and workforces, significant and dynamically changing subsurface uncertainty and time scales of decades with respect to reservoir systems can characterize the upstream supply system. However, many principles of optimization and uncertainty management, such as the "division of time scales principle", are equally valid for upstream and downstream systems. This allows great opportunities to integrate and synergize upstream and downstream technologies.
This paper describes how such an optimization hierarchy can be constructed for field-wide production optimization, integrating downstream and upstream concepts. This paper will propose solutions based on the above concepts, while considering business decision requirements, engineering workflows and collaborative working. It will also indicate the challenges that need to be addressed to implement and maintain such applications reliably in the oil and gas production environment. A number of concrete field cases where (part of) this principle is successfully applied will also be presented.
An Integrated Sedimentological Approach to the Characterisation of an Incised Valley System: Example from the Miocene of the Malay Basin
Authors: Rees Andrew James , Lucas Peter M. , McCants Carson Young , Rae Stanley F. 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
The characteristic fill and sediment architecture of incised valley systems offer very attractive exploration opportunities, but require a fully integrated approach to fully quantify. Incised valley fill reservoirs are typically associated with rapid base level fall exposing previously deposited marine sediments to subaerial erosion and incision by fluvial processes. The accommodation space this incision creates is typically filled during the subsequent transgression by a complex mosaic of coastal plain and nearshore facies that produces reservoirs confined in time and space, but inherently highly heterogeneous in make-up. The problems imposed by acute reservoir heterogeneity are overcome by integrating traditional sedimentological methodologies with sequence stratigraphic concepts helping to define the allocyclic and autocyclic controls on sedimentation.
This investigation into tropical incised valley and estuarine depositional systems utilises high resolution core description, FMI/OBMI borehole images and conventional wireline logs from seventeen closely spaced wells penetrating the Miocene of the Central Malay basin. Detailed reservoir layering, depositional modelling and facies mapping has been integrated with seismic attribute analysis and static reservoir models to offer a unique insight into the reservoir architecture and properties of this inherently complex facies mosaic.
The resulting sedimentological model has led to improved stochastic modelling and improved reservoir deliverability. Successful marginal field developments in the 21st century mandate a reduction in subsurface uncertainties to mitigate cost over runs and successful commercial exploitation. This integrated approach to subsurface risk reduction has led to the successful commercial exploitation of the Malaysian asset.
Reconciling History Matching and Assessment of Uncertainty in Production Forecasts: A Study Combining Experimental Design, Proxy Models and Genetic Algorithms
Authors: Castellini Alexandre , Vahedi Arman , Singh Updesh , Sawiris Ramzy Shenouda , Roach Thomas 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract

Description
The paper presents a method to tackle complex inverse problems where highly non-linear responses are involved. Geological models are built within an experimental design framework and are characterized by an objective function that estimates the quality of the history-match. The goal is to efficiently find combinations of parameters that minimize the objective function. Genetic algorithms are the main optimization tool in the workflow. In order to reduce the number of actual simulations and to accelerate the overall procedure, non-linear response surfaces, built with kriging interpolants at each iteration of the optimization routine, filter out unnecessary combinations of parameters. The models that reasonably honor the historical data are selected via cluster analysis techniques and provide an estimate of future production. The final distribution of the prediction variables defines the range of uncertainty conditioned to production history.

Application
The practicality of the workflow is demonstrated on the Malampaya field, a Gas Condensate reservoir in the Philippines. The field is a Tertiary Carbonate build-up situated offshore, below 800–1200m of water. It has been supplying gas from five subsea production wells since 2001 to three Gas-to-Power plants. Available subsurface data include a high resolution 3D seismic survey, five production wells with downhole pressure gauges and six appraisal wells with wireline and borehole image data, pressure and well test data.

Results
The strategy ensures multiple and significantly different history-matched models that provide estimation of the future performance of the reservoir. The coupling of space-filling sampling strategies, optimization algorithms, non-linear response surfaces and high performance computer clusters proved efficient in addressing the issue. In addition to a robust assessment of ranges in production forecast, representative P10, P50 and P90 individuals were selected from the portfolio of models for further analysis including optimization of development plan.

Significance
Understanding the impact of subsurface uncertainties on production responses is an integral part of the decision making process. A more accurate quantification of the uncertainty band around production forecasts contributes to better business decisions. Traditional experimental design workflows might be well suited for new field developments. However, when a field has been produced for several years, all models have to be conditioned to available production data in order to obtain meaningful predictions. This paper addresses the limitations of conventional techniques and provides a practical, structured workflow to reconcile the processes of data integration and uncertainty assessment.
Development of a Retrievable Single Trip Tubing Straddle Improves Success Rate on the North Slope of Alaska
Authors: Julian Jennifer Yvonne 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract

Description
At Prudhoe Bay, Alaska, non-rig tubing repairs have become a viable alternative to rig workovers (RWO's). They provide an economic remediation for wells with production tubing by A annulus communication. Wireline-set retrievable straddles can eliminate tubing communication at a significant cost savings. The advantage over a conventional RWO is that there is no need to pull tubing, resulting in the well being returned to service faster.

Application
Single set or "one-trip" straddles were used historically at Prudhoe Bay, however, starting in 1994, a less expensive two run straddle design was adopted. A 2006 study of 263 permanent and retrievable tubing straddles set in 181 wells at Prudhoe Bay determined that single set straddles were far more successful and lasted longer than two set straddles.

Results, Observations, Conclusions
This paper describes the recent development, history, and success rate of a retrievable, single set tubing straddle for 4-1/2" and 3-1/2" tubing. It details the modifications required to convert a hydraulic set straddle pack-off to a one trip wireline set system. It also updates the analysis of more than 300 tubing straddles set since 1985.
The high success rate of the single set straddle has increased confidence in straddle operations at Prudhoe Bay.1. A single set tubing straddle has been developed to set in 3-1/2" and 4-1/2" tubing at Prudhoe Bay with an 80% success rate. This is a significant increase in success over the approximately 50% it has been in the last few years.2. Although there have been six failures, there is no one cause for failure. Continued analysis will improve candidate selection and pre-straddle diagnostics.3. Only one straddle has failed since successfully set, with a life of 1.4 years.A study of 263 straddles set between 1985 and 2005 indicates a conservative life of 3.5 years. It is likely that average life for single set straddles will be at least that long.4. A pre-straddle drift which mimics actual straddle length and OD is very important to ensure a successful set, particularly for wells with tight tolerances.

Significance
Single set tubing straddles can remediate tubing by "A" annulus communication at a tremendous in areas where rig workover cost is significant. They are particularly attractive in areas where rig workover cost is significant, such as offshore, remote, or arctic locations.
Applied Research Work on Density Log Responses in Thinly Laminated Bedded Sediments is Leading to a Better Understanding of Reservoir and Well Performance in West Africa
Authors: Stockhausen Edward Joseph , Condon Patrick 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract
The application of joint industry and university research focused on quantifying density log responses from high angle and horizontal wells drilled in thinly bedded sediments is providing the basis for an improved understanding of Cretaceous shallow marine reservoirs in the Lower Congo Basin, West Africa. These reservoirs are dominated by a thick section of thinly bedded - alternating tight and porous siltstones - that are correlateable on a field-wide scale of several kilometers. The vertical well data in these reservoirs lacks the resolution needed to define the true nature of these thin beds. The research work shows that in vertical wells it is the source to detector spacing that drives the vertical resolution of the density log response. In horizontal wells, it is the depth of investigation that drives the log response. There is approximately a 3 to 1 ratio difference in vertical resolution between the density log response in horizontal and vertical wells. In these reservoirs, the density log data from horizontal wells is able to fully define most of the thin beds in these reservoirs which, are in the order of 6 inches (15.2 Cm) thick. A second part of the research shows how enhanced vertical resolution processing can improve the resolution from vertical and deviated wells. As the hole inclination increases to approximately 45 degrees and above, the enhanced vertical resolution processing begins to match that of the horizontal wells with standard density processing.
Updated reservoir simulation models, based upon new high resolution data from horizontal wells and reprocessed deviated wells are providing new insights into the performance of both producing oil wells and water injectors. The improved understanding of the fine scale reservoir properties is enhancing both operations and infill drilling strategy
Mapping of Social Communities and Issues in the Industrial Context
Authors: Du Laz Marie-Alix 
Published: May 2016

This reference is for an abstract only. A full paper was not submitted for this conference.

Abstract

1. Context
Total E&P Indonsie's activities are mostly located on the Indonesian part of the Borneo island - East Kalimantan province. The operations are concentrated in the Mahakam delta, a mangrove area of about 1500 km2, that has approximatively 60 000 inhabitants and an intense fishing activity. With a yearly production of about 2600 MMscfd, TI is a major social and economic actor in the region, and needs to map precisely its external stakeholders and their needs, in order to guarantee good relations with its local communities neighbors, and therefore smooth operations.

2. Methodology
The methodology used is called SRM+ (Social Relationship Management) and has been developed by Total headquarters. The principle is to bring the societal approach in line with its stakeholder expectations and to encourage the management team to share common views on local communities' issues and solutions.
The tool includes following steps:–conducting a comprehensive societal diagnosis–defining the history of relations with stakeholders–mapping the stakeholders and their expectations–defining clear areas for improvement to draw up a community action plan

3. Results
TI has conducted the methodology in one of its operational site, the Senipah base. It has allowed the site management and teams to share information about local communities issues that might not have been clearly identified, and to start looking for common solutions implicating the intervention of various departments and divisions. It has also allowed the creation of a map identifying clearly the major external stakeholders for which the site needs to elaborate a clear strategy of communication and actions, for example the groups of fishermen fishing in the Mahakam Delta, the inhabitants who installed close to the pipelines or the fishermen who installed shrimp pond farms in the Delta.