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- adhi gas-condensate process plant (1)
- annular pressure drilling (1)
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Islamabad
Copyright 2014, Society of Petroleum Engineers This paper was prepared for presentation at the PAPG/SPE Pakistan section Annual Technical Conference held in Islamabad, Pakistan, 24-27 November 2014. This paper was selected for presentation by an SPE program committee following review of information contained in an abstract submitted by the author(s). Contents of the paper have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, or members. Electronic reproduction, distribution, or storage of any part of this paper without the written consent of the Society of Petroleum Engineers is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of SPE copyright. Abstract Over the last decade, new technologies and economic strategies have enabled operators to give new life to mature fields and old platforms. Production and economic optimization are main goals of reentry campaigns. With time, the industry has seen growing opportunities for reentry wells as mature fields and platforms are becoming older and less productive. Fully utilizing reentry technological capabilities and achieving successful operations require effective well planning and execution. Cutting and pulling of old completions and casings, wellbore cleanouts, plug and abandonment operations, section milling, mud systems, well integrity, cased-hole and open hole sidetracks, whip stocks, cutting/swarf handling, surveying tools, well collisions, and existing rig capabilities on platforms are the major challenges to the growth of reentry business. However, development of rotary steerable systems, logging while drilling, modern surveying tools, and under-reaming technologies have given impetus to the reentry well drilling market. From the concept phase of plug and abandonment to well delivery and production, seamless planning and communication is required among all the stakeholders. Modern surveying tools such as continuous north-seeking gyros and gyro while drilling have revolutionized the surveying industry in high magnetic interference environments, giving ease to planning sidetracks and accurate wellbore positioning in high well-density environments.
doi: 10.2118/174718-MS
SPE-174718-MS
annular pressure drilling, Artificial Intelligence, artificial lift system, assembly, BHA, bit selection, casing and cementing, casing design, close proximity interval, collision, Completion Installation and Operations, directional drilling systems and equipment, Drilling Equipment, drilling operation, drillstring design, inclination, magnetic interference, offset well, operator, production control, production monitoring, reentry drilling, reentry well, Reservoir Characterization, Reservoir Surveillance, risk management, sidetrack, trajectory design, Upstream Oil & Gas, well decommissioning, well planning, Wellbore Design, wellbore integrity, whipstock
SPE Disciplines:
- Well Drilling > Wellbore Design > Wellbore integrity (1.00)
- Well Drilling > Well Planning > Trajectory design (1.00)
- Well Drilling > Pressure Management (1.00)
- (11 more...)
Combating Solids Precipitation and Depostition in ADHI Gas-Condensate Process Plant
Ahmed, Shujjat (Pakistan Petroleum Limited) | Qadeer, Suhail (Pakistan Petroleum Limited) | Bouamra, Reda (Pakistan Petroleum Limited) | Chaker, Ahmed Abu (Pakistan Petroleum Limited) | Jamaiuddin, Abul (Pakistan Petroleum Limited)
ABSTRACT Adhi gas—condensate field is located near Islamabad, Pakistan. Pakistan Petroleum Limited started fluid processing and recovery of Liquefied Petroleum Gas and Condensate around in 1990. The liquid stream was processed with no solids deposition in the past. Recently, the liquid processing circuit of the plant has experienced an increasing amount of black solid deposition, which is trapped into the liquid filters located in the plant. To identify the root causes of the problem of these solids depositional systematic approach was applied including taking various solid, liquid and gas samples from the plant inlet and various locations inside the processing plant and analyzing them for diagnostics. Based on the outcome of the root-cause analysis, a chemical mitigation strategy has been developed, tested and implemented, resulting in significant reduction in problems related with solid depositions in processing plant.
adhi gas-condensate process plant, asphaltene, asphaltene inhibition, Asphaltene Precipitation, asphaltene remediation, chemical performance, combating solid precipitation, complex reservoir, condensate reservoir, deposition, depostition, downhole intervention, filter change frequency, flow assurance, hydrate inhibition, Hydrate Remediation, intervención de pozos petroleros, oilfield chemistry, paraffin remediation, Petroleum Engineer, precipitation, Production Chemistry, production enhancement, remediation of hydrates, scale inhibition, scale remediation, solid deposition, solid deposition problem, spe 163119, University, Upstream Oil & Gas, wax inhibition, wax remediation, Well Intervention
Oilfield Places:
- Asia > Pakistan > Balochistan > Dera Bugti District > Lower Indus Basin > Guddu Block > Sui Field (0.99)
- Asia > Pakistan > Punjab > Upper Indus Basin > Potwar Basin > Adhi Field > Chorgali-Sakesar Formation (0.98)
SPE Disciplines:
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Gas-condensate reservoirs (1.00)
- Production and Well Operations > Well Intervention (1.00)
- Production and Well Operations > Production Chemistry, Metallurgy and Biology > Inhibition and remediation of hydrates, scale, paraffin / wax and asphaltene (1.00)
- Facilities Design, Construction and Operation > Flow Assurance > Precipitates (paraffin, asphaltenes, etc.) (1.00)
Impacts of Saturation On Rainfall-triggered Slope Failures At the Simbal Landslide, Pakistan
Ahmed, Muhammad Farooq (Department of Geological Science and Engineering, Missouri University of Science & Technology) | Rogers, J. David (Department of Geological Science and Engineering, Missouri University of Science & Technology) | Farooq, Khalid (Department of Civil Engineering, University of Engineering and Technology Lahore)
ABSTRACT: On August 10, 2005 a landslide of approximately 133,000 m3 occurred along the Lahore-Islamabad Motorway (M- 2) near the village of Simbal, in the Salt Range area of Pakistan. A program of research was undertaken to evaluate the likely impacts of percent saturation and bulk density on mobilized shear strength along the basal rupture surface of the Simbal Landslide. A series of direct shear tests [1] were performed on remolded samples at different densities. The percent saturation was then varied on these samples to evaluate its impact on mobilized shear strength. The results of these tests suggest that soil cohesion and friction tended to decrease with increasing percent saturation. The tests also showed that the shear strength parameters tended to increase with increasing dry density; however, all of the samples exhibited a noticeable loss of shear strength with increasing degree of saturation, independent of soil density. Limit equilibrium slope stability analyses were performed along the most probable failure planes, based on shear strength parameters corresponding to degrees of saturation, varying between 20% to 100% over a wide range of in-situ densities. The results of these analyses suggests that the factor of safety drops significantly, (from FS = 1.6 down to 0.41) as the degree of saturation approaches unity. 1. INTRODUCTION A significant landslide occurred on 10th August, 2005 near village Simbal along the Lahore-Islamabad Motorway (M-2) in Pakistan’s Salt Range, after a period of intense precipitation. This resulted in a large volume of slide debris (approximately 91,500 m3 of colluvium and 41,000m3 of limestone and shale) moving down the slope, blocking a portion of the motorway. The relationship between the shear strength and degree of saturation for different soils has been studied by various researchers outside of Pakistan [2-6].
bulk density, debris, direct shear test result, dry density, flow in porous media, Fluid Dynamics, friction, internal friction, log analysis, matrix soil, modified proctor, normal stress, Pakistan, proctor dry density, Reservoir Characterization, rupture surface, saturation, shear strength, Simbal Landslide, standard proctor, Upstream Oil & Gas, well logging
Genre:
- Research Report > New Finding (1.00)
- Research Report > Experimental Study (0.69)
Real-Time Solutions for Horizontal Well Challenges Workshop Studies Management of Mature The Pakistan Section held a technical session led by Robert Reservoirs Dennis, Schlumberger's Petrophysical Adviser for Saudi More than 60 experts and professionals gathered in The Arabia, Kuwait, Bahrain, and Pakistan, in Karachi on 13 Netherlands during 4-7 June to attend the Applied May and again in Islamabad on 14 May. More than 100 Technology Workshop (ATW) "Field Management of professionals attended each session on "Challenges in Mature Reservoirs," the last in a series of three workshops Optimizing Horizontal Well Placement" with an emphasis on the subject. However, in Pakistan, more resources, and technical challenges facing mature fields. In his presentation, Dennis illustrated the and People" by John Darley, Director, Shell, the first measurements and techniques available in the industry technical session offered a comparison of mature field and how they are used to assist in optimizing the strategies and trends from large operators, medium/small placement of a horizontal well. Sessions used Placing a horizontal well poses many challenges case histories on mature fields such as the North Sea to including structural and stratigraphic uncertainties and illustrate and address the topics of technology applications, unknowns in drilling mechanics. Every day, engineers operating efficiency and technical limits, facilities, and risk come face to face with survey errors, depth errors, and management. Well placement objectives, using the current geological - Seen as low profile for career advancement. Extraordinary Results From Ordinary People?" Panelists Limitations of the model must be recognized during Giovanni Paccaloni, Vice President, Technical Services planning.
Country:
- Europe > United Kingdom > North Sea (0.25)
- Europe > Norway > North Sea (0.25)
- Europe > Netherlands > North Sea (0.25)
- (5 more...)
SPE Disciplines:
Abstract The Adhi field has two main producing horizons, Tobra and Khewra. producing horizons, Tobra and Khewra. Both are gas condensate reservoirs with reservoir pressures just above the dewpoint pressures of reservoir fluids. Because of structural complexity, high drilling cost and retrograde nature of reservoir fluids, compositional simulation study was undertaken to examine the behaviour of field under various depletion and cycling recovery schemes. The paper describes the application of compositional simulation to evaluate the relative advantages of various production strategies in a gas-condensate reservoir. The paper also discusses the problems associated and limitations of a compositional radial model in matching the short-term test data for a well with flowing bottom-hole pressure below the dewpoint pressure pressure below the dewpoint pressure of reservoir fluid. Use of well test derived permeability in the single-well model resulted permeability in the single-well model resulted in considerable condensate accumulation, sharp decrease in well deliverability and rapid rise in separator Gas/Oil ratio (GOR) not indicated in the actual well performance. prediction runs show that performance. prediction runs show that gas cycling would yield an additional 3.5 percent of initial-oil-in-place (IOIP) in percent of initial-oil-in-place (IOIP) in 18 years of production. Introduction The Adhi field is located about 35 miles (56 km) south of Islamabad (Fig. 1), in northern Pakistan. This area is situated in the eastern part of the Potwar basin and near the producing oil Potwar basin and near the producing oil fields of Balkassar and Joyamair. Four wells were drilled in this area between 1956 and 1967. All these wells were abandoned due to extremely difficult conditions in the form of subsurface structural complexities, loss of circulation and high pressure water inflows. The fifth well, drilled in 1978, on the crest of the structure successfully reached the objective depth and proved moveable hydrocarbons in the Khewra (Cambrian), Tobra (Permian) and Sakesar (Eocene) formations. Since then two more wells were abandoned due to drilling problems and todate, only 3 wells have problems and todate, only 3 wells have been successfully completed. Extremely high drilling costs and low success ratios warrant as few wells be drilled as possible. The development of field is possible. The development of field is further complicated by the complex geology. The structure is severely faulted and the degree of communication across the faults is unknown. Khewra and Tobra are gas-condensate reservoirs with their dewpoint pressures very close to the reservoir pressures very close to the reservoir pressures. In view of the complex pressures. In view of the complex geology, extreme drilling conditions and gas-condensate nature of the Khewra and Tobra reservoirs, it was decided to carry out compositional simulation studies to examine the behaviour of the field under various production strategies, namely simple depletion, accelerated depletion and gas-cycling. Sensitivities to factors subject to uncertainity were also studied. P. 641
complex reservoir, compositional simulation study, condensate accumulation, condensate reservoir, development scenario, Drillstem Testing, drillstem/well testing, fraction, gas-condensate reservoir, GOR, Khewra, Modeling & Simulation, permeability, Petroleum Engineer, production strategy, productivity, pseudo component, recovery, reservoir simulation, saturation, spe 15767, Tobra, Upstream Oil & Gas, wellbore
Oilfield Places:
- South America > Colombia > Llanos Basin > C7 Formation (0.99)
- Asia > Pakistan > Punjab > Upper Indus Basin > Potwar Basin > Adhi Field > Chorgali-Sakesar Formation (0.99)
- Asia > Kazakhstan > Aktobe Oblast > Precaspian Basin > North Block (0.99)
SPE Disciplines:
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Gas-condensate reservoirs (1.00)
- Reservoir Description and Dynamics > Reservoir Simulation (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Drillstem/well testing (1.00)
- Reservoir Description and Dynamics > Fluid Characterization (1.00)
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