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IPTC 2007: International Petroleum Technology Conference
- Conference date: 04 Dec 2007 - 06 Dec 2007
- Location: Dubai, United Arab Emirates
- Published: 04 December 2007
21 - 40 of 267 results
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Challenged of Natural Gas Utilization in Nigeria
More LessNigeria is endowed with abundant Natural gas resources, which in terms of energy, is in excess of the nation’s proven crude oil reserves.
Development and utilization of Natural gas is becoming a major concern in terms of primary energy worldwide due to its abundance,
fl exibility and combustion characteristics.
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A Full-Field Simulation Study of the Effect of Foam Injection on Recovery Factor of an Iranian Oil Reservoir
Authors S.M. Seyed Alizadeh, N. Alizadeh and B. MainiIn some of Iranian oil reservoirs gas is injected for pressure
maintenance as well as displacement of oil by gas. In some of
these fields, it comes to a premature breakthrough of injected
gas due to high permeability in some regions of the reservoir
or because of the geometry of the reservoir.
Foam injection appears to be a promising tool in solving
the problem with thief zones and low recovery from EOR
methods such as immiscible gas injection in Iranian oil
reservoirs. It can also mitigate the effect of gravity override
and achieve increased displacement efficiency in these
reservoirs.
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Using Conventional Logs for Fracture Detection and Characterization in One of Iranian Field
Authors A.R. Mohebbi, M. Haghighi and M. SahimiFracture analysis is generally accepted as one of the main
steps through better understanding and optimization of
assessment to production in most of the carbonate reservoirs.
Effects of fracturing on reservoir performance provides
engineers and geoscientists with the information needed to
make business decisions with a higher degree of certainty.
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The Control of Fracturing and Dolomitisation on 3D Reservoir Property Distribution of the Asmari Formation (Oligocene-Lower Miocene), Dezful Embayment, SW Iran
Authors A.A.M. Aqrawi and O.P. WennbergThe Asmari Formation (Oligocene-early Miocene) is the most
important reservoir in the oilfields in the Zagros foreland of
the Dezful Embayment of SW Iran. The carbonate reservoirs
of the Asmari Formation are characterized by low matrix
permeability, and effective drainage is dependent on the
occurrence of open fractures. The fractures have been formed
during the Zagros Orogeny since late Miocene, which is also
responsible for the geometry and formation of NW-SE
trending anticlinal traps. Dolomitisation is another factor
controlling reservoir qualities as dolostones in general have
higher porosities than limestones.
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Planning and Executing Long Distance Subsea Tie-Back Oil Well Testing: Lessons Learned
By A.F. HarunThree subsea oil wells in a water depth ranging between 5200
and 5400 ft in the Gulf of Mexico are tied back to a Tension
Leg Platform via a flowline network of a single 2.3 miles
pipe-in-pipe connected to a 17 miles dual active-heating
flowline. During normal operation these wells flow to a
common separator at the topsides. Production allocation to
each well is done by subtracting the topsides separator
measurement by the subsea multiphase flow meter reading
dedicated to one of the wells and manually splitted between
the other two wells.
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Reactive Transport Models of Limestone-Dolomite Transitions: Implications for Reservoir Connectivity
Authors Y. Xiao and G.D. JonesSubstantial volumes of world hydrocarbon resources occur in
interlayered limestone-dolomite reservoirs. Diagenetic
variations in lithology and primary depositional texture control
the magnitude and spatial distribution of petrophysical
properties. The frequency and nature of limestone-dolomite
transitions that define flow units and baffles/barriers are
critical for understanding reservoir connectivity and
optimizing field development.
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Guidelines for Polymer Flooding Evaluation and Development
Authors R.D. Kaminsky, R.C. Wattenbarger, R.C. Szafranski and A.S. CouteeField experience has shown that polymer flooding can be
an effective means to improve oil recovery. Evaluating
whether a polymer flood is suitable for a given field and
developing the optimal design requires considerable analysis
and testing prior to full-scale implementation. To help manage
this process, guidelines for polymer flooding evaluation and
development were developed that are described in this paper.
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Identifying Fluid Type and Contacts in Carbonate Reservoirs
Authors H.-Y. Tseng, R.J. Pottorf, D. Mardon and P.J. MankiewiczPresent-day fluid type and contacts in carbonate reservoirs can
be difficult to determine from standard formation evaluation
techniques because of complex rock properties and variable
fluid compositions. In such situations, integrating novel rockbased
geochemical analyses of adsorbed and inclusion-trapped
fluids helps reduce fluid contact uncertainty and evaluate the
probability of various fluid types.
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Integrated Reservoir Modeling to Maximize the Value of a Large Sour-Gas Field With High Concentrations of Inerts
Authors N.S. Huang, G.E. Aho, B.H. Baker, T.R. Matthews and R.J. PottorfThe Madison reservoir in LaBarge Field in Wyoming, U.S.A.,
is a multi-zone carbonate on the crest of a regionally plunging
anticline. It is ~800 ft thick, covers more than 1,000 square
miles, includes 4,000 ft of structural closure and holds 22
TSCF initial methane in-place. Methane percentage varies
from a high of 23% at the crest to a low of 5% near the gaswater
contact, with inerts – CO2, N2, H2S and He – making up
the remaining gas. ExxonMobil is the only operator producing
from LaBarge Madison and has built a dedicated gas plant to
monetize the resource. Current production is 700 MMSCF/d
(150 MMSCF/d methane) with 16 crestal producers and two
downdip injectors re-injecting 60 MMSCF/d acid gas into the
Madison aquifer – one of the world’s largest acid gas reinjection
projects.
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Multi-Azimuth Streamer Acquisition—Initial Data Analysis
Authors W. Rietveld, J. Keggin, M. Benson, T. Manning, A. Burke and A. HalimA thin but complex layer of partially eroded anhydrite and
other facies lie at a depth of around 3km across large areas of
the Nile Delta in the Mediterranean. Wavefield distortion,
attenuation and the generation of complex multiple diffraction
noise cause the quality of the underlying seismic image to be
highly variable. Multi-azimuth (MAZ) seismic can help
resolve these issues and improve the deep pre-Messinian
image.
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History Match of an Old Waterflood: Dealing Wth Decades Worth of Data From Hundreds of Wells
Authors N. Belova, L. Berul and A. SentyuriyevThe main objective of the mature fields development
optimization is the value adding through extension of field
life.
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Biostratigraphic Constraints on the Shuaiba Formation
Authors A.M. Gombos Jr., C.J. Strohmenger and T.C. HuangThe Shuaiba Formation is the uppermost unit of the
Thamama Group, and is the most prolific oil reservoir in
Field A. The Thamama Group is part of a second order
supersequence that spans the Valanginian to Aptian
stages (Sharland et al., 2001).
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The Jurassic-Age Marrat Reservoir at Humma Field, Partitioned Neutral Zone (PNZ), Saudi Arabia and Kuwait—Utilization of a Probabilistic, Two Stage Design of Experiments Workflow for Reservoir Characterization and Management
Authors W.S. Meddaugh, D. Barge, W.W. Todd and S. GriestThe Jurassic-age Humma Marrat carbonate reservoir is mainly
located in the southwest corner of the Partitioned Neutral Zone
(PNZ) between Saudi Arabia and Kuwait. The reservoir was
discovered in 1998. The reservoir depth is about 9000 ft
subsea. The gross reservoir interval is approximately 730 ft
thick (110 ft net). The lowermost Marrat E zone contributes
80-90% of the production based on PLT data. The
productivity of the Marrat E is dominated by a forty-foot
thick, largely dolomitized interval with 15-20% porosity and
20-100 mD permeability. The upper zones contribute 10-20%
of the production from thin intervals with 12-15% porosity
and 2-5 mD permeability.
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REACH and the HSE Case for Formate Brines
Authors Y. Gilbert, A. Nordone, J. Downs, A. Vaahtera, P. Pessala and T. RaivioEurope's biggest-ever single piece of legislation, REACH
(Registration, Evaluation and Authorisation of Chemicals),
entered into force on June 1, 2007. REACH requires
manufacturers, importers and users of chemicals to
demonstrate that their products are safe to use for humans and
the environment. There will be increasing pressure to
substitute chemicals perceived as potentially harmful with less
hazardous materials. The legislation is expected to have a
significant effect on the management and application of
chemicals used by the oil industry in Europe.
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Reconciling Subsurface Uncertainty With the Appropriate Well Design Using the Mechanical Earth Model (MEM) Approach
Authors H.E. Goodman and P. ConnollyThe involvement of the well engineer (WE) competency from
the earliest phases of exploration is reaping economic benefit
for major capital projects (single wells costing at least
$25,000,000 US). As the geological and geophysical modeling
work of the Explorationists matures and the subsurface picture
becomes clearer, the appropriate well design flexibility is
being achieved using Mechanical Earth Model (MEM)
technology. This approach to well planning is particularly
beneficial for deepwater exploration.
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Studies on the Pilot Test With Microbial Profile Modification After Polymer Flooding in Daqing Oilfield
Authors C. Jiecheng, L. Wei, Z. Jingyuan, W. Junzheng, Y. Zhenyu and G. CuilingIn order to further enhance oil recovery of the reservoirs after
polymer flooding, two strains of bacterium that could be used
on microbial profile modification have been screened. The
bacterium were separated from the fluid sample produced
within the commercial polymer flooding blocks of Daqing oilfield,
and named DT-1 and DT-2. The evaluation of
performance showed that these two microorganisms could not
only adapt to the special conditions of the reservoirs after
polymer flooding, but also could grow well with the in-situ
microorganisms.
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Kinetic Hydrate Inhibitors—Sensitivity Towards Pressure and Corrosion Inhibitors
Authors J.-L. Peytavy, P. Glénat and P. BourgReplacement of the traditional thermodynamic hydrate
inhibitors (methanol and glycols) in wet gas applications is
more and more highly desirable for cost savings and for
Health, Safety & Environment (HSE) considerations. This
seems achievable by using alternative Kinetic Hydrate
Inhibitors (KHI). KHIs are able to delay hydrate formation for
the time needed to transport the effluents in hydrate region
conditions.
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Review of and Outlook for Enhanced Oil Recovery Techniques in Kuwait Oil Reservoirs
Authors S.F. Alkafeef and A.M. ZaidIn this paper, we carried out an updated investigation of
enhanced oil recovery (EOR) applications in Kuwait. The
investigation employs EOR screening analysis to determine the
suitability of EOR processes to mature oil reservoirs.
Following the determination of the suitable EOR process, we
performed incremental recovery (IR) calculations. We also
performed a preliminary economic analysis to determine the
economic feasibility of the EOR processes in question.
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Maxwell Creep of Formation Layer Causes Better Production of Second Fracture
More LessThe placement of two or more hydraulic fractures at close
proximity has generally been discouraged by most stimulation
related publications within the industry. The general
consensus has been that the fractures tend to interfere with
each other in producing the same hydrocarbon source. The
rule of thumb for this practice is to place hydraulic fractures
substantially separated from one another in a horizontal
wellbore or in different layers in a vertical well.
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