Characterization of oil and gas reservoir heterogeneity

Sharma, G. D.

doi:10.2172/5053682

Cited by 2 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Proposed model for permeability damage under static conditions is used to analyse the results of experiments performed by Sharma et al (1992) and Kocabas (2003), conducted on sandstone and carbonate media respectively. Key experimental data for both experiments are summarised in Table 1, which also includes results of model validation to be discussed shortly.…”

Section: Model Validationmentioning

confidence: 99%

“…Key experimental data for both experiments are summarised in Table 1, which also includes results of model validation to be discussed shortly. Sharma et al (1992) measured the effect of asphaltene deposition by noting changes in the oil-water relative permeability curves, absolute permeability reduction, displacement performance and oil recovery for three different sandstone cores. Test-set 1 was based on consolidated core, while Test-sets 2 and 3 used unconsolidated cores.…”

Section: Model Validationmentioning

confidence: 99%

“…show the fitting results for the three experimental sets conducted by Sharma et al (1992). We need to emphasise that the ''best'' match is unique, as there exists a global minimum of AAD that corresponds to just one value of n. However, the global minimum is relatively shallow indicating that the accuracy of the experimental data set will play a major role in determining parameter n. Fig.…”

Section: Figs 1-3mentioning

confidence: 99%

“…The datasets of Kocabas (2003) were analysed in a similar fashion to determine the value of parameter n. However, it should be noted that unlike the experiments of Sharma et al (1992) that evaluated effects of asphaltene content on the damage kinetics in the same core, those of Kocabas (2003) were based on a single asphaltene concentration. Consequently, while the optimisation of n used multiple data points in each of the experiments of Sharma et al (1992), those of Kocabas (2003) were based on single-point.…”

Section: Figs 1-3mentioning

confidence: 99%

“…These include cases of asphaltene suspensions left to "age" in cores (Kocabas, 2003;Sharma et al, 1992). In the study conducted by Sharma et al (1992), the injection of one pore-volume (PV) of asphalted oil and precipitants can be regarded as a batch process (Lawal et al, 2010). Similarly, experimental procedures that involved following a forward-flooding operation with reverse-flooding are also taken to approximate a closed system (Kocabas, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Modelling Asphaltene-Induced Formation Damage in Closed Systems

Lawal

Vesovic

2010

Abu Dhabi International Petroleum Exhibition and Conference

View full text Add to dashboard Cite

This paper implements a simple one-parameter semi-analytic model for asphaltene-induced reduction of porosity, pore-radius and permeability in closed systems. By treating sedimentation as the dominant deposition mechanism, dynamics of asphaltene deposition under "stagnant" conditions is provided, elucidating the dependence of damage rate on the size of asphaltene aggregates as well as rock and fluid properties. Parametric studies indicate that while the rate of formation degradation depends on rock and fluid properties, ultimate severity of impairment is primarily controlled by in-situ asphaltene content. The proposed model has been used to explain the general observation that light oil systems are more vulnerable to asphaltene damage, than the heavy oil systems. Validity of proposed model is demonstrated by comparing with available experimental datasets that include both sandstone and carbonates. In all cases, experimental results have been matched within 7% accuracy using the proposed model with a single adjustable parameter. Furthermore, thermal simulation studies conducted on a hypothetical but representative heavy oil reservoir highlight the detrimental effects of impairment on field-scale oil recovery and thermal efficiency. Both the models and results presented should be useful for studying impairments induced by asphaltene and other deposits.

show abstract

Section: Model Validationmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

Section: Figs 1-3mentioning

confidence: 99%

Section: Figs 1-3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modelling Asphaltene-Induced Formation Damage in Closed Systems

Lawal

Vesovic

2010

Abu Dhabi International Petroleum Exhibition and Conference

View full text Add to dashboard Cite

show abstract

Application of Geostatistics and Conventional Methods to Derive Hydraulic Flow Units for Improved Reservoir Description: A Case Study of Endicott Field, Alaska

Ratchkovski

Ogbe

Lawal

1999

SPE Western Regional Meeting

View full text Add to dashboard Cite

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn this paper, we combine the geostatistical methods of conditional simulation with conventional methods of deriving flow units to characterize a section of the Endicott Field, North Slope of Alaska. Hydraulic flow units are generated using well logs, core data and core descriptions from 10 wells. Geostatistical techniques of sequential Gaussian simulation and sequential indicator simulation were used to obtain equiprobable realizations of the reservoir properties such as porosity and permeability.Conventional interpolation techniques of inverse distance by power and kriging were also applied to describe the distribution of porosity and permeability in the developed flow units model. To validate conventional and geostatistical approaches, the fluid flow simulations of waterflooding were performed in the small section of Endicott Field. Results of the waterflood performance showed that geostatistical models give more detailed description of the reservoir heterogeneities compared to conventional methods.

show abstract

Characterization of oil and gas reservoir heterogeneity

Cited by 2 publications

References 1 publication

Modelling Asphaltene-Induced Formation Damage in Closed Systems

Modelling Asphaltene-Induced Formation Damage in Closed Systems

Application of Geostatistics and Conventional Methods to Derive Hydraulic Flow Units for Improved Reservoir Description: A Case Study of Endicott Field, Alaska

Contact Info

Product

Resources

About