Compartmentalization or gravity segregation? Understanding and predicting characteristics of near-critical petroleum fluids

Páez, Rachel Hannah; Lawerence, John J.; Zhang, Mei

doi:10.1144/sp347.4

Cited by 8 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, Paez et al (2010) showed that if the fluids are in a critical or near-critical state, they can be gravity segregated, such that wells within a connected reservoir might give different PVT values suggestive of compartmentalization.…”

Section: Mitigation Technologies and Industry Methods For Estimating mentioning

confidence: 99%

Stratigraphic reservoir compartmentalization: causes, recognition, and implications for the geological storage of carbon dioxide

Herringshaw¹,

Gluyas²,

Mathias³

2019

Preprint

View full text Add to dashboard Cite

The impact of carbon capture and storage (CCS) in mitigating anthropogenic emissions of greenhouse gases is potentially great, but its success is strongly dependent on identifying suitable geological storage sites. One of the key uncertainties in this regard is the degree of compartmentalization of the target storage horizon. Many studies have examined reservoir compartmentalization in oil and gas fields and its implications to hydrocarbon production, but few have looked at compartmentalization from the perspective of CCS storativity. Using case studies from the oil and gas industry, this paper examines the predictability of reservoir compartmentalization and the techniques used to assess it. It then focusses on stratigraphic compartmentalization in saline aquifers, a major category of potential carbon storage sites, examining in particular the Triassic Bunter Sandstone Formation of the UK North Sea. It is clear that the analysis of stratigraphic, seismic and fluid compositional data can provide early evidence of reservoir compartmentalization. The available data indicate that the Bunter Sandstone has a low risk of stratigraphic and structural compartmentalization. However, the presence of compartments in oil and gas fields is often confirmed only once well production data are available. As such, though the broad likelihood of compartmentalization in a CCS site can be forecasted, understanding its exact nature may be dependent on injection data.

show abstract

Section: Mitigation Technologies and Industry Methods For Estimating mentioning

confidence: 99%

Stratigraphic reservoir compartmentalization: causes, recognition, and implications for the geological storage of carbon dioxide

Herringshaw¹,

Gluyas²,

Mathias³

2019

Preprint

View full text Add to dashboard Cite

show abstract

“…A number of tools exist for assessing compartmentalization in producing reservoirs (e.g., seismic amplitude vs. offset analysis, geochemical data, pressure analysis, tracer injection; cf. Smalley & Hale 1996;Calvert 2005;Páez et al 2010). Yet, it is claimed that the diagnosis of compartmentalization in early stages of field development likely improves management throughout a field lifecycle (Smalley & Hale 1996;Fox & Bowman 2010;Smalley & Muggeridge 2010): hence, there is need for empirical knowledge of reservoir architectures that can be used to make pre-drill predictions and to inform development plans.…”

Section: Summary Limitations and Other Applicationsmentioning

confidence: 99%

Geometry and compartmentalization of fluvial meander-belt reservoirs at the bar-form scale: Quantitative insight from outcrop, modern and subsurface analogues

Colombera

Mountney

Russell

et al. 2017

Marine and Petroleum Geology

View full text Add to dashboard Cite

The preserved deposits of fluvial meander belts typically take the form of patchworks of sand-prone bar-form elements bordered by genetically related, muddy channel fills. In meander belts that act as hydrocarbon reservoirs, characteristics of sedimentary architecture, including the geometry of point-bar elements and the internal compartmentalization exerted by the presence of mud-prone abandoned channel fills, control the effectiveness of primary and enhanced hydrocarbon recovery. Therefore, a quantitative description of meander-belt architectures is desired to provide constraints to subsurface predictions.To this end, an examination of sedimentological datasets, enabled by database-assisted analysis, is undertaken. Sixty-four database case studies of modern, ancient outcropping and subsurface fluvial depositional systems are characterized in a quantitative manner, to assess the relative importance of different styles of lithological compartmentalization, and to provide constraints that can be applied to inform predictions of the geometry and connectivity of bar-scale sandbodies in meander-belt reservoirs. The results of this study include: (i) a set of empirical relationships that relate dimensional parameters describing the geometry of point-bar elements, associated channel fills, channel complexes and potentially unswept compartments; (ii) probabilistic descriptions that relate well density to both the proportion of compartments intersected by a well array, and the maximum volume of untapped bar-form compartments.The resulting predictive tools can be applied to assist reservoir development and production, either directly or through incorporation into reservoir models. For example, it is shown how to use these quantitative constraints to predict the likely volume of point-bar reservoir compartments with potential bypassed hydrocarbons, and to optimize drilling strategies (e.g., whether and how to perform infill drilling or horizontal drilling), by providing a measure of the likely presence, size, spacing, and orientation of bypassed hydrocarbon volumes.

show abstract

“…In several papers, various methods have been used to evaluate reservoir continuity such as formation of water analysis (Gill et al 2010), geochemical fingerprinting (Kaufman et al 1990;Hwang and Baskin 1994;Smalley and Hale 1996), gas geochemistry (Beeunas et al 1999;Levachéet et al 2000;Márquez et al 2013), structural and stratigraphic continuity (Hovadik and Larue 2010), Fourier transform infra red (FTIR) and synchronous ultra violet fluorescence (SUVF) spectroscopy (Permanyer et al 2002(Permanyer et al , 2007 and formation pressure measurements (Páez et al 2010). However, in the recent years, the assessment of reservoir continuity using integrating geochemical and reservoir engineering approach has not been well documented.…”

Section: Introductionmentioning

confidence: 99%

Integrating geochemical and reservoir engineering approach to evaluate reservoir continuity: A case study from Foroozan field, Offshore Iran

et al. 2019

View full text Add to dashboard Cite

The purpose of this study was to identify intra-reservoir compartmentalisation using geochemical and reservoir engineering evidences. On the basis of this approach, 11 gaseous samples, which belong to different wells producing from the Burgan reservoir of Foroozan field, were selected. Gas composition, gas isotopes and associated oil bulk properties were tested to determine the reservoir continuity through the Burgan reservoir. In addition, fluid contacts and properties are also used to investigate reservoir continuity. Regarding clear differences in gas composition such as hydrogen sulphide concentrations, at least two separate segments in the north and south of the reservoir were detected. Moreover, the percentages of the different gas components indicated two separate compartments. Other evidences such as C 1-C 4 alkane isotopic compositions and sulphur and nitrogen isotopic signatures confirmed the Burgan reservoir compartmentalisation. A number of petroleum bulk properties confirmed gradual variations that provide supplementary evidence on the reservoir-filling direction, signifying that fluids equilibrium had not been extended through the Burgan reservoir, laterally. Initial reservoir condition, different original water-oil contacts, solution gas-oil ratio at original pressure and bubble point pressure are other reservoir engineering evidences that support the Burgan reservoir compartmentalisation.

show abstract

Compartmentalization or gravity segregation? Understanding and predicting characteristics of near-critical petroleum fluids

Cited by 8 publications

References 5 publications

Stratigraphic reservoir compartmentalization: causes, recognition, and implications for the geological storage of carbon dioxide

Stratigraphic reservoir compartmentalization: causes, recognition, and implications for the geological storage of carbon dioxide

Geometry and compartmentalization of fluvial meander-belt reservoirs at the bar-form scale: Quantitative insight from outcrop, modern and subsurface analogues

Integrating geochemical and reservoir engineering approach to evaluate reservoir continuity: A case study from Foroozan field, Offshore Iran

Contact Info

Product

Resources

About