Distribution and potential of global oil and gas resources

Tong, Xiaoguang; Zhang, Guangya; Wang, Zhaoming; Wen, Zhaofei; Tian, Zuo-ji; Wang, Hongjun; Ma, Feng; Wu, Yiping

doi:10.1016/s1876-3804(18)30081-8

Cited by 155 publications

(48 citation statements)

References 4 publications

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“…UHR are located worldwide in 476 formations and 363 oil and gas basins in 60 countries. The recoverable oil resources in the world account for 30,855x10 8 barrels (billion barrels, Bb) and 6,900x10 12 cubic feet (trillion cubic feet, Tcf) of natural gas, excluding gas hydrates (2,8).…”

Section: Unconventional Potentialmentioning

confidence: 99%

Critical factors for unconventional hydrocarbon resources development

Bravo

Hernández

2021

CT&F Cienc. Tecnol. Futuro

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Countries all over the world struggle to exploit their Unconventional Hydrocarbon Resources (UHR) to secure energy supply, but only a few of them have succeeded. Regulators and decision-makers should understand the critical factors required for companies to attract capital, technology, and good practices to promote innovation and generate the virtuous cycle that translates into sustainable production. This study seeks to identify the most relevant factors for UHR commercial development. We assessed the UHR exploiting state in 60 countries and identified the critical common development factors for the 22 that are most active. The proposed Unconventional Hydrocarbon Development Index (UDI) allows to model, rank, benchmark, and forecast UHR development activity for any given country. We focused on the case of Colombia to illustrate the validity of this Index. Evidence suggests countries where National Oil Companies (NOCs) address the challenge of exploiting UHR on their own, may lack the required expertise, despite having governmental support and capital availability. It is easier for them to emulate resilient North American firms exploiting UHR by partnering with them to effectively incorporate best practices Governments can facilitate the process through UHR support, surface and subsurface risk reduction, a proper tax regime, and ESG practice promotion.

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Section: Unconventional Potentialmentioning

confidence: 99%

Critical factors for unconventional hydrocarbon resources development

Bravo

Hernández

2021

CT&F Cienc. Tecnol. Futuro

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“…They are one of the important factors affecting the oil-bearing property of tight oil reservoirs. For this reason, studying the natural fractures in tight reservoirs is highly instructive for the efficient development of tight oil reservoirs [4]. Bedding fractures are strongly associated with hydrocarbon generation and migration in tight reservoirs.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, it is a very important tight oil reservoir in China [19,36,37]. Over the past few years, industrial oil flows have been yielded from a number of 2 Geofluids boreholes in Jimsar sag, demonstrating vast exploration and development potential [1,4,19]. Tight oil reservoirs are low-porosity, low-permeability reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Research on the Oil-Bearing Difference of Bedding Fractures: A Case Study of Lucaogou Formation in Jimsar Sag

Zhang

Zeng

et al. 2021

Geofluids

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Lucaogou formation in Jimsar sag is host to large quantities of bedding fractures which are known to play a critical role in the enrichment, accumulation, and efficient development of tight oil. In this paper, we examine and finely characterize the development of the bedding fractures found in the upper and lower sweet spots of Lucaogou formation of tight oil reservoir through field outcrop and core observation, cast thin section analysis, and imaging log recognition and investigate the factors affecting their differentiated oil-bearing by means of inclusion temperature measurement, TOC testing, physical property testing, high-pressure mercury injection, and physical simulation experiment. By comparison with the linear density, bedding fractures are more developed in the lower sweet spot. These fractures occur in parallel to the formation boundary and have small aperture. Most of bedding fractures are unfilled fractures. Among the few types of fractures found there, bedding fractures have the best oil-bearing property, but the oil-bearing can differ from one bedding fracture to another. The factors affecting the differentiated oil-bearing of bedding fractures include the temporal coupling of the formation of these fractures with the hydrocarbon generation of the source rocks and the spatial coupling of the bedding fractures with the source rocks. In terms of temporal coupling, mass hydrocarbon generation in Jimsar sag began in Late Jurassic. Inclusion temperature measurement indicates that the bedding fractures there formed in or after Early Cretaceous. Hence, by matching the mass hydrocarbon generation period of the source rocks with the formation period of the bedding fractures, we discovered that the bedding fractures formed within the mass hydrocarbon generation period, which favored the oil-bearing of these fractures. The spatial coupling is manifested in TOC, porosity, permeability, and pore throat, with TOC being the main controlling factor. For TOC, the higher the formation TOC, the better the oil-bearing property of the bedding fractures. For porosity, subject to the TOC level, if the TOC is adequate, the larger the porosity, the larger the chloroform asphalt “A,” accordingly the higher the oil content of the formation, and the better the oil-bearing property of the bedding fractures developed therein. In this sense, in terms of spatial coupling, TOC constitutes the main controlling factor of the oil-bearing property of bedding fractures.

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“…The oil sands or tar sands, which play an important role in the world energy market, are one typical unconventional hydrocarbon resource [1,2]. Large amount of oil sand reservoirs is found and in production in Athabasca, Cold Lake, and Peace River, northeastern Alberta, Canada [3,4].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Characterization of Tidal Couplets in Oil Sands Reservoir, the Upper McMurray Formation, Northeastern Alberta, Canada

et al. 2021

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The McMurray Formation, NE Alberta, Canada, is one of the most significant bitumen bearing deposits worldwide. This formation deposited and reworked in fluvial, tidal, or estuarine environments results in a huge number of tidal couplets (TCs) which is consisted of mm-cm scale sandy and muddy interlayers. These couplets not only increase the geologic heterogeneity of the oil sand reservoir but also make it hard to predict the performance of in situ thermal processes. In this paper, based on literatures, lab analysis, core photos, logging, and drilling data, a quantitative characterization procedure for mm-cm scale tidal couplets was proposed. This procedure, which includes identification, classification, quantitative description, and spatial distribution prediction, was presented. Five parameters, thickness, mud volume, laminae frequency, spatial scale, and effective petrophysical properties, were selected to describe the TCs quantitatively. To show the procedure practically, TCs in the oil sand reservoir of McMurray Formation, Mackay River Project, and CNPC, were selected to demonstrate this procedure. The results indicate that the TCs are in mm-cm thickness, densely clustered, and in a variety of geometries. Based on geologic origins, these couplets were divided into four types: tidal bar couplets (TBCs), sand bar couplets (SBCs), mix flat couplets (MFCs), and tidal channel couplets (TCCs). The thickness, mud volume, and frequency were calculated by mathematical morphological processed core photos. The spatial scale of TCs was estimated by high-density well correlations. The effective petrophysical properties were estimated by bedding scale modeling and property modeling via REV. Finally, the spatial distribution of TCs was predicted by object-based modeling.

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Distribution and potential of global oil and gas resources

Cited by 155 publications

References 4 publications

Critical factors for unconventional hydrocarbon resources development

Critical factors for unconventional hydrocarbon resources development

Research on the Oil-Bearing Difference of Bedding Fractures: A Case Study of Lucaogou Formation in Jimsar Sag

Quantitative Characterization of Tidal Couplets in Oil Sands Reservoir, the Upper McMurray Formation, Northeastern Alberta, Canada

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