The Paradox of Increasing Initial Oil Production but Faster Decline Rates in Fracking the Bakken Shale: Implications for Long Term Productivity of Tight Oil Plays

Columbu, Stefano; Duncan, Ian

doi:10.31223/x5f30g

Cited by 1 publication

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“…For example, the exploration trend extrapolation method was proposed to predict conventional oil and gas resources by analyzing the discovered oil and gas resource amounts using statistical methods (Sun et al, 2020). The estimated ultimate recovery method was proposed to evaluate tight oil and gas resource by utilizing the regional drilling well amount and oil and gas yields of a single well (Male and Duncan, 2022). The small cell volumetric method divides the evaluation area into many calculation units and calculates the amount of resources in each grid one by one according to the effective thickness, effective porosity and oil saturation of the reservoir, which is applicable to shale petroleum resource evaluation (Guo et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Potential resources of conventional, tight, and shale oil and gas from Paleogene Wenchang Formation source rocks in the Huizhou Depression

et al. 2022

Adv. Geo-Energy Res.

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Conventional and tight unconventional oil and gas resources in the Huizhou Depression have shown broad exploration prospects, which mainly originate from Wenchang Formation source rocks. Thus far, studies on Wenchang Formation source rocks mainly focused on the geochemical characteristics and conventional petroleum resource evaluation; however, the correlation of conventional, tight, and shale oil and gas, and their resources are still unknown. In fact, the formation of conventional, tight, and shale oil and gas are intrinsically related, which allows for a more objective evaluation to consider the three types of oil and gas resources simultaneously in the whole dynamic process of both hydrocarbon generation and expulsion, as well as reservoir tightness history. In this work, based on geological and geochemical analyses, the improved hydrocarbon generation potential method was utilized to establish a hydrocarbon generation and expulsion model of the Wenchang Formation source rocks. Then, combined with the reservoir tightness history, the conventional, tight, and shale oil and gas resources were evaluated. The results show that the Wenchang Formation source rocks are distributed in the whole depressions, with a thickness of 50-1850 m and an average total organic carbon content of 2.2%. The organic matter is mainly type II and is mature-high maturity. The Wenchang Formation source rocks reached hydrocarbon generation threshold and expulsion threshold at a vitrinite reflectivity of 0.43% and 0.65%, respectively, and the reservoir evolved completely tight at 2.3 Ma. Overall, the Lower and Upper Wenchang Formation contain a large amount of conventional, tight, and shale oil and gas resources.

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Section: Introductionmentioning

confidence: 99%

Potential resources of conventional, tight, and shale oil and gas from Paleogene Wenchang Formation source rocks in the Huizhou Depression

et al. 2022

Adv. Geo-Energy Res.

View full text Add to dashboard Cite

show abstract

The Paradox of Increasing Initial Oil Production but Faster Decline Rates in Fracking the Bakken Shale: Implications for Long Term Productivity of Tight Oil Plays

Cited by 1 publication

References 6 publications

Potential resources of conventional, tight, and shale oil and gas from Paleogene Wenchang Formation source rocks in the Huizhou Depression

Potential resources of conventional, tight, and shale oil and gas from Paleogene Wenchang Formation source rocks in the Huizhou Depression

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