Distribution and resource evaluation of natural gas hydrate in South China sea by combing phase equilibrium mechanism and volumetric method

Wang, Tong; Hu, Tao; Pang, Xiongqi; Zhang, Xingwen; Liu, Xiaohan; Xu, Zhi; Wang, Enze; Wu, Zhuoya

doi:10.1016/j.petsci.2021.12.003

Cited by 14 publications

(25 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al used the volume method to evaluate the potential of NGH resources in the SCS (T. Wang et al, 2021) according to the conditions of ‘high pressure and low temperature’ for the formation of NGHs, as well as the compositional characteristics of the NGH drilling and mining samples in the Shenhu area. The phase equilibrium formula was used to calculate the effective thickness of the SCS NGH formation and obtain the plane distribution characteristics (Figure 4).…”

Section: Status Of Exploration and Evaluation Of Nghmentioning

confidence: 99%

“…Formula () was the obtained evaluation formula of the optimized volume method, and Monte Carlo simulation technology was used to obtain the NGH resources in the SCS (Figure 1). There are nine factors in the formula, but T. Wang et al (2021) did not compare and analyse the influence of the value of each parameter on the final result.

TRR = S_{GHSZ} \times K_{GH - S} \times H_{GHSZ} \times K_{GH - H} \times P_{GH} \times S_{GH} \times E \times R_{GH} \times K_{RE} z,

where TRR refers to technically recoverable resources, in m 3 ; S GHSZ is the NGH distribution area, in m 2 ; K GH‐S refers to the area coefficient of NGHs in the GHSZ; H GHSZ is the effective thickness of the GHSZ, in m; K GH‐H is the thickness coefficient of NGHs in the GHSZ; P GH is the porosity of the NGH reservoir, in %; S GH is the NGH saturation, in %; E is the NGH volumetric ratio; R GH is the NGH resource coefficient obtained in the Shenhu area, referring to the percentage of the total NGHs that is enriched for recoverable resources; and K RE refers to the recovery coefficient.…”

Section: Status Of Exploration and Evaluation Of Nghmentioning

confidence: 99%

“…Some researchers (X. H. Liu et al, 2021; T. Wang et al, 2021; Xu et al, 2021; X. W. Zhang et al, 2021) conducted the latest evaluation of the NGH resources in the SCS. T. Wang et al (2021) optimized the volume method, which is commonly used in the evaluation of NGH resources and collected all the data required for NGH evaluation obtained from various exploration projects in the SCS that included six drilling and two test productions (Boswell & Collett, 2011; Fang et al, 2001; Pang et al, 2021; Qin et al, 2020; T. Wang et al, 2021; Z. M. Wang, Qu, & Jian, 2010; X. J. Wang, Wu, et al, 2010; S. X. Yang et al, 2017). Their range of variation is shown in Table 1, which improved the accuracy of the volumetric method.…”

Section: Introductionmentioning

confidence: 99%

“…The results obtained by Monte Carlo simulations (Figure 1) are quite different from those of previous studies, and the results are approximately 13%–20% of the results of the average evaluation of the previous 35 groups of other scholars (Pang et al, 2021). T. Wang et al (2021) explained the main factor controlling each evaluation that affects the evaluation results and provided their range of variation, but they did not evaluate the sensitivity of the obtained resource results. More research is needed on the differences in the influence of the main controlling factors on the evaluation results.…”

Section: Introductionmentioning

confidence: 99%

“…Monte Carlo simulation results of in‐place natural gas hydrate resources in the South China Sea (T. Wang et al, 2021). …”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Sensitivity analysis of the main factors controlling the potential volumetric evaluation of natural gas hydrate resources in the South China Sea

Wang

Pang

et al. 2023

Geological Journal

Self Cite

View full text Add to dashboard Cite

The China Geological Survey successfully completed the second trial of natural gas hydrate (NGH) production in 2020, and the daily gas production and total gas production were greater than those in the first trial, but the evaluation of NGH resources in the South China Sea (SCS) is still in the evaluation stage, specifically for the gas content. In 2021, some scholars used different methods to more accurately evaluate NGHs in the SCS to aid in NGH exploration and evaluation in the SCS; some of them analysed the main factors controlling NGH resources, added several factors to the volume method for optimization, studied the sensitivity of the evaluation of resources to each of the main controlling factors (NGH stability zone area, NGH area coefficient, NGH stability zone thickness, NGH thickness coefficient, NGH reservoir porosity, NGH reservoir saturation, NGH volumetric ratio, NGH resource ratio coefficient and NGH recovery coefficient) and found that the effective thickness coefficient, effective thickness and effective area coefficient are the most sensitive; these values are 23.15%, 15.66%, 13.98%, and 13.95%, respectively, while the other values are 0%, 15.66%, 8.42%, 8.41%, 2.50%, and 13.92%; taking into account the influence of the main controlling factors, the range of the water resource potential evaluation results in the SCS is 2.4 × 107 m3–5.9 × 1014 m3, the modal value is 7.25 × 1011 m3, and the confidence level of the modal ±25% interval is 77.8%; these values provide a higher evaluation accuracy and higher resource level, which is consistent with the current results of NGH research in the SCS. Although the development of NGHs in the SCS is progressing rapidly, basic exploration is relatively scarce, and the number of samples of effective thickness obtained through dozens of exploratory wells is too few. It is recommended that China carry out more exploration and research projects in the Shenhu area and the entire SCS to obtain more accurate thickness data.

show abstract

Section: Status Of Exploration and Evaluation Of Nghmentioning

confidence: 99%