Multiphase natural gas migration and accumulation and its relationship to diapir structures in the DF1-1 gas field, South China Sea

Huang, Baojia; Xiao, Xia; Dong, Weiliang

doi:10.1016/s0264-8172(02)00109-5

Cited by 30 publications

(16 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of CO 2 gas appears to have an inorganic origin formed by thermal decomposition of calcareous shales with a burial depth of over 6 000 m, and pre-Tertiary carbonates in the basin (Huang et al, 2002). This observation is in accord with results from pore waters.…”

Section: Implications Of Pore Water Geochemi-stry On Expulsion Of Ovesupporting

confidence: 80%

“…Studies analyzing gas composition and isotopic data in the DF11 diapiric structure were carried out in 2002 and 2000 (Huang et al, 2002;Hao et al, 2000). Their results indicated multiple episodic hot fluid expulsions and associated gas infillings.…”

Section: Implications Of Pore Water Geochemi-stry On Expulsion Of Ovementioning

confidence: 99%

“…Their results indicated multiple episodic hot fluid expulsions and associated gas infillings. For example, distinct composition of gases and associated isotopic data were present in different natural gas migration period in the DF11 diapiric structures (Huang et al, 2003(Huang et al, , 2002Hao et al, 2000). Methane-dominant gases with a small amount of organic CO 2 accumulated firstly, and CO 2 -rich gases injected into the reservoir later.…”

Section: Implications Of Pore Water Geochemi-stry On Expulsion Of Ovementioning

confidence: 99%

“…The Yinggehai Basin is a unique location with strong activity of hot fluid flow along vertical faults near mud diapiric structures from deeper, overpressured compartments (Wan et al, 307 2012;Xie et al, 2003). Episodic expulsion of hot, overpressured fluids in diapiric structures has also been shown with multiple hydrocarbon filling, as in the DF1-1 gas field (Huang et al, 2002;Hao et al, 2000) as well as strong thermal anomalies (Xie et al, 2001). Recently, an additional 7 wells were drilled in the diapiric area of the Yinggehai Basin, providing a new database for interpreting the geochemical evolution of pore waters associated with abnormally pressured sediments.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Geochemistry of pore water and associated diagenetic reactions in the diapiric area of Yinggehai Basin, northwestern South China Sea

et al. 2015

View full text Add to dashboard Cite

This study examined the geochemical features of pore water in the diapiric area of the Yinggehai Basin, northwestern South China Sea, and illuminated the origin and evolution of basin fluids. Pore water with low salinity occurs in marine sediments in the diapiric area even without meteoric water infiltration. The presence of low-salinity water within deep, overpressured compartments is assumed to be due to smectite-illite transformation. Howerver, in shallow portions (less than 2 000 m) of diapiric areas with normal pressure, pore water has a much wider variation and much lower salinity than that in the overpressured intervals. Its total dissolved solid (TDS) content is ~5 336 to 35 939 mg/L. Moreover, smectite and chlorite content sharply decreases as kaolinite and illite content increase in shallower intervals. The geochemical variation of pore water in diapiric structures indicates the expulsion of low-salinity, overpressured fluids along vertical faults. Strong injection of hot fluids from deep overpressured sediments results in rapid clay mineral transformation in shallow reservoirs. Consequently, fluid mixing due to fluid expulsion from deeper overpressured deposits leads to variation in salinity and ionic composition as well as some diagenetic reactions. This includes transformation of clay minerals caused by the higher temperatur of deeper hot fluids, e.g., the transfromation of smectite to illite and chlorite to kaolinite. Therefore, variations in salinity and ionic compositions in various pressured systems provide a clue to flow pathways and associated diagenetic reactions.

show abstract

Section: Implications Of Pore Water Geochemi-stry On Expulsion Of Ovesupporting

confidence: 80%

Section: Implications Of Pore Water Geochemi-stry On Expulsion Of Ovementioning

confidence: 99%

Section: Implications Of Pore Water Geochemi-stry On Expulsion Of Ovementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Geochemistry of pore water and associated diagenetic reactions in the diapiric area of Yinggehai Basin, northwestern South China Sea

et al. 2015

View full text Add to dashboard Cite

show abstract

“…. Based on earlier studies Huang et al, 2002Huang et al, , 2004Liu et al, 2004), CO 2 in the Yinggehai Basin appears to be inorganic in origin, formed from high temperature thermal decomposition of calcareous shales with deep burial in the Tertiary strata and pre-Tertiary carbonates in the basement. In contrast, CO 2 in the PRMB and Qiongdongnan basins are thought to have a mixed mantle and crustal origin Lai, 1994).…”

Section: Introductionmentioning

confidence: 93%

Occurrence and origin of carbon dioxide in the Fushan Depression, Beibuwan Basin, South China Sea

Wang

Ju³

et al. 2008

Marine and Petroleum Geology

View full text Add to dashboard Cite

References

2011

Economic Geology Principles and Practice

View full text Add to dashboard Cite

show abstract

Multiphase natural gas migration and accumulation and its relationship to diapir structures in the DF1-1 gas field, South China Sea

Cited by 30 publications

References 7 publications

Geochemistry of pore water and associated diagenetic reactions in the diapiric area of Yinggehai Basin, northwestern South China Sea

Geochemistry of pore water and associated diagenetic reactions in the diapiric area of Yinggehai Basin, northwestern South China Sea

Occurrence and origin of carbon dioxide in the Fushan Depression, Beibuwan Basin, South China Sea

References

Contact Info

Product

Resources

About