Reef reservoir and fluid identification technology and its application to no-well deep water area in Western South China Sea

LI Ming; DENG Yong; FAN Caiwei; PAN Guangchao; DANG Yayun

doi:10.16562/j.cnki.0256-1492.2018.06.018

2018 Vol. 38, No. 6

Article Contents

Article navigation > Marine Geology & Quaternary Geology > 2018 > 38(6): 185-191

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LI Ming, DENG Yong, FAN Caiwei, PAN Guangchao, DANG Yayun. Reef reservoir and fluid identification technology and its application to no-well deep water area in Western South China Sea[J]. Marine Geology & Quaternary Geology, 2018, 38(6): 185-191. doi: 10.16562/j.cnki.0256-1492.2018.06.018

Citation:

LI Ming, DENG Yong, FAN Caiwei, PAN Guangchao, DANG Yayun. Reef reservoir and fluid identification technology and its application to no-well deep water area in Western South China Sea[J]. Marine Geology & Quaternary Geology, 2018, 38(6): 185-191. doi: 10.16562/j.cnki.0256-1492.2018.06.018

Reef reservoir and fluid identification technology and its application to no-well deep water area in Western South China Sea

Zhanjiang Branch of CNOOC Ltd., Zhan Jiang 524057, China

Received Date: 20 August 2018

Revised Date: 02 November 2018

Publish Date: 28 December 2018

Abstract

Abstract

Deep-water bioreef reservoirs in the western South China Sea have great oil and gas potential. However, the physical properties of and the fluid in the reef reservoirs remain difficult to be identified though great endeavors have been made by predecessors. In this study, the correlation of seismic reflection characteristics from a point to an area is carried out based on paleo-geomorphological background. Large reefs were found in the stepped Songnan low uplift. As the depth migration velocity is considered, bioreefs should be bounded by high velocity boundaries with an inner part of uneven low velocity. Based on the results of petrophysical forward modeling and semi-quantitative judgment by well-free inversion from Berryman (1992) and Kuster-Toksöz (1974) model, it is found that the reservoirs are dominated by medium-low porosity reefs. Prestack elastic inversion, combined with the pursuit of matching relationship between Vp/Vs attribute anomalies and deep structures, it is predicted that the hydrocarbon-bearing area should be located in the southern part of the reef group. Combining paleo- geomorphology together with seismic velocity, forward and inversion processing, a set of technology system suitable for bioreef reservoir and fluid identification in a well free deepwater areas in the western South China Sea was developed, with which some reef lithologic traps have been found in the Songnan low bulge area of Qiongdongnan Basin.
- reef /
- forward /
- no-well inversion /
- velocity spectrum /
- Vp/Vs

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References

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