中国大中型气田天然气聚集效率及其主控因素

doi:10.11743/ogg20050610

Abstract

Abstract:

Statistics of gas in place,gas-bearing area and reservoiring period of over 60 large and medium gas fields in China show that their accumulation efficiencies vary greatly.China's large and medium gas fields can be classified into 3 types,including high,moderate and low efficiency gas fields,according to their accumulation efficiencies.Gas accumulation efficiency of high efficiency gas fields is over 100?10⁶ m³ /(Ma·km²),that of moderate efficiency gas fields is in the range of 10?10⁶-100?10⁶ m³ /(Ma·km²),and that of low efficiency gas fields is below 10?10⁶ m³ /(Ma·km²).The gas accumulation efficiencies of China's large and medium gas fields are mainly controlled by gas generating intensity of source rocks,gas delivery rate,sealing(ability)and timing of gas reservoiring period.The larger gas generating intensity,higher gas delivery speed,larger comprehensive sealing index of cap rocks(CSI),and later gas reservoiring period would lead to higher gas accumulation efficiency,and vice versa.

Key words: accumulation efficiency, gas generating intensity, delivery rate, sealing ability, reservoiring period, large and medium gas fields

CLC Number:

TE11

Fu Guang, Lu Yanfang, Yu Dan. Gas accumulation efficiency and its main controlling factors in China's large and medium gas fields[J]. Oil & Gas Geology, 2005, 26(6): 754-759.

References

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Gas accumulation efficiency and its main controlling factors in China's large and medium gas fields

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