The Sealing Efficiency for N atural Gas by the Hydrocarbon Concentration Caprock and Its Significance
- Received Date: 1995-05-24
- Publish Date: 1997-03-10
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Key words:
- hydrocarbon concentrati on caprock /
- sealing efficiency /
- formation period of sealing ability /
- gas expulsion period of source rock /
- Qingsankou formation /
- Jurassic system
Abstract: Bused 0n the sealing mechanism of the hydrocarbon concentration caprock and its geological condi-ti on s, and bymeans of determiing the period that the sealing ability of hydrocarbon concentration caprock formedsource rocks, and investigating the matching relationship of that with the gas expulsion period ofauthors have disscussed the sealing efficiency of the hydrocarbon concentrationcaprock, i. e.，only the sealing period is earlier than or near the expulsion period of sourcerocks can the hydrocarbon concentration caprock seal the gas expelled by source rocks in diffusive phase,if notthe sealing efficiency of the hydrocarbon concentratio n caprock is bad. This paper analysed the efficiencyof the hydrocarbon concentration caprock of the Qingsankou formation mudstone which seals the gasfrom Jurassic system and expounded the significance of sealing efficiency in the evaluation of gasprospectrve resources.
| Citation: | Fu Guang, Chen Zhangming, . The Sealing Efficiency for N atural Gas by the Hydrocarbon Concentration Caprock and Its Significance[J]. Acta Sedimentologica Sinica, 1997, 15(1): 141-151.
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