| 南方海相天然气保存机理及保存条件初探 |
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| 引用本文： | 付孝悦,Wang Jinyi,张汉荣.南方海相天然气保存机理及保存条件初探[J].海相油气地质,2002,7(2):43-47. |
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| 作者姓名： | 付孝悦 Wang Jinyi 张汉荣 |
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| 作者单位： | 中国石油化工股份有限公司南方勘探开发分公司 |
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| 摘 要： | 地下地质条件下天然气主要以游离气、溶解气、吸附气的形式保存,压力封闭和水(油)溶保存是天然气的主要保存方式。含气系统的保存需要一个立体空间上的封闭保存体系,区域盖层和直接盖层的封存保存功能不同,前者主要是构建一个封闭保存体系,后者直接遮挡或抑制天然气的扩散与渗漏。异常高压带的存在与否和水文地质条件是衡量区域封闭保存体系的两个重要标志。根据南方海相不同区块油气保存特性,划分出持续型(四川盆地型)、重建型(中、下扬子型)和残余型(秧坝型)三类不同的油气保存单元。
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| 关 键 词： | 海相地层 油气藏保存条件 保存机理 封闭保存体系 油气保存单元 中国南方 |
Preservation Mechanisms and Conditions of Natural Gas In Southern China |
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| Fu Xiaoyue,Wang Jinyi,Zhang Hanrong.Preservation Mechanisms and Conditions of Natural Gas In Southern China[J].Marine Origin Petroleum Geology,2002,7(2):43-47. |
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| Authors: | Fu Xiaoyue Wang Jinyi Zhang Hanrong |
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| Abstract: | Under subsurface geologic condition,the natural gas mainly exists as free gas,solution gas and adsorbed gas.The main preservation mechanisms for natural gas are pressure confining or sealing and water(oil)solution preservation.The preserva- tion of petroleum system needs a closed preservation system in three-dimensional space.The sealing and preservation func- tions of regional caps and direct caps are quite different.The former is mainly used for building up a closed preservation sys- tem; the latter is used for directly preventing natural gas from escape or restraining the diffusion and seepage of natural gas. The two important markers for judging regional closed preser- vation system are abnormal high-pressure zone and hydrologi- cal condition.According to hydrocarbon preservation charac- teristics of different marine strata provinces in Southern China, the hydrocarbon preservation units can be divided into three different types,i.e.the inheritance type(such as Type Sichang Basin),reconstruction type(such as Type Central- Lower Yangzi)and remnant type(Type Yangba Basin). |
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| Keywords: | Reservoir preservation condition Reservoir preservation mechanism Closed preservation system Hydrocarbon preservation unit Southern China |
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