| 不整合运移通道类型及输导油气特征 |
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| 引用本文： | 高长海,查明.不整合运移通道类型及输导油气特征[J].地质学报,2008,82(8):1113-1120. |
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| 作者姓名： | 高长海 查明 |
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| 作者单位： | 中国石油大学(华东)地球资源与信息学院,山东东营,257061 |
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| 基金项目： | 本文为国家自然科学基金项目(编号40102008)、中石化股份有限公司重点科技攻关项目(编号2004KY10031)、中石油股份有限公司科技攻关项目(编号2006技4681)资助的成果。 |
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| 摘 要： | 在对不整合空间结构特征研究的基础上，提出了油气沿不整合运移的通道类型:宏观上，存在由不整合面之上底砾岩和不整合面之下半风化岩石两种高效运载层组合成的双运移通道型和单运移通道型两种通道类型；微观上，底砾岩连通孔隙、半风化岩石构造卸荷风化裂缝系统及溶蚀孔洞系统可作为油气运移的主要通道。通过对不整合面上、下岩石物性分析，认为半风化岩石“孔洞缝”系统较底砾岩连通孔隙有更高的输导油气的能力。研究结果表明，不同的运移通道类型具有不同的输导油气特征。在地史时期，构造裂缝系统和溶蚀孔洞系统一直是不整合输导油气的主要通道；对于软地层构成的不整合来说，开始应是卸荷、风化裂缝系统和底砾岩连通孔隙共同构成不整合输导油气的主要通道，当上覆沉积载荷达到一定程度后，主要是底砾岩连通孔隙起输导油气通道作用；对于脆硬地层构成的不整合来说，卸荷、风化裂缝系统和底砾岩连通孔隙一直是不整合输导油气的主要通道。
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| 关 键 词： | 不整合 空间结构 运移通道类型 输导特征 |
| 收稿时间： | 1/8/2008 12:00:00 AM |
| 修稿时间： | 6/3/2008 12:00:00 AM |
The Types of Unconformity Migration Passages and Characteristics of Hydrocarbon Transport |
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| GAO Changhai,ZHA Ming.The Types of Unconformity Migration Passages and Characteristics of Hydrocarbon Transport[J].Acta Geologica Sinica,2008,82(8):1113-1120. |
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| Authors: | GAO Changhai ZHA Ming |
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| Abstract: | Based on the study of the spatial structural characteristics of unconformity,this paper has recognized two kinds of unconformity migration passages,dual migration passage consisting of two types of highly effective transport passages,and single migration passage. The dual migration passage occurs between conglomerate underlying unconformable surface and overlying half-weathered rock. The pores connected to the bottom conglomerate,fissure system formed by half-weathered structural rock and discharge,and weathered solution pore can be regarded as the major passages for hydrocarbon transport. Petrochemical analysis on these rocks from unconformities suggests that the half-weathered "pore-cavity-fissure" system is more capable than the pores connected to the bottom conglomerate in oil transport. The result shows that different migration passages characterize oil transport. During the whole history of earth development,structural fracture system and dissolved pores have been major channels for unconformity oil transport. For the uncomformity formed by soft formation,discharge and weathered-fracture system and pores connected to the bottom conglomerate are the main migration passage; when overlying sediments reach to a certain thickness,the pores connected plays major role in oil transport. For the uncomformity formed by hard formation,discharge-weathered fracture system and pores connected to the bottom conglomerate are the main migration passare way. |
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| Keywords: | unconformity spatial structure types of migration passway transportation characteristic |
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