| 沉积盆地碎屑岩地层孔隙度演化模型分析——以鄂尔多斯盆地延长组为例 |
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| 引用本文： | 施辉,刘震,潘高峰,胡晓丹.沉积盆地碎屑岩地层孔隙度演化模型分析——以鄂尔多斯盆地延长组为例[J].地质科学,2013,48(3):732-746. |
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| 作者姓名： | 施辉 刘震 潘高峰 胡晓丹 |
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| 作者单位： | 1. 中国石油大学油气资源与探测国家重点实验室 北京 102249;
2. 中国石油天然气集团公司 东方地球物理勘探有限责任公司油藏地球物理研究中心 河北 涿州 072751 |
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| 摘 要： | 碎屑岩地层孔隙度演化特征的研究已经从定性分析向定量化方向发展,掌握了地层孔隙度在地史过程中的演化规律有助于深化油气成藏机理的认识。本文分别以鄂尔多斯盆地镇泾地区延长组8段砂岩和姬塬地区延长组7段泥岩为研究对象,以现今孔隙度特征为切入点,以地史时间为主线,分别建立了适用于砂岩孔隙度和泥岩孔隙度演化的数学模型。砂岩孔隙度演化模型是总体减孔效应和局部增孔效应数学模型的叠加,前者主要受机械压实和化学压实作用的影响,而后者以溶蚀作用为主。泥岩孔隙度是正常压实趋势下孔隙度演化模型与欠压实段孔隙度增量模型的叠加。
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| 关 键 词： | 孔隙度演化 定量模拟 成岩作用 古孔隙度恢复 |
| 收稿时间： | 2012-02-08 |
| 修稿时间： | 2012-02-08; |
Clastic strata porosity evolution model analysis in sedimentary basins |
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| Shi Hui
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Liu Zhen
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Pan Gaofeng
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Hu Xiaodan.Clastic strata porosity evolution model analysis in sedimentary basins[J].Chinese Journal of Geology,2013,48(3):732-746. |
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| Authors: | Shi Hui Liu Zhen Pan Gaofeng Hu Xiaodan |
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| Institution: | 1. National Key Laboratory for Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249;
2. Geophysical Technique Research Centre, Bureau of Geophysical Prospecting, China National Petroleum Corporation, Zhuozhou, Hebei 072751 |
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| Abstract: | It is direction from qualitative analysis to quantitative research for studying clastic strata porosity evolution,kowning well which during geologic process could help to deepen knowledge about hydrocarbon accumulation mechanism.This paper has researched Member 8 sandstones,yanchang Formation in Zhenting area and Member 7 mudstones,Yanchang Formation in Jiyuan area,and has established mathematical models respectively for sandstone and mudstone porosity evolution,with current porosity characteristics as entry point and geologic time as principal line,combining with research of burial and diagenetic history.Sandstone porosity evolution can be divided to total porosity-decreasing in that mainly mechanical compaction and cementation result and regional porosity-increasing in that mainly dissolution result.So having separately established porosity evolution models of decreasing effect and increasing effect,sandstone porosity evolution model is their addition.Exactly mudstone porosity evolution is the composition of porosity-decreasing mathematical model during normal compaction and porosity-increasing mathematical model during undercompaction. |
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| Keywords: | Porosity evolution Quantitative simulation Diagenesis Ancient porosity recovery |
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