| 次生孔隙发育带的概念及石油地质意义新认识 |
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| 引用本文： | 王艳忠,操应长,葸克来.次生孔隙发育带的概念及石油地质意义新认识[J].吉林大学学报(地球科学版),2013,43(3):659-668,679. |
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| 作者姓名： | 王艳忠 操应长 葸克来 |
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| 作者单位： | 中国石油大学地球科学与技术学院，山东 青岛266580 |
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| 基金项目： | 国家自然科学基金项目，国家自然科学基金石油化工联合基金重点项目，国家科技重大专项项目，山东省自然科学基金项目，中央高校基本科研业务费专项资金资助项目 |
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| 摘 要： | 在对次生孔隙带和次生孔隙发育带概念中存在问题分析的基础上，重新阐述了次生孔隙带、次生孔隙发育带、孔隙度高值带、孔隙度低值带等术语的含义，分析了东营凹陷民丰洼陷沙三中-沙四段近岸水下扇砂砾岩储层次生孔隙发育带特征，并探讨了次生孔隙正确识别及次生孔隙发育带对中深层油气勘探的指导意义。次生孔隙应该专指岩石在埋藏过程中形成的新孔隙，在识别储集空间类型时应将原始粒间孔隙和其周围颗粒溶解形成的新孔隙区分为原生孔隙和次生孔隙。次生孔隙带指孔隙度-深度剖面中有次生孔隙发育的带，在纵向上对应于某一深度范围，横向上表现为某一孔隙度区间。次生孔隙发育带指次生孔隙体积分数大于50%的高孔隙度储层集中发育带。次生孔隙发育带包括3层含义：第一，次生孔隙发育带内储层次生孔隙体积分数大于50%；第二，次生孔隙发育带内储层孔隙度高于有效储层孔隙度下限；第三，高孔隙度储层在孔隙度-深度剖面中某一深度范围内集中成带，孔隙度包络线明显向孔隙度高值方向凸出。东营凹陷民丰洼陷沙三中-沙四段近岸水下扇砂砾岩储层纵向上发育4个次生孔隙发育带，其深度分别为2 800~3 500 m、3 750~4 050 m、4 300~4 500 m、4 700~4 900 m。次生孔隙发育带和孔隙度高值带是中深层油气勘探的重要目标，但是，分析认为现今孔隙度CD*2]深度剖面中孔隙度低值带可能是一直被忽视的油气勘探目标。
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| 关 键 词： | 次生孔隙 次生孔隙带 次生孔隙发育带 石油地质意义 东营凹陷 油气 |
| 收稿时间： | 2012-11-08 |
New View on the Concept of Secondary Pore Developing Zones and Its Significance of Petroleum Geology |
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| Wang Yanzhong,Cao Yingchang,Xi Kelai.New View on the Concept of Secondary Pore Developing Zones and Its Significance of Petroleum Geology[J].Journal of Jilin Unviersity:Earth Science Edition,2013,43(3):659-668,679. |
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| Authors: | Wang Yanzhong Cao Yingchang Xi Kelai |
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| Institution: | School of Geosciences, China University of Petroleum, Qingdao266580, Shandong, China |
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| Abstract: | On the basis of the problems existed in analyzing the concepts of secondary pore zone and secondary pore development zone, this study redefined concepts of secondary pore zone, secondary pore development zone, porosity high-value zone and porosity low-value zone, analyzed the characteristics of secondary pore development zone in nearshore subaqueous fans reservoir in the middle part of Es3 to Es4 in Minfeng area, Dongying sag, and discussed the proper way to recognize secondary porosity and its guidance significance in deep oil and gas exploration. Secondary pore refers to the new pore formed during the burying process. Original intergranular pore and the solution pore around it should be distinguished as primary pore and secondary pore when recognizing the types of reservoir pore space. Secondary pore zone is the zone that has secondary pore on porosity depth record section, which corresponds to a depth ranging in vertical, and shows a porosity region horizontally. Secondary pore development zone refers to the high porosity reservoirs that have more than 50% secondary pore. Secondary pore development zone includes three meanings: Secondary pore development zone contains more than 50% secondary pore; The reservoir porosity is higher than the effective reservoir porosity cutoff in the secondary pore development zones; High porosity reservoirs concentrate into belts in a depth range on the porosity-depth record section, with the porosity envelope curve bulges to the porosity high-value zone direction. There are four secondary pore development zones in nearshore subaqueous fans glutenite reservoir in the middle part of Es3 to Es4, Minfeng area, Dongying sag. The depth ranges are 2 800-3 500 m,3 750-4 050 m,4 300-4 500 m,4 700-4 900 m. Secondary pore development zone and porosity high-value zones are the vital targets of the middle and deep oil-gas exploration. However, the authors think that the present porosity low-value zone on porosity-depth record section may be a neglected exploration target. |
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| Keywords: | secondary pore secondary pore zone secondary pore development zone significance of petroleum geology Dongying sag petroleum gas |
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