| 一种缝洞型碳酸盐岩储层胶结指数m计算新方法 |
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| 引用本文： | 田瀚,沈安江,张建勇,冯庆付,王慧,辛勇光,李文正,李昌,田明智,张豪.一种缝洞型碳酸盐岩储层胶结指数m计算新方法[J].地球物理学报,2019,62(6):2276-2285. |
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| 作者姓名： | 田瀚 沈安江 张建勇 冯庆付 王慧 辛勇光 李文正 李昌 田明智 张豪 |
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| 作者单位： | 1. 中国石油杭州地质研究院, 杭州 310023;2. 中国石油天然气集团公司碳酸盐岩储集层重点实验室, 杭州 310023;3. 中国石油勘探开发研究院, 北京 100083 |
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| 基金项目： | 国家科技重大专项"大型油气田及煤层气开发"（2017ZX05008-005）和中国石油科技部重点项目"深层-超深层油气富集规律与区带目标评价"（2018A-0105）资助. |
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| 摘 要： | 碳酸盐岩储集空间类型多样、孔隙结构复杂,具有很强的非均质性,使得传统的阿尔奇公式应用效果不佳,主要原因之一在于胶结指数m的无法准确确定.基于多孔介质理论,在深入分析不同孔隙空间对储层导电贡献外,进一步考虑了孔隙形态对导电性能的影响,尤其是裂缝倾角,进而给出了全新的计算胶结指数m的方法,并深入剖析组成碳酸盐岩复杂孔隙空间的各部分对胶结指数m的影响.认为对于物性较差的缝洞型储层,裂缝倾角对胶结指数m的影响很大,当裂缝角度较小时,裂缝会使胶结指数m变小,而当裂缝角度较大时,裂缝反而会使胶结指数m变大;当储层物性很好时,裂缝倾角的影响则可以忽略.实际应用表明,利用基于裂缝倾角的多孔介质模型得到的胶结指数m所计算的含水饱和度精度相比传统方法有较大提高,且该方法适用于任何类型的储层,具有很好的应用性.
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| 关 键 词： | 碳酸盐岩储集层 胶结指数 含水饱和度 多孔介质模型 |
| 收稿时间： | 2017-10-09 |
New calculation method of cementation exponent m for crack-vuggy carbonate reservoirs |
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| TIAN Han,SHEN AnJiang,ZHANG JianYong,FENG QingFu,WANG Hui,XIN YongGuang,LI WenZheng,LI Chang,TIAN MingZhi,ZHANG Hao.New calculation method of cementation exponent m for crack-vuggy carbonate reservoirs[J].Chinese Journal of Geophysics,2019,62(6):2276-2285. |
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| Authors: | TIAN Han SHEN AnJiang ZHANG JianYong FENG QingFu WANG Hui XIN YongGuang LI WenZheng LI Chang TIAN MingZhi ZHANG Hao |
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| Institution: | 1. Petrochina Hangzhou Research Institute of Geology, Hangzhou 310023, China;2. CNPC Key Laboratory of Carbonate Reservoirs, Hangzhou 310023, China;3. Petrochina Research Institute of Petroleum Exploration and Development, Beijing 100083, China |
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| Abstract: | Carbonate reservoirs have various types and complex pore structures. Due to their strong heterogeneity,the application effect of Archie formula in carbonate reservoirs is not good. One of the main reasons is that the cementation exponent m cannot be accurately determined. To solve this problem, based on porous media theory,this paper considers the contribution of different pore spaces to the conductivity of reservoirs as well as the influence of space forms,especially the crack dip, on the reservoir's conductivity. Then a new method for calculating the cementation exponent m is established,and the influence of various parts of the complex pore space of carbonate reservoirs on the cementation exponent m is analyzed. Results suggest that the crack dip has a great influence on the cementation exponent m for the carbonate reservoirs with poor physical property. When this angle is low,the crack can make the cementation exponent smaller,and when the crack dip angle is high,the crack will make the cementation exponent bigger. But when the physical property is good,the influence of the crack dip can be neglected. Actual application shows that the calculation of water saturation by using the porous medium model based on crack dip is more accurate compared with the traditional methods,and this method is applicable to any type of reservoirs. |
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| Keywords: | Carbonate reservoirs Cementation exponent Water saturation Porous medium model |
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