Classification Evaluation and Application of Heterogeneous Reservoirs Based on Improved Capillary Pressure Curve

doi:10.3969/j.issn.1006-6535.2022.02.019

Abstract

Abstract: In view of the strong heterogeneity of the fine reservoir development, taking reservoirs in Qianjiang Formation, Jianghan Basin as the study object, a classification evaluation system of reservoir quantitative indicators was established in combination with the characteristic parameters of improved capillary pressure curve and the basic core parameters, and the effective reservoir thickness was organically combined with logging curve to develop a new method of normalization of capillary pressure curve family. The results showed that the classification evaluation system of reservoir quantitative indicators based on the improved capillary pressure curve mainly included five quantitative indicators: permeability, starting pressure, transitional pressure, median pressure and proportion; the reservoirs in Qianjiang Formation were subdivided into Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ and Ⅵ types; Types Ⅰ and Ⅱ were the reservoirs with the best permeability, accounting for 41.17% of the all reservoirs, Types Ⅲ and Ⅳ were mainly the reservoirs with medium and low permeability, accounting for more than 50.00%, Types V and VI were the reservoirs with extra (super) low permeability, accounting for only 7.77%; the normalization method of capillary pressure curve family based on effective thickness was simple in calculation and low in errors, providing a basis for the characterization and comparison of reservoir characteristic parameters after reservoir classification and evaluation.

Key words: reservoir assessment, heterogeneous, capillary pressure curve, transitional pressure, normalization, Qianjiang Formation reservoir

CLC Number:

TE344

Li Xinwen, Wu Hua. Classification Evaluation and Application of Heterogeneous Reservoirs Based on Improved Capillary Pressure Curve[J]. Special Oil & Gas Reservoirs, 2022, 29(2): 128-134.

References

[1] 卢欢,王清斌,杜晓峰,等.低渗透储层类型划分及储层敏感性主控因素——以渤海海域古近系为例[J].石油学报,2019,40(11):1331-1367.
LU Huan,WANG Qingbin,DU Xiaofeng,et al.Low-permeability reservoir types classification and reservoir sensitivity controlling factors:a case study of Paleogene in Bohai Sea[J].Acta Petrolei Sinica,2019,40(11):1331-1367.
[2] 肖佃师,卢双舫,姜微微,等.基于粒间孔贡献量的致密砂岩储层分类——以徐家围子断陷为例[J].石油学报,2017,38(10):29-40.
XIAO Dianshi,LU Shuangfang,JIANG Weiwei,et al.Classification of tight sandstone reservoirs based on the contribution of intergranular pores:a case study of Xujiaweizi fault depression[J].Acta Petrolei Sinica,2017,38(10):29-40.
[3] 康毅力,罗平亚.中国致密砂岩气藏勘探开发关键工程技术现状与展望[J].石油勘探与开发,2007,34(2):239-245.
KANG Yili,LUO Pingya.Current status and prospect of key techniques for exploration and production of tight sandstone gas reservoirs in China[J].Petroleum Exploration and Development,2007,34(2):239-245.
[4] 伊振林,张雷.基于微观孔隙结构的特低渗储层分类评价方法——以大庆油田古龙南地区为例[J].断块油气田,2020,27(1):40-44.
YI Zhenlin,ZHANG Lei.Classification of extra-low permeability reservoir based on microscopic pore structure:a case study of south Gulong Area in Daqing Oilfield[J].Fault-Block Oil & Gas Field,2020,27(1):40-44.
[5] 王伟明,卢双舫,陈旋,等.致密砂岩气资源分级评价新方法——以吐哈盆地下侏罗统水西沟群为例[J].石油勘探与开发,2015,42(1):60-67.
WANG Weiming,LU Shuangfang,CHEN Xuan,et al.A new method for grading and assessing the potential of tight sand gas resources:a case study of the Lower Jurassic Shuixigou Group in the Turpan-Hami Basin[J].Petroleum Exploration and Development,2015,42(1):60-67.
[6] ZHANG Pengfei,LU Shuangfang,LI Junqian,et al.Characterization of shale pore system:a case study of Paleogene Xin′gouzui Formation in the Jianghan Basin,China[J].Marine & Petroleum Geology,2017,79:321-334.
[7] 李海燕,岳大力,张秀娟.苏里格气田低渗透储层微观孔隙结构特征及其分类评价方法[J].地学前缘,2012,19(2):133-140.
LI Haiyan,YUE Dali,ZHANG Xiujuan.Characteristics of pore structure and reservoir evaluation of low permeability reservoir in Sulige Gas Field[J].Earth Science Frontiers,2012,19(2):133-140.
[8] 张安达,王成,乔睿.致密砂岩储层物性下限确定新方法及系统分类[J].岩性油气藏,2014,26(5):5-8.
ZHANG Anda,WANG Cheng,QIAO Rui.A new method for determining physical property lower limit of tight sandstone reservoir and reservoir system classification[J].Lithologic Reservoirs,2014,26(5):5-8.
[9] 林潼,魏红兴,谢亚妮.以喉道为参数的致密砂岩气储层评价方法——以库车坳陷迪北地区致密砂岩气为例[J].沉积学报,2016,34(5):983-990.
LIN Tong,WEI Hongxing,XIE Yani.Using throat parameter to assess tight sandstone gas reservoir:a case study of Dibei tight sandstone gas in the east of Kuqa Depression[J].Acta Sedimentologica Sinica,2016,34(5):983-990.
[10] 代全齐,罗群,张晨,等.基于核磁共振新参数的致密油砂岩储层孔隙结构特征——以鄂尔多斯盆地延长组7段为例[J].石油学报,2016,37(7):887-897.
DAI Quanqi,LUO Qun,ZHANG Chen,et al.Pore structure characteristics of tight-oil sandstone reservoir based on a new parameter measured by NMR experiment:a case study of seventh member in Yanchang Formation,Ordos Basin[J].Acta Petrolei Sinica,2016,37(7):887-897.
[11] 雷浩,何建华,胡振国.潜江凹陷页岩油藏渗流特征物理模拟机影响因素分析[J].特种油气藏,2019,26(3):94-98.
LEI Hao,HE Jianhua,HU Zhenguo.Physical simulation and influencing factor analysis of the flow characteristics in the shale oil reservoir of Qianjiang Depression[J].Special Oil & Gas Reservoirs,2019,26(3):94-98.
[12] LEI Hao,HE Liu,LI Ruishan,et al.Effects of boundary layer and stress sensitivity on the performance of low-velocity and one-phase flow in a shale oil reservoir[J].Journal of Petroleum Science & Engineering,2019,180:186-196.
[13] 周磊,王永诗,于雯泉,等.基于物性上、下限计算的致密砂岩储层分级评价——以苏北盆地高邮凹陷阜宁组一段致密砂岩为例[J].石油与天然气地质,2019,40(6):1308-1323.
ZHOU Lei,WANG Yongshi,YU Wenquan,et al.Classification assessment of tight sandstone reservoir based on calculation of lower and upper limits of physical properties:a case study of the tight sandstone reservoir in the 1st member of Funing Formation in Gaoyou Sag,north Jiangsu Basin[J].Oil & Gas Geology,2019,40(6):1308-1323.
[14] GAO Hui,CAO Jie,WANG Chen,et al.Comprehensive characterization of pore and throat system for tight sandstone reservoirs and associated permeability determination method using SEM,rate-controlled mercury and high pressure mercury[J].Journal of Petroleum Science & Engineering,2019,174:514-524.
[15] 王有智,毛毳,刘丽莉,等.方正断陷白垩系含砂砾岩储层孔喉特征[J].东北石油大学学报,2020,44(2):36-45.
WANG Youzhi,MAO Cui,LIU Lili,et al.Pore throat characteristics of glutenite reservoirs in cretaceous of Fangzheng Depression[J].Journal of Northeast Petroleum University,2020,44(2):36-45.
[16] 祁壮壮,丁晓琪,刘鑫,等.鄂尔多斯盆地大牛地气田马五₆亚段喀斯特储层分布规律[J].东北石油大学学报,2021,45(2):32-40.
QI Zhuangzhuang,DING Xiaoqi,LIU Xin,et al.Distribution of M5₆ Karst reservoir in Daniudi Gas Field,Ordos Basin[J].Journal of Northeast Petroleum University,2021,45(2):32-40.
[17] 张鹏飞,卢双舫,李文浩,等.江汉盆地新沟嘴组页岩油储层物性下限[J].石油与天然气地质,2016,37(1):93-100.
ZHANG Pengfei,LU Shuangfang,LI Wenhao,et al.Lower limits of porosity and permeability of shale oil reservoirs in the Xin′gouzui Formation,Jianghan Basin[J].Oil & Gas Geology,2016,37(1):93-100.