Comprehensive Classification and Evaluation of Low Permeability Reservoirs Based on the Identification of Complex Lithological Characteristics

doi:10.11885/j.issn.1674-5086.2016.01.28.02

Abstract

Abstract: The SHA1 and SHA2 reservoirs of the Q oil field have widely-developed mixed sedimentary rocks composed of terrestrial debris and lacustrine carbonates. The mixing of these sediments in varying degrees and forms has resulted in a variety of lithological combinations; as a whole, the SHA1 and SHA2 reservoirs are low-porosity/low-permeability reservoirs. In view of the complex lithology and low porosity/permeability of this oil field, the data obtained from rock cores, casting sheets, cathodoluminescence and elemental capture spectroscopy (ECS) logging were used to establish a comprehensive evaluation method for low permeability reservoirs based on the identification of complex lithological characteristics. This method uses 7 evaluative parameters including lithological characteristics, effective thickness, permeability, porosity, displacement pressure, median radius, and sorting coefficient, in which displacement pressure, median radius, and the sorting coefficient are the structural parameters of microscopic pore throats which are obtained via mercury porosimetry. An analytic hierarchy process was then used to obtain the weights of each parameter and the comprehensive evaluative parameters of the reservoir, under constraints applied by the reservoirs' geological conditions. Based on this method of evaluation, the reservoirs in this region were classified into three types; in particular, the lithology of Type I reservoirs is mainly composed of silkites and oolitic sandstones with well-developed dissolution pores, high levels of pore connectivity, and have excellent deliverability test results. Hence, this is the "sweet spot" of these low-permeability reservoirs.

Key words: reservoir, mixed sedimentary rock, pore types, pore structure, comprehensive evaluation

CLC Number:

TE122.3

NIU Tao, WANG Hui, HU Xiaoqing, ZHANG Yukun, GAO Yufei. Comprehensive Classification and Evaluation of Low Permeability Reservoirs Based on the Identification of Complex Lithological Characteristics[J]. 西南石油大学学报(自然科学版), 2017, 39(3): 47-56.

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References

[1] 裘怿楠. 油气储层评价技术[M]. 北京:石油工业出版社, 1997: 20-43.
[2] 杨正明,张英芝,郝明强,等. 低渗透油田储层综合评价方法[J]. 石油学报, 2006, 27(2): 64-67. doi: 10.-3321/j.issn:0253-2697.2006.02.013 YANG Zhengming, ZHANG Yingzhi, HAO Mingqiang, et al. Comprehensive evaluation of reservoir in low permeability oilfields[J]. Acta Petrolei Sinica, 2006, 27(2): 64-67. doi: 10.3321/j.issn:0253-2697.2006.02.013
[3] 赵良孝,陈明江. 论储层评价中的五性关系[J]. 天然气工业, 2015, 35(1): 53-60. doi: 10.3787/j.issn.1000-0976.2015.01.006 ZHAO Liangxiao, CHEN Mingjiang. A discussion on the relationships between five properties in reservoir evaluation[J]. Natural Gas Industry, 2015, 35(1): 53-60. doi: 10.-3787/j.issn.1000-0976.2015.01.006
[4] 杨秋莲,李爱琴,孙燕妮,等. 超低渗储层分类方法探讨[J]. 岩性油气藏, 2007, 19(4): 51-56. doi: 10.3969/-j.issn.1673-8926.2007.04.009 YANG Qiulian, LI Aiqin, SUN Yanni, et al. Classification method for extra-low permeability reservoirs[J]. Lithologic Reservoirs, 2007, 19(4): 51-56. doi: 10.3969/j.issn.-1673-8926.2007.04.009
[5] 张锦泉,叶红专. 论碳酸盐与陆源碎屑的混合沉积[J]. 成都地质学院学报, 1989, 16(2): 87-92. ZHANG Jinquan, YE Hongzhuan. Study on carbonate and siliciclastic mixed sediments[J]. Journal of Chengdu college of Geology, 1989, 16(2): 87-92.
[6] 郭福生. 浙江江山藕塘底组陆源碎屑与碳酸盐混合沉积特征及其构造意义[J]. 沉积学报, 2004, 22(1): 136-141. doi: 10.3969/j.issn.1000-0550.2004.01.021 GUO Fusheng. Characteristics and tectonic significance of mixing sediments of siliciclastics and carbonate of Outangdi Formation in Jiangshan, Zhejiang Province[J]. Acta Sedimentologica Sinica, 2004, 22(1): 136-141. doi: 10.-3969/j.issn.1000-0550.2004.01.021
[7] 张雄华. 混积岩的分类和成因[J]. 地质科技情报,2000, 19(4): 31-33. doi: 10.3969/j.issn.1000-7849.2000.04.-006 ZHANG Xionghua. Classification and origin of mixosedimentite[J]. Geological Science and Technology Information, 2000, 19(4): 31-33. doi: 10.3969/j.issn.1000-7849.-2000.04.006
[8] 曲延明,舒萍,纪学雁,等. 松辽盆地庆深气田火山岩储层的微观结构研究[J]. 吉林大学学报(地球科学版), 2007, 37(4): 721-725. doi: 10.3969/j.issn.1671-5888.-2007.04.013 QU Yanming, SHU Ping, JI Xueyan, et al. Micro-fabrics of reservoir volcanic rocks in the Qingshen Gas Field of the Songliao Basin[J]. Journal of Jilin University (Earth Science Edition), 2007, 37(4): 721-725. doi: 10.3969/j.-issn.1671-5888.2007.04.013
[9] 庞彦明. 酸性火山岩储层储集空间特征与评价研究——以松辽盆地北部营城组为例[D]. 杭州:浙江大学, 2006.PANG Yanming. Characteristie of pore space and evalustion on reservoir of acid volcanic rocks: a case study from Yingeheng Formation in the North of Songliao Basin[D]. Hangzhou: Zhejiang University, 2006.
[10] 张家政. 准噶尔盆地红山嘴油田石炭系火山岩油藏储层研究[D]. 长沙:中南大学, 2009. ZHANG Jiazheng. Study of carboniferous voleanic reservoirs in Hongshanzui Oilfield of Junggar Basin[D]. Changsha: Central South University, 2009.
[11] 陈庆,张立新. 准噶尔盆地西北缘石炭系火山岩岩性岩相特征与裂缝分布关系[J]. 现代地质, 2009, 23(2): 305-312. doi: 10.3969/j.issn.1000-8527.2009.02.016 CHEN Qing, ZHANG Lixin. Relationship between the characteristic of lithology-lithofacies and distribution of fractures in carboniferous reservoirs, northwest margin of Junggar Basin[J]. Geoscience, 2009, 23(2): 305-312. doi: 10.3969/j.issn.1000-8527.2009.02.016
[12] 杨兆栓,林畅松,尹宏,等. 主成分分析在塔中地区奥陶系鹰山组碳酸盐岩岩性识别中的应用[J]. 天然气地球科学,2015,26(1):54-59. doi:10.11764/j.issn.1672-1926.2015.01.0054 YANG Zhaoshuan, LIN Changsong, YIN Hong, et al. Application of principal component analysis in carbonate lithology identification of the Ordovician Yingshan Formation in Tazhong Area[J]. Natural Gas Geoscience, 2015, 26(1): 54-59. doi: 10.11764/j.issn.1672-1926.2015.01.-0054
[13] 张宪国,张涛,林承焰,等. 塔南凹陷复杂岩性低渗透储层测井岩性识别[J]. 西南石油大学学报(自然科学版), 2015, 37(1): 85-90. doi: 10.11885/j.issn.1674-5086.2013.05.08.01 ZHANG Xianguo, ZHANG Tao, LIN Chengyan, et al. Lithology recognition with well logs in complex lithologic low permeability reservoirs in Ta'nan Depression[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2015, 37(1): 85-90. doi: 10.11885/j.issn.-1674-5086.2013.05.08.01
[14] 陈孟晋,刘锐娥,孙粉锦,等. 鄂尔多斯盆地西北部上古生界碎屑岩储层的孔隙结构特征初探[J]. 沉积学报, 2002, 20(4): 639-643. doi: 10.3969/j.issn.1000-0550.2002.04.017 CHEN Mengjin, LIU Rui'e, SUN Fenjin, et al. Preliminary approach on the clastic reservoir's pore textures of Upper Paleozoic in northwest Ordos Basin[J]. Acta Sedimentological Sinica, 2002, 20(4): 639-643. doi: 10.3969/j.issn.-1000-0550.2002.04.017
[15] 毕明威,陈世悦,周兆华,等. 鄂尔多斯盆地苏里格气田苏6区块盒8段致密砂岩储层微观孔隙结构特征及其意义[J]. 天然气地球科学, 2015, 26(10): 1851-1861. doi: 10.11764/j.issn.1672-1926.2015.10.1851 BI Mingwei, CHEN Shiyue, ZHOU Zhaohua, et al. Characteristics and significance of microscopic pore structure in tight sandstone reservoir of the 8^th member of lower Shihezi Formation in the Su6 area of Sulige Gasfield[J]. Natural Gas Geoscience, 2015, 26(10): 1851-1861. doi: 10.-11764/j.issn.1672-1926.2015.10.1851
[16] 刘吉余,李艳杰,于润涛. 储层综合定量评价系统开发与应用[J]. 物探化探计算技术, 2004, 26(1): 33-36. doi: 10.3969/j.issn.1001-1749.2004.01.007 LIU Jiyu, LI Yanjie, YU Runtao. The development and application of the reservoir comprehensive and quantitative evaluation system[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2004, 26(1): 33-36. doi: 10.3969/j.issn.1001-1749.2004.01.007
[17] 吕红华,任明达,柳金诚,等. Q型主因子分析与聚类分析在柴达木盆地花土沟油田新近系砂岩储层评价中的应用[J]. 北京大学学报(自然科学版), 2006, 42(6): 740-745. doi: 10.3321/j.issn:0479-8023.2006.06.008 LÜ Honghua, REN Mingda, LIU Jincheng, et al. Application of Q-model principal factor analysis and clustering method in evaluation on sandstone reservoirs of the Neogene in Huatugou Oilfield, Qaidam Basin[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2006, 42(6): 740-745. doi: 10.3321/j.issn:0479-8023.2006.06.008
[18] 张晓东,陈景山. 蜀南气田嘉二段储层分类评价的模糊综合评判[J]. 石油天然气学报, 2007, 29(1): 59-62. doi: 10.3969/j.issn.1000-9752.2007.01.015 ZHANG Xiaodong, CHEN Jingshan. Integral fuzzy evaluation on Jia 2 reservoir classification in Jia2 Member of Shunan Gas Field[J]. Journal of Oil and Gas Technology, 2007, 29(1): 59-62. doi: 10.3969/j.issn.1000-9752.2007.-01.015
[19] 张琴,朱筱敏,钟大康,等. 储层"主因素定量"评价方法的应用——以东营凹陷下第三系碎屑岩为例[J]. 天然气工业,2006,26(10):21-23. doi:10.3321/j.issn:-1000-0976.2006.10.007 ZHANG Qin, ZHU Xiaomin, ZHONG Dakang, et al. Application of major element quantification method in reservoir assessment: Taking the Paleogene clastic reservoirs in Dongying Sag as examples[J]. Natural Gas Industry, 2006, 26(10): 21-23. doi: 10.3321/j.issn:1000-0976.-2006.10.007
[20] 马立文,窦齐丰,彭仕宓,等. 用Q型聚类分析与判别函数法进行储层评价——以冀东老爷庙油田庙28X1区块东一段为例[J]. 西北大学学报(自然科学版), 2003, 33(1): 83-86. doi: 10.3321/j.issn:1000-274X.2003.01.023 MA Liwen, DOU Qifeng, PENG Shibi, et al. Comprehensively applying Q-Model gathering and discriminant function methods to reservoir classification and evaluation: Taking Ed₁ No. of Miao 28X1 Block in Laoyemiao Oilfield in Jidong as an example[J]. Journal of Northwest University (Natural Science Edition), 2003, 33(1): 83-86. doi: 10.3321/j.issn:1000-274X.2003.01.023
[21] 孙洪志,刘吉余. 储层综合定量评价方法研究[J]. 大庆石油地质与开发, 2004, 23(6): 8-11. doi: 10.3969/j.-issn.1000-3754.2004.06.004 SUN Hongzhi, LIU Jiyu. Reserch on comprehensive and quantitative reservoir evaluation[J]. Petroleum Geology & Oilfield Development in Daqing, 2004, 23(6): 8-11. doi: 10.3969/j.issn.1000-3754.2004.06.004
[22] 徐凤根,朱兴珊,颜其彬,等. 储层定量评价中指标权重的计算途径[J]. 石油学报, 1996, 17(2): 30-35. XU Fenggen, ZHU Xingshan, YAN Qibin, et al. An approach to define weight of Indexes in the quantitative evaluation of reservoirs[J]. Acta Petrolei Sinica, 1996, 17(2): 30-35.
[23] 王建东,刘吉余,于润涛,等. 层次分析法在储层评价中的应用[J]. 大庆石油学院学报, 2003, 27(3): 12-14. doi: 10.3969/j.issn.2095-4107.2003.03.004 WANG Jiandong, LIU Jiyu, YU Runtao, et al. The application of analytic hierarchy process to reservoir evaluating[J]. Journal of Daqing Petroleum Institute, 2003, 27(3): 12-14. doi: 10.3969/j.issn.2095-4107.2003.03.004