Grading Evaluation of Jurassic Ultra-Deep Tight Sandstone Reservoirs in Yongjin-Zhengshacun Area, Junggar Basin

doi:10.7657/XJPG20250106

Abstract

Abstract:

The Jurassic ultra-deep sandstone reservoirs in the Yongjin-Zhengshacun area of the Junggar Basin are tight and heterogeneous, and the standards for evaluating these reservoirs and the favorable reservoir distribution are unclear, restricting oil and gas exploration and development. Based on well logging, coring, and testing data, and by using mineral analysis, nuclear magnetic resonance (NMR), capillary pressure experiments, and core displacement tests, a study was conducted on the pore structure of the Jurassic reservoirs. The lower limit of movable pore radius was determined, and a grading evaluation standard was established with movable fluid porosity as the key indicator. The results show that the reservoir space in the medium- to fine-grained lithic and feldspathic sandstones is composed of intergranular pores, secondary dissolution pores, and microfractures, with small pore radii ranging from 0.005 to 5.000 μm. After calibrating the experimental capillary pressure curves, the lower limit of movable pore radius was determined as 0.100 μm through the NMR T₂ spectrum at different displacement states, and then the movable fluid porosity of oil-bearing rocks was clarified. By comprehensively considering the lithoelectric characteristics, pore type and structure, and oil-bearing property, and combining the productivity characteristics of typical wells, a grading reservoir evaluation standard for the study area was established. Based on the standard the reservoirs were classified into Class Ⅰ, Class Ⅱ, and Class Ⅲ. The evaluation provides a basis for subsequent oil and gas field development and well deployment, and offers valuable insights for the exploration and development of ultra-deep tight oil reservoirs in the study area and for reservoir evaluation in neighboring areas.

Key words: Junggar Basin, Yongjin-Zhengshacun area, Jurassic, ultra-deep layer, tight sandstone reservoir, grading evaluation

CLC Number:

TE122

WANG Chunwei, YANG Jun, ZHAO Dongrui, DU Huanfu, SUN Xin, WANG Yelei, MENG Fanghua. Grading Evaluation of Jurassic Ultra-Deep Tight Sandstone Reservoirs in Yongjin-Zhengshacun Area, Junggar Basin[J]. Xinjiang Petroleum Geology, 2025, 46(1): 48-56.

Figures/Tables 6

Fig. 1.

Fig. 2.

Fig. 3.

Fig. 4.

Fig. 5.

Fig. 6.

References 27

[1]	何登发, 贾承造, 赵文智, 等. 中国超深层油气勘探领域研究进展与关键问题[J]. 石油勘探与开发, 2023, 50(6):1162-1172. doi: 10.11698/PED.20230269
	HE Dengfa, JIA Chengzao, ZHAO Wenzhi, et al. Research progress and key issues of ultra-deep oil and gas exploration in China[J]. Petroleum Exploration and Development, 2023, 50(6):1162-1172.
[2]	黄福喜, 汪少勇, 李明鹏, 等. 中国石油深层、超深层油气勘探进展与启示[J]. 天然气工业, 2024, 44(1):86-96.
	HUANG Fuxi, WANG Shaoyong, LI Mingpeng, et al. Progress and implications of deep and ultra-deep oil and gas exploration in PetroChina[J]. Natural Gas Industry, 2024, 44(1):86-96
[3]	贾爱林, 位云生, 郭智, 等. 中国致密砂岩气开发现状与前景展望[J]. 天然气工业, 2022, 42(1):83-92.
	JIA Ailin, WEI Yunsheng, GUO Zhi, et al. Development status and prospect of tight sandstone gas in China[J]. Natural Gas Industry, 2022, 42(1):83-92.
[4]	孙靖, 齐洪岩, 薛晶晶, 等. 准噶尔盆地深层—超深层致密砾岩储层特征及控制因素[J]. 天然气工业, 2023, 43(8):26-37.
	SUN Jing, QI Hongyan, XUE Jingjing, et al. Characteristics and controlling factors of deep and ultra deep tight conglomerate reservoirs in the Junggar Basin[J]. Natural Gas Industry, 2023, 43(8):26-37.
[5]	卓勤功. 深层超压低孔渗、致密砂岩储层物性新认识[J]. 天然气地球科学, 2022, 33(10):1628-1636. doi: 10.11764/j.issn.1672-1926.2022.04.017
	ZHUO Qingong. New understanding of physical properties of low porosity and permeability,overpressure and tight sandstone reservoirs in deep layer[J]. Natural Gas Geoscience, 2022, 33(10):1628-1636. doi: 10.11764/j.issn.1672-1926.2022.04.017
[6]	孟婧, 张莉莹, 李芮, 等. 致密砂岩储层微观孔隙结构特征及其分类评价[J]. 特种油气藏, 2023, 30(4):71-78. doi: 10.3969/j.issn.1006-6535.2023.04.009
	MENG Jing, ZHANG Liying, LI Rui, et al. Microscopic pore structure characteristics of tight sandstone reservoirs and its classification evaluation[J]. Special Oil & Gas Reservoirs, 2023, 30(4):71-78.
[7]	赵军, 吴博深, 武延亮, 等. 深层致密砂岩气藏有效储层的分类评价方法[J]. 西南石油大学学报(自然科学版), 2022, 44(2):31-39. doi: 10.11885/j.issn.1674-5086.2020.01.07.01
	ZHAO Jun, WU Boshen, WU Yanliang, et al. Classification and evaluation of effective reservoirs in deep tight sandstone gas reservoirsin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(2):31-39.
[8]	徐小童, 张立宽, 冶明泽, 等. 深层砂岩储层成岩作用差异性及与储层质量的关系:以准噶尔盆地中部征沙村地区侏罗系为例[J]. 天然气地球科学, 2021, 32(7):1022-1036. doi: 10.11764/j.issn.1672-1926.2021.02.011
	XU Xiaotong, ZHANG Likuan, YE Mingze, et al. Different diagenesis of deep sandstone reservoir and its relationship with reservoir property:Case study of Jurassic in Zhengshacun area,central Junggar Basin[J]. Natural Gas Geoscience, 2021, 32(7):1022-1036. doi: 10.11764/j.issn.1672-1926.2021.02.011
[9]	向敏, 刘星, 李政胤. 鄂尔多斯盆地七里村油田长7段致密储层孔隙结构特征及流体可动性[J]. 非常规油气, 2024, 11(2):29-36.
	XIANG Min, LIU Xing, LI Zhengyin. Pore structure characteristics and fluid mobility of tight reservoir in Chang7 member of Qilicun oilfield in Ordos Basin[J]. Unconventional Oil & Gas, 2024, 11(2):29-36.
[10]	李朋威, 胡宗全, 刘忠群, 等. 川西新场地区须二段深层致密砂岩储层类型与差异控储作用[J]. 天然气地球科学, 2024, 35(7):1136-1149. doi: 10.11764/j.issn.1672-1926.2023.12.011
	LI Pengwei, HU Zongquan, LIU Zhongqun, et al. Types of the deep tight sandstone reservoirs and their different controlling in the second member of Xujiahe formation in Xinchang area,western Sichuan Basin[J]. Natural Gas Geoscience, 2024, 35(7):1136-1149. doi: 10.11764/j.issn.1672-1926.2023.12.011
[11]	赖锦, 肖露, 赵鑫, 等. 深层—超深层优质碎屑岩储层成因与测井评价方法:以库车坳陷白垩系巴什基奇克组为例[J]. 石油学报, 2023, 44(4):612-625. doi: 10.7623/syxb202304004
	LAI Jin, XIAO Lu, ZHAO Xin, et al. Genesis and logging evaluation of deep to ultra-deep high-quality clastic reservoirs:A case study of the Cretaceous Bashijiqike formation in Kuqa depression[J]. Acta Petrolei Sinica, 2023, 44(4):612-625.
[12]	刘惠民, 张关龙, 范婕, 等. 准噶尔盆地腹部征沙村地区征10井的勘探发现与启示[J]. 石油与天然气地质, 2023, 44(5):1118-1128.
	LIU Huimin, ZHANG Guanlong, FAN Jie, et al. Exploration discoveries and implications of Well Zheng 10 in the Zhengshacun area of the Junggar Basin[J]. Oil & Gas Geology, 2023, 44(5):1118-1128.
[13]	刘浩杰, 张昌民, 盖姗姗, 等. 准噶尔盆地永进油田侏罗系超深层致密砂岩储层成岩相识别及分布预测[J]. 油气地质与采收率, 2024, 31(1):13-22.
	LIU Haojie, ZHANG Changmin, GAI Shanshan, et al. Diagenetic facies identification and distribution prediction of Jurassic ultra-deep tight sandstone reservoirs in Yongjin oilfield,Junggar Basin[J]. Petroleum Geology and Recovery Efficiency, 2024, 31(1):13-22.
[14]	黄成, 朱筱敏, 金绪铃, 等. 准噶尔盆地永进地区齐古组深埋砂岩成岩作用对储集层质量影响的定量表征[J]. 古地理学报, 2024, 26(3):683-699.
	HUANG Cheng, ZHU Xiaomin, JIN Xuling, et al. Quantitative characterization of influence of diagenesis on reservoir quality of deep-buried sandstone of Qigu formation in Yongjin area,Junggar Basin[J]. Journal of Palaeogeography, 2024, 26(3):683-699.
[15]	盖姗姗, 王子振, 刘浩杰, 等. 永进油田致密储集层岩石力学参数剖面构建及应用[J]. 新疆石油地质, 2024, 45(3):362-370.
	GAI Shanshan, WANG Zizhen, LIU Haojie, et al. Establishment and application of rock mechanical parameter profile to tight reservoirs in Yongjin oilfield[J]. Xinjiang Petroleum Geology, 2024, 45(3):362-370.
[16]	侯海海, 李强强, 梁国栋, 等. 准噶尔盆地南缘西山窑组与八道湾组煤层气成藏富集条件对比研究[J]. 非常规油气, 2022, 9(1):18-24.
	HOU Haihai, LI Qiangqiang, LIANG Guodong, et al. Comparative study of CBM accumulation conditions between the Xishanyao formation and the Badaowan formation in the southern Junggar Basin[J]. Unconventional Oil & Gas, 2022, 9(1):18-24.
[17]	任新成. 准噶尔盆地永进油田西山窑组油藏成岩演化及成藏史[J]. 新疆石油地质, 2021, 42(1):21-28.
	REN Xincheng. Diagenetic evolution and hydrocarbon accumulation history in reservoirs of Xishanyao formation in Yongjin oilfield,Junggar Basin[J]. Xinjiang Petroleum Geology, 2021, 42(1):21-28.
[18]	毛锐, 白雨, 王盼, 等. 玛西斜坡区风城组高含盐致密储集层流体识别[J]. 新疆石油地质, 2024, 45(3):279-285.
	MAO Rui, BAI Yu, WANG Pan, et al. Identification of fluid in highly saline tight reservoirs of Fengcheng formation in Maxi slope area[J]. Xinjiang Petroleum Geology, 2024, 45(3):279-285.
[19]	黄奕铭, Richard COLLIER. 致密砂岩储集层微观孔喉结构及其分形特征:以西加拿大盆地A区块Upper Montney段为例[J]. 新疆石油地质, 2021, 42(4):506-513.
	HUANG Yiming, COLLIER R. Pore throat structure and fractal characteristics of tight sandstone reservoirs:A case study of Upper Montney formation in Block A in western Canada sedimentary basin[J]. Xinjiang Petroleum Geology, 2021, 42(4):506-513.
[20]	江文滨, 林缅, 姬莉莉, 等. 致密储层中石油充注特征的在线显微成像研究[J]. 石油实验地质, 2023, 45(2):366-377.
	JIANG Wenbin, LIN Mian, JI Lili, et al. On-line microscopic imaging investigation on oil charging characteristics in tight reservoirs[J]. Petroleum Geology & Experiment, 2023, 45(2):366-377.
[21]	李奎周, 王团, 赵海波, 等. 基于深度前馈神经网络的致密砂岩储层孔隙度预测[J]. 大庆石油地质与开发, 2023, 42(5):140-146.
	LI Kuizhou, WANG Tuan, ZHAO Haibo, et al. Porosity prediction of tight sandstone reservoir based on deep feedforward neural network[J]. Petroleum Geology & Oilfield Development in Daqing, 2023, 42(5):140-146.
[22]	董鑫旭, 孟祥振, 蒲仁海. 基于致密砂岩储层孔喉系统分形理论划分的可动流体赋存特征认识[J]. 天然气工业, 2023, 43(3):78-90.
	DONG Xinxu, MENG Xiangzhen, PU Renhai. Occurrence characteristics of movable fluids based on the division of pore throat system in tight gas reservoir by fractal theory[J]. Natural Gas Industry, 2023, 43(3):78-90.
[23]	吴云飞, 刘成林, 冯小龙, 等. 致密砂岩储层微观结构特征及分类评价:以鄂尔多斯盆地南梁油田长9储层为例[J]. 断块油气田, 2023, 30(2):246-253.
	WU Yunfei, LIU Chenglin, FENG Xiaolong, et al. Microstructural characteristics and classification evaluation of tight sandstone reservoirs:A case study of the Chang 9 reservoir in the Nanliang oilfield of the Ordos Basin[J]. Fault-Block Oil & Gas Field, 2023, 30(2):246-253.
[24]	刘成, 王栋, 柳雪青, 等. 基于核磁共振技术的大庆油田X6东区剩余油分布特征研究[J]. 非常规油气, 2022, 9(3):96-102.
	LIU Cheng, WANG Dong, LIU Xueqing, et al. Study on distribution characteristics of residual oil in eastern X6 block of Daqing oilfield based on nuclear magnetic resonance[J]. Unconventional Oil & Gas, 2022, 9(3):96-102.
[25]	朱海燕, 龚丁, 张兵. 致密砂岩气储层多尺度“地质—工程”双甜点评价新方法[J]. 天然气工业, 2023, 43(6):76-86.
	ZHU Haiyan, GONG Ding, ZHANG Bing. A multi-scale geology-engineering sweet spot evaluation method for tight sandstone gas reservoirs[J]. Natural Gas Industry, 2023, 43(6):76-86.
[26]	王大为, 李金宜, 刘东, 等. 基于储层物性参数的毛管压力曲线和孔喉分布表征[J]. 非常规油气, 2024, 11(4):1-9.
	WANG Dawei, LI Jinyi, LIU Dong, et al. Characterization of capillary pressure curve and pore throat distribution based on reservoir physical parameters[J]. Unconventional Oil & Gas, 2024, 11(4):1-9.
[27]	梅舜豪, 苏煜彬, 袁凯, 等. 致密油藏渗吸作用影响因素实验:以新疆油田X区块为例[J]. 大庆石油地质与开发, 2023, 42(1):169-174.
	MEI Shunhao, SU Yubin, YUAN Kai, et al. Experiment of influencing factors of imbibition in tight oil reservoir:Taking Block X in Xinjiang oilfield as an example[J]. Petroleum Geology & Oilfield Development in Daqing, 2023, 42(1):169-174.