准噶尔盆地中拐凸起佳木河组储集层物性实测值校正

doi:10.7657/XJPG20210615

摘要/Abstract

摘要：

准噶尔盆地西北缘中拐凸起佳木河组致密砂岩储集层岩心实测渗透率主要分布在0.100~1 000.000 mD,与测井渗透率相差4~6个数量级,实测渗透率明显失真,影响了储集层评价的准确性。从研究区地质背景出发,综合测井和岩心资料,通过对该区10口井644块样品薄片进行分析,结合压汞法、铸体薄片、X射线衍射、图像分析统计等,分析了储集层物性实测值失真主因。研究结果表明：取至地表的岩心中,胶结物浊沸石减压膨胀形成的假粒缘缝,是引起测试岩心渗透率异常偏高的主因;浊沸石含量与假缝面孔率、地层电阻率与中子孔隙度比值呈正相关;当浊沸石含量小于5%,假缝面孔率在1%以下,孔隙度与渗透率呈良好相关关系,但随着浊沸石含量增加,渗透率明显变大（多数在1.000 mD以上）,与区内储集层类型和测井结果不符。通过分析岩石薄片和测井资料,确定假缝面孔率与浊沸石含量和假缝孔隙度的关系,并参照测井孔隙度,剔除假缝孔隙度,得到校正后的真孔隙度和对应的渗透率。校正后的储集层渗透率主要分布在0.001~5.000 mD,与测井渗透率接近,证实校正方法可靠。

关键词: 准噶尔盆地, 中拐凸起, 佳木河组, 储集层, 浊沸石, 胶结物, 假粒缘缝, 物性校正

Abstract:

The measured permeability of the cores from the tight sandstone reservoir in the Jiamuhe formation of the Zhongguai uplift in the northwestern margin of the Junggar basin ranges from 0.1 mD to 1000 mD, which is 4-6 orders of magnitude different from the permeability calculated from logging. The measured permeability is obviously distorted, which affects the accuracy of reservoir evaluation. Based on the geological background of the study area and combined with well logging and core data, 644 thin sections from 10 wells in the area are analyzed and the main causes of reservoir physical property distortion are studied based on mercury injection method, cast thin section, X-ray diffraction, image analysis and statistics and other methods. The results show that the pseudo granular marginal fractures formed by the decompressed expansion of the cement laumontite are the main reason for the abnormally high permeability measured from the cores taken to surface; the content of laumontite positively correlates to the surface porosity of pseudo fracture, and to the ratio of formation resistivity to neutron porosity. When the laumontite content is less than 5%, and the surface porosity of pseudo granular marginal fractures is less than 1%, the porosity has a good correlation with permeability. However, with the increase of the laumontite content, the permeability increases obviously (mostly more than 1 mD), which is inconsistent with the reservoir type and well logging results in the area. Based on the analysis of rock thin section and well logging data, the correlations between surface porosity of the pseudo fractures and laumontite content and pseudo fracture porosity are determined. By referring to the well logging porosity and eliminating the pseudo fracture porosity, the corrected true porosity and corresponding permeability values are obtained. The corrected reservoir permeability values mainly range from 0.001 mD to 5.000 mD, which is close to the permeability from well logging interpretation, proving that this correction method is reliable.

Key words: Junggar basin, Zhongguai uplift, Jiamuhe formation, reservoir, laumontite, cement, pseudo granular marginal fracture, physical property correction

中图分类号:

TE121.3

杨川, 吴涛, 李啸, 曾德龙, 仇鹏, 冯鑫, 戴灿鑫. 准噶尔盆地中拐凸起佳木河组储集层物性实测值校正[J]. 新疆石油地质, 2021, 42(6): 749-755.

YANG Chuan, WU Tao, LI Xiao, ZENG Delong, QIU Peng, FENG Xin, DAI Canxin. Correction of Measured Reservoir Physical Properties of Jiamuhe Formation in Zhongguai Uplift of Junggar Basin[J]. Xinjiang Petroleum Geology, 2021, 42(6): 749-755.

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参考文献 17

[1]	支东明, 宋永, 何文军, 等. 准噶尔盆地中—下二叠统页岩油地质特征、资源潜力及勘探方向[J]. 新疆石油地质, 2019, 40(4):389-401.
	ZHI Dongming, SONG Yong, HE Wenjun, et al. Geological characteristics,resource potential and exploration direction of shale oil in Middle-Lower Permian,Junggar basin[J]. Xinjiang Petroleum Geology, 2019, 40(4):389-401.
[2]	郭沫贞, 徐洋, 寿建峰, 等. 准噶尔盆地西北缘二叠系碎屑岩次生孔隙发育控制因素[J]. 沉积学报, 2017, 35(2):330-342.
	GUO Mozhen, XU Yang, SHOU Jianfeng, et al. Controlling factors of secondary pore development and petroleum exploration significance of Permian clastic rocks in northwest margin of Junggar basin[J]. Acta Sedimentologica Sinica, 2017, 35(2):330-342.
[3]	王屿涛, 吕纯刚, 姚爱国, 等. 准噶尔盆地致密砂岩气资源潜力及勘探前景[J]. 天然气地球科学, 2015, 26(5):855-860.
	WANG Yutao, LÜ Chungang, YAO Aiguo, et al. Tight sandstone gas resource potential and exploration prospect in the Junggar basin[J]. Natural Gas Geoscience, 2015, 26(5):855-860.
[4]	李振华, 邱隆伟, 师政, 等. 准噶尔盆地中拐地区佳二段沸石类矿物成岩作用及其对油气成藏的意义[J]. 中国石油大学学报(自然科学版), 2014, 38(1):1-7.
	LI Zhenhua, QIU Longwei, SHI Zheng, et al. Diagenesis of zeolite minerals and its significance for hydrocarbon accumulation in the second member of Jiamuhe formation of Zhongguai area,Junggar basin[J]. Journal of China University of Petroleum (Edition of Natural Science), 2014, 38(1):1-7.
[5]	王孝明, 操应长, 远光辉, 等. 中拐地区二叠系致密砂岩成岩作用及其控制因素[J]. 海洋地质前沿, 2015, 31(9):46-54.
	WANG Xiaoming, CAO Yingchang, YUAN Guanghui, et al. Diagenetic characteristics and controlling factors of the Permian tight sandstone reservoirs in Zhongguai area[J]. Marine Geology Frontier, 2015, 31(9):46-54.
[6]	吴和源, 唐勇, 常秋生. 准噶尔盆地中拐凸起佳木河组沸石类胶结砂砾岩储集层成因机理[J]. 新疆石油地质, 2017, 38(3):281-288.
	WU Heyuan, TANG Yong, CHANG Qiusheng. Genesis of sandy conglomerate reservoirs cemented by zeolites in Jiamuhe formation of Zhongguai swell,Junggar basin[J]. Xinjiang Petroleum Geology, 2017, 38(3):281-288.
[7]	何文军, 杨海波, 费李莹, 等. 准噶尔盆地新光地区佳木河组致密砂岩气有利区资源潜力综合分析[J]. 天然气地球科学, 2018, 29(3):370-381.
	HE Wenjun, YANG Haibo, FEI Liying, et al. Comprehensive analysis of tight sandstone gas resource potential in the favorable area of Jiamuhe formation in Xinguang area,Junggar basin[J]. Natural Gas Geoscience, 2018, 29(3):370-381.
[8]	朱世发, 朱筱敏, 王绪龙, 等. 准噶尔盆地西北缘二叠系沸石矿物成岩作用及对油气的意义[J]. 中国科学:地球科学, 2011, 41(11):1 602-1 612.
	ZHU Shifa, ZHU Xiaomin, WANG Xulong, et al. Zeolite diagenesis and its control on petroleum reservoir quality of Permian in northwestern margin of Junggar basin[J]. Science China:Earth Sciences, 2011, 41(11):1 602-1 612.
[9]	张顺存, 姚卫江, 邢成智, 等. 准噶尔盆地西北缘中拐凸起—五、八区火山岩岩相特征[J]. 新疆石油地质, 2011, 32(1):7-10.
	ZHANG Shuncun, YAO Weijiang, XING Chengzhi, et al. Lithofacies of volcanic rocks from Zhongguai swell to District-5 and District-8 in northwestern margin of Junggar basin[J]. Xinjiang Petroleum Geology, 2011, 32(1):7-10.
[10]	孔玉华, 鲍海娟, 李振华, 等. 准噶尔盆地中拐凸起佳木河组层序地层模式[J]. 特种油气藏, 2014, 21(5):60-64.
	KONG Yuhua, BAO Haijuan, LI Zhenhua, et al. Sequence,stratigraphic mode of Jiamuhe formation in Zhongguai bulge,Junggar basin[J]. Special Oil & Gas Reservoirs, 2014, 21(5):60-64.
[11]	王圣柱. 博格达山山前带芦草沟组不同岩相储集特征及含油性[J]. 新疆石油地质, 2020, 41(4):402-413.
	WANG Shengzhu. Reservoir characteristics and oil-bearing properties of different lithofacies of Lucaogou formation in the piedmont belt of Bogda mountain[J]. Xinjiang Petroleum Geology, 2020, 41(4):402-413.
[12]	孟祥超, 徐洋, 韩守华, 等. 中拐地区上乌尔禾组浊沸石展布规律及优质储层预测[J]. 东北石油大学学报, 2013, 37(1):16-23.
	MENG Xiangchao, XU Yang, HAN Shouhua, et al. Distribution rute of laumontite and favorable reservoir forecast of P₃w in Zhongguai region[J]. Journal of Northeast Petroleum University, 2013, 37(1):16-23.
[13]	李振华. 准噶尔盆地中拐地区佳木河组沉积特征与成岩环境研究[D]. 山东青岛:中国石油大学(华东), 2013:95-100.
	LI Zhenhua. The research of sedimentary characteristics and diagenetic environment in Permian Jiamuhe formation of Zhongguai area in the Junggar basin[D]. Qingdao,Shandong: China University of Petroleum(East China), 2013:95-100.
[14]	黄思静, 郎咸国, 兰叶芳, 等. 储层孔隙度-渗透率关系曲线中的截止孔隙度与储层质量[J]. 成都理工大学学报(自然科学版), 2011, 38(6):593-602.
	HUANG Sijing, LANG Xianguo, LAN Yefang, et al. Porosity cutoff of porosity-permeability curve and the reservoir quality[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2011, 38(6):593-602.
[15]	黄思静, 张萌, 朱世全, 等. 砂岩孔隙成因对孔隙度/渗透率关系的控制作用:以鄂尔多斯盆地陇东地区三叠系延长组为例[J]. 成都理工大学学报(自然科学版), 2004, 31(6):648-653.
	HUANG Sijing, ZHANG Meng, ZHU Shiquan, et al. Control of origin of pores over relationship of porosity to permeability in sandstone reservoir:a case study from Yanchang sandstone of Triassic of eastern Gansu,Ordos basin[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2004, 31(6):648-653.
[16]	徐振章. 试论影响岩石热物理性质的因素及机制[J]. 石油勘探与开发, 1992, 19(6):85-89.
	XU Zhenzhang. A disussion of factors influencing thermophysical characteristics of rocks and their mechanisms[J]. Petroleum Exploration and Development, 1992, 19(6):85-89.
[17]	蔡毅. 中拐凸起南斜坡二叠系佳木河组砂砾岩储层特征分析[D]. 北京:中国石油大学(北京), 2016.
	CAI Yi. The research on sandy conglomerate reservoir characteristics of Permian Jiamuhe formation of the southern slope of Zhongguai uplift[D]. Beijing:China University of Petroleum(Beijing), 2016.