中拐凸起南斜坡八道湾组油层低阻成因及识别

doi:10.7657/XJPG20240505

新疆石油地质 ›› 2024, Vol. 45 ›› Issue (5): 541-551.doi: 10.7657/XJPG20240505

中拐凸起南斜坡八道湾组油层低阻成因及识别

李枫凌^1a(), 方鑫鑫²(), 张镇^1b, 马思洁^1c, 刘荣军^1d

1.中国石油新疆油田分公司 a.油田技术服务分公司；b.红山油田有限责任公司；c.重油开发公司；d.勘探开发研究院，新疆克拉玛依 834000
2.衢州学院建筑工程学院，浙江衢州 324000

收稿日期:2023-07-20 修回日期:2023-11-01 出版日期:2024-10-01 发布日期:2024-10-09
通讯作者: 方鑫鑫（1990-），男，湖北随州人，副教授，岩石力学及地球物理，（Tel）15510556331（Email）fx15827573109@163.com
作者简介:李枫凌（1990-），男，湖北红安人，高级工程师，测井及地质勘探，（Tel）15026120568（Email）dxlfl@petrochina.com.cn
基金资助:
国家自然科学基金青年科学基金项目(41503048)

Genesis and Identification of Low Resistivity of Oil Layers in Badaowan Formation on Southern Slope of Zhongguai Bulge, Junggar Basin

LI Fengling^1a(), FANG Xinxin²(), ZHANG Zhen^1b, MA Sijie^1c, LIU Rongjun^1d

1. PetroChina Xinjiang Oilfield Company, a.Oilfield Technology Service Company; b.Hongshan Oilfield LLC; c.Heavy Oil Development Company; d.Research Institute of Exploration and Development; Karamay, Xinjiang 834000, China
2. College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang 324000, China

Received:2023-07-20 Revised:2023-11-01 Online:2024-10-01 Published:2024-10-09

摘要/Abstract

摘要：

准噶尔盆地中拐凸起南斜坡下侏罗统八道湾组低阻油层与一般低阻油层对比，储集层具有形成时期早、埋藏深度大、岩石粒度较大、泥质含量低等特点，低阻成因具有较强特殊性。在对国内外典型低阻油层成因机理综合研究的基础上，利用该区钻井、录井、测井、试井、岩心化验分析等资料，从构造、沉积、成岩作用、储集层特征、成藏条件等多角度，开展八道湾组油藏低阻主控因素研究。该区油藏低阻的形成受宏观因素和微观因素共同控制，低构造幅度、弱水动力沉积等宏观背景下，低油水分异程度、高地层水矿化度及低凝灰岩岩屑含量，是油藏低阻的主控因素；束缚水饱和度偏低，是油藏低阻的次要控制因素。在此基础上，建立地层电阻率与油气指示系数关系图版，与该区试油和试采资料对比，符合率92.9%，为中拐凸起南斜坡八道湾组低阻油层的识别提供了依据。

关键词: 准噶尔盆地, 中拐凸起, 八道湾组, 低阻油层, 成因机理, 主控因素, 油层识别

Abstract:

Compared to other low-resistivity oil layers, the low-resistivity oil layers in the Lower Jurassic Badaowan formation on the southern slope of the Zhongguai bulge in the Junggar basin are characterized by early hydrocarbon accumulation, deep burial, large grain size, and low mud content, showing a unique low-resistivity genesis. Based on a comprehensive analysis on the genetic mechanisms of typical low-resistivity oil layers globally, together with the data of drilling, logging, well testing, and core analysis in the study area, the main controlling factors of the low-resistivity oil layers in the Badaowan formation were investigated from various perspectives including tectonics, sedimentation, diagenesis, reservoir characteristics, and hydrocarbon accumulation conditions. It is found that low resistivity of the oil layers in the study area is jointly controlled by macroscopic and microscopic factors. In a macroscopic setting with low tectonic amplitude and weak hydrodynamic sedimentation, low oil-water differentiation degree, high formation water salinity, and low tuff debris content are the main controlling factors for low resistivity, while low saturation of bound water is a secondary controlling factor. Accordingly, a chart illustrating the relationship between formation resistivity and oil/gas indicator coefficient was established, which matches the formation/production testing data in the study area by 92.9%. The study results provide a basis for identifying low-resistivity oil layers in the Badaowan formation on the southern slope of the Zhongguai bulge.

Key words: Junggar basin, Zhongguai bulge, Badaowan formation, low-resistivity oil layer, genetic mechanism, main controlling factor, oil layer identification

中图分类号:

TE133

李枫凌, 方鑫鑫, 张镇, 马思洁, 刘荣军. 中拐凸起南斜坡八道湾组油层低阻成因及识别[J]. 新疆石油地质, 2024, 45(5): 541-551.

LI Fengling, FANG Xinxin, ZHANG Zhen, MA Sijie, LIU Rongjun. Genesis and Identification of Low Resistivity of Oil Layers in Badaowan Formation on Southern Slope of Zhongguai Bulge, Junggar Basin[J]. Xinjiang Petroleum Geology, 2024, 45(5): 541-551.

图/表 10

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表2

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孔隙分类	孔隙体积/ cm³	有效孔隙度/ %	渗透率/ mD	分选系数	偏态	峰态	变异系数	中值压力/ MPa	中值半径/ μm	排驱压力/ MPa	最大孔喉半径/ μm	退汞效率/ %	孔喉体积比	平均毛细管半径/μm	均质系数
Ⅰ类	2.14	19.34	103.17	3.09	0.18	1.89	0.35	0.64	1.29	0.04	18.53	28.95	2.58	6.34	0.21
Ⅱ类	1.61	14.03	7.31	2.26	-0.20	1.85	0.21	3.57	0.32	0.35	4.66	38.95	1.67	1.25	0.17

井名	试油段/ m	岩性	含油性	对比级别	试油试采结论	电阻率/ （Ω·m）	自然伽马/ API	全烃含量/ %	气测出至组分	全烃增大倍数	油气指示系数
G17井	3 042.0—3 047.0	细砂岩	油浸	15	油层	10.8	52.5	0.032 3~23.192 0	nC₅	71.8	1 077
G171井	3 072.0—3 077.0	中—细砂岩	荧光	10	油层	6.2	57.5	0.266 3~1.360 8	nC₅	5.1	51
GHW1701井		中—细砂岩	荧光	10	油层	8.2	66.0	0.072 7~4.817 3	nC₅	66.3	663
GHW1702井		细砂岩	荧光	10	油层	9.1	57.3	0.165 7~7.168 7	nC₅	43.3	433
GHW1703井		细砂岩	荧光	10	油层	8.6	64.3	0.361 8~5.289 7	nC₅	14.6	146
G191井	3 193.0—3 204.0	细砂岩	荧光	9	油层	14.4	55.1	2.927 3~38.118 1	nC₅	13.0	117
XG1井	3 023.0—3 027.0	细砂岩	荧光	9	油水同层	10.4	57.9	0.123 2~0.841 7	nC₅	6.8	61
J213井	2 995.0—2 997.5	泥质中砂岩	荧光	8	油水同层	14.2	58.7	2.586 1~6.588 6	nC₅	2.5	20
G173井	3 093.0—3 113.5	泥质细砂岩	荧光	8	含油水层	6.5	60.1	0.555 5~4.188 2	nC₅	7.5	60
CP9井	3 124.0—3 126.0	中—细砂岩	油斑	8	水层	4.6	62.6	0.125 6~2.278 5	nC₅	18.1	145
G172井	3 081.0—3 098.0	中—细砂岩	荧光	9	水层	6.0	55.7	0.120 2~3.627 4	nC₅	30.2	272
G192井	3 168.0—3 192.0	细砂岩	油斑	10	水层	7.8	72.1	0.443 7~1.390 4	nC₅	3.1	31
G193井	3 040.0—3 050.0	细砂岩	荧光	8	水层	8.1	51.2	2.278 1~7.016 9	nC₅	3.1	25
G20井	3 381.0—3 383.5	粗砂岩	荧光	10	水层	6.4	48.4	0.132 4~0.724 5	nC₅	5.5	55

中拐凸起南斜坡八道湾组油层低阻成因及识别

Genesis and Identification of Low Resistivity of Oil Layers in Badaowan Formation on Southern Slope of Zhongguai Bulge, Junggar Basin

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