PETROLOGICAL CHARACTERISTICS AND OIL-GAS EXPLORATION INDICATION OF THE RESERVOIRS ON NORTHERN SHAANXI SLOPE IN ORDOS BASIN: A Case Study of Chang 6 Oil Reservoir in Northern Youfangzhuang Area
-
摘要:
为明确鄂尔多斯盆地油房庄北部有利相带和优质储层发育区，推进鄂尔多斯盆地探明储量的进一步扩大，通过岩心薄片观察、岩石矿物成分分析测定等多种手段开展油房庄北部重点层段长6油层组储层的碎屑颗粒组成、填隙物组分等关键特征要素研究，并在此基础上分析长6油层组储层的重、轻矿物分布规律，进而探讨物源的指示意义以及油气耦合关系，以期补充该地区关于储层岩石学和物源分析的科研成果. 经分析，长6砂岩储层主要为长石砂岩，并见少量岩屑长石砂岩; 填隙物的类型多、含量变化大，主要包括黏土胶结物、碳酸盐类胶结物、硅质胶结物等; 粒级分布以细砂为主，颗粒磨圆为次棱角状，颗粒分选中等以上占主体; 胶结类型以薄膜-孔隙型和孔隙-薄膜型、孔隙型、薄膜型、加大-孔隙型胶结为主. 长6砂岩储层标准偏差对粒度平均值图解和重矿物组合、轻矿物组分都揭示了长6油层组时期研究区主要受东北方向物源影响，发育了多期叠置的三角洲前缘水下分流河道砂体，并且由于长距离搬运效应，残余粒间孔、长石溶孔较为发育，长石、绿泥石和高岭石的矿物组合在一定程度上提升了研究区的储层物性，并增加了低阻油藏的渗透性. 长61和长62的水下分流河道砂体为研究区的优质储层发育区.
Abstract:To identify favorable facies belt and high quality reservoir development area in northern Youfangzhuang area and expand the proved reserves in Ordos Basin, the paper studies the clastic particle composition and interstitial component of Chang 6 oil formation reservoir through various experimental means such as core thin section observation and mineral composition analysis with detailed experimental data. On this basis, the distribution rule of heavy and light minerals in Chang 6 reservoir is analyzed, and the indication significance of provenance and oil-gas coupling relation are discussed to supplement the scientific research results of reservoir petrology and provenance analysis in the area. The results show that Chang 6 sandstone reservoir is mainly feldspar sandstone, with minor lithic arkose. The interstitial materials are various in types and contents, including clay cement, carbonate cement and siliceous cement. The grains are mainly fine sand, sub-angular and above middle-level sorted. The cementation types are mainly film-pore, pore-film, pore, film and overgrowth-pore cementation. The standard deviation vs. average grain size diagram, heavy mineral association and light mineral composition of Chang 6 sandstone reservoir all indicate that the Chang 6 oil formation is mainly affected by the provenance from northeast, therefore the multi-stage superimposed delta front underwater distributary channel sand bodies are developed. Besides, the residual intergranular pores and feldspar dissolution pores are developed due to long distance transport. The mineral assemblage of feldspar, chlorite and kaolinite improves the physical properties of reservoir in the study area and increases the permeability of low resistivity reservoir. The underwater distributary channel reservoirs in Chang 61 and 62 oil formations are high quality reservoir development areas.
-
-
表 1 油房庄北部地区长6砂岩成分含量表
Table 1. Composition contents of sandstone in Chang 6 reservoir of northern Youfangzhuang area
层位 石英类 长石类 岩屑类 云母 填隙物 样品个数 合计 火成岩屑 变质岩屑 沉积岩屑 合计 杂基 胶结物 长61 24.4 44.0 9.7 2.3 6.9 0.5 5.6 16.3 0.9 15.4 113 长62 25.1 42.7 9.1 2.1 6.7 0.3 7.9 15.5 1.4 14.1 51 长63 27.1 42.6 8.8 2.7 5.9 0.1 7.3 14.2 1.4 12.8 21 含量单位：%. 
下载: 导出CSV
表 2 油房庄北部地区长6储层粒度参数统计表
Table 2. Parameters of grain size of Chang 6 reservoir in northern Youfangzhuang area
层位 粒级（φ） 矩法 图解法 粗砂（0~1） 中砂（1~2） 细砂（2~4） 粉砂（4~5） 泥（>5） 平均值 标准偏差 偏度 峰度 平均值 标准偏差 偏度 峰度 C值/mm M值/mm 分选系数 长61 0 1.7% 86.4% 10.8% 1.2% 3.13 0.61 1.52 8.82 3.10 0.53 0.18 1.06 0.24 0.12 1.62 长62 0 2.2% 85.9% 8.8% 3.1% 3.12 0.60 1.71 11.36 3.09 0.54 0.19 1.02 0.24 0.13 1.80 长63 0 6.2% 83.4% 9.3% 1.1% 3.01 0.58 1.00 5.51 2.98 0.55 0.18 1.11 0.27 0.14 1.62
下载: 导出CSV
-
[1] 刘玲, 张创, 孙明. 志丹油田纸坊北油区三叠系延长组长6-长9储层致密史与油藏成藏史研究[J]. 地质与资源, 2023, 32(3): 327-334. doi: 10.13686/j.cnki.dzyzy.2023.03.009
Liu L, Zhang C, Sun M. Compacting and accumulation history of Chang 6-Chang 9 reservoirs from the Triassic Yanchang Formation in Zhidan Oilfield[J]. Geology and Resources, 2023, 32(3): 327-334. doi: 10.13686/j.cnki.dzyzy.2023.03.009
[2] 张琼, 徐文礼, 徐姁, 等. 渤海湾盆地富林洼陷古近系沙三段储层特征及油气主控因素[J]. 中国地质, 2023, 50(2): 543-556. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI202302016.htm
Zhang Q, Xu W L, Xu X, et al. Reservoir characteristics and main controlling factors of the third member of Paleogene Shahejie Formation in Fulin sag, Bohai Bay Basin[J]. Geology in China, 2023, 50(2): 543-556. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI202302016.htm
[3] 王雪茹. 油房庄南区长4+5储层综合评价[D]. 西安: 西安石油大学, 2015.
Wang X R. The comprehensive evaluation of Youfangzhuang south Chang 4+5 reservoir[D]. Xi'an: Xi'an Shiyou University, 2015.
[4] 王勇. 油房庄、新安边区块长7储层分析[J]. 化工管理, 2014(29): 31. https://www.cnki.com.cn/Article/CJFDTOTAL-FGGL201429025.htm
Wang Y. Analysis of Chang 7 reservoir in Youfangzhuang and Xin'anbian area[J]. Chemical Enterprise Management, 2014(29): 31. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-FGGL201429025.htm
[5] 贾春明, 潘拓, 余海涛, 等. 准噶尔盆地沙湾凹陷风城组储层特征及物性控制因素分析[J]. 西北地质, 2023, 56(4): 49-61. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDI202304002.htm
Jia C M, Pan T, Yu H T, et al. Controlling factors on physical property and reservoir characters of Fengcheng Formation in Shawan depression, Junggar Basin[J]. Northwestern Geology, 2023, 56(4): 49-61. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDI202304002.htm
[6] 于涛, 于江涛, 孟宁宁, 等. 鄂尔多斯盆地油房庄延长组长7油层组沉积环境的粒度特征研究[J]. 中国科技论文, 2017, 12(3): 255-262. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKZX201703003.htm
Yu T, Yu J T, Meng N N, et al. Grain size distributions of sedimentary environment of Chang 7 reservoir of Yanchang Formation, Youfangzhuang area, Ordos Basin[J]. China Sciencepaper, 2017, 12(3): 255-262. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKZX201703003.htm
[7] 喻建, 张严, 赵会涛, 等. 鄂尔多斯盆地志靖-安塞地区延长组长10储层特征及评价[J]. 地质与资源, 2019, 28(4): 364-371. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract8361.shtml
Yu J, Zhang Y, Zhao H T, et al. Characteristics and evaluation of C-10 reservoir in Zhijing-Ansai area, Ordos Basin[J]. Geology and Resources, 2019, 28(4): 364-371. http://manu25.magtech.com.cn/Jweb_dzyzy/CN/abstract/abstract8361.shtml
[8] 张岚, 王少鹏, 吴穹螈, 等. 古潜山Z油田下古生界碳酸盐岩主控因素及储层发育模式[J]. 地质与资源, 2023, 32(1): 49-56. doi: 10.13686/j.cnki.dzyzy.2023.01.006
Zhang L, Wang S P, Wu Q Y, et al. Main controlling factors and reservoir development model of Lower Paleozoic carbonate rocks in buried hill Z Oilfield[J]. Geology and Resources, 2023, 32(1): 49-56. doi: 10.13686/j.cnki.dzyzy.2023.01.006
[9] 卢广利, 刘冠华, 姚元建, 等. 鄂尔多斯盆地油房庄地区长8储层孔隙结构研究[J]. 辽宁化工, 2012, 41(5): 515-517. https://www.cnki.com.cn/Article/CJFDTOTAL-LNHG201205040.htm
Lu G L, Liu G H, Yao Y J, et al. Research on pore structure of Chang 8 reservoir in Youfangzhuang area, Ordos Basin[J]. Liaoning Chemical Industry, 2012, 41(5): 515-517. https://www.cnki.com.cn/Article/CJFDTOTAL-LNHG201205040.htm
[10] 李岩. 鄂尔多斯盆地油房庄地区延长组长4+5油藏沉积微相研究[D]. 青岛: 中国海洋大学, 2014.
Li Y. Sedimentary microfacies research of Chang4+5 reservoir of Yanchang Formation in Youfangzhuang area, Ordos Basin[D]. Qingdao: Ocean University of China, 2014.
[11] 刘佳庆, 康锐, 杨传奇, 等. 鄂尔多斯盆地油房庄南部长4+5低阻油层成因分析与识别方法[J]. 非常规油气, 2017, 4(2): 32-39. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201702007.htm
Liu J Q, Kang R, Yang C Q, et al. Origin analysis and recognition methods of Chang 4+5 low-resistivity reservoir in the south of Youfangzhuang, Ordos Basin[J]. Unconventional Oil & Gas, 2017, 4(2): 32-39. https://www.cnki.com.cn/Article/CJFDTOTAL-FCYQ201702007.htm
[12] 付振柯, 王晓龙, 饶松, 等. 川西坳陷须三段致密砂岩优质储层特征及控制因素[J]. 中国地质, 2022, 49(1): 298-310. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI202201019.htm
Fu Z K, Wang X L, Rao S, et al. The characteristics and main controlling factors of high quality tight sandstone reservoir in the 3th member of Xujiahe Formation in West Sichuan Depression[J]. Geology in China, 2022, 49(1): 298-310. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI202201019.htm
[13] 朱国华. 碎屑岩储集层孔隙的形成、演化和预测[J]. 沉积学报, 1992, 10(3): 114-123. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB199203013.htm
Zhu G H. Origin and evolution and prediction of porosity in clastic reservoir rocks[J]. Acta Sedimentologica Sinica, 1992, 10(3): 114-123. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB199203013.htm
[14] 蔺宏斌, 侯明才, 陈洪德, 等. 鄂尔多斯盆地上三叠统延长组沉积体系特征及演化[J]. 成都理工大学学报(自然科学版), 2008, 35(6): 674-680. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG200806012.htm
Lin H B, Hou M C, Chen H D, et al. Characteristics and evolution of the sedimentary system of Upper Triassic Yanchang Formation in Ordos Basin, China[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2008, 35(6): 674-680. https://www.cnki.com.cn/Article/CJFDTOTAL-CDLG200806012.htm
[15] 和钟铧, 刘招君, 张峰. 重矿物在盆地分析中的应用研究进展[J]. 地质科技情报, 2001, 20(4): 29-32. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ200104007.htm
He Z H, Liu Z J, Zhang F. Latest progress of heavy mineral research in the basin analysis[J]. Geological Science and Technology Information, 2001, 20(4): 29-32. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ200104007.htm
[16] 李凤杰, 王多云, 王峰, 等. 坳陷湖盆三角洲前缘储层砂体成因研究[J]. 石油实验地质, 2007, 29(1): 63-68, 94. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD200701011.htm
Li F J, Wang D Y, Wang F, et al. Genetic research of reservoirs at delta front in depressed lacustrine basins[J]. Petroleum Geology and Experiment, 2007, 29(1): 63-68, 94. https://www.cnki.com.cn/Article/CJFDTOTAL-SYSD200701011.htm
[17] 赵红格, 刘池洋. 物源分析方法及研究进展[J]. 沉积学报, 2003, 21(3): 409-415. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB200303006.htm
Zhao H G, Liu C Y. Approaches and prospects of provenance analysis[J]. Acta Sedimentologica Sinica, 2003, 21(3): 409-415. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB200303006.htm
[18] 蔺宏斌, 姚泾利. 鄂尔多斯盆地南部延长组沉积特性与物源探讨[J]. 西安石油学院学报(自然科学版), 2000, 15(5): 7-9. https://www.cnki.com.cn/Article/CJFDTOTAL-XASY200005002.htm
Lin H B, Yao J L. Depositional feature and material source analysis of Yanchang Group in Eerduosi Basin[J]. Journal of Xi'an Petroleum Institute (Natural Science Edition), 2000, 15(5): 7-9. https://www.cnki.com.cn/Article/CJFDTOTAL-XASY200005002.htm
[19] 宋凯, 吕剑文, 杜金良, 等. 鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J]. 古地理学报, 2002, 4(3): 59-66. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX200203007.htm
Song K, Lü J W, Du J L, et al. Source direction analysis and delta depositional systems of Yanchang Formation of the Upper Triassic in the central Ordos Basin[J]. Journal of Palaeogeography, 2002, 4(3): 59-66. https://www.cnki.com.cn/Article/CJFDTOTAL-GDLX200203007.htm
[20] 魏斌, 魏红红, 陈全红, 等. 鄂尔多斯盆地上三叠统延长组物源分析[J]. 西北大学学报(自然科学版), 2003, 33(4): 447-450. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ200304020.htm
Wei B, Wei H H, Chen Q H, et al. Sediment provenance analysis of Yanchang Formation in Ordos Basin[J]. Journal of Northwest University (Natural Science Edition), 2003, 33(4): 447-450. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ200304020.htm
[21] 李文厚, 刘溪, 张倩, 等. 鄂尔多斯盆地中晚三叠世延长期沉积演化[J]. 西北大学学报(自然科学版), 2019, 49(4): 605-621. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ201904014.htm
Li W H, Liu X, Zhang Q, et al. Deposition evolution of Middle-Late Triassic Yanchang Formation in Ordos Basin[J]. Journal of Northwest University (Natural Science Edition), 2019, 49(4): 605-621. https://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ201904014.htm
-
图(9)
表(2)
计量
- 文章访问数: 463
- PDF下载数: 21
- 施引文献: 0