Evaluation of vertical sealability of Binhai-Gangxi fault in Qikou Sag Bohai Bay Basin
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摘要: 为实现对断层垂向封堵性的定量化评价,本文以歧口凹陷滨海-港西断层为例,依据钻井、测井、三维地震等相关资料,建立了基于侧向封堵系数的地质模型。通过计算断层的侧向断-储排替压差,并将断层周边钻井侧向封堵能力强弱与表征垂向封堵的泥岩涂抹法相耦合,得出滨海-港西断层临界泥岩涂抹系数值为6.2,依此定量化的评价得出滨海-港西断层上古生界地层垂向封堵性,并加以验证。结果表明:滨海-港西断层上古生界整体垂向封堵性好,北西段与中段部分区段垂向封堵性差。研究结果对构造背景复杂的研究区油气勘探具有指导与借鉴意义。Abstract: In order to accurately and quantitatively evaluate the vertical sealability of the fault, this paper, taking the Binhai-Gangxi fault in the Qikou Sag as an example, makes full use of relevant data such as drilling, logging, and 3D seismic as the basis to establish a lateral plugging coefficient of the geological model, calculate the lateral fault-reservoir displacement pressure difference of the fault, and couple the lateral plugging ability of drilling around the fault with the mudstone smearing method that characterizes the vertical plugging.It is calculated that the critical mudstone smear coefficient value of the fault is 6.2.Based on this quantitative evaluation, the vertical sealability of the Upper Paleozoic strata of the Binhai-Gangxi fault is obtained and verified.The results show that the upper Paleozoic of the Binhai-Gangxi fault has good vertical plugging properties as a whole, but the northwest section and the middle section have poor vertical plugging properties.The research results provide guidance and reference for oil and gas exploration in research area with complex structure background.
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表 1 港西-滨海断层上古生界侧向封堵性评价
Table 1. Upper paleozoic lateral sealability evaluation table of Binhai-Gangxi fault
井位 埋深/m 储集层泥质含量/% 储层排替压力/MPa 断层岩泥质含量/% 断层岩排替压力/MPa A点埋深/m 断-储压差/MPa 测井解释 T7X1 1 880 11.44 0.555 26.58 1.099 989 0.544 — T9 2 970 20.25 2.228 44.11 3.944 1 470 1.716 致密层 F7 2 576 18.79 1.661 42.99 3.297 1 329 1.636 干层 T12 1 914 8.92 0.406 15.35 0.331 734 -0.075 水层 T6 2 792 7.75 0.559 18.69 0.534 844 -0.025 水层 G87 1 970 11.17 0.572 22.86 0.453 615 -0.119 油浸 G13 1 789 13.66 0.659 25.34 0.624 695 -0.035 油斑 G59 1 988 10.53 0.535 30.13 1.996 1 330 1.461 — H1605 2 098 22.18 1.575 48.54 3.570 1 245 1.995 干层 G148 1 873 22.24 1.356 43.29 2.173 983 0.817 致密层 G144 1 924 16.77 0.960 45.12 2.632 1 078 1.672 油斑 H1603 1 765 19.48 1.046 28.74 2.014 1 403 0.968 致密层 H4-1 1 851 20.13 1.166 52.17 2.553 914 1.387 致密层 G3 2 125 11.43 0.654 31.22 1.424 1 011 0.770 — T5 2 280 7.84 0.432 24.65 0.559 877 0.127 水层 H1505 2 315 10.22 0.631 28.23 0.834 936 0.203 干层 T4 1 970 13.50 0.739 27.88 1.770 1 320 1.031 干层 H1-1 1 778 18.19 0.963 43.43 1.731 1 149 0.768 油层 H1501 2 286 21.37 1.682 48.38 2.955 1 093 1.273 油层 S71-1 3 196 10.13 0.964 30.46 2.605 1 588 1.641 煤层 T10 2 586 14.13 1.135 37.77 2.737 1 326 1.602 油浸 Z1502 2 674 12.49 1.005 32.21 2.094 1 287 1.089 干层 H1503 2 564 18.16 1.576 41.22 3.429 1 425 1.853 干层 T14 2 712 17.42 1.608 23.21 0.812 914 -0.796 水层 S6 3 160 15.17 1.640 21.32 0.963 1 123 -0.677 水层 S5 3 722 21.36 3.249 29.45 3.062 1 841 -0.187 水层 B31 4 560 9.91 1.514 24.34 2.813 2 098 1.299 — 表 2 临界排替压差与测井解释的垂向封堵关系
Table 2. Relationship between critical displacement pressure difference and vertical pluggability of logging interpretation
侧向断-储排替压差/MPa 测井解释 垂向封堵性 >0.127 显水层 不封堵 油、致密层 封堵 干层 未知 <0.127 显水层 未知 干层 未知 表 3 邻近层位的测井解释与垂向封堵关系
Table 3. Relation ship between logging interpretation and vertical plugging of adjacent horizons
井位 埋深/m 测井解释 垂向封堵性 F7 2 552.6 致密层 封堵 G87 1 946 油层 封堵 G13 1 795.4 致密层 封堵 H1605 2 114.3 油气层 封堵 H1505 2 338 差油层 封堵 Z1502 2 648 致密层 封堵 H1503 2 503 油层 封堵 S5 — — 封堵 B31 4 560 水层 不封堵 S6 3 166 水层 不封堵 -
[1] 邵卓娜. 断层封堵定量评价技术研究与应用[D]. 东营: 中国石油大学(华东), 2014. [2] 杨智, 何生, 王锦喜, 等. 断层泥比率(SGR)及其在断层侧向封闭性评价中的应用[J]. 天然气地球科学, 2005, 16(3): 347-351. doi: 10.3969/j.issn.1672-1926.2005.03.019Yang Zhi, He Sheng, Wang Jinxi, et al. Shale gouge ratio and its application in the fault sealestimation across the faulted zone[J]. Natural Gas Geoscience, 2005, 16(3): 347-351. doi: 10.3969/j.issn.1672-1926.2005.03.019 [3] 郑秀娟, 于兴河, 王彦卿. 断层封闭性研究的现状与问题[J]. 大庆石油地质与开发, 2004, 23(6): 19-21. doi: 10.3969/j.issn.1000-3754.2004.06.008Zheng Xiujuan, Yu Xinghe, Wang Yanqing. Status quo of research on fault sealing capacity and existent problems[J]. Petroleum Geology & Oilfield Development in Daqing, 2004, 23(6): 19-21. doi: 10.3969/j.issn.1000-3754.2004.06.008 [4] 赵密福, 信荃麟, 李亚辉, 等. 断层封闭性的研究进展[J]. 新疆石油地质, 2001, 22(3): 258-261, 279. doi: 10.3969/j.issn.1001-3873.2001.03.025Zhao Mifu, Xin QuanLin, Li Yahui, et al. In study on fault sealing[J]. Xinjiang Petroleum Geology, 2001, 22(3): 258-261, 279. doi: 10.3969/j.issn.1001-3873.2001.03.025 [5] 罗胜元, 何生, 王浩. 断层内部结构及其对封闭性的影响[J]. 地球科学进展, 2012, 27(2): 154-164. https://www.cnki.com.cn/Article/CJFDTOTAL-DXJZ201202003.htmLuo Shengyuan, He Sheng, Wang Hao. Review on fault internal structure and the influence on fault sealing ability[J]. Advances in Earth Science, 2012, 27(2): 154-164. https://www.cnki.com.cn/Article/CJFDTOTAL-DXJZ201202003.htm [6] 吕延防, 陈发景. 非线性映射分析判断断层封闭性[J]. 石油学报, 1995, 16(2): 36-41. doi: 10.3321/j.issn:0253-2697.1995.02.006Lü Yanfang, Chen Fajing. Judgement of fault sealing by nonlinear mapping analysis[J]. Acta Petrolei Sinica, 1995, 16: (2): 36-41. doi: 10.3321/j.issn:0253-2697.1995.02.006 [7] 张立宽, 罗晓容, 宋国奇, 等. 油气运移过程中断层启闭性的量化表征参数评价[J]. 石油学报, 2013(1): 92-100. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201301009.htmZhang Likuan, Luo Xiaorong, Song Guoqi, et al. Evaluation of quantitative characterization parameters of fault opening and closing in the process of hydrocarbon migration[J]. Acta Petrolei Sinica, 2013(1): 92-100. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201301009.htm [8] 曹瑞成, 陈章明. 早期勘探区断层封闭性评价方法[J]. 石油学报, 1992(1): 13-22. doi: 10.3321/j.issn:0253-2697.1992.01.006Cao Ruicheng, Chen Zhangming. Evaluation method of fault sealing in early exploration area[J]. Acta Petrolei Sinica, 1992(1): 13-22. doi: 10.3321/j.issn:0253-2697.1992.01.006 [9] 金崇泰, 付晓飞, 柳少波. 断层侧向封堵性评价方法综述[J]. 断块油气田, 2012, 19(3): 297-301.Jin Chongtai, Fu Xiaofei, Liu Shaobo. Review on evaluation methods of lateral sealing of fault[J]. Fault-Block Oil & Gas Field, 2012, 19(3): 297-301. [10] 周立宏, 韩国猛, 董越崎, 等. 渤海湾盆地歧口凹陷滨海断鼻断-砂组合模式与油气成藏[J]. 石油勘探与开发, 2019, 46(5): 869-882. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201905007.htmZhou Lihong, Han Guomeng, Dong Yueqi, et al. Fault-sand combination modes and hydrocarbon accumulation in Binhai fault nose of Qikou Sag, Bohai Bay Basin, East China[J]. Petroleum Exploration and Development, 2019, 46(5): 869-882. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201905007.htm [11] 崔宇, 李宏军, 付立新, 等. 歧口凹陷北大港构造带奥陶系潜山储层特征、主控因素及发育模式[J]. 石油学报, 2018, 39(11): 1241-1252. doi: 10.7623/syxb201811004Cui Yu, Li Hongjun, Fu Lixin, et al. Characteristics, main controlling factors and development model of Ordovician buried-hill reservoir in Beidagang structural belt, Qikou sag[J]. Earth Science Frontiers, 2018, 39(11): 1241-1252. doi: 10.7623/syxb201811004 [12] 王芝尧, 侯素英, 刘志英. 歧口凹陷古近纪构造演化及其对油气成藏的影响[J]. 现代地质, 2013, 27(3): 681-687. doi: 10.3969/j.issn.1000-8527.2013.03.020Wang Zhiyao, Hou Suying, Liu Zhiying. Structural evolution of Paleogene and its affect on lithologic reservoir in Qikou sag[J]. Geoscience, 2013, 27(3): 681-687. doi: 10.3969/j.issn.1000-8527.2013.03.020 [13] 蒋有录, 刘学嘉, 赵贤正, 等. 根据储层沥青和流体包裹体综合判识油气成藏期: 以黄骅坳陷北大港古生界潜山为例[J]. 地球科学, 2020, 45(3): 980-988.Jiang Youlu, Liu Xuejia, Zhao Xianzheng, et al. Comprehensive identification of oil and gas accumulation period by fluid inclusion technique and reservoir bitumen characteristics: a case study of the paleozoic buried hill in beidagang, Huanghua depression[J]. Earth Science, 2020, 45(3): 980-988. [14] 王洪宇, 付晓飞, 王海学, 等. 渤海湾盆地歧口凹陷断裂活动定量分析和评价对油气成藏的控制作用研究[J]. 地质学报, 2020, 94(10): 3062-3073. doi: 10.3969/j.issn.0001-5717.2020.10.018Wang Hongyu, Fu Xiaofei, Wang Haixue, et al. Research on the controlling effect of quantitative analysis and evaluation of fault activity on oil and gas accumulation in Qikou sag of Bohai bay basin[J]. Acta Geologica Sinica, 2020, 94(10): 3062-3073. doi: 10.3969/j.issn.0001-5717.2020.10.018 [15] 张东东, 刘池洋, 黄翼坚, 等. 歧口凹陷北大港凸起构造带形成演化及其油气意义[J]. 地学前缘, 2015, 22(3): 129-136.Zhang Dongdong, Liu Chiyang, Huang Yijian, et al. Uplifting characteristics and its petroleum significance of Beidagang salient tectonic belt in Qikou sag[J]. Earth Science Frontiers, 2015, 22(3): 129-136. [16] Pu X G, Zhou L H, Wang W G, et al. Medium-deep clastic reservoirs in the slope area of Qikou sag, Huanghua depression, Bohai Bay Basin[J]. Petroleum Exploration and Development, 2013, 40(1): 38-51. doi: 10.1016/S1876-3804(13)60004-X [17] Conrad C, Manzocchi T, Walsh J J, et. al. A geometric model of fault zone and fault rock thickness variations[J]. Journal of Structural Geology, 2009, 31(2): 117-127. doi: 10.1016/j.jsg.2008.08.009 [18] 付晓飞, 许鹏, 魏长柱, 等. 张性断裂带内部结构特征及油气运移和保存研究[J]. 地学前缘, 2012, 19(6): 200-212.Fu Xiaofei, Xu Peng, Wei Changzhu, et al. Internal structure of normal fault zone and hydrocarbon migration and conservation[J]. Earth Science Frontiers, 2012, 19(6): 200-212. [19] 吴孔友, 李继岩, 崔世凌, 等. 断层成岩封闭及其应用[J]. 地质力学学报, 2011, 17(4): 350-360. doi: 10.3969/j.issn.1006-6616.2011.04.005Wu Kongyou, Li Jiyan, Cui Shiling, et al. Diagenetic sealing characteristics of faulting zone and its application[J]. Journal of Geomechanics, 2011, 17(4): 350-360. doi: 10.3969/j.issn.1006-6616.2011.04.005 [20] Schmatz J, Vrolijk P J, Urai J L. Clay smear in normal fault zones-The effect of multilayers and clay cementation in water-saturated model experiments[J]. Journal of Structural Geology, 2010, 32(11): 1834-1849. doi: 10.1016/j.jsg.2009.12.006 [21] 吕延防, 王伟, 胡欣蕾, 等. 断层侧向封闭性定量评价方法[J]. 石油勘探与开发, 2016, 43(2): 310-316. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201602024.htmLv Yanfang, Wang Wei, Hu Xinlei, et al. Quantitative evaluation method of fault lateral sealing[J]. Petroleum Exploration and Development, 2016, 43(2): 310-316. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201602024.htm [22] 史集建, 李丽丽, 杜琳, 等. 断层对盖层的动态破坏及其对油气输导的影响: 以渤海湾盆地歧口凹陷港东断裂为例[J]. 石油学报, 2019, 40(8): 956-964.Shi Jijian, Li Lili, Du Lin, et al. Dynamic damage of fault to caprock and its influence on hydrocarbon transport: a case study of Gangdong fault in Qikou sag, Bohai Bay Basin[J]. Acta Petrolei Sinica, 2019, 40(8): 956-964. [23] 鲁兵, 丁文龙, 刘忠, 等. 断层封闭性研究进展[J]. 地质科技情报, 1998, 17(3): 76-81. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ803.013.htmLu Bing, Ding Wenlong, Liu Zhong, et al. Advances of research on fault sealing[J]. Geological Science and Technology Information, 1998, 17(3): 76-81. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ803.013.htm [24] 邢卫新, 汤达祯, 杨铭, 等. 断层封堵性定量研究在复杂断块油藏中的应用[J]. 石油物探, 2006, 45(3): 250-255, 16. doi: 10.3969/j.issn.1000-1441.2006.03.008Xing Weixin, Tang Dazhen, Yang Ming, et al. Application of quantitative fault seal prediction in complex fault blocks[J]. Geophysical Prospecting for Petroleum, 2006, 22(3): 250-255, 16. doi: 10.3969/j.issn.1000-1441.2006.03.008 [25] Fristad T, Groth A, Yielding G, et al. Quantitative fault seal prediction: a case study from Oseberg Syd[J]. Norwegian Petroleum Society Special Publications, 1997, 7: 107-124. http://www.sciencedirect.com/science/article/pii/S0928893797800100