A Quantitative Evaluation of Fault Sealing of the TY Oilfield in the Weixinan Sag

doi:10.11885/j.issn.1674-5086.2018.09.29.01

Abstract

Abstract: Block 1 of the low uplifted TY Oilfield in the Weixinan Sag is within a fault trap of the Weizhou Formation and the F₂ fault at a higher position is the key factor in reservoir formation. This study assessed the mechanisms and influencing factors of fault sealing to comprehensively consider the mud content and compaction levels of rocks to establish the quantitative relationships between the driving pressure of rocks and their depth and mud content. Relationship equations were employed to calculate the driving pressure of the target reservoir layers and the fault rocks which serve as a blockage. The two values were compared in a quantitative evaluation of fault sealing. The proposed method was used to analyze the lateral sealing ability of the F₂ fault of Block 1 of the TY Oilfield in the Weixinan Sag. The results suggest that the driving pressure of the fault rocks connecting the two target layers H1 and H2 is greater than that of the reservoir layers; thus, the fault rocks are capable of sealing. Meanwhile, the faults rocks connecting H3 and H4 have a smaller driving pressure to that of the reservoir layers; thus, they cannot seal oil and gas.

Key words: Weixinan Sag, fracture, driving pressure difference, fault sealing, quantitative evaluation

CLC Number:

TE122

WU Bibo, ZOU Mingsheng, LU Jiang, YAN Heng, ZENG Xiaoming. A Quantitative Evaluation of Fault Sealing of the TY Oilfield in the Weixinan Sag[J]. 西南石油大学学报(自然科学版), 2019, 41(4): 74-80.

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References

[1] 宋国奇,刘克奇. 断层两盘裂缝发育特征及石油地质意义[J]. 油气地质与采收率, 2009, 16(4):1-3. doi:10.3969/j.issn.1009-9603.2009.04.001 SONG Guoqi, LIU Keqi. Fracture characteristics around faults and their significance in petroleum accumulation[J]. Petroleum Geology and Recovery Efficienfy, 2009, 16(4):1-3. doi:10.3969/j.issn.1009-9603.2009.04.001
[2] 陆友明,牛瑞卿. 封闭性断层形成机理及研究方法[J]. 天然气地球科学, 1999, 10(5):12-16.LU Youming, NIU Ruiqing. The formation mechanism and research method of fault sealing[J]. Natural Gas Geoscience, 1999, 10(5):12-16.
[3] 付广,夏云清. 断层对接型和断层岩型侧向封闭的差异性[J]. 天然气工业,2013,33(10):11-17. doi:10.3787/j.issn.1000-0976.2013.10.002 FU Guang, XIA Yunqing. Difference between fault-juxtaposition and fault-rock lateral seals[J]. Natural Gas Industry, 2013, 33(10):11-17. doi:10.3787/j.issn.1000-0976.2013.10.002
[4] 赵密福,李阳,张煜,等. 断层两盘岩性配置关系及断层的封闭性[J]. 中国石油大学学报(自然科学版), 2006, 30(1):7-11. doi:10.3321/j.issn:1000-5870.2006.01.002 ZHAO Mifu, LI Yang, ZHANG Yu, et al. Relation of cross-fault lithology juxtaposition and fault sealing[J]. Journal of China University of Petroleum (Edition of Natural Science), 2006, 30(1):7-11. doi:10.3321/j.issn:1000-5870.2006.01.002
[5] ENGELDE J T. Cateclasis and the generation of fault gouge[J]. Geological Society of America Bulletin, 1974, 85(3):1515-1522. doi:10.1130/0016-7606(1974)-85<1515:CATGOF>2.0.CO;2
[6] YIELDING G, FREEMAN B, Needham D T. Quantitative fault seal prediction[J]. AAPG Bulletin, 1997, 81(6):897-917.
[7] BRETAN P, YIELDING G, JONES H. Using calibrated shale gouge ratio to estimate hydrocarbon column heights[J]. AAPG Bulletin, 2003, 87(3):397-413. doi:10.1306/08010201128
[8] 赵密福,李阳,李东旭. 泥岩涂抹定量研究[J]. 石油学报,2005,26(1):60-64. doi:10.3321/j.issn:0253-2697.2005.01.012 ZHAO Mifu, LI Yang, LI Dongxu. Quantitative study of shale smear[J]. Acta Petroleum Sinica, 2005, 26(1):60-64. doi:10.3321/j.issn:0253-2697.2005.01.012
[9] 王蛟,束青林. 孤岛油田西南缘馆下段断层封闭性与油气成藏[J]. 西南石油大学学报(自然科学版), 2010, 32(5):47-53. doi:10.3863/j.issn.1674-5086.2010.05.007 WANG Jiao, SHU Qinglin. Fault sealing ability and hydrocarbon accumulation of the lower member of Guantao Formation in southwest Gudao Oilfield[J]. Journal of Southwest Petroleum University (Seience & Technology Edition), 2010, 32(5):47-53. doi:10.3863/j.issn.1674-5086.2010.05.007
[10] 吕延防,黄劲松,付广,等. 砂泥岩薄互层段中断层封闭性的定量研究[J]. 石油学报, 2009, 30(6):824-828. doi:10.3321/j.issn:0253-2697.2009.06.005 LYU Yanfang, HUANG Jinsong, FU Guang, et al. Quantitative study on fault sealing ability in sandstone and mudstone thin interbed[J]. Acta Petroleum Sinica, 2009, 30(6):824-828. doi:10.3321/j.issn:0253-2697.2009.06.005
[11] 汪晓萌,李慧勇,茆利,等. 曹妃甸21-3构造馆陶组断层封闭性研究[J]. 断块油气田, 2015, 22(4):458-463. doi:10.6056/dkyqt201504011 WANG Xiaomeng, LI Huiyong, MAO Li, et al. Study on fault sealing properties of Guantao Formation in Caofeidian 21-3 structure, Chengbei Sag, offshore Bohai Bay Basin[J]. Fault-Block Oil & Gas Field, 2015, 22(4):458-463. doi:10.6056/dkyqt201504011
[12] 吕延防,王帅. 断层封闭性定量评价[J]. 大庆石油学院学报, 2010, 34(5):35-40. doi:10.3969/j.issn.2095-4107.2010.05.006 LÜ Yanfang, WANG Shuai. Quantitative evaluation of fault lateral sealing[J]. Journal of Daqing Petroleum Institute, 2010, 34(5):35-40. doi:10.3969/j.issn.2095-4107.2010.05.006
[13] 宋国奇,向立宏,郝雪峰,等. 运用排替压力法定量预测断层侧向封闭能力——以济阳坳陷为例[J]. 油气地质与采收率, 2011, 18(1):1-3. doi:10.3969/j.issn.1009-9603.2011.01.001 SONG Guoqi, XIANG Lihong, HAO Xuefeng, et al. Quantitatively forecasting on lateral sealing performance of fault by displacement pressure method:Case of Jiyang Depression[J]. Petroleum Geology and Recovery Efficienfy, 2011, 18(1):1-3. doi:10.3969/j.issn.1009-9603.2011.01.001
[14] 李强,田晓平,何京,等. 断层封闭性定量表征及对油气富集的控制作用[J]. 西南石油大学学报(自然科学版), 2018, 40(4):40-50. doi:10.11885/j.issn.1674-5086.2017.03.31.03 LI Qiang, TIAN Xiaoping, HE Jing, et al. Quantitative characterization of fault sealing and its control on hydrocarbon accumulation[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2018, 40(4):40-50. doi:10.11885/j.issn.1674-5086.2017.03.31.03
[15] 付广,王浩然,胡欣蕾. 断层垂向封闭的断储排替压力差法及其应用[J]. 石油学报, 2014, 35(4):685-691. doi:10.7623/syxb201404008 FU Guang, WANG Haoran, HU Xinlei. Modification and application of fault-reservoir displacement pressure differential method for vertical sealing of faults[J]. Acta Petrolei Sinica, 2014, 35(4):685-691. 10.7623/syxb201404008
[16] 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. doi:10.11698/PED.2016.02.20 LÜ Yanfang, WANG Wei, HU Xinlei, et al. Quantitative evaluation method of fault lateral sealing[J]. Petroleum Exploration and Development, 2016, 43(2):310-316. doi:10.11698/PED.2016.02.20
[17] 付广,杨勉,吕延防,等. 断层古侧向封闭性定量评价方法及其应用[J]. 石油学报, 2013, 34(S1):78-83. doi:10.7623/syxb2013S1009 FU Guang, YANG Mian, LÜ Yanfang, et al. A quantitative evaluation method for ancient lateral sealing of fault[J]. Acta Petrolei Sinica, 2013, 34(S1):78-83. doi:10.7623/-syxb2013S1009
[18] 付广,王明臣,李世朝. 断层岩封闭性演化阶段确定方法及其应用[J]. 天然气工业, 2017, 37(10):11-16. doi:10.3787/j.issn.1000-0976.2017.10.002 FU Guang, WANG Mingchen, LI Shizhao. A method for determining the sealing capacity evolution stage of fault rocks and its application[J]. Natural Gas Industry, 2017, 37(10):11-16. doi:10.3787/j.issn.1000-0976.2017.10.002
[19] 付广,展铭望. 活动期断裂侧向封闭的地质条件及其研究方法[J]. 天然气工业, 2016, 36(10):28-34. doi:10.3787/j.issn.1000-0976.2016.10.004 FU Guang, ZHAN Mingwang. Geological conditions for lateral sealing of active faults and relevant research methods[J]. Natural Gas Industry, 2016, 36(10):28-34. doi:10.3787/j.issn.1000-0976.2016.10.004
[20] 叶双江,姜汉桥,孙传宗,等. 断块油藏水平井产能研究及断层封堵影响分析[J]. 西南石油大学学报(自然科学版),2011, 33(5):131-135. doi:10.3863/j.issn.1674-5086.2011.05.024 YE Shuangjiang, JIANG Hanqiao, SUN Chuanzong, et al. Productivity evaluation for horizontal well and analysis of fault sealing impacts in faulted block reservoirs[J]. Journal of Southwest Petroleum University (Seience & Technology Edition), 2011, 33(5):131-135. doi:10.3863/j.issn.1674-5086.2011.05.024
[21] 吴国平,苏江玉,成实,等. 基于自然伽马测井信号的维纳滤波法求取泥质含量[J]. 地球科学——中国地质大学学报, 2008, 33(4):572-576. doi:10.3321/j.issn:1000-2383.2008.04.015 WU Guoping, SU Jiangyu, CHENG Shi, et al. A method for obtaining shaliness using Wiener filtering based on logging data natural Gamma ray[J]. Earth Science Journal of China University of Geosciences, 2008, 33(4):572-576. doi:10.3321/j.issn:1000-2383.2008.04.015
[22] 陈亮,甘华军,祝春荣,等. 北部湾盆地涠西南凹陷沉降史研究[J]. 新疆石油学院学报, 2002, 14(4):12-17. doi:10.3969/j.issn.1673-2677.2002.04.004 CHEN Liang, GAN Huajun, ZHU Chunrong, et al. Study on subsidence history of Weixinan Depression in Beibuwan Basin[J]. Journal of Xinjiang Petroleum Institute, 2002, 14(4):12-17. doi:10.3969/j.issn.1673-2677.2002.04.004
[23] 朱伟林,江文荣. 北部湾盆地涠西南凹陷断裂与油气藏[J]. 石油学报, 1998, 19(3):6-10. ZHU Weilin, JIANG Wenrong. Analysis on forming conditions of lithologic trap in Liushagang Formation, Weixinan Sag of Baibuwan Basin[J]. Acta Petrolei Sinica, 1998, 19(3):6-10.
[24] 徐政语,俞广,吴炜强,等. 北部湾盆地东南部构造特征及控油作用分析[J]. 石油实验地质, 2014, 36(2):144-152. doi:10.11781/sysydz201402144 XU Zhengyu, YU Guang, WU Weiqiang, et al. Structural features and controlling on oils in southeastern Beibu Gulf Basin[J]. Petroleum Geology & Experiment, 2014, 36(2):144-152. doi:10.11781/sysydz201402144
[25] 赵永强. 北部湾盆地涠西勘查区反转构造及其油气成藏意义[J]. 石油实验地质, 2007, 29(5):457-461. doi:10.3969/j.issn.1001-6112.2007.05.004 ZHAO Yongqiang. Inversion structure and its implication to hydrocarbon accumulation in Weixi exploration region of the Beibuwan Basin[J]. Petroleum Geology & Experiment, 2007, 29(5):457-461. doi:10.3969/j.issn.1001-6112.2007.05.004