涠西南凹陷TY油田断层封闭性定量评价
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摘要
涸西南凹陷低凸起TY油田的块1构造为涠洲组的断块圈闭,高部位F_2断层是成藏主控因素。从断层封闭机理及影响因素入手,综合考虑岩石泥质含量及压实强度,建立了岩石排驱压力与深度和泥质含量的定量关系式,利用该关系式分别计算目标储层和起封堵作用断层岩的排驱压力,对二者大小进行比较,实现定量评价断层封闭性。利用该方法对涠西南凹陷TY油田块1控圈断层F_2的侧向封闭能力进行了分析。结果表明,H1和H2两个目的层对接的断层岩的排驱压力大于储层的排驱压力,具有封闭能力;H3和H4两层对接的断层岩与储层的排驱压力差为负值,不具备封闭油气能力。
Block 1 of the low uplifted TY Oilfield in the Weixinan Sag is within a fault trap of the Weizhou Formation and the F_2 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 vas used to analyze the lateral sealing ability of the F_2 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.
Block 1 of the low uplifted TY Oilfield in the Weixinan Sag is within a fault trap of the Weizhou Formation and the F_2 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 vas used to analyze the lateral sealing ability of the F_2 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.
引文
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[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.1000-0976.2013.10.002FU Guang,XIA Yunqing.Difference between fault-j uxtaposition 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:1000-5 870.2006.01.002ZHAO 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.-2005.01.012ZHAO 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.-007WANG Jiao,SHU Qinglin.Fault sealing ability and hydrocarbon accumulation of the lower member of Guantao Formation in southwe st 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:0253-2697.2009.06.005LYU 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/dkyqt201504011WANG 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.2095-4107.2010.05.006LU 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.-1009-9603.2011.01.001SONG Guoqi,XIANG Lihong,HAO Xuefeng,et al.Quantitatively forecasting on lateral sealing performance of fault by displacement pressure method:Case of Jiyang Depres sion[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.1674-5086.2017.03.31.03LI 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:10.1188 5/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/syxb201404008FU 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.2016.02.20LU 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/syxb2013S1009FU Guang,YANG Mian,LU 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):11-16doi:10.3787/j.issn.1000-0976.2017.10.002FU 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.1000-0976.2016.10.004FU Guang,ZMAN Mingwang.Geological conditions for lateral sealing of active faults and relevant research meth ods[J].Natural Gas Industry,2016,36(10):28-34.doi10.3787/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.1674-5086.2011.05.024YE Shuangjiang,JIANG Hanqiao,SUN Chuanzong,et al Productivity evaluation for horizontal well and analysis of fault sealing impacts in faulted block rservoirs[J].Journa 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:1000-2383.2008.04.015WU 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,200833(4):572-576.doi:10.13321/j.issn:1000-2383.2008.04015
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