徐家围子断陷控陷断裂活动特征及其对断陷的控制作用
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摘要
徐家围子断陷是深层天然气勘探的重要领域,控陷断裂的活动性决定了徐家围子断陷的形成。为了搞清徐家围子断陷控陷断裂的活动性及其对断陷的控制作用,在三维地震剖面的解释、断面产状、断距解剖、断陷结构及地层厚度分析的基础上进行了系统研究。结果表明:徐家围子断陷发育北东向、北北东向和北西向控陷断裂,其控制了徐家围子断陷的沉积和断陷的发育;控陷断裂活动具有多期性,各个沉积时期的控陷断裂活动强度具有分段性和完整性;控陷断裂的活动特征决定了徐家围子断陷结构差异,南部为不对称双断式断陷,中部为复式箕状断陷,北部为箕状断陷;沙河子组沉积时期徐家围子断陷发育宋西、徐西、徐中和徐东4条控陷断裂,在火石岭组、沙河子组沉积时期活动;沙河子组沉积时期盆地具有由小变大的趋势,沉降中心沿控陷断层下降盘呈珠串状展布。
Xujiaweizi Fault Depression is the important field of deep natural gas exploration, the activity of the depression-controlling fault determines the formation of Xujiaweizi Fault Depression. In order to clarify the activity of the subsidence-controlling fault in Xujiaweizi Fault Depression and its controlling action on the depression, the systematical study was conducted on the bases of the interpretation of three-dimensional seismic profiles, the occurrence of the cross-sections, the anatomy of the fault spacing, the structure of the depression and the analysis of the stratum thickness maps. The results show that there are NE, NNE and NW trending subsidence-controlling faults in Xujiaweizi Fault Depression, which control the deposition and development of Xujiaweizi Fault Depression; the activities of the subsidence-controlling faults possess multistage property, and the activity intensity of the subsidence-controlling faults in each sedimentary period is piecewise and integral; the activity characteristics of the subsidence-controlling faults determine the difference of the structure of Xujiaweizi Fault Depression, the asymmetric double-fault depression is in the south part, the complex dustpan fault depression is in the central part and the dustpan fault depression is in the northern part;during the sedimentary period of Shahezi Formation, four subsidence-controlling faults, namely Songxi, Xuxi, Xuzhong and Xudong faults were developed in Xujiaweizi Fault Depression, which continued to move during the sedimentary period of Huoshiling Formation and Shahezi Formation;during the sedimentary period of Shahezi Formation, the basin tended to grow from small to large, and the subsidence centers were distributed in beads along the descending wall of the depression-controlling faults.
Xujiaweizi Fault Depression is the important field of deep natural gas exploration, the activity of the depression-controlling fault determines the formation of Xujiaweizi Fault Depression. In order to clarify the activity of the subsidence-controlling fault in Xujiaweizi Fault Depression and its controlling action on the depression, the systematical study was conducted on the bases of the interpretation of three-dimensional seismic profiles, the occurrence of the cross-sections, the anatomy of the fault spacing, the structure of the depression and the analysis of the stratum thickness maps. The results show that there are NE, NNE and NW trending subsidence-controlling faults in Xujiaweizi Fault Depression, which control the deposition and development of Xujiaweizi Fault Depression; the activities of the subsidence-controlling faults possess multistage property, and the activity intensity of the subsidence-controlling faults in each sedimentary period is piecewise and integral; the activity characteristics of the subsidence-controlling faults determine the difference of the structure of Xujiaweizi Fault Depression, the asymmetric double-fault depression is in the south part, the complex dustpan fault depression is in the central part and the dustpan fault depression is in the northern part;during the sedimentary period of Shahezi Formation, four subsidence-controlling faults, namely Songxi, Xuxi, Xuzhong and Xudong faults were developed in Xujiaweizi Fault Depression, which continued to move during the sedimentary period of Huoshiling Formation and Shahezi Formation;during the sedimentary period of Shahezi Formation, the basin tended to grow from small to large, and the subsidence centers were distributed in beads along the descending wall of the depression-controlling faults.
引文
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[2] 李钰玮,陈均亮,张莹,等.徐家围子断陷徐中断裂特征及形成机制[J].大庆石油地质与开发,2018,37(2):34-39.LI Yuwei,CHEN Junliang,ZHANG Ying,et al.Characteristics and generating mechanism of Xuzhong Fault in Xujiaweizi Fault Depression[J].Petroleum Geology & Oilfield Development in Daqing,2018,37(2):34-39.
[3]于丹,吕延防,付晓飞,等.松辽盆地北部徐家围子断陷断裂构造特征及对深层天然气的控制作用[J].地质论评,2010,56(2):237-245.YU Dan,LV Yanfang,FU Xiaofei,et al.Characteristics of fault structure and its control on deep gas reservoir in Xujiaweizi Fault Depression,Songliao Basin[J].Geological Review,2010,56(2):237-245.
[4]张尔华,姜传金,张元高,等.徐家围子断陷深层结构形成与演化的探讨[J].岩石学报,2010,26(1):149-157.ZHANG Erhua,JIANG Chuanjin,ZHANG Yuangao,et al.Study on the formation and evolution of deep structure of Xujiaweizi Fault Depression[J].Acta Petrologica Sinica,2010,26(1):149- 157.
[5]张元高,陈树民,张尔华,等,徐家围子断陷构造地质特征研究新进展[J].岩石学报,2010,26(1):142-148.ZHANG Yuangao,CHEN Shumin,ZHANG Erhua,et al.The new progress of Xujiaweizi Fault Depression characteristics of structural geology research[J].Acta Petrologica Sinica,2010,26(1):142-148.
[6]陈均亮,蔡希源,林春华,等.松辽盆地北部断陷盆地构造特征与幕式演化[J].石油学报,1999,20(4):14-18.CHEN Junliang,CAI Xiyuan,LIN Chunhua,et al.Tectonic characteristics and episodic evolution of the northern fault depression in Songliao Basin[J].Acta Petrolei Sinica,1999,20(4):14-18.
[7]夏斌,邱亮斌,蔡周荣,等.徐家围子断陷应力场变化特征及“S”型构造格局成因探讨[J].天然气地球科学,2011,22(3):465-477.XIA Bin,QIU Liangbin,CAI Zhourong,et al.Characteristics of stress field and mechanism of “S” structure pattern in Xujiaweizi Rift Sag[J].Natural Gas Geoscience,2011,22(3):465-477.
[8]方立敏,李玉喜,殷进垠,等.松辽盆地断陷末期反转构造特征与形成机制[J].石油地球物理勘探,2003,38(2):190-193.FANG Limin,LI Yuxi,YIN Jinyin,et al.Characters of reverse tectonics and its forming mechanism in late of fault depression in Songliao Basin[J].Oil Geophysical Prospecting,2003,38(2):190-193.
[9]张文婧,任延广,陈均亮,等.松辽盆地徐家围子断陷挤压变形特征[J].大庆石油地质与开发,2008,27(4):21-25.ZHANG Wenjing,REN Yanguang,CHEN Junliang,et al.Characteristic of compression deformation of Xujiaweizi Rift in Songliao Basin[J].Petroleum Geology & Oilfield Development in Daqing,2008,27(4):21-25.
[10]蒙赵红,陈均亮,张晓东,等.徐家围子断陷断层相关褶皱类型及演化模式[J].大庆石油地质与开发,2015,34(1):7-10.MENG Zhaohong,CHEN Junliang,ZHANG Xiaodong,et al.Types and evolutionary models of the fault-related folds in Xujiaweizi Fault Depression[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(1):7-10.
[11]蔡全升,胡明毅,胡忠贵,等.强烈断陷期小型湖盆沉积充填演化特征[J].石油与天然气地质,2017,38(2):259-269.CAI Quansheng,HU Mingyi,HU Zhonggui,et al.Sedimentary filling evolution of small-scale lake basins during intensive faulting[J].Oil & Gas Geology,2017,38(2):259-269.
[12]蔡全升,胡明毅,陈孝红,等.小型断陷湖盆扇三角洲沉积特征与发育模式[J].岩性油气藏,2018,30(1):86-96.CAI Quansheng,HU Mingyi,CHEN Xiaohong,et al.Sedimentary characteristics and development model of fan delta in small faulted basin[J].Lithologic Reservoirs,2018,30(1):86-96.
[13]卲曌一,吴朝东,张大智,等.松辽盆地徐家围子断陷沙河子组储层特征及控制因素[J].石油与天然气地质,2019,40(1):101-108.SHAO Zhaoyi,WU Chaodong,ZHANG Dazhi,et al.Reservoir characteristics and controlling factors of Shahezi Formation in Xujiaweizi Fault Depression,Songliao Basin[J].Petroleum & Natural Gas Geology,2019,40(1):101-108.
[14]赵静,白连德.松辽盆地南部火山岩优质储层主控因素[J].特种油气藏,2016,23(3):52-56.ZHAO Jing,BAI Liande.Main controlling factors of high-quality volcanic reservoir in Southern Songliao Basin[J].Special Oil & Gas Reservoirs,2016,23(3):52-56.
[15]陈欢庆,胡永乐,闫林,等.徐东地区营城组一段火山岩储层综合定量评价[J].特种油气藏,2016,23(1):21-24.CHEN Huanqing,HU Yongle,YAN Lin,et al.Comprehensive quantitative evaluation of Yingcheng 1 volcanic reservoirs in Xudong[J].Special Oil & Gas Reservoirs,2016,23(1):21-24.
[16]张莹.控陷断裂断面结构与盆地建造和改造作用的关系:以徐家围子断陷为例[J].石油地质与工程,2018,32(2):1-5.ZHANG Ying.Relationship between the depression-controlling fault plane structure and the construction and reformation of the basin[J].Petroleum Geology & Engineering,2018,32(2):1-5.
[17]杨立伟.升平气田气藏条件及成藏模式[J].西部探矿工程,2017,29(4):92-96YANG Liwei.Gas reservoir conditions and accumulation model of Shengping Gas Field[J].West-China Exploration Engineering,2017,29(4):92-96