【作者】 夏在连；

【导师】 徐国强；

【作者基本信息】 成都理工大学 ， 矿产普查与勘探， 2005， 硕士

【摘要】 论文利用野外露头资料和钻、测井资料,制作人工合成地震记录,对工区进行了地震资料解释。应用平衡剖面技术对研究区的构造演化史进行了分析。结果表明,中三叠世晚期,北大巴山逆冲推覆构造形成并形成第一次逆冲高峰,同时,其南侧的南大巴山北带也连带活动,形成了须家河组与雷口坡组间的不整合。通过区域地震剖面的解释,得出工区主要以下三叠统富膏盐岩层为界,上下构造明显不协调,其上构造层全部卷入变形且构造变形相对强烈;下构造层表现为前滑脱面之下的多重叠覆褶皱;根据工区平面构造的展布,有目标的选择了工区南、中、北部3大构造圈闭集中分布区块进行地震精细解释并编制了3大区块内二叠系顶、上三叠统底、上三叠统须顶、凉高山组顶、沙溪庙组下段顶、沙溪庙组顶的分层构造图,进行圈闭分析。 1、工区构造样式主要以挤压构造为主:构造样式多样,主要发育叠瓦断列带、冲起构造、箱状背斜、倒转背斜、断层相关背斜; 2、研究区圈闭主要为背斜圈闭,圈闭受构造控制,断层对圈闭的控制作用表现为完整的背斜圈闭向断鼻圈闭转化,分化构造高点,构造裂缝发育; 3、工区界牌1井为为低幅背斜圈闭,断鼻圈闭,其断层是否具有封堵性,值得怀疑,因此未能形成工业性油气流; 4、工区中部磨子坪-瓦房湾区块发育一系列构造规模中等,背斜圈闭完整,闭合度高,面积大,构造裂缝发育的圈闭,建议在磨子坪背斜进行钻探,有望在此取得油气突破。更多还原

【Abstract】 Based on data of outcrop、 drilling and logging, we made synthetic seismogram, and using them in seismic data interpretation. The Balanced cross section technique is used to Analyses the tectonic evolution of work area. The results recovered The Thrusting-nappe structures of North Daba mountain were formed and the first thrust . At same time , the South Daba mountain formed unconformity of the Xujiahe formation and Leikoupo formation in Triassic. Through the regional seismic data interpretation, we educed that the low Triassic gypsum divide two layers the upper layer and the low layer. The upper layer, structural stratums all engulf deformation; the low structural layer, below stratums gliding plane develop multiple imbricate fold. Under the distribution of structures, we choose three areas for fine seismic interpretation and made the structural diagram of various formations:1、 The key tectonics styles of the area are compressive structures; there are Imbricate fault zone 、 Box anticline、 Reversed anticline、 fault—related fold.2、 The traps are mainly anticline traps, controlled by structure .The control action of faults to traps made the full anticline traps transformed fault traps .3、 The traps of the Jiepai 1 well is low-range anticline traps and fault trap .weather the fault have seal is not sure ,so the trap preserve not good,the well is the industry oil-well.4、 In the middle of the area, there are a series of anticline-traps,the closure is thick ,the acreage is large ,the structure fracture develop on the trap, we propose drilling on Moziping anticline-trap.更多还原