【作者】 马晓东；

【导师】 王良书；

【作者基本信息】 南京大学 ， 构造地质学， 2013， 硕士

【摘要】 溱潼凹陷是苏北盆地的主要富油凹陷之一,以往的勘探和研究只局限于搞清局部的断块构造,未对全区系统的进行连片地震资料解释和编图,因此对区域构造特征及油气富集规律认识不足。针对上述问题,本论文通过应用构造地质、地球物理、石油地质等多学科的理论、技术及方法,·对苏北盆地溱潼凹陷的断裂系统、构造样式、构造演化、油气成藏特征和有利勘探区作了较为系统的研究,取得了如下主要成果及认识：1、通过研究区多口井的合成记录制作,对研究区10个反射层进行了准确标定,并采用井震联合统层技术对钻井分层与地震分层进行统层,做到井震统一,最终明确了各地震反射层的波组特征,编制了7层主要目的层的平面构造图；2、溱潼凹陷整体可划分成断阶带、深凹带、内斜坡带、斜垒带、外斜坡,加上凹陷两侧的隆起带共7个构造单元；平面上具有北东成带,北西(南北)成隆(凹)的棋盘式构造格局,发育祝庄—草舍—红庄、边城—帅垛—兴圩和茅山—史家堡—殷庄三条主要断层带,港口—南华、祝庄—边城、草舍—史家堡、红庄—台兴4个构造高带；3、凹陷主要发育伸展、伸展-走滑两种主要构造样式类型,并可细分为7个亚类,构造样式平面上表现为西部强走滑弱拉张、东部弱走滑强拉张的差异性,纵向上表现为下部地层伸展强走滑弱,上部地层走滑强伸展弱的特点；构造圈闭主要有滚动背斜、断鼻和断块三种类型；通过构造发育史研究表明,溱潼凹陷新生界地层经历了坳陷-断陷-坳陷3个主要演化阶段；4、通过油气成藏条件综合分析,明确了溱潼凹陷油气成藏主控因素：①有效烃源岩的埋深和体积控制了油气平面分布；②良好的构造背景是油气富集成藏的主要场所；③储层发育程度控制了油气成藏及富集程度。最终通过油气地质条件综合评价在阜三段发现了2个有利的构造带、戴南组发现1个有利构造带。更多还原

【Abstract】 Qintong sag which is in the Northen Jiangsu Basin is one of the most oil-rich sags. Previous exploration and research only find out the local the fault-blocks, not structure interpretation and mapping systematically in the whole Basin Qintong. So we are in lack of the knowledge of the structural characteristics and hydrocarbon accumulation patterns in the area.In response to these problems, this paper made a more systematic study about district of the Qintong sag in Subei Basin and got following main results and understanding about by means of the application of structural geology, geophysics, petroleum geology, multidisciplinary theories, techniques and methods of fault system, structural styles, tectonic evolution, reservoir characteristics and favorable exploration;1, By researching the synthetic seismograms of several wells in the study area and calibrating accurately 10 the reflective layers, layer group characteristics of the various wave seismic reflection layer group characteristics were defined eventually and completed seven Structural maps of motivated layer through using well-seismic techniques, combination with tops of the wells and seismic layer;2, Qintong sag can be divided into general seven structural units, fault-terrace belt, deep sag belt,slope, oblique belt, external slope, the uplift belt on both sides of the sag.in the aspect of plane to have a checkerboard pattern structure with a zone in the North East into a zone and uplift(sag) in the North Eest (North South), to develop three major fault zones in Zhuzhuang-Zaoshe-Zongzhuang, Ziancheng-Zhuaiduo-Zingyu, and Zaoshan-Zhijiabao-Yinzhuang and to form four tectonic high belts in Gangkou-Nanhua, Zhuzhuang-Biancheng, Caoshe-Shijiabao, Hongzhuang-Taixing;3, The sag mainly developed stretch, stretch-slip two main types of structural styles, and can be broken down into seven sub-classes, constructors western style plane showed weak tensile strength slip, slip Eastern weak tensile strength of differences, the performance of the lower strata longitudinal stretch strong slip weak, strong stretch upper stratum weak strike-slip characteristics; structural traps are rollover anticlines, fault nose and fault block of three types; through Structural evolution history studies show that Qintong Cenozoic strata experienced depression-fault-depression three major evolutionary stages;4, Through the comprehensive analysis of hydrocarbon accumulation conditions, we has been clear about the main controlling factors of hydrocarbon accumulation in Qintong sag:① depth and volume of effective hydrocarbon source rocks control plane distribution of oil and gas;② good structural background is the main place to oil and gas reservoir rich integration; ③ the degree of reservoir development control the oil and gas accumulation and enrichment degree, finally through the comprehensive evaluation of oil and gas geological conditions, we found two favorable structural zones in the third member of Funing Formation,one favorable structural zone in Dainan Formation.更多还原