【作者】 周灿灿；

【导师】 陈广浩； 范宜仁；

【作者基本信息】 中国科学院研究生院（广州地球化学研究所） ， 构造地质学， 2003， 博士

【摘要】 本文首次在柏各庄地区采用具有特色的多学科新技术综合应用分析的方法，在大量岩芯裂缝精细描述基础上，结合成像测井和地层倾角测井新技术，以及利用常规测井技术提供的裂缝识别资料，地震属性参数、三维数据相干分析检测裂缝的资料和有限元数值模拟裂缝预测的资料，相互佐证，对柏各庄地区侏罗系砂岩构造裂缝进行了定性、定量研究。同时，用三维地震资料进行区域构造解释分析，论述了柏各庄地区的构造样式，是中新生代渤海湾裂谷盆地的Ⅱ幕断陷发育阶段，同时由于盆地内凸起边界—柏各庄断层的走滑兼伸展作用，使柏各庄凸起的中生界形成垒、堑断块群构造样式，发育一系列NE（NEE）向，倾向NW或SW的正断层。正是垒块上古潜山内幕主要断层形成过程中的局部构造应力场，控制形成了柏各庄地区潜山中生界砂泥岩中裂缝的发育。 研究认为柏各庄地区中生界侏罗系潜山砂岩储层中发育三组裂缝，以NE（NEE）向这一组为主。裂缝主要是张剪性的高角度裂缝，50％以上裂缝为有效缝，且普遍含油；裂缝是中生界砂岩储层中主要的渗流通道；裂缝的宏观和微观渗透率分别为25～50×10^-3μm²、15.75×10^-3μm²，孔隙度为0.24％、1.9％。裂缝在砂、泥岩中均发育，但主要切割同一岩层。不同组系的构造缝纵向上呈阶梯连通，形成空间裂缝网络，极大地改善了侏罗系砂岩储层的渗流能力，使其成为较好的裂缝—孔隙型储层。 本文应用测井参数的BP神经网络裂缝综合识别方法、三维地震裂缝检测技术，预测了柏各庄地区中生界储层平面或纵向上裂缝的发育分布及规律；并用有限元法数值模拟技术展示出不同主力油层的平面古应力状态，为研究裂缝的平面分布规律提供了理论依据；在此基础上，依据岩石破裂准则进行了构造裂缝定量预测。几种技术方法预测的裂缝分布状况与钻孔实际资料吻合较好。根据裂缝的各类参考数据，认为研究区中生界潜山油藏为裂缝—孔隙型双重介质油藏，进而对该区的油气藏进行了预测。更多还原

【Abstract】 For the first time, the special integrated applications of multi-disciplines and new technologies are used to study the structure fracture of Jurassic sandstone of Baigezhuang region in the dissertation. On the basis of abundant fine descriptions of core, the imaging and dip data, the identification informations of fracture with conventional logs, the parameters of seismic attribute, the detected data of fracture with correlative analyses of 3D and the prediction data of the finite element numerical simulation of fracture are inter-testified to qualitatively and quantitatively determine the structure fracture of this area. The regional structure interpretation with 3D seismic data shows that the graben and shied mode faults of the Baigezhuang, which developed a series of normal faults which stroked in NE(NEE) and dipped NW or NW, came into being in the rift development stage of II Act of the Bohai bay rift basin in Mesozoic and Cenozoic and resulted from the protrudent boundary of the basin, i.e. the strike-slip and stretch processes of Baigezhuang fault. It is the regional structure stress field formed in the processes of formation of the major faults of buried hills action on the graben that controlled the development of the fractures of sandstone of Mesozoic of Baigezhuang region.The studies show that the sandstone reservoirs of the buried hills of Jurassic in Baigezhuang region developed three groups of fractures, which most tend towards in NE(NEE). Most of the fractures are tension-shear high angle fractures, 50 percent of which are effected and bear oil. As the major percolation flow channels of sandstone reservoirs of Mesozoic, the macro and micro permeability of fracture are respective 25-50 10-3 m2 and 15.75 10-3 m2 and its porosities are 0.24% and 1.9%. Although the fractures are developed in both sandstones and mudstones, they mainly cut the same formation. Different groups of fractures are vertically connected in ladder shape and form the fracture net, which improve the permeability of the formations and makes the formations good fracture-pore style reservoirs. The integrated identification of fractures with the BPO interpretation of logs and the 3D seismic fracture interpretation technology were used to predict the development and distribution rules of fractures in vertical and plane directions of Mesozoic reservoirs of Baigezhuang region. The plane distribution of the stress fields of different major oil reservoirs determined with finite element numerical simulation provides a theoretical foundation for the research of the plane distribution of the fracture. Thus, the quantitative prediction of the tectonic fractures is possible. The actual prediction of the distribution of fractures with the several technologies mentioned above fits the data of the drilling nicely. On the basis of all kinds of fracture data, the characters of the buried hill reservoirs of Mesozoic are considered as fracture-pore dual mediums, and then the hydrocarbon reservoir was predicted.更多还原