【摘要】 随着准噶尔盆地腹部及准东地区勘探程度不断提高,勘探对象也变得复杂,已往古凸起上的断块和低幅度背斜为主的勘探目标变得越来越少,勘探目标转向斜坡区和深凹陷的岩性油气藏成为必然趋势,此类油气藏的主要特点是:圈闭幅度较低,砂层厚度较小,横向变化快,地震识别、落实评价困难.本文针对地质难点,以准噶尔盆地准东阜11井区岩性油气藏为研究对象,逐步形成准噶尔盆地岩性油气藏勘探方法、应用效果体系;在具体工作中利用地质、地震、测井相结合的综合研究方法,分析了准东阜11井区岩性油气藏特征,建立了岩性油气藏勘探理论和方法,开发和自研出了一套适合准噶尔盆地碎屑岩岩性圈闭识别与评价的技术系列,主要包括精细的井震标定技术、精细的全三维自动追踪技术、断裂识别技术、动态构造演化分析技术、沉积微相分析技术、储层预测技术、流体预测技术及有利目标区块选择评价技术;利用此技术系列对准东地区阜11井区侏罗系三工河组(J1s)发育的岩性圈闭进行了综合预测,识别了三个可供钻探的断层-岩性圈闭,其沉积微相为扇三角洲前缘的席状砂,圈闭面积在1.75km2～6.1km2之间,砂岩厚度在10m～25m之间,油气检测处于有利位置,累计圈闭面积达12.39km2,从而扩大了该区岩性圈闭识别的数量和精度,为岩性油气藏的勘探、开发提供了有力的技术支撑.更多还原

【Abstract】 With the continuous improvement in exploration in hinterland and east of Junggar basin,it is more difficult to find the phenotype structure trap.In the situation of exploration targets having become more complicated,the oil and gas exploration transform from the structural reservoir exploration to the lithologic reservoir exploration,for the previous exploration targets based on fault block in the ancient uplift and low-amplitude anticline are becoming ever less,it is an inevitable trend of exploration targets turning to lithologic reservoirs on the slope and deep depression.The characteristics of this kind of oil and gas reservoirs are low amplitude of traps,small thickness of sand layer,rapid change in horizontal and difficult to distinguish and evaluate for seismic data.However,for the geological difficulties,we taking the lithologic reservoir of well Fu11 block in eastern Junggar Basin for the research object,combining geological,seismic and logging to analyse the lithologic reservoir characteristics of well Fu11 area,study the exploration theories,methods and the effectiveness for lithologic reservoir of this area.Then,we select many kinds of targeted geophysical technology and develop a series of technologies to identify and evaluate the clastic rock lithologic traps for Junggar basin,which include the technology of proper calibration by well and sesimic data,automatic tracking with full 3-D,fracture automatic detection,analysis of dynamic evolution of structure,analysis of sedimentary microfacies,reservoir prediction,and detection of fluid and evaluation the favorable goal.Finally,applying these technologies to predict lithologic traps of Sangonghe formation(J1s) in FU11 well area in eastern Junggar basin,eventually we found three traps of lithologic and fault-lithologic which can be drilled.The sedimentary microfacie of these traps is the sand of mat shape in front of delta,trap area between 1.75 km2 and 6.1 km2,and the thickness of sand is about 25m to 35m.It is the most important that these traps are all located in the favorable positions by hydrocarbon detection.The total areas of these traps is 12.39 km2.And then,we evaluate and select a number of wells in these favorable lithologic traps.As it has been proved that these technologies is effective and practical by real drilling,it improves the quantity and precision of lithologic traps identification and provides a powerful technical support for lithologic reservoir exploration and development.更多还原