【作者】 苏璇；

【导师】 程远方； 张家义；

【作者基本信息】 中国石油大学 ， 石油与天然气工程， 2011， 硕士

【摘要】 与碎屑岩油藏不同,裂缝性油藏是以碳酸盐为主要岩石类型,孔隙-裂缝纵横交错、种类繁多,其储层独特的储集空间结构和渗流特性具有非均质性强、各向异性强的特点,给常规的勘探、测井评价来来困难。本文针对冀东油田南堡潜山碳酸盐岩油藏的储层物性和渗流特性,以及在开发过程中可能面临的储层损害和保护问题,进行岩石物理性质及矿物分析,敏感性分析,利用扫描电镜、计算机层析等技术,分析储层的微观裂缝特征。通过对缝长、缝宽、开启度等指标的定量分析,对微观裂缝的导流和储集能力做出了评价。对手标本进行初步观察记录,并通过扫描电镜手段,观察孔隙、微裂缝等微观构造,分析了61个代表性样本,孔隙常分布于晶间、粒间,常见微孔径为1-4μm。X射线衍射分析中,储层岩石主要为灰岩,矿物成分以方解石为主,偶见粘土夹层,灰岩、砂岩和泥岩的比例分别为66.7%、20%和13.3%。润湿角测量结果显示,润湿性均为水湿。分析相对渗透率曲线特征:S_wi >30%,非湿相（油相）渗透率下降趋势较快,水相在低饱和度情况下上升较快;K_rw= Kro=0.089时,两相流互相干扰严重;K_rw= 0.238,油滴对水流的影响较大。敏感性评价显示,岩心有效应力损害程度强,水敏性弱,未见速敏、酸敏。更多还原

【Abstract】 Different from clastic reservoir, the main types of fractured reservoir is Carbonate rocks. Complicated and various pore-fracture structures lead to unique reserve space and permeable characteristics. The logging interpretation and exploration evaluation of fractured reservoir is more difficulty than that of conventional homogeneous porous reservoir because of that it has more complex structure of pore and stronger anisotropy.To evaluate physical property and permeability of carbonate reservoir in Jidong oilfield, methods of XRD, sensibility evaluation, SEM and CT analysis, which can avoid reservoir damage and protect reservoir, was established. With quantitative consideration certain factors, i.e., length of crack, width of crack, opening of crack, evaluate the fracture conductivity and ability of reserve.Based on analysis of the pore-fracture construction of 61 core samples, the results of SEM shows that, pore usually distribute among grain substance or particle substance and common diameter of micro crack is 1-4μm. XRD result shows that main stone type is limestone, mineral composition is calcite and little clay. Content ratio of limestone, sandstone, shale is 66.7%,20% and 13.3% respectively. Contact angle measurement result displays, wettability is water wet. Characteristic analyse of relative permeability curve: S_wi >30%, relative permeability of oil decline speedy,relative permeability of water rise quickly with low saturation level. When Krw= Kro=0.089, oil-water seepage disturbs critically. When K_rw= 0.238, oil drop affect water seriously. Sensibility evaluation displays,the core with intense sensibility to stress path, weak water sensitivity, without flow rate sensitivity and acid sensitivity.更多还原