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通过对大庆头台地区扶余油层描述研究入手，特别指出了除显裂缝之外的微裂缝系统，它对提高储层岩石的渗流能力，提高特低渗透油藏的开发效果有着十分重要意义。本文首先描述特低渗透储层的岩块及显裂缝系统及其特征，指出显裂缝系统大致由四组裂缝组成，长度大于2cm，渗流能力很强，约为岩块系统的1100倍；岩块系统包括基质和微缝部分，微缝一般长度小于2cm，规模小，包括岩块之内。微缝和岩块基质的储渗条件差别很大，微裂缝的渗流能力是基质渗流能力的83倍。其次描述了特低渗透储层做裂缝发育特征，指出微缝呈条带性分布，并且微缝间呈平行或雁式排列，具有明显的方向性，条带性随着岩性的变化而变化。微缝又可划分为有效缝和无效缝，有效缝对渗流起作用，无效缝充填方解石，对渗流不起作用。第三论述了特低渗透储层做裂缝对注水开发效果的影响，指出在线状注水排距210m条件下，微缝发育区适合于线状注水，注水后压力比较低，油井产量相对较高。总之，本研究对特低渗透储层评价研究及经济有效投入开发具有重要指导意义，开拓了一个新的领域。
Based on the description of the Fuyu reservoir in the Toutai region of Daqing, it is pointed out that the microcracking system except for the obvious fractures is very important for improving the seepage ability of reservoir rocks and enhancing the development effect of ultra-low permeability reservoirs. In this paper, we first describe the rock mass and the apparent fracture system and its characteristics in the ultra-low permeability reservoir. We point out that the fracture system consists of four groups of fractures with a length of more than 2 cm and a strong seepage capacity of about 1100 times that of the rock mass system. The system includes the matrix and the micro-slit section. The micro-slit is usually less than 2cm in length and small in size, including within the rock mass. Microsegregation and rock matrix storage and seepage conditions vary greatly, the micro-fracture seepage capacity is 83 times the matrix seepage capacity. Secondly, it describes the characteristics of fractures in the ultra-low permeability reservoir, points out that the micro-cracks are strip-like distribution, and the micro-cracks are arranged in parallel or geese with obvious directionality, and the stripiness changes with lithology . Micro-slit and can be divided into effective and effective joints and seams, the effective seam on the seepage, invalid seam fill calcite, on the seepage does not work. The third discusses the effect of fractures on the waterflooding effect of ultra-low permeability reservoirs. It is pointed out that under the condition of 210m linear waterflooding distance, the micro-seam development zone is suitable for linear waterflooding, and the pressure ratio after waterflooding is relatively low, and the oil well production is relatively high. In conclusion, this study has important guiding significance for the evaluation of ultra-low permeability reservoirs and economic and effective investment and development, opening up a new field.