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库车坳陷东部下侏罗统阿合组是典型的致密储层,由于储层自身(特)低孔(特)低渗的物性特征,极易引发较强的敏感性。本文通过岩石薄片和扫描电镜的显微观察,结合X衍射测试分析和致密储层敏感性流动实验评价,从运移微粒的成因、含量和孔喉特征等角度,分析了研究区产生速敏效应的内在因素;结合速敏效应的实验评价,梳理引发研究层段速敏效应平面差异的主控因素,认为研究层段内广泛发育由刚性颗粒崩解而形成微小颗粒的含量以及孔喉大小和连通性好坏,是造成上述速敏效应平面差异的主控因素。通过对研究区速敏效应形成机理的具体分析和评价,为下一步的钻探和开采提供了切实可行的储层保护和改造建议。
The Lower Jurassic Yulin Formation in the eastern part of the Kuqa Depression is a typical tight reservoir. Due to the physical characteristics of the (special) low porosity (special) low permeability of the reservoir itself, it is highly susceptible to strong sensitivity. In this paper, through the microscopic observation of rock slices and scanning electron microscopy, combined with the X-ray diffraction analysis and the sensitive reservoir flow evaluation, the velocity-sensitive effect in the study area is analyzed from the perspectives of the origin, content and pore throat of the migrated particles. Combined with the experimental evaluation of the effect of speed-sensitive effect, combing the main control factors that cause the difference of speed-sensitive effect plane in the research interval, and considering that the content of fine particles formed by the disintegration of rigid particles and the size of pore throat and Connectivity is good or bad, is the main control factor that causes the above-mentioned speed-sensitive effect plane difference. Through the specific analysis and evaluation of the formation mechanism of the speed-sensitive effect in the study area, feasible suggestions for reservoir protection and reconstruction are provided for the next drilling and mining.