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为提高目的层段油藏测井解释精度,利用砂岩薄片、铸体薄片和扫描电镜等技术手段,并结合测井资料对川道地区长2储层的“四性”关系进行研究。认为长2储层属于典型的中孔低渗油层;储层岩性主要为细粒、中-细粒长石砂岩;储集空间以粒间孔和溶蚀孔为主;并确定了储层物性下限的标准:孔隙度为12.0%,渗透率为0.40×10-3μm2,电性下限电阻率为14Ω.m,声波时差为237μs/m。
In order to improve logging interpretation accuracy of the reservoir in the target interval, the relationship between “four ” characters of Chang 2 reservoir in the Chuandao area was studied by means of sandstone flake, cast thin slice and scanning electron microscope. The Chang 2 reservoir is considered to be a typical low-permeability medium-porosity reservoir. The reservoir lithology is mainly composed of fine-grained, medium-fine feldspar sandstone. The reservoir space mainly consists of intergranular pores and dissolved pores. The reservoir physical properties The lower limit of the standard: the porosity of 12.0%, the permeability of 0.40 × 10-3μm2, the electrical resistivity of the lower limit of 14Ω.m, the acoustic time difference of 237μs / m.