下寺湾油田川道区储层四性关系及有效厚度下限研究

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14 Ω·m,声波时差为237μs/m.

Research on Four-property Relationship and Lower Limit of Effective Thickness Of Chang2 Reservoir in Chuandao Area,Xiasiwan Oilfield

In order to enhance the accuracy of well logging interpretation of target layer reservoirs and favourable region prediction,combined with logging information,four property relationship of Chang2 reservoir in Chuandao area was studied by using technical means of sandstone thin slice,casting sheet and scanning electron microscope.The results show that Chang2 reservoir is typical medium-porosity and low-permeability oil layer;the reservoir lithology is dominated by moderate,moderate-fine grain arkosic sandstone;the reservoir space is composed of intergranular pores and dissolving pores;the low limit standard of physical property is determined as follows: porosity is 12.0%,permeability is 0.40×10-3μm2,resistivity of the low limit of electric property is 14.m,acoustic interval transit-time is 237 μs/m.