Reservoir formations Gaotaizi of Longxi oil fields are mainly shaly siltstone with shale content 7.

龙西油田高台子油层岩性以含泥粉砂岩为主，泥质含量7。

Correction accuracy for clean sand and most of the shaly sand is less than 5% and 10% respectively.

纯砂岩的校正精度百分误差小于5%； 泥质砂岩校正误差绝大多数小于10%。

WaxmanSmits (WS) equation is an evolution of Acrhie equation for shaly sands, and it is a nonlinear equation.

方程是阿尔奇方程在泥质砂岩地层中的推广，W-S方程为非线性方程。

The former can be divided into granular and crystal grain limestone, while the latter includes clastic and shaly crystal dolomite.

研究认为，该区碳酸盐岩可划分为石灰岩和白云岩两大类。石灰岩可划分为颗粒灰岩和晶粒灰岩两类；

Oil bearing evaluation of low salinity water shaly sand reservoirs in the Liudong area is a difficult problem in log interpretation.

柳东地区低矿化度地层水储层的含油性评价是测井解释的一大难题。