Comparing three VSH estimates in the first track: the Linear IGR index (dash red), Larionov (solid green) and Neutron-Density difference (dotted blue). Panel with different equations to estimate …

Shale volume (Vsh) estimation has been carried out on three selected reservoirs (Nan.1, Nan.2, and Nan.4) distributed across four wells (01, 03, 06, and 12) in Nantin Field, using …

Vshale (and not Vclay), is what is normally estimated in well logging. In a stratigraphic column —particularly in clastic environmets— it is common to find pure shales (100% VSH sediments).

确定Vsh 的方法： （1）自然伽玛法 Vsh‘= (GR-GRmin)/ (GRmax-GRmin) Vsh= (2^ (GcuR*Vsh')-1)/ ( (2^GcuR)-1) 式中，GRmin、GRmax分别是砂岩和 泥岩 层的自然 伽马值，GCUR是与地 …

Estimating the Shale Volume (VSHALE) from Gamma Ray (GR), remains the most popular standard technique to compute an initial curve of rock shaliness. However, the approach is far …

⑴首先划分渗透层；⑵再对储集层的物性（孔隙性、渗透性等）进行分析；⑶最后分段解释油气水层：在地层水电阻率基本相同的井段内，对地层的岩性、物性、含油性进行比较，然后逐层作 …

式中，N 、D 分别为目的层的中子和密度孔隙度。 式中， t 、 tma 、 tsh 分别是地层、骨架、泥质时差，微秒/英尺；Vsh -泥质含量，小 数。 2.3.2 利用中子测井确定的曾有小孔隙度. sh 、 f …

2010年11月29日 · 地层泥质含量（Vsh）计算公式 利用自然伽马（GR）测井资料 常用公式 minmax min GRGR GRGR SH ……………………..（1） 式中，SH－自然伽马相对值； GR－ …

2021年9月21日 · 用GR-Z 或Vsh 交会图来鉴别纯砂岩和泥岩点.在交会图（图3）上通过含水纯砂岩点 （S）并与水层点群相切的直线,可认为是代表纯砂岩线,其斜率应为m*,在Φt＝1.0

Both GRw and GRh are zero. GRi is equal to the background radiation in non-shaly rock and is called GR0 in this book. GRsh is the log reading in shale, called GR100 here. The effect of …