摘要
钾盐主要分为可溶性钾盐、非可溶性钾盐和液态钾盐,油气勘探过程中工业价值较高的固态钾盐主要有钾石盐和光卤石。系统分析了常见钾盐矿物在测井曲线上的特征,利用常规测井组合进行钾盐找矿的主要对象为K2O视含量高的可溶性钾盐——钾石盐和光卤石。通过纯度判别公式计算钾盐层的含泥质情况,排除泥岩中K2O的干扰,得到纯钾盐的贡献。在利用测井组合识别钾盐矿物类型的基础上,建立了相应的体积物理模型,通过选择合适的测井曲线和参数建立矩阵以及对矩阵进行运算,得出地层中总的K2O视含量、各矿物的K2O视含量以及钾盐的K2O视含量。
Potassium included soluble potassium salt,insoluble potassium salt and liquid potassium salt.The solid potassium salt with high industrial value in oil and gas exploration mainly included sylviit and carnllite.The features of common potassium salt in the logs were systematically analyzed and the main object of potash exploration is the soluble sylviit and carnllite with high apparent content of K 2 O.The calculation of potassium purity could display how much argillaceous the rock salts contained,which could exclude the interference of K 2 O in mudstone and get the contribution that come from the pure potassium salt.The physical model is established on the basis of mineral types identified with logging combination.Then appropriate logs and parameters are chosen,the matrix is established and calculated.The total apparent content of K 2 O as well as the apparent content of K 2 O of various minerals and the apparent content of K 2 O of the potassium salt are obtained.
出处
《石油天然气学报》
CAS
CSCD
2012年第3期96-100,167,共5页
Journal of Oil and Gas Technology
基金
国家"973"规划项目(2011CB403002)
关键词
钾盐
测井组合
纯度
模型
K2O视含量
potassium salt
logging combination
purity
model
apparent content of K2O
