Technical Process

The first step, washing the oil

(Using chloroform extraction to remove oil and organic matter in sandstone samples)

The second step, pre-analysis (sample screening)

(The morphological characteristics of authigenic illite were observed by SEM, and the mineral composition of sandstone clay and the type and content of authigenic illite were determined by XRD)

The third step, coarse crushing

(cooling-heating cycle sample dissociation)

Refrigeration-heating cycle sandstone sample dissociation technology

Method principle:

Simulate the natural weathering process, through the freezing-heating automatic circulation technology, the sandstone samples are automatically dissociated by the principle of thermal expansion and cold contraction, so as to avoid the contamination of the detrital potassium-containing minerals caused by the excessive crushing of the detrital potassium-containing minerals by the wet grinding technology , so as to maximize the quality of separation and purification of authigenic illite.

Dissociation effect:

The fourth step, separation and purification of autogenic illite

(Preparation of clay suspension, sedimentation, siphon extraction, centrifugal separation, microporous membrane vacuum filtration)

Preparation of suspension (immersion + wet grinding)

The fifth step, the purity test of autogenous illite

(Use XRD technology to test the purity of the separated and extracted clay samples to determine the type and content of authigenic illite and whether it contains impurities such as detrital potassium feldspar and detrital illite)

The sixth step, determination of the age of autogenic illite

(Measure K, measure Ar, K-Ar age calculation, and send the K content to the National Geological Testing Center)