delta facies

Sandstones of shallow water delta facies are the material base for the formation of these tight reservoirs.

The main sedimentary facies are continental shelf facies, delta facies, rift volcanic facies in Himalayan region.

The reconstructed palaeogeographic map shows that lake facies in the center, surrounded by fluvial rivers and braided delta facies.

The research showed the sedimentary facies types include lacustrine, fan-delta facies and braided river delta facies.

delta facies and flood plain facies mainly developed during the depression period of Dongying stage.

Penglaizhen formation in Qionglai-Pujiang County of west Sichuan mainly belongs to lacustrine delta facies.

The third, forth and fifth formations is shadow lake- deltaic depositional system, mainly develop shadow lake delta facies.

Sedimentary type of Fu Yang oil layer is fluvial facies and delta facies in Xingshugang oil field of Song-Liao Basin.

The upper Es^3 is dominated by braided river delta facies, of which the delta front subfacies is the most extensive.

Recognition and Correlation of Two Distinct Types of Fan Delta Facies

Reservoir feature of the delta facies in the second member of Shahejie formation, Shengtuo Oilfield and its influencing factors

The Triassic fan delta facies and the alluvial fan facies are favorable reservoir blocks in this region;

the delta facies belt on the south margin of the catchment area , including 3 deltas from the south provenance;

the delta facies belt on the north margin of the catchment area , including 4-5 deltas from the north provenance;