Industrial flow was obtained from 35 wells in Shahejie Formation of Paleogene shale in Jiyang Depression.The lower Es

3

and upper Es

4

were the major producing layers producing mostly shale oil.Lab analyzing results as well as well testing and logging data were used to study the geological factors that controlled oil production rates. It shows that factors controlling the production are complicated and a wise picking of sweet spots shall be based on various geological eletments

among which high TOC content is the material base for shale oil and gas to accumulate

matruity of organic matter controlled quantity and phase of the oil and gas

lamillar muddy limestone and lime mudstone with high content of organic matter are perfect home for oil land gas to gather

abnormal high pressure affected accumulation and production of shale oil and gas

and the distribtuion of interlayers

fractures growth as well as fluid flowability controoled the flow rates attainable from local shale oil and gas accumulations.