Study On Formation Conditions And Enrichment Regularity Of Shale Oil On The Second Member Of Funing Formation In Yancheng Sag

Based on core observed?analysis and test?well logging and mud logging data analysis,we discussed the formation conditions of shale oil on the second member of Funing Formation in Yancheng Sag from source nature?lithology?reservoir property?brittleness and so on.Based on oil shows and analysis of typical oil well,combined with discovered shale oil characteristic at abroad and home,we analyse the enrichment regularity and main control factors of shale oil on the second member of Funing Formation in Yancheng Sag.We chose the advantageous area and advantageous layer for shale oil prospecting.The study considers that:(1)The second member shale of Funing Formation in Yancheng Sag,is characterized by high abundance and better types of organic matter?developed micro crack and micro pore?high brittleness,has appropriate formation conditions of shale oil.(2)Shale oil shows frequently.On the plane,shale oil shows mainly spread in deep sag areas in Nanyang sub-sag,in vertical shale oil shows mainly spread at subsections of fourth member and third member.(3)The enrichment of shale oil concerns to high TOC content?the type of litho faces?organic matter maturity?development level of fractures?higher abnormal pressure?etc,and is controled by these factors.(4)The final evaluation showed that,the favorable area of shale oil prospecting on the second member of Funing Formation is deep sag areas and inner slope in Nanyang sub-sag;In vertical,the subsection of fourth member is the most favorable layer for shale oil prospecting.