Research On Micro-structural Characteristics Of Shasan Formation Of Shen84-an12 Block

In this thesis, we used well seismic methods and high-resolution sequence stratigraphy theory as a guide to learn the Shen 84 - An 12 regions Shasan formation, got a precise classification and correlation at last. We divided the region into four sub-paragraph , 12 oil group , 93 small layer , 146 single sand body .Basing on the combination of seismic and well logging , static and dynamic method,we do a fine interpretation to the entire region structure,finally identified 18 faults in the area,and leared that these faults are all normal faults formed under the extension and slippery background. These Containes 5 border faults, with the exception of the border fault, developed the NEE - near east-west, North West and Northeast three groups of 13 faults inside , these faults divided the whole region into 18 micro-blocks. We did Statistics to the type of micro-structure and production capacity of different types on the base of the S33, and discussed the type of micro-structure and its causes,studied the relationship between micro-structure and oil and gas accumulation, and the oil saturation of original single-well ,how the micro-structure controled the oil well production; and the relationship between micro-structure and residual oil, as well as how did these different types of micro-structure influence the remaining oil.The type of micro-structure is divided into positive micro-structure, negative micro-structure, monoclinic micro-structure, of which beneficial to accumulate oil and gas is positive micro-structure , unbeneficia to the enrichment of oil and gas is negative micro-structure, the function between above both to the enrichment of oil and gas is monoclinic micro-structure. Above this foundation ,...