Oil and Gas Accumulation Characteristics in Actic Region of Jiyang Depression

Based on tectonic style and sedimentary characteristics, there are four types of structures in actic region of Jiyang Depression:apron style, spade style, terrace style and slope-flat style. In terrace type and slope-flat type structures, there are many glutenite fan types, advantageous accumulating condition, various reservoir types and entire reservoir series in vertical. Glutenite fan body of apron and spade type structures was mainly inshore subsea apron, and then fan delta, which have single reservoir type and imperfect reservoir array in vertical. Moreover, oil and gas of apron actic region is poor because of undeveloped faults and narrow sedimentary facies belt. Oil accumulated more in terrace style than flat style and slope-flat style.