杏子川地区油气藏形成条件分析

THE CONDITIONS FOR THE FORMING OF OIL POOL IN XINGZICHUAN AREA

通过对油气运移、生储盖组合、砂体特征、油气藏类型、成岩作用、油水分布等制约和影响油气藏形成因素的分析，探讨了杏子川地区三叠系延长组长；油层组油气藏形成条件。结果表明，本地区为油气运移的长期指向区，具有良好的生、储、盖组合条件，三角洲平原分流河道砂体成为本区主力含油砂体，复杂的成岩特征造就了本区以成岩圈闭油气藏类型为主，油气主要分布于砂体中部物性较好、成岩作用较弱的部位。

Based on the research of petroleum migration, association of source, reservoir and sealing rock, sandbody, types of oil pool, diagenesis, distribution of water and oil and other factors which affect the forming of oil pool, this paper analyses the forming condition of oil pools in No. 6 strata of Yanchang Formation in Xingzichuan area. The result shows that this area is one of the main directions for petroleum migration, it has better conditions of association of source, reservoir and sealing rock. The sandbody of delta channels is main reservoir and the lithological trap is main type of trap. Petroleum mainly located in the place where have the better reservoir properties and weak diagenesis.