利用微型圈闭法研究油田剩余油分布

在油田高含水期,微型圈闭控制了剩余油分布.在原始油藏边缘,微型断层圈闭、砂岩尖灭圈闭是剩余油富集区;在原始油藏范围内,单砂层顶面形成的微型圈闭条件与其底面构造形态、厚度相配合,控制了剩余油分布.其中顶底双凸型微型圈闭是剩余油富集区,而顶底双凹型区则不具备圈闭条件,剩余油远景差.并列举了应用实例,效果良好.

STUDY OF MINIATURE TRAP ON THE DISTRIBUTION OF RESIDUAL OIL

At the high water-saturation stage of an oilfield , the distribution of residual oil is controlled by the miniature traps of individual pay zones. On the edge of a primitive pool, the miniature fault and wedge-out traps have a high residual oil potential. Inside the primitive pool, the miniature trap formed on the upper surface of a pay zone, together with its lower surface structure and its thickness controls the distribution of residual oil. The miniature trap with convex upper and lower surfaces is the high potential 2one of residual oil. Both on the concave upper and lower surfaces was no trapping condition, and is a poor potential zone.