文15块沙三上特高含水油藏剩余油分布

REMAINED OIL DISTRIBUTION OF UPPER $3 RESERVOIR WITH EXTRA-HIGH WATERCUT IN BLOCK WEN 15

针对文15块沙三上特高含水期油藏精细描述及调整挖潜工作，分析了油藏剩余油分布特点，利用统计分析地层混合液电阻率计算分析剩余油储量丰度平面分布，利用吸水剖面动用状况分析剩余油的剖面分布规律。阐述了该区剩余油分布主要受断裂、构造高、构造复杂带与层内河道边缘、相变带二、三类储层及其韵律性控制，以及层问干扰、注采不完善及水驱损失影响。指出该区特高含水油层动用程度高，剩余油分布总体比较零散，平面上主要以豆粒状、豆荚状或团块状、条带状分布富集；纵向上集中分布在部分动用相对较低主力油层中，油层动用不充分，呈现严重的非均质特征。

Considering the fine description, adjustment and tapping potential of extra-high water cut oil reservoir in Upper S3 of Block Wen 15, this paper analyzes the distribution features of remaining oil, calculates and analyzes the planar distribution of remaining oil abundance through the statistics and analyses of blended liquid resistance, and studies the distribution laws of remaining oil cross section by using water absorption developed conditions. The remaining oil in this region is mainly controlled by fractures, structural high, margins between complicated structure belts and interlayer fiver channels, type Ⅱ and Ⅲ reservoirs with changed facies and their rhythms, and furthermore it is influenced by interlayer interference, incomplete injection and production and water flooding. The development degree of extra-high water cut oil layers is pretty high; in general the remaining oil distribution is rather scattered, in horizontal it is enriched in the forms of bean particle, bean pod, lump and belt; in vertical it is mainly distributed in the key oil layers with lower and partial development. This incomplete development of these oil layers possesses the characteristic of serious heterogeneity.