【摘要】 为提高井网分布不均匀区域的储层反演精度,提出分区块定参数的方法。将位于松辽盆地北部三肇凹陷东北斜坡带的研究区分成三个井距均匀的小区块,分别采用平均值法、井网密度法、平均井距法三种统计学算法计算水平变程,并通过剖面和后验井分析验证。结果表明,三种算法得到的后验井符合率均在80%以上,其中平均井距法确定的变程更符合研究区。分区块定参数的方法能够有效提升井网分布不均匀区域的地质统计学反演精度。更多还原

【Abstract】 This paper proposes a method for determining parameters of a partition block, a method designed to improve the accuracy of reservoir inversion in the uneven distribution of well patterns. The research involves dividing the study of the northeast slope belt of the Sancha sag in the northern Songliao Basin into three blocks with uniform well spacing; calculating the horizontal range using the average method, the well pattern density method and the average well spacing method; and thereby performing verification by section and post-well analysis. The results show that the three algorithms could enable the coincidence rate of the post-test wells above 80% and the average well spacing method could offer the range better suited to the study area. The method of parameter setting in the partition block could enable an effective improvement in the geostatistical inversion accuracy of the uneven distribution of the well pattern.更多还原