多层非均质反韵律稠油油藏水驱界限实验研究  

Lab research on the boundary of water driving in multilayer heterogeneity heavy oil reservoir

作　　者：刘斌 喻秋兰 宫平志 邓景夫 

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452

出　　处：《石油化工应用》2016年第6期57-60,共4页Petrochemical Industry Application

摘　　要：渤海某油田为反韵律油藏,层内纵向非均质性严重,渗透率级差大,正确判断水驱界限能够有效避免注入水的无效循环,对后期调整措施具有重要的指导意义。本文根据该油田地质油藏特征,利用人造物理模型制作技术制作内置微电极物理模型,并进行水驱油实验,从而明确纵向非均质性对剩余油分布规律的影响,确定水驱界限。研究结果表明:渗透率级差越大,其非均质性越严重,采出程度越低,而含水上升越快,高渗层驱油效率越高,低渗层驱油效率则越低;在合注分采过程中,注入水绝大部分都涌入高渗层,而中、低渗层的水驱动用情况很差;由于层间矛盾,中、高渗层的绝大部分可动油是在注入孔隙体积1 PV前采出的,大于1 PV以后的注入水对提高采收率幅度的影响相对较小;剩余油主要分布在低渗层段,渗透率级差越大,低渗层驱油效率越低,剩余油分布的比例越大。A Bohai oilfield is anti-rhythm reservoir, serious layer in vertical heterogeneity,large permeability contrast, correct judgment of the boundary of water driving can effectively avoid invalid injected water circulation and for later adjustment measures have important guiding significance. According to the geological characteristics of heterogeneous reservoir,we make two-dimensional physical model using artificial physical model technology. We do experiments of water flooding, so as to clear the longitudinal heterogeneity influence on residual oil distribution law and the boundary of water driving. Experimental results show,the greater the permeability contrast, its heterogeneity is serious, the lower the recovery degree, and the faster the water cut rising, the higher the oil displacement efficiency of high permeability layer, low permeability layer oil displacement efficiency is lower, during multilayer co-injection and separated layer production, the most part injected water into high permeability layers, while the medium and low permeability layers of water drive very poor condition, because of the interlayer contradiction, medium and high permeability layer for the most part of movable oil is produced before the injection pore volume 1 PV, greater than 1 PV af-ter the injection of water in a relatively small effect on the increase in the amplitude of the recovery. Residual oil is mainly distributed in the low permeability layer section, the greater the differential permeability, low permeability layer oil displacement efficiency is lower, the greater the proportion of remaining oil distribution.

关 键 词：油水前缘检测 层内纵向非均质 渗透率级差 水驱油 注入倍数 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]