直井水平井联合井网与剩余油分布的实验研究  

Experimental Study on Residual Oil Distribution of Combined Vertical Well and Horizontal Well Pattern

作　　者：王国栋 唐洪 罗宪波 侯建伟 张章 石健聪 WANG Guodong;TANG Hong;LUO Xianbo;HOU Jianwei;ZHANG Zhang;SHI Jiancong(Tianjin Branch of CNOOC Ltd.,Tianjin 300452,China;College of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452 [2]西南石油大学地球科学与技术学院,成都610500

出　　处：《重庆科技学院学报（自然科学版）》2021年第1期19-25,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001);油气藏地质及开发工程国家重点实验室项目“基于曲流河点砂坝构型的水驱油物理模拟实验”(PLN1521)。

摘　　要：直井与水平井的联合井网是油田水平井开发模式之一。采用联合井网开发,存在水驱不均匀、驱油效率较低而剩余油分布不清等问题。根据相似性原理,设计制作不同渗透率级差的储层水驱实验平板模型,模拟渤海湾盆地某油藏的地质条件和联合井网模式,进行水驱油模拟实验。实验结果显示,与均质储层相比,非均质储层见水较早,但其最终采出程度和平均驱油效率较高。在渗透率级差为1和4的储层中,剩余油主要分布在水平井跟部和趾部附近;非均质储层中剩余油的分布范围更广,位于低渗区的剩余油更多。在渗透率级差为6的储层中,剩余油主要分布于低渗透区和中渗区邻近水平井区域。联合井网更适合于渗透率级差较大、平均渗透率较低的非均质储层。The combined well pattern of vertical wells and horizontal wells is one of the development modes of horizontal wells in oil fields. The use of joint well pattern development has problems such as uneven water flooding,low oil displacement efficiency and unclear remaining oil distribution. According to the principle of similarity,the experimental flat model of water drive for reservoirs with different permeability is designed and produced to simulate the geological conditions and joint well pattern of a certain oil reservoir in Bohai Bay Basin,and water drive simulation experiments are carried out. Experimental results show that,compared with homogeneous reservoirs,heterogeneous reservoirs have an earlier water breakthrough,but their final recovery degree and average oil displacement efficiency are higher. In reservoirs with very poor permeability of 1 and 4,the remaining oil is mainly distributed near the heel and toe of horizontal wells;the remaining oil in heterogeneous reservoirs has a wider distribution range,and the remaining oil in the low-permeability zone is more extensive. In the reservoir with a permeability difference of 6,the remaining oil is mainly distributed in the low and medium permeability areas adjacent to the horizontal wells. The combined well pattern is more suitable for heterogeneous reservoirs with extremely poor permeability and low average permeability.

关 键 词：剩余油分布 水平井 联合井网 水驱 物理模拟实验 渗透率 

分 类 号：TE328[石油与天然气工程—油气田开发工程]