P油田注水开发物性变化规律分析  

Analysis of Physical Property Change Law of Injection Development in P Oilfield

作　　者：靳心伟 张伟 赵靖康 王巍 蒋曙鸿 JIN Xinwei;ZHANG Wei;ZHAO Jingkang;WANG Wei;JIANG Shuhong(CNOOC Limited,Beijing 100010,China;CNOOC(China)Limited,Tianjin Branch,Tianjin 300452,China;CNOOC Research Institute Ltd.,Beijing 100028,China)

机构地区：[1]中国海洋石油有限公司,北京100010 [2]中海石油(中国)有限公司天津分公司,天津300452 [3]中海油研究总院有限责任公司,北京100028

出　　处：《海洋石油》2024年第4期50-56,共7页Offshore Oil

基　　金：国家重大科技专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)。

摘　　要：为深入分析多层砂岩油田经长期注水开发后,表现出的复杂物性变化,该文采用填砂管核磁在线水驱油方式,在高倍水驱的同时进行核磁检测,观察长期水驱储层微观孔隙结构和物性变化情况。研究表明,由于储层粉砂岩、泥质等微粒含量不同,在注水开发过程中呈现不同的孔隙度、渗透率变化规律。其中Ⅰ类储层粉砂岩和泥质含量低,注水冲刷后因微粒运移导致储层孔隙度、渗透率逐渐变大;Ⅲ、Ⅳ类储层粉砂岩和泥质含量较高,注水后因黏土膨胀导致孔隙度和渗透率逐渐减小;Ⅱ类储层介于二者之间,孔隙度、渗透率变化不大,可指导油田不同储层水驱开发效果合理预测。In order to deeply analyze the complex physical property changes exhibited by multi-layer sandstone oil fields after long-term water injection development,this paper adopts the sand filled tube nuclear magnetic online water flooding method,and conducts nuclear magnetic detection while high magnification water flooding to observe the micro-pore structure and physical property changes of long-term water flooding reservoirs.Research has shown that due to the significant differences in the content of fine particles such as siltstone and mud in different reservoirs,there are different patterns of porosity and permeability changes during water injection development.Among them,Class I reservoirs have low content of siltstone and mud,and the migration of particles after water injection flushing gradually increases the porosity and permeability of the reservoir.Class III and IV reservoirs have high content of siltstone and mud,and the expansion of clay after water injection leads to a gradual decrease in porosity and permeability.Class II reservoirs are between the two reservoirs above,with little change in porosity and permeability,which can guide the reasonable prediction of water drive development effects in different reservoirs of oil fields.

关 键 词：注水开发 水驱实验 微观结构 物性变化 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]