摘要
大庆某储层6种渗透率级别不同的岩心测试结果表明,特低渗透储层具有很强的应力敏感性和一定的启动压力梯度。应用油藏工程方法,综合考虑启动压力梯度、应力敏感性、原油脱气以及油、气、水三相同时存在时油相的相对渗流能力,推导出适合特低渗透储层的流入动态方程,对老区油井参数进行调整后,日产油可增加13.7%;对新区合理流压进行预测,得出该井初始合理流压值为5 MPa,且合理流压值随含水率增加而降低。结果表明该方法对老区油井参数调整以及新区投产合理流压控制具有重要的指导意义。
From test results of cores at six different Levels of permeability taken from a reservoir in Daqing,it is shown that ultralow permeability reservoir has very strong sensitivity to stress as well as a certain starling pressure gradient.Integrally taking into account of starting pressure gradient,stress sensitivity,crude degassing and the relative peculation capability of nil while oil,gas and water exist at the same time,an inflow performance equation suitable for ultra-low permeability reservoir is derived by use of reservoir engineering method.Upon adjustment of producer parameters in the mature area,daily oil production ean be increased by13.7%.From prediction of reasonable flowing pressure in a new area,the initial reasonable flowing pressure in the interest well is obtained as 5 MPa and the value tends 16 decrease as water cut rises.It is indicated from the results that this method provides important guidance for producer parameter adjustment in mature areas and control of reasonable flowing pressure for putting on steam in new areas.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第1期102-105,156,共4页
Special Oil & Gas Reservoirs
基金
国家自然科学基金重点项目"低渗透油层提高驱油效率的机理研究"(50634020)
关键词
特低渗透储层
合理流压
流入动态
启动压力
应力敏感
原油黏度
大庆外围
ultra-tow permeability reservoir
reasonable flowing pressure
inflow performance
starting pressure
stress sensitivity
crude viscosity
peripheral Daqing
