西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (3): 167-170.DOI: 10.3863/j.issn.1000-2634.2008.03.043

• 探讨与争鸣 • 上一篇    

启动压力其实并不存在

李传亮1 杨永全2   

  1. 1.“油气藏地质及开发工程”国家重点实验室·西南石油大学,四川 成都 610500; 2.中国石油塔里木油田公司轮南作业区,新疆 库尔勒 841000
  • 收稿日期:2008-01-20 修回日期:1900-01-01 出版日期:2008-06-20 发布日期:2008-06-20

THERE IS NOT A STARTING PRESSURE GRADIENT IN LOWPERMEABILITY RESERVOIRS AT ALL

LI Chuanliang1,YANG Yongquan2   

  1. 1.The State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation ·Southwest Petroleum University,Chengdu Sichuan 610500,China;2.PetroChina Tarim Oilfield Company,Korla,Xingjiang 841000,China
  • Received:2008-01-20 Revised:1900-01-01 Online:2008-06-20 Published:2008-06-20

摘要: 低渗透储层存在许多研究误区,启动压力梯度便是其一。低渗透储层孔隙欠发育,渗透率低,产能也较低,压力在其中的传播速度较慢,施以压力梯度之后,产量的响应需要较长时间。实验过程将微弱的流量误认为是0,因而导致了启动压力梯度的实验假象。实测的启动压力梯度数值太高,对油气生产没有任何指导意义。中高渗透储层没有启动压力梯度,低渗透储层也不应该有。固体和流体都不存在启动压力,油气也不可能存在。

关键词: 油气藏, 岩石, 低渗透, 压力梯度, 启动压力梯度

Abstract: There are many misunderstandings of lowpermeability reservoirs,one of which is the starting pressure gradient for fluids to flow through.Pores are underdeveloped in lowpermeability reservoirs,so permeability and productivity of lowpermeability reservoirs are quite low,and pressure transits at quite low speed.While a pressure gradient is established in lowpermeability reservoirs,the response of production needs a long time period.The weak flow rate from experiment in laboratory is misunderstood as zero,which results in the socalled"starting pressure gradient"phenomenon.The measured starting pressure gradients are usually too high to instruct the oil/gas production of lowpermeability reservoirs.There are not starting pressure gradients for midand highpermeability reservoirs,so not for lowpermeability reservoirs.There are not yielding shearing stresses for solids and liquids,so not for oil and gas.

Key words: reservoir, rock, lowpermeability, pressure gradient, starting pressure gradient

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