高倾角油藏气顶重力驱技术研究及应用  

Research and application of gas-cap gravity flooding technology in highinclination reservoirs

作　　者：盖长城[1] 王淼[1] 张雪娜 乔石石 毕永斌[1] GAI Changcheng;WANG Miao;ZHANG Xuena;QIAO Shishi;BI Yongbin(PetroChina Jidong Oilfield Company,Tangshan 063004,China;CNOOC Oilfield Services Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中国石油冀东油田公司,河北唐山063004 [2]中海油田服务股份有限公司,天津300452

出　　处：《复杂油气藏》2022年第4期71-75,共5页Complex Hydrocarbon Reservoirs

基　　金：国家科技重大专项“南堡凹陷油气富集规律与增储领域”(2016ZX05006-006)。

摘　　要：中国有相当一部分油气藏具有埋藏深、倾角大、油层厚等特点,这类油藏经过多年水驱开发,剩余油主要分布在油藏顶部和断层根部,难以有效动用。气顶重力驱技术充分利用油气重力差异原理及高倾角油藏的地质特征,能有效提高该类油藏开发效果。油气界面稳定是气顶重力驱实施成功的关键,从地质和开发两个方面研究了地层倾角、储层非均质性、纵向与水平渗透率比值、地下原油黏度、井网井型、注气速度和防气窜措施等因素对油气界面的影响规律。研究成果在柳赞北区断层根部应用,实践证明气顶重力驱技术具有气窜慢、有效期长、增油量大、气体利用率高的特点。A considerable portion of oil and gas reservoirs in China are characterized by deep burial,large dip angles,thick oil layers,etc.After years of water flooding development,the remaining oil is mainly distributed at the top of the reservoir and the root of the fault,which is difficult to be used effectively.The gas-cap gravity drive technology makes full use of the principle of oil and gas gravity difference and the geological characteristics of high inclination reservoirs,which can effectively improve the development effect of these reservoirs.The stability of the oil-gas interface is the key to the successful implementation of gas-cap gravity flooding.The influence of factors such as formation dip angle,reservoir heterogeneity,vertical-to-horizontal permeability ratio,underground crude oil viscosity,well pattern type,gas injection rate,and gas channeling prevention on the oil-gas interface,has been studied from geological and development aspects.The research results were applied in the fault root of the northern Liuzan area,which proved that the gas-cap gravity drive technology has characteristics of slow gas channeling,long validity period,large oil increase,and high gas utilization rate.

关 键 词：高倾角油藏 气顶重力驱 油气界面 技术政策 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]