底水油藏水平井开发临界生产压差的确定  

Determination of Critical Producing Pressure Drop of Horizontal Well in Bottom Water Reservoir

作　　者：石飞 岳宝林 肖波 刘杰 杨志成 SHI Fei;YUE Baolin;XIAO Bo;LIU Jie;YANG Zhicheng(Bohai Oilfield Research Institute,Tianjin Branch of CNOOC Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452

出　　处：《重庆科技学院学报（自然科学版）》2021年第4期41-45,115,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：中海石油(中国)有限公司综合科研项目“渤海双高油田挖潜关键技术研究”(YXKY-2018-TJ-04)。

摘　　要：在底水油藏水平井开发中,生产压差通常会影响到底水的锥进速度,进而影响到油藏采收率。为了实现定量分析,从物质平衡原理和渗流力学理论出发,结合底水油藏程-范临界产量公式,综合考虑多个参数对临界生产压差的影响,推导出底水油藏水平井开发的临界生产压差计算公式。运用此公式对渤海X油田底水油藏水平开井发实况进行了分析,结果显示:底水油藏水平井开发的临界生产压差与油层有效厚度、水平段长度、水平段到油水界面的距离均成正相关关系,而与地层原油黏度、垂向渗透率系数成负相关关系。For the development of bottom water reservoirs for horizontal wells,producing pressure drop difference affects bottom water coning velocity and reservoir recovery.Based on the principle of material balance and the theory of seepage mechanics,combined with the formula of Cheng-Fan critical production of bottom-water reservoir,considering the influence of several parameters on the critical production differential pressure,the calculation formula of critical production differential pressure for horizontal well development in bottom water reservoir is derived.This formula is used to analyze the horizontal well development in bottom water reservoir of Bohai X oilfield.The research shows that the critical producing pressure drop of the horizontal well development in the bottom water reservoir is proportional to the effective thickness of the reservoir,the length of the horizontal section,and the distance from the horizontal section to the oil-water interface,and inversely proportional to the viscosity of formation crude oil,the ratio of vertical permeability to horizontal permeability.

关 键 词：底水油藏 水平井 临界生产压差 锥进 物质平衡 

分 类 号：TE355[石油与天然气工程—油气田开发工程]