特低渗透油藏水平井开发参数优化  

The development parameter optimization of the horizontal well in ultra-low permeability reservoirs

作　　者：王成龙 刘姣[2] 周雪 谭虹 WANG Chenglong;LIU Jiao;ZHOU Xue;TAN Hong(Zhidan Oil Production in Yanchang Oilfield Co., Ltd., Shaanxi Yan’an 717500,China;Exploration and Development Technology Research Center of Yanchang Oilfield Co. , Ltd. , Shaanxi Yan’an 717500,China)

机构地区：[1]延长油田股份有限公司志丹采油厂,陕西延安717500 [2]延长油田股份有限公司勘探开发技术研究中心,陕西延安717500

出　　处：《非常规油气》2022年第1期84-89,共6页Unconventional Oil & Gas

基　　金：延长石油集团公司2018年科技计划项目“志丹采油厂水平井开发技术参数优化研究”(ycsy2018ky-C-3-3)。

摘　　要：为了提高特低渗透油藏水平井的开发效果,针对志丹油田长6油藏的地质特征和水平井开发过程中出现的问题,开展了水平井开发技术和开发参数等研究工作,利用数值模拟优化研究得到如下认识1)水平段长度与初产、现产、累产有比较明显的正相关性,但当水平段长度大于1000 m时累产油增幅明显减小,综合考虑钻井和压裂成本,最优水平段长度为1000 m。2)推荐采用五点法井网同步注水,易于调整,可以有效控制含水上升,能达到较好的采油效果。最优井距为500~600 m,最优排距为100~150 m。建议初期配注15~20 m^(3)/d,注采比维持在约2.0。该成果认识对特低渗透油藏的水平井开发具有一定指导意义。In order to improve the development effect of horizontal well in ultra-low permeability reservoir,based on the Chang6 geological characteristics in Zhidan Oilfield and the problems that arise during the development of horizontal wells.In this paper,the development technology and development parameters of horizontal well are studied.Using the numerical simulation optimization research,it can obtain the following understanding:1)The length of horizontal section has obvious positive correlation with the initial yield,current yield and accumulated yield.However,when the length of horizontal section is greater than 1000 m,the increase of cumulative oil production decreases obviously.Taking into account drilling and fracturing costs,the optimal horizontal section length is 1000 m.2)The five-spot well pattern by simultaneous water injection is recommended.The optimal well spacing range is 500 m to 600 m and the optimal row spacing range is 100 m to 150 m.The initial injection allocation is suggested to be 15 m^(3)/d to 20 m^(3)/d,and the injection-production ratio should be maintained at about 2.0.This understanding has certain guiding significance for the efficient development of horizontal wells in ultra-low permeability reservoirs.

关 键 词：特低渗透 水平井开发 井网形式 井距排距 注水参数 

分 类 号：TE348[石油与天然气工程—油气田开发工程]