摘要
老油田人工注入水、边底水的锥进,水的“超前”流动等挤压了油流通道,严重影响油气井产能。含水率升高成为开发开采的主要矛盾,目前常用的控水技术往往主要关注于井筒内找水、堵水、卡水,是一种被动的控水方法,并且水平井的找水难度较大,精准堵水的难度更大,而且这种方法在低含水率阶段比较有效,到中高含水率阶段,有效期限会越来越短,常规压裂工艺可能压穿水层、增加压后高含水率的风险。为了解决这一问题,提出了“老油田精细分层控水压裂技术”。将钻时以及录井全烃相结合,形成了以一套海上低渗储层地质工程甜点预测方法,实现储层纵向甜点识别及压裂层位划分;通过管柱优化设计,形成了以封隔器+桥塞分层为主的机械硬分层技术;针对老油田高含水率储层,形成一套控水压裂技术实现老油田控水压裂开发;老油田精细分层控水压裂技术实现了纵向储层有效改造,该技术现场应用14口井,增产效果显著,为海上老油田高含水率储层有效开发提供了技术支撑。
The artificial injection water,the coning of edge and bottom water,and the"advanced"flow of water in the old oilfield have squeezed the oil circulation channel and seriously affected the productivity of oil and gas wells.The increase of water content has become the main contradiction in development and exploitation.At present,the commonly used water control technology often focuses on finding water,plugging water and sticking water in the wellbore.It is a passive water control method,and it is difficult to find water in horizontal wells,and it is more difficult to accurately plug water.Moreover,this method is more effective in the low water cut stage.In the middle and high water cut stage,the validity period will be shorter and shorter.The conventional fracturing process may crush the water layer and increase the risk of high water cut after fracturing. In order to solve this problem, the "fine layered hydraulic fracturing control technology in old oilfields" is proposed. By combining drilling time and logging total hydrocarbon, a set of sweet spot prediction method for geological engineering of offshore low permeability reservoir is formed, which realizes the identification of reservoir longitudinal sweet spot and the division of fracturing horizon. Through the optimization design of pipe string, the mechanical hard stratification technology based on packer + bridge plug stratification is formed. Aiming at the high water cut reservoir in the old oilfield, a set of controlled water fracturing technology is formed to realize the development of controlled water fracturing in the old oilfield. The fine layered water control fracturing technology in the old oilfield has realized the effective transformation of the vertical reservoir. The technology has been applied to 14 wells in the field, and the effect of increasing production is remarkable, which provides technical support for the effective development of high water cut reservoirs in the old offshore oilfield.
作者
徐延涛
曲喜墨
郭布民
王绪性
张雯
XU Yantao;QU Ximo;GUO Bumin;WANG Xuxing;ZHANG Wen(China Oilfield Services Limited,Tianjin 300459,China;Tianjin Offshore Oil Reserves Exploitation Enterprise Key Laboratory,Tianjin 300459,China)
出处
《石油化工应用》
CAS
2024年第11期30-34,共5页
Petrochemical Industry Application
关键词
控水压裂
甜点识别
分层压裂
water control fracturing
sweet spot identification
stratified fracturing
