低渗透老油田柔性侧钻水平井挖潜技术  

Flexible sidetracking stimulation technology of horizontal wells in low-permeability mature oilfields

作　　者：翁定为[1,2] 孙强 梁宏波[1,2] 雷群 管保山[1] 慕立俊 刘汉斌[3] 张绍林[1,2] 柴麟[1,2] 黄瑞[1,2] WENG Dingwei;SUN Qiang;LIANG Hongbo;LEI Qun;GUAN Baoshan;MU Lijun;LIU Hanbin;ZHANG Shaolin;CHAI Lin;HUANG Rui(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;CNPC Key Laboratory of Oil&Gas Reservoir Stimulation,Langfang 065007,China;PetroChina Changqing Oilfield Company,Xi’an 710018,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油天然气集团有限公司油气藏改造重点实验室,河北廊坊065007 [3]中国石油长庆油田公司,西安710018

出　　处：《石油勘探与开发》2025年第1期194-203,共10页Petroleum Exploration and Development

基　　金：国家重点研发计划“储层超短半径取心钻具装备研制与集成”(2023YFF0615403);中国石油天然气集团有限公司科技项目“人造油气藏改造优化设计方法研究”(2023ZZ0803)。

摘　　要：针对低渗透老油田老井侧向深部剩余油气资源动用难度大的问题,形成了柔性侧钻水平井挖潜技术,并开展了现场试验。该技术首先采用柔性侧钻钻具在老井筒中实现低成本侧钻,然后采用水力喷射工艺诱导多条裂缝起裂,最后下入油管柱对侧钻井眼实施笼统多簇暂堵压裂,从而实现井间剩余储量的高效挖潜。该技术包含柔性侧钻水平井钻井和侧钻水平井压裂2项技术,前者主要涉及柔性钻杆结构和材料优化、钻进工艺、密闭取心工具3个方面,后者主要涉及压裂方案优化、压裂工具及实施工艺优化2个方面。该技术在长庆安塞油田开展了多轮现场试验,发现通过改变井型、缩小油水井排距,可以较好地建立压力驱替系统,实现压力的有效传导,从而达到低产低效井提液增产的目的,同时验证了该技术可为低渗透油藏剩余储量精准挖潜、储层精细动用提供有力支撑。A flexible sidetracking stimulation technology of horizontal wells is formed to develop the lateral deep remaining oil and gas resources of the low-permeability mature oilfields.This technology first uses the flexible sidetracking tool to achieve low-cost sidetracking in the old wellbore,and then uses the hydraulic jet technology to induce multiple fractures to fracture.Finally,the bullhead fracturing of multi-cluster temporary plugging for the sidetracking hole is carried out by running the tubing string,to realize the efficient development of the remaining reserves among the wells.The flexible sidetracking stimulation technology involves flexible sidetracking horizontal wells drilling and sidetracking horizontal well fracturing.The flexible sidetracking horizontal well drilling includes three aspects:flexible drill pipe structure and material optimization,drilling technology,and sealed coring tool.The sidetracking horizontal well fracturing includes two aspects:fracturing scheme optimization,fracturing tools and implementation process optimization.The technology has been conducted several rounds of field tests in the Ansai Oilfield of Changqing,China.The results show that by changing well type and reducing row spacing of oil and water wells,the pressure displacement system can be well established to achieve effective pressure transmission and to achieve the purpose of increasing liquid production in low-yield and low-efficiency wells.It is verified that the flexible sidetracking stimulation technology can provide favorable support for accurately developing remaining reserves in low-permeability reservoirs.

关 键 词：低渗透油田 老油田挖潜 柔性侧钻 超短半径水平井 多簇压裂 安塞油田 现场试验 

分 类 号：TE37[石油与天然气工程—油气田开发工程]