陆相夹层型页岩油超长水平井开发技术

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中文摘要：庆城油田长 7页岩油矿区内水源区、林缘区分布较广,开发动用难度大,地面受限地质储量约 1.67×108 t.超长水平井控制面积大、井控储量高,能更好地动用受限储量,提高长 7页岩油采收率.在三维地质工程甜点精准刻画的基础上,优选了超长水平井部署区域,识别了优势段、潜力段、断层发育段、裂缝发育段,制定了精细差异化压裂方案,实现了缝控储量最大化,并建立了超长水平井评价体系,从油藏因子指标、油藏开发指标、经济效益指标三方面对其开发效果进行了评价.现场应用表明,随水平段长增加,Ⅰ+Ⅱ类油层由 623 m增至 2 337 m,井控储量由 16.9×104 t升至 45.9×104 t,初期单井产量由 9.6 t/d升至 25.1 t/d,阶段单井产量由 1×104 t升至 1.5×104 t.庆城油田采用超长水平井实现了环境敏感区不同类型储层的有效动用,提升了页岩油开发经济效益.该研究对于同类页岩油开发具有借鉴意义.

外文标题：Ultra-long horizontal well development technology for continental interbedded shale oil

外文摘要：Chang 7 shale oil play in Qingcheng Oilfield,with widespread water source area and marginal forest area,is difficult to exploit,and hosts a restricted original oil in place(OOIP)of approximately 1.67×108 t.Ultra-long horizontal well can realize a large control of drainage area and reserves,so it can be adopted to effectively exploit the restricted OOIP and enhance the recovery of Chang 7 shale oil.Based on the precise delineation of 3D geological engineering sweet spots,the optimal deployment site of ultra-long horizontal well was determined,and the predominant intervals,potential intervals,fault intervals,and fracture intervals were identified.Then,a fine and differentiated fracturing scheme was prepared to achieve"fracture-controlled reserves maximization".Moreover,an evaluation system for ultra-long horizontal well was established to evaluate the development performance from three indexes:reservoir factor,reservoir development,and economic benefits.Field application shows that with the increase of horizontal section length,the thickness of Class I+II oil reservoirs increases from 623 m to 2 337 m,the well-controlled reserves increase from 16.9×104 t to 45.9×104 t,the initial well production rate increases from 9.6 t/d to 25.1 t/d,and the stage well production increases from 1×104 t to 1.5×104 t.The use of ultra-long horizontal well in Qingcheng Oilfield enables the effective exploitation of different types of reservoirs in environmentally sensitive areas and improves the economic benefits of shale oil development.This technology is referential for the development of similar shale oil reservoirs

外文关键词：

shale oillow-permeability reservoirreservoir engineeringgeology-engineering integrationultra-long horizontal welldeveloping technologyperformance evaluationQingcheng Oilfield

作者：

马立军、梁晓伟、贾剑波、何启航、韩子阔、吴霞、关云、方泽昕、曹鹏福

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作者单位：

中国石油长庆油田页岩油开发分公司,甘肃庆阳 745000

低渗透油气田勘探开发国家工程实验室,陕西西安 710018

中国石油长庆油田分公司勘探开发研究院,陕西西安 710018

关键词：

页岩油低渗透油藏油藏工程地质工程一体化超长水平井开发技术效果评价庆城油田

基金：

国家科技重大专项中国石油天然气股份有限公司重大专项

项目编号：

2017ZX050692021DJ1806

出版年：

2024

DOI：

10.13639/j.odpt.202404044

石油钻采工艺

华北油田分公司华北石油管理局

石油钻采工艺

CSTPCD北大核心

影响因子：0.975

ISSN：1000-7393

年,卷(期)：2024.46(2)