摘要
针对艾湖油田玛18井区低渗透砂砾岩油藏直井压裂单井可采储量低、经济效益差的问题,通过油藏数值模拟法、油藏工程方法、经济极限法和矿场试验法对多级压裂水平井参数设计和产能预测开展研究。结果表明:玛18井区“甜点”深度为3876~3881 m,水平井走向应为南北向,推荐水平井水平段长度为1200~1400 m,井间距为500 m,裂缝半长为150 m,裂缝间距为50 m。采用优化参数设计6口多级压裂水平井,第1 a平均日产油为29.0 t/d,符合产能预测数据(25.0~33.0 t/d)。该研究建立了砂砾岩储层含油饱和度预测方法,并形成砂砾岩油藏多级压裂水平井参数设计和产能预测方法,可为同类油藏的开发提供借鉴。
In response to the problems of low recoverable reserves and poor commercial benefits of single well with vertical well fracturing in low-permeability conglomerate reservoir in Well Block Ma18,Aihu Oilfield,the parameter design and productivity prediction of multi-stage fractured horizontal wells were investigated by numerical reservoir simulation,reservoir engineering method,economic limit method and mine field test method.The results indicated that the"sweet spot"depth in Well Block Ma18 was 3876 to 3881 m,the horizontal well strike should be in north-south direction,the recommended length of horizontal interval in horizontal well was 1200 to 1400 m,the well spacing was 500 m,the fracture half-length was 150 m,and the fracture spacing was 50 m.Six multi-stage fractured horizontal wells were designed with optimized parameters,achieving an average daily oil production of 29.0 t/d in the first year,which was consistent with the predicted production of 25.0 to 33.0 t/d.This study developed an oil saturation prediction method for conglomerate reservoir,and developed a method of parameter design and productivity prediction for multi-stage fractured horizontal wells in conglomerate reservoir,providing a reference for similar reservoirs.
作者
李浩楠
师耀利
姚振华
李晓梅
宋平
谭龙
Li Haonan;Shi Yaoli;Yao Zhenhua;Li Xiaomei;Song Ping;Tan Long(PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2021年第6期83-90,共8页
Special Oil & Gas Reservoirs
基金
中国石油重大专项“新疆油田已开发水驱油藏二三结合提高采收率技术研究与应用”(2017E-04-06)。
关键词
低渗透砂砾岩油藏
多级压裂水平井
产能预测
艾湖油田
玛18井区
low-permeability conglomerate reservoir
multi-stage fractured horizontal well
productivity prediction
Aihu Oilfield
Well Block Ma18
