深层砂砾岩储层水平井压裂工艺技术

打开文本图片集

中图分类号：TE357.1 文献标志码：A 文章编号：1000-7393（2025）-04-0464-09

Abstract：Inresponse totheproblemofhighinitialproductionbutfastpressredropandlowcumulativeproductioninthedeepsand andgravelreservoirofKangtan1blockaftervertical wellpressre，ahorzontal wellvolumefracturingtechnologyexploration experiment wascariedouttoevaluatetheproduction potentialofsingle welsinthe blockandachieveeffectiveutilzationof reserves.Basedontheunderstanding ofsandand gravelrock core damage experiments and software simulatio optimizationresults，a segmentedclusteringoptimizationmode with"densecutingsegmentation+singlesegmentfewclusters+high-strengthsandaditionto create long fractures"as the core has been formed.A low damage fracturing fluid system with a high temperature of 130‰ was developed throughoptimizationexperimentsoffracturingfluidfomula，targetingthehigh temperatureandhighpressurestrongwater sensitivitycharacteristicsofreservoirs.Hightemperatureandhighsolubilitybidgeplugs，igh-strengthcompositeparticlesize ceramic proppants， and 140MPa construction grade completion casing and fracturing truck sets were selected. The fracturing technologyassucessllyompleedfeldtstsin4sectsd43ustsinteexpeientalwell，saddiogth of 3.5t/m and a construction flow rate of 14～16m3/min After fracturing，a two-stage oil nozzle of δ3mm+δ4.5mm is used for production，with a daily oil production of 70t. It is expected that the cumulative oil production during the self injection stage can reach 15 000t， and the final EUR of a single well can reach over 40 000t. The horizontal well volume fracturing technology has effectivelyimproved the stable productionand pressre stabilization efect inthedeepsandstonereservoirof Kangtanlblock， providing technicalsupportandreplicableoptimizationtemplatesforeficient explorationandbeneficialdevelopmentoftheblock.

Key words： Kangtan1 block; deepsand conglomerate; horizontal well volume fracturing; optimal design

0 引言

随着地质工程一体化技术的突破性进展，全球油气勘探开发正在经历一场深刻的结构性转变，逐步实现“三个转变”：即从中浅层向深层乃至超深层拓展、从常规油气向非常规油气资源跨越、从构造油气藏向岩性及复杂隐蔽油气藏转型［1]。（剩余14767字）