黄陵探区延长组储层压裂改造工艺技术分析

摘要

The Huangling deep lacustrine Yanchang formation found that large-scale oil reservoirs,which is a major discoveries in Yanchang Oilfields.For the Yanchang reservoirs in Huangling exploration area are characterized by the poor continuity,the rapid change of oil-bearing sand-bodies,and the strong uneven property,and possess the typical features of low holes,low permeability,low pressure and low degree of richness.In recent years of oil exploration,after the continuous researches,test and field uses,aseries of fracturing reform technologies are summarized,which are adptable to the turbidite oil reservoirs in Huangling region,and thus getting the better effect after the field construction.Therefore,an explanation of fracturing reform technology is conducted from the following aspects like perforation technology,fracturing technology with sand,especially the confirmation of fracturing liquid system,supporting agent and construction main parameters,and fracturing collocation technology.Then,this reform technology has been analyzed and proved by the field construction state and the result of research in the room,some suggestions are presented aiming at the next step of fracturing reform work about the yangchang reservoirs in Huangling exploration area.%黄陵探区深湖相延长组储层发现规模石油储量,这是延长油田的重大发现。针对黄陵区延长组储层连续性差、含油砂体变化快、非均质性强,具有低孔、低渗、低压、低丰度的特点,在近几年的石油勘探过程中,通过不断研究、试验和现场应用,总结出一套基本适应于该区延长组储层的压裂改造工艺,现场施工后取得了较好的效果。为此,从射孔工艺、加砂压裂工艺特别是压裂液体系、支撑剂、施工主要参数的确定、压裂配套工艺等多个方面进行了阐述,并对现场的施工情况和室内的研究成果加以分析和佐证。最后,对黄陵延长组储层的下一步压裂改造工作提出了建议。