页岩油水平井体积压裂及微地震监测技术实践  

Practice of volume fracturing and microseismic monitoring technology in horizontal wells of shale oil

作　　者：刘博[1] 徐刚[1] 纪拥军[2] 魏路路 梁雪莉[1] 何金玉[2] LIU Bo;XU Gang;JI Yongjun;WEI Lulu;LIANG Xueli;HE Jinyu(New Resources Geophysical Exploration Division,Bureau of Geophysical Prospecting INC.,CNPC,Zhuozhou 072751,Hebei,China;PetroChina Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China)

机构地区：[1]中国石油集团东方地球物理勘探有限责任公司新兴物探开发处,河北涿州072751 [2]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《岩性油气藏》2020年第6期172-180,共9页Lithologic Reservoirs

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目“煤炭地下气化关键技术研究与先导试验”(编号:2019E-25JT)资助。

摘　　要：为探索和解决准噶尔盆地吉木萨尔区块页岩油藏水平井体积压裂和平台式拉链压裂过程中人工裂缝网络的成像问题,储层改造方案采用高密度密集切割体积压裂充分改造储层,大排量施工满足多簇、多缝充分开启,滑溜水和胍胶逆混合压裂工艺实现高效造缝携砂,结合多种粒径支撑剂有效充填微细裂缝及主体人工裂缝。通过微地震井中监测技术识别页岩油水平井人工裂缝网络。结果表明:断层和天然裂缝带对微地震事件属性特征有影响,同时事件属性特征也能表征断层和天然裂缝的发育程度。在大规模体积压裂改造下,研究区内4口井的人工裂缝横向相互连通,形成了复杂的裂缝网络。压后投产初期的日产油量得到了较大提升,为该区页岩油的长期高效开发提供了技术依据。In order to explore and solve the imaging problem of artificial fracture network during horizontal well volume fracturing and bench top zipper fracturing of shale reservoir in Jimsar block, Junggar Basin,high density dense cutting volume fracturing was adopted to carry out reservoir stimulation,large displacement construction can meet the requirements of full opening of multiple clusters and fractures,reverse mixed fracturing process of slick water and guar gum can realize high-efficiency fracture making and sand carrying, and combined with a variety of particle size proppant,it can effectively fill micro fractures and artificial fractures. The artificial fracture network of shale oil horizontal well was identified by microseismic monitoring technology. The results show that faults and natural fracture zones have influence on microseismic events attribute characteristics,and events attribute characteristics can also show the development degree of faults and natural fractures. Under large-scale volume fracturing,the artificial fractures of four wells in the study area were connected with each other horizontally,forming a complex fracture network. The daily oil production in the initial stage of production after fracturing has been greatly improved,and it can provide a technical basis for long-term and efficient development of shale oil in this area.

关 键 词：页岩油 密切割体积压裂 储层改造 微地震监测 缝网评价 吉木萨尔凹陷 

分 类 号：P631[天文地球—地质矿产勘探]