J58井区低渗薄层水平井分段压裂工艺参数优化研究

发布时间：2018-06-15 09:27

本文选题：低渗气藏 + 裸眼完井　；参考：《重庆科技学院》2017年硕士论文

【摘要】：J58井区是一个低孔、低渗、低压岩性圈闭气藏,局部存在地层水,但无统一的气水边界。该井区内微幅度构造、断裂带发育,自上而下发育了盒3、盒1、山2、山1多套储层,其中盒1层段为主力开发层。盒1产层为薄差层,上、下隔层分为薄、厚层两种。前期J58井区盒1储层评价阶段以直井为主,该区部署直井14口,采取直井常规压裂改造工艺,其中12口井不同程度见水,工业气流井仅为4口,整体压裂效果不是很理想。本文针对J58井区盒1储层直井常规压裂改造效果不明显的问题,根据盒1储层物性、气藏剖面特征及平面产水特征,提出了盒1低渗薄层压裂改造主体思路;利用测井资料计算储层岩石力学参数方法,建立了盒1储层的岩石力学参数和地应力的动静态关系曲线,较准确地预测了储隔层的应力剖面和力学参数;通过对盒1储层完井方式和压裂工艺的优选,提出了裸眼封隔器分段压裂技术,并优选出了低排量、变排量和采用低粘度压裂液的控缝高技术;优选了盒1储层压裂改造液体体系,提出了“胍胶基液+交联液”的混合压裂液体系方案,并利用压裂软件FracproPT10.3优化了盒1层主压裂施工参数。本文研究成果应用于生产现场,取得了较好效果。
[Abstract]:J58 well area is a low porosity, low permeability, low pressure lithologic trap gas reservoir with local formation water, but no uniform gas-water boundary. In this well area, the micro-amplitude structure and fault zone are developed, and more than one set of reservoirs have been developed from top to bottom, such as box 3, box 1, Shan 2 and Shan 1. Box 1 production layer is thin difference layer, upper and lower layer is divided into thin and thick layer. In the early stage of reservoir evaluation of J58 well block box 1, 14 straight wells were deployed in this area, and the conventional fracturing technology was adopted in this area. Among them, 12 wells were water in varying degrees, and only 4 were industrial airflow wells. The overall fracturing effect was not very good. In view of the problem that the effect of conventional fracturing reconstruction in the box 1 reservoir of J58 well area is not obvious, according to the physical properties of reservoir, the characteristics of gas reservoir profile and the characteristics of water production in plane, the main idea of fracturing reconstruction for box 1 low permeability thin layer fracturing is put forward in this paper. By using logging data to calculate the rock mechanics parameters of reservoir, the dynamic and static relationship curves between rock mechanics parameters and in-situ stress of reservoir No. 1 are established, and the stress profile and mechanical parameters of reservoir separation layer are predicted more accurately. Based on the selection of completion mode and fracturing technology of Box1 reservoir, the fracturing technology of open hole Packer is put forward, and low displacement, variable displacement and fracturing high control technology with low viscosity fracturing fluid are selected. The fracturing fluid system of box 1 reservoir was selected, and the mixed fracturing fluid system of guanidine gel based fluid crosslinking fluid was put forward, and the main fracturing parameters of box 1 layer were optimized by fracturing software FracproPT10.3. In this paper, the research results are applied to the production site, and good results have been obtained.
【学位授予单位】：重庆科技学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.1

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