Experiment on properties of lost circulation materials in high temperature formation

被引：0

作者：

Bao D. ^{[1
]}

Qiu Z. ^{[1
]}

Qiu W. ^{[2
]}

Wang B. ^{[2
]}

Guo B. ^{[2
]}

Wang X. ^{[2
]}

Liu J. ^{[2
]}

Chen J. ^{[3
]}

机构：

[1] School of Petroleum Engineering, China University of Petroleum, Qingdao, 266580, Shandong

[2] Drilling Technology Research Institute, Sinopec Shengli Petroleum Engineering Corporation Limited, Dongying, 257064, Shandong

[3] COSL Oilfield Chemicals Division, Sanhe, 065200, Hebei

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2019年 / 40卷 / 07期

关键词：

Evaluation parameters; Experimental methods; High temperature formation; Lost circulation; Lost circulation materials of high temperature resistant;

D O I：

10.7623/syxb201907009

中图分类号：

学科分类号：

摘要：

The plugging technology for deep-well high temperature formation has high requirements on temperature resistance, compressive strength and settlement stability of the lost circulation materials (LCMs). This article was focused on the technical problems of curing losses in high temperature formation. This study established the experimental method to evaluate temperature resistance of LCMs, such as organic plant, organic polymer and inorganic mineral. The evaluation parameters including mass loss rate, size degradation rate, crushing rate, resiliency deformation rate, friction coefficient and breaking strength retention rate. Scanning electron microscope was used to observe the microstructure of LCMs before and after high temperature aging. The mechanism of poor performance of LCMs after high temperature aging was proposed. A fracture sealing testing apparatus was proposed to carry out sealing experiment at high temperature and high pressure. Instability mechanism of sealing zone caused by high temperature aging was investigated. Three kinds of LCMs, such as fine filling particles, elastically deformed particles and flaky materials were selected which could resist 220℃. Based on heat-resistant polymer and inorganic mineral materials, two types of novel high-temperature resistant LCMs were prepared, i.e., the rigid bridge particles with high compressive strength and low density, and high strength fiber. Based on the basic principle of tight sealing with high sealing pressure of strong-chain network structure. Different kinds of high-temperature resistant LCMs were synergized to seal fracture. High-temperature resistant LCM formulas were optimized for tapered slot with different entrance width. The sealing pressure was more than 10 MPa. The LCM formulas had good suspension capacity and high acid solubility. It could solve the lost circulation problem in high temperature deep well or reservoir. © 2019, Editorial Office of ACTA PETROLEI SINICA. All right reserved.

引用

页码：846 / 857

页数：11

共 33 条

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