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Utilization of MSWI fly ash as partial cement or sand substitute with focus on cementing efficiency and health risk assessment

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Frontiers of Environmental Science & Engineering 2020年第1期14卷 87-97页

作者： Lei Zheng Xingbao Gao Wei Wang Zifu Li Lingling Zhang Shikun Cheng School of Energy and Environmental Engineering University of Science and Technology Beijing.Beijing 100083China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China School of Environment Tsinghua UniversityBeijing 100084China

The strength of cement substituted mortar decreases with the increase in fly ash amount,whereas the strength increases when the fly ash is blended as sand substitute.A mortar with highest strength(compressive strength=30.2 Mpa;flexural strength=7.0 Mpa)was obtained when the sand replacement ratio was 0.75%.The k value(cementing efficiency)of fly ash varied between 0.36 and 0.15 for the fly ash fraction in binder between 5%and 25%.The k values of fly ash used for sand replacement were all significantly above that used for cement *** macropores assigned to the gaps between particles decreased when the fly ash was used as sand replacement,providing an explanation for the strength *** waste-extraction procedure(toxicity-sulphuric acid and nitric acid method(HJ/T 299-2007))was used to evaluate metal leaching,indicating the reuse possibility of fly ash blended *** the mortar with the mass ratio of fly ash to binder of 0.5%,the carcinogenic risks(CR)and non-carcinogenic hazard quotient(HQ)in sensitive scenario for blended mortar utilization were 9.66 x 10 and 0.06,respectively;these results were both lower than the threshold values,showing an acceptable health *** CR(9.89 x 105)and HQ(3.89)of the nonsensitive scenario for fly ash treatment exceeded the acceptable threshold values,indicating health risks to onsite *** main contributor to the carcinogenic and non-carcinogenic risk is Cr and Cd,*** CR and HQ from inhalation was the main route of heavy metal exposure.

关键词： MSWI fly ash cementing efficiency Health risk assessment of heavy metal Sand replacement Cement replacement

COST REDUCTION OF cementing FILL IN KANGJIAWAN MINE

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中国有色金属学会会刊：英文版 1997年第1期7卷 6-8页

作者： Wang, Xinmin Zhang, Qinli Chen, Changmin Li, Yanping Central South Univ of Technology Changsha China

ＣＯＳＴＲＥＤＵＣＴＩＯＮＯＦＣＥＭＥＮＴＩＮＧＦＩＬＬＩＮＫＡＮＧＪＩＡＷＡＮＭＩＮＥＷａｎｇＸｉｎｍｉｎ，ＺｈａｎｇＱｉｎｌｉＤｅｐａｒｔｍｅｎｔｏｆＲｅｓｏｕｒｃｅｓＥｘｐｌｏｉｔａｔｉｏｎＥｎｇｉｎｅｒｉｎｇ... 详细信息

ＣＯＳＴＲＥＤＵＣＴＩＯＮＯＦＣＥＭＥＮＴＩＮＧＦＩＬＬＩＮＫＡＮＧＪＩＡＷＡＮＭＩＮＥＷａｎｇＸｉｎｍｉｎ，ＺｈａｎｇＱｉｎｌｉＤｅｐａｒｔｍｅｎｔｏｆＲｅｓｏｕｒｃｅｓＥｘｐｌｏｉｔａｔｉｏｎＥｎｇｉｎｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖ...

关键词： fill cost cement consumption continuous filling time cementing rockfill

Challenges and Methods to Improve Well cementing Quality for 177.8 mm Liner in Gaoshiti-Moxi Area

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Journal of Power and Energy Engineering 2018年第9期6卷 1-8页

作者： Bin Li Jianhua Guo Quan Cao Chi Chen Lin Hu Engineering Technology Research Institute of SouthWest Oil and Gas Field Company Chengdu China Exploration Division of SouthWest Oil and Gas Field Company Chengdu China Chuanzhong Oil & Gas Mines of SouthWest Oil and Gas Field Company Suining China

Gaoshiti-Moxi structure belt of An-Yue Sinian gas reservoir, which was China’s largest monomer Marine carbonate gas reservoir up to now, located in vying-dragon female temple structure group that belong to the ancient uplift slope of the middle of Sichuan. With the exploration and development of high temperature and high pressure carbonate reservoir, a large number of challenges and problems, such as long isolation section, active oil-gas show, large temperature difference, prone to super retarding cement slurry and gas channeling at flare position, have been encountered in the cementing of 177.8 mm hang-liner. In order to solve these problems, numerous measures and methods have been put into use for reducing the safety risk of cementing and improving cementing quality. The large temperature difference channeling cement slurry system, effective anti-pollution spacer and high-pressure packer type liner hanger were developed and applied for field tests in the early stage of development. In addition, equilibrium pressure cementing technology, optimizing of centralizer placement and plasma column structure, improvement of pump displacement and hold pressure while waiting on cement were used to ensure nice displacement efficiency and cementing quality. As Moxi X well for example, the cementing quality factor of merit was 40.29% and the qualification rate was up to 78.87% after adopting the cementing measures and methods above. The cementing quality was much higher than previous level and provided technical support for Gaoshiti-Moxi area.

关键词： GM Area Liner cementing Long Isolation Section Large Temperature Difference Anti-Intrude Cement Slurry

A Study of Laminar-cementing Displacement Model for Horizontal Well

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China Oil & Gas 1996年第1期3卷 38-39页

作者： Zheng Yonggang Hao Junfang(University of Petroleum,Dongying)(Southwest petroleum Institute,Nanchong) University of Petroleum Dongying Southwest Petroleum Institute Nanchong

ＡＳｔｕｄｙｏｆＬａｍｉｎａｒ－ｃｅｍｅｎｔｉｎｇＤｉｓｐｌａｃｅｍｅｎｔＭｏｄｅｌｆｏｒＨｏｒｉｚｏｎｔａｌＷｅｌｌＺｈｅｎｇＹｏｎｇｇａｎｇ；ＨａｏＪｕｎｆａｎｇ（ＵｎｉｖｅｒｓｉｔｙｏｆＰｅｔｒｏｌｅｕｍ，Ｄｏ... 详细信息

ＡＳｔｕｄｙｏｆＬａｍｉｎａｒ－ｃｅｍｅｎｔｉｎｇＤｉｓｐｌａｃｅｍｅｎｔＭｏｄｅｌｆｏｒＨｏｒｉｚｏｎｔａｌＷｅｌｌＺｈｅｎｇＹｏｎｇｇａｎｇ；ＨａｏＪｕｎｆａｎｇ（ＵｎｉｖｅｒｓｉｔｙｏｆＰｅｔｒｏｌｅｕｍ，Ｄｏｎｇｙｉｎｇ）（Ｓｏｕｔｈｗｅｓｔ...

关键词： Horizontal well cementing Model

Analysis of the Weight Loss of High Temperature Cement Slurry

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1307-1318页

作者： Kunhong Lv Zhiqiang Huang Xingjie Ling Xueqin Xia College of Petroleum Engineering Yangtze UniversityWuhan430199China

The weight loss of cement slurry is the main cause of early annular air channeling and accurate experimental evaluation of the law of loss change is the key to achieve compression stability and prevent this undesired ***,tests on the pressure loss of cement slurry are carried out for temperature smaller than 120°C,and this condition cannot simulate effectively the situation occurring in high temperature *** this reason,in this study a series of experimental tests have been conducted considering a larger range of temperatures,different retarders and fluid loss *** results show that with an increase in the temperature,the weight loss curve of cement slurry changes from a“two-stage”to a“three-stage”behavior,and the risk of channeling increases *** increasing the amount of retarder and fluid loss additive,the transition time of cement slurry displays a non-monotonic behavior(it decreases first and then increases).It is found that the optimized retarder and fluid loss additive dosage are 0.2%and 2.5%,respectively.

关键词： cementing weight loss test weight loss law cement slurry evaluation anti-gas channeling

Colloidal gas aphron(CGA) based foam cement system

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Petroleum Exploration and Development 2019年第6期46卷 1281-1287页

作者： VELAYATI Arian ROOSTAEI Morteza RASOOLIMANESH Rasool SOLEYMANI Mohammad FATTAHPOUR Vahidoddin University of Alberta Edmonton T6G 2R3Canada RGL Reservoir Management Inc. Leduc T9E 0B7Canada Supervisor of Design and Exploitation Unit at Ehyasepahan Iron Mines(EIM) Tehran ***Iran Drilling Technologies Director RIPITehran ***Iran

To solve the problems such as high denstiy,foam instability,low compressive strength,high porosity and poor durability associated with conventional foam cements,a novel colloidal gas aphron(CGA)based foam cement system was investigated and tested for *** is used in a base slurry as the foam component and the recipe was optimized with hollow sphere and micro-silica in terms of particle size distribution(PSD).Porosity,permeability,strength,brittleness,elasticity,free water content,foam stability and density tests on the CGA based foam cement system were carried out to evaluate the performance of the *** to the experiment results,at the foam proportion of 10%,the cement density was reduced to 1040 kg/m3,and stable microfoam net structure not significantly affected by high temperature and high pressure was formed in the cement *** optimal CGA based foam cement has a free water content of 0%,porosity of 24%,permeability of 0.7×10-3μm2,low elasticity modulus,high Poisson’s ratio,and reasonable compressive strength,and is more elastic and flexible with capability to tolerate regional stresses.

关键词： colloidal gas aphron foam cement light weight cement compressive strength well cementing

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Principle and Method of Optimization Design for Soft Soil Stabilizer

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Journal of Wuhan University of Technology(Materials Science) 2009年第1期24卷 154-160页

作者：黄新李战国 Department of Civil Engineering BeiHang University

A stabilized soil structure formation model was introduced. In order to form compact stabilized soil structure, cementitious hydrates were needed to wrap and bind the soil aggregates. Meanwhile, expansible hydrates were needed to squeeze and fill the pores, especially the pores in the aggregates. The experimental results show that the influences of various chemical characteristic factors of soil on the strength of the stabilized soil are boiled down, for the influence on the concentration of Ca（OH）2 in the pore solution of the stabilized soil, and the amount of CSH generated by cement. Finally an optimization design method is proposed, with which the stabilizer can be designed according to characteristics of soil samples.

关键词： soil stabilization structure formation model filling pores cementing stabilizerdesign

A minimum volume prediction of spacer based on turbulent dispersion theory: Model and example

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Petroleum 2019年第4期5卷 397-401页

作者： Deyang Xu Jianchun Guo Bin Yuan Dayang Wen Xiang Fang Hailiang Li Bo Ling CNOOC(China)Co. Ltd.Tianjin BranchTianjing300459China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Oilfield Chemistry R&D Institute COSLYanjiaoSanhe065201China Research Institute of Drilling and Production Technology PetroChina Qinghai Oilfield Company Ltd.Jiuquan736202China

During cementing operations involving cement slurry contamination,problems often occur due to the inaccurate calculation of the space fluid *** study,based on the turbulent dispersion theory,developed a minimum volume calculation model of spacer fluid to prevent cement slurry *** model was used to analyze influence factors and practical *** results indicated that the minimum volume of spacer fluid increase with the eccentricity of casing and injection rate and decrease with the density of cement ***,the better rheological properties of the cement slurry and spacer fluid would increase the volume of the spacer ***,this model fitted actual field data better than other heat calculation models.

关键词： cementing Spacer fluid Mixing volume Dispersion coefficient

Properties and Application of Oil-well Cement Enhanced with a Novel Composite Toughening Agent

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Petroleum Science 2007年第2期4卷 52-59页

作者： Hua Sudong Yao Xiao College of Materials Science and Engineering Nanjing University of Technology Nanjing Jiangsu 210009 China

Brittle fracture of cement sheath, induced by perforation and stimulation treatments, can cause cross flow of formation fluid and increase casing damage. A novel agent XL was developed for solving the problem. Experimental results showed that the toughness of the set cement containing XL was improved remarkably. The engineering properties of the slurry containing XL, drag reducer USZ （0.2% BWOC）, filtrate loss additive F 17B （1.2% BWOC） and crystalloid expanding agent F17A （3% BWOC） could meet technical requirements of cementing operation. After perforation, good quality cement sheath enhanced with XL was observed by CBL/VDL logs in a deep well.

关键词： Oil-well cement cementing cement sheath set cement fiber