Research and Application of Metal Complex - Amphoteric Polymer Drilling Fluid

Niu, Yabin; Xiao, Honzhang; Zheng, Wumuxi; Li, Jian

doi:10.2118/50932-ms

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Obviously, it comes to the problem of balancing PDF's inhibition and fluid loss as indispensable inhibition abates bentonite dispersion. Since the anionic polymer additive is effective in controlling fluid loss but lacks inhibition and the cationic polymer additive has strong inhibition but is unfavorable for controlling fluid loss, an amphoteric polymer additive combining advantages of both was invented and the amphoteric PDF was established around the 1990s (Niu et al, 1995;Niu et al, 1998;Warren et al, 2003;Liu et al, 2005;Cao et al, 2017).…”

Section: Amphoteric Pdfmentioning

confidence: 99%

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Jiang

Dong

et al. 2023

Front. Energy Res.

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Unconventional gas includes tight sandstone gas, shale gas, coalbed methane, and natural gas hydrate. With huge reserves, unconventional gas has become the most important natural gas resource successor after the end of the “Easy Oil era.” The drilling fluid is an indispensable wellbore working fluid for unconventional gas drilling with multiple functions. The polymer drilling fluid (PDF) is the most common, longest developed, and most diverse drilling fluid type. With advantages of easily controlled rheology, convenient on-site performance maintenance, and specifically low cost and weak environment pollution, the PDF is gradually replacing the oil-based drilling fluid as the first choice for unconventional gas drilling. The invention of the non-disperse low-solid-content PDF in the 1960s shows that PDF technology has entered the stage of scientific development, and until now, its development has generally experienced five stages: beginning, developing, improving, re-developing, and re-improving. Dozens of polymer additives and PDF systems have been invented and applied, which have solved severe drilling problems, greatly improved drilling efficiency, and promoted exploration and development in difficult oil and gas resources. This paper first reviews the research progress of PDF technology according to the timeline by introducing the composition, feature, advantages, and disadvantages of some representative polymer additives and PDF systems, emphatically the function and mechanism of stabilizing wellbores, lubricating drilling tools, and protecting reservoirs of the biomimetic wellbore-strengthening PDF and amphiphobic high-efficiency PDF in unconventional gas drilling. Then, combining future global demands, especially China’s strategic needs of oil and gas exploration and development, the development tendency of PDF technology is critically illustrated by introducing several potential research directions including intelligent PDF, ecological PDF, and PDF for natural gas hydrate and deep layer gas resources.

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Section: Amphoteric Pdfmentioning

confidence: 99%

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Jiang

Dong

et al. 2023

Front. Energy Res.

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Rheology of polymers

Mohanty,

Rossen,

Huh

2024

Interfacial Science for Geosystems Engineers

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Application of Drilling Fluid chemicals in China

Niu¹,

Liu²

2001

All Days

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This paper present the sixteen types of drilling fluid chemicals manufactured in china and describe some important chemicals in detail. The consumption of drilling fluid chemicals is listed on different types for each year. The tendency of consumption of chemicals is analyzed. According to API Classification of drilling fluid and characteristics of Chinese drilling fluid application, drilling fluids are classed in nine types. Explanation and formulations of nine types of drilling fluid are presented in this paper. The recent development of drilling fluids is presented in this paper. The recent development of drilling fluid chemicals and drilling fluid systems is analyzed. The mechanism and formulation of these new drilling fluids are presented. Nowadays, drilling fluid chemicals manufactured in china can satisfy the native market, some of them are exported to abroad market. Introduction The petroleum industry in China has gotten big development. In 1999, the total production of CNPC, SinoPEC and CNOOC in China had been 159,836,000 tons and the total drilling footage had reached 2466,900 meters (see table 1). Therefore the large quantity of drilling fluid chemicals are needed in drilling engineering. The development of drilling fluid chemicals can be classed as two stages. Before 1980s, the drilling fluid chemicals are introduced from foreigner country oil company and some similar chemicals are produced. Some chemicals used in civil engineering, such as CMC, starch, are introduced into drilling fluid. After 1980s, according to requirement of drilling engineering and geological characteristics in china, some new chemicals are developed and manufactured. Tendency of drilling fluid chemicals is that simple natural products are improved into modified products and natural products are replaced by synthetic products gradually. The non-dispersed polymer drilling fluid is main drilling fluid system in China. Classifications of drilling fluid chemicals The sixteen types of drilling fluid chemicals manufactured in china and some important chemicals are discribed as follow in detail. The consumption of drilling fluid chemicals is listed on different types for each year. Clay. In early time, clay used in drilling fluid is natural bentonite. The bentonite is calcium based with low quality, resulting low viscosity and high filtrate. In recent decades, the bentonite is improved into high quality bentonite. Some of them can be used as API bentonite. Other kinds of clay, such as attapulgite, organic clay, are developed out for petroleum industry. Weighting Materials. Main materials for increasing density of drilling fluid are barite, hematite, calcium carbonate. Various salts are solved into drilling or completion fluid for increasing density. Filtrate Reducer. There are more than 50 trade brands of filtrate reducer in China. The consumption annually reaches over 30,000 tons. All these filtrate reducers can be arranged in 6 kinds. Carboxymethyl cellulose. Including CMC-low viscosity, CMC-median viscosity and caustic CMC. Generally the degree of substitution is more than 0.5 and the degree of polymerization is 200?6000. Hydrolyzed polyacrylonitrile. Including sodium salt(Na-HPAN), calcium salt (Ca-HPAN) and ammonium salt (NH 4-HPAN). The molecular weight is 20,000?110,000, the degree of polymerization is 235?376 and the degree of hydrolysis is 60%. Polymer with median molecular weight. copolymer (PAC143, PAC142) of acrylamide and acrylate. Multiply- polymer (Sk-I, PAC144, JT888) of acrylamide, acrylate, acrylonitrile, acrylsulphonate and quaternary amine.

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Research and Application of Metal Complex - Amphoteric Polymer Drilling Fluid

Cited by 3 publications

References 4 publications

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Rheology of polymers

Application of Drilling Fluid chemicals in China

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