Results 21 to 30 of about 493,831 (303)

Mechanical properties and damage constitutive model of mud shale under different drilling fluids immersion

Meitan kexue jishu, 2023
In the process of shale oil and gas drilling, the long-term erosion and weakening of drilling fluids promotes the extension and expansion of micro-fractures on mud shale, which leads to the reduction of rock mass strength and seriously threatens the ...
Diandong GENG, Xianyin QI, Peng FU, Shengwei WANG, Ting KE   +4 more
doaj   +1 more source

Damage Mechanism of Oil-Based Drilling Fluid Flow in Seepage Channels for Fractured Tight Sandstone Gas Reservoirs

Geofluids, 2019
Oil-based drilling fluids (OBDFs) have a strong wellbore stabilization effect, but little attention has been paid to the formation damage caused by oil-based drilling fluids based on traditional knowledge, which is a problem that must be solved prior to ...
Peng Xu, Mingbiao Xu
doaj   +1 more source

INFLUENCE OF THE ADDITIVE OF COPPER NANOPARTICLES ON THE PROPERTIES OF DRILLING FLUIDS

Известия Томского политехнического университета: Инжиниринг георесурсов, 2023
Link for citation: Tretyak A.Ya., Krivosheev K.V., Bezmolitvenny D.I. Influence of the additive of copper nanoparticles on the properties of drilling fluids. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 7, рр.
Alexander Ya. Tretyak, Kirill V. Krivosheev, Dmitry I. Bezmolitvenny   +2 more
doaj   +1 more source

POLYMER MATERIALS FOR IMPROVING THE RHEOLOGICAL PROPERTIES OF DRILLING FLUIDS

, 2023
<p>This article discusses the synthesis and study of the physicochemical properties of modified polyacrylonitrile in the presence of gossypol resin and vinyl sulfonic acid. It is assumed that this polymer composite will be used to increase the heat
Artykova Zh., Beisenbayev O., Sakibayeva S.   +2 more
core   +1 more source

Hawaii Scientific Drilling Project 1993 [PDF]

, 1994
Content: Project Summary, History of Hawaii Project, Permit History, Continental Scientific Drilling Office's Role, Setup and Coring of Kahi Puka Site, Downhole Problems, Cures for Problems, Conclusions, Appendices: Correspondence for Increase in Depth ...

core   +3 more sources

The Application of an Oil-Based Drilling Fluid with Strong Plugging Capacity in Pilot Test Shale Oil Wells in Qibei Area

Zuanjingye yu wanjingye
The proved undeveloped shale oil reserves in block Qibei of Dagang oilfield are still very high and their burial depths can be 4,500 m or deeper. This oil and gas enrichment area is located in the Shahejie reservoir which has high content of clays as ...
Hong MA, Tao ZHUANG, Fei WEN, Leilei WANG, Xiaochen LI, Anliang CHEN, Yu WANG   +6 more
doaj   +1 more source

Applicability of Fe3O4 nanoparticles for improving rheological and filtration properties of bentonite-water drilling fluids in the presence of sodium, calcium, and magnesium chlorides

Journal of Petroleum Exploration and Production Technology, 2020
There are impressive efforts in conjunction with improving rheological and filtration properties of Water-Based Drilling Fluids (WBDFs) employing Nano-Particles (NPs).
Alireza Rezaei, Vahid Nooripoor, Khalil Shahbazi   +2 more
doaj   +1 more source

A Novel Thermo-Thickening Oil-Based Drilling Fluid Based on Composite Thickener Under High Temperature and Pressure

Energies
Under high-temperature conditions in deep well formations, oil-based drilling fluids tend to show degraded rheological properties and reduced suspension capacity, which may impair wellbore cleanliness and circulation pump pressure and hinder drilling. To
Weijie Chen, Xiaoming Tang, Leilei Wang, Hong Ma, Anliang Chen, Jian Zhang, Weian Huang, Guanzheng Zhuang, Hanyi Zhong, Xianbin Zhang   +9 more
doaj   +1 more source

Rapid RAFT Polymerization of Acrylamide with High Conversion

Molecules, 2023
Rapid RAFT polymerization can significantly improve production efficiency of PAM with designed molecular structure. This study shows that ideal Reversible Addition–Fragmentation Chain Transfer (RAFT) polymerization of acrylamide is achieved in dimethyl ...
Xuejing Liu, Qiang Sun, Yan Zhang, Yujun Feng, Xin Su   +4 more
doaj   +1 more source

Drilling fluids: presence of hazardous BTEXs and crystalline silica [PDF]

, 2020
In the oil and gas industry occupational health risks due to drilling fluids is severe. Mixing room, shale shaker room and drill floor are sites where workers are highly exposed to air pollutants, hazardous dust and even substances generated via drilling
Chan, Lakmun, Arumugam, Nithiya, Chelliapan, Shreeshivadasan, Thirugnana, Sathiabama T.   +3 more
core   +1 more source