Results 11 to 20 of about 131,269 (334)

Research and Application of Evaluation Methods for Functional Characteristics of Oil-Based Drilling Fluid in Shale Gas Wells

open access: yesGeofluids, 2021
Intelligent unconventional reservoir optimal production control technology is a comprehensive technology, involving geology, reservoir simulation, and efficient drilling and completion.
Dewei Gao   +5 more
doaj   +2 more sources

A Submicron-Scale Plugging Agent for Oil-Based Drilling Fluid Synthesized Using the Inverse Emulsion Polymerization Method. [PDF]

open access: yesPolymers (Basel), 2023
Due to the increasing difficulty of drilling in the later stages of oil and gas field development, the development of micro-pores and micro-fractures is becoming common. Conventional plugging agents have relatively large particle sizes.
Zhang Z, Dai B, Xu P.
europepmc   +2 more sources

Molecular Simulation of Interactions between High-Molecular-Polymer Flocculation Gel for Oil-Based Drilling Fluid and Clay Minerals. [PDF]

open access: yesGels, 2022
China has abundant shale gas resources with great potential, which may serve as a significant support for the development of a “low-carbon economy”. Domestic shale gas resources are buried deeply and difficult to exploit due to some prevalent issues ...
He Z   +7 more
europepmc   +2 more sources

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

open access: yesGeofluids, 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   +2 more sources

Evaluation of the Effects of Kaolin Clay on the Performance of Barite-Weighted Oil-Based Drilling Fluid. [PDF]

open access: yesACS Omega
Drilling fluid is an essential component that helps keep the wellbore stable during fast drilling operations. However, problems arise when drilling fluids are contaminated with cuttings from the drilled formation, which impacts the wellbore integrity and
Basfar S   +4 more
europepmc   +2 more sources

Experimental Optimization of High-Temperature-Resistant and Low Oil—Water Ratio High-Density Oil-Based Drilling Fluid

open access: yesProcesses, 2023
Problems such as well loss and collapses in deep shale gas drilling are most often due to the development of cracks in the shale formation, resulting in significant leaks of drilling fluid, the sticking and burrowing of drilling tools, and other ...
Zhenzhen Shen   +6 more
semanticscholar   +1 more source

Application of Organoclays in Oil-Based Drilling Fluids: A Review

open access: yesACS Omega, 2023
Organoclays (OCs), formed by surface modification of clay minerals using organic compounds, are typical additives for providing rheology for oil-based drilling fluids (OBDFs). There are different studies on the effect of OCs on the rheological properties of oil-based systems under high-pressure, high-temperature (HPHT) conditions, but finding new OCs ...
Ali Mahmoud   +2 more
openaire   +2 more sources

Rheology assessment and barite sag in a typical North Sea oil-based drilling fluid at HPHT conditions

open access: yesYu-byeon-hag, 2023
The occurrence of barite sag in drilling fluids has relatively often been the cause for gas kicks in oilwell drilling. The subsequent absorption of gas into drilling fluid could lower the density and reduce the viscosity of the drilling fluid, thereby ...
T. N. Ofei   +4 more
semanticscholar   +1 more source

Soluble pozzolanic materials from coal bottom ash as cement replacement material [PDF]

open access: yes, 2021
Nowadays, intensive research in production of highly reactive pozzolanic materials from industrial waste to replace cement is crucial. This action expected to increase industrial waste recycling rate and at the same time reduce extraction of non ...
Abd Wahab, Azrina   +3 more
core   +1 more source

The biodiesel-based flat-rheology drilling fluid system

open access: yesPetroleum Exploration and Development, 2022
As the base oil of the current flat-rheology synthetic drilling fluid is high in cost and not renewable, the biodiesel-based flat-rheology drilling fluid with low-cost, environmental protection and renewable advantage was studied.
Guancheng JIANG, He SHI, Yinbo HE
doaj   +1 more source

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