Effect of Cement Contamination on Some Properties of Drilling Mud

Joel, O.F.; Ndubuisi, Elizabeth; Ikeh, L.

doi:10.2118/163023-ms

Cited by 10 publications

(5 citation statements)

References 1 publication

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“…The slurry that contains 50%OBMs had a pasty consistency and did not contain free water; this improved the macro performance of the mixed slurry. It has been reported in the literature that the workability of the slurry's rheological properties is often reduced with the addition of OBMs due to their incompatibility with the other materials present in slurries (Brothers and deBlanc, 1989;Skalle and Sveen, 1991;Harden, 1992;Joel et al, 2012). There have been also reports that show that the addition of OBMs can sufficiently alter the rheological behavior to make cement not pumpable.…”

Section: Rheological Behavior Of Slurry Contamination By Obmsmentioning

confidence: 99%

Contamination of cement slurries with diesel-based drilling fluids in a shale gas well

et al. 2015

Journal of Natural Gas Science and Engineering

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Section: Rheological Behavior Of Slurry Contamination By Obmsmentioning

confidence: 99%

Contamination of cement slurries with diesel-based drilling fluids in a shale gas well

et al. 2015

Journal of Natural Gas Science and Engineering

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“…This behavior could be explained by the pretreatment of the WBDFs with NaHCO 3 , which reacts with lime. Then, H + is released consuming OH − , which provokes a reduction of pH, allowing the dissolution of additional lime [ 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

Modified Starch as a Filter Controller in Water-Based Drilling Fluids

et al. 2020

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Herein, the effectiveness of an itaconic acid (IA) graft copolymer on native corn starch (NCS) as a filter control agent in fresh water-based drilling fluids (WBDFs) was evaluated. The copolymer (S-g-IA_APS) was synthesized by conventional radical dispersion polymerization using the redox initiation system (NH4)2S2O8/NaHSO3. The modification of the starches was verified by volumetry, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Then, three WBDFs were formulated in which only the added polymer (NCS, S-g-IA_APS, and a commercial starch (CPS)) was varied to control the fluid losses. The physico-chemical, rheological, and filtering properties of the formulated systems were evaluated in terms of density (ρ), pH, plastic viscosity (µp), apparent viscosity (µa), yield point (Yp), gel strength (Rg), and filtrated volume (VAPI). In order to evaluate the resistance to temperature and contaminants of the WBDFs, they were subjected to high pressure and high temperature filtering (VHPHT). The filter control agents were also subjected to aging and contamination with cement and salt. The S-g-IA_APS addition improved the filtering behavior at a high pressure and temperature by 38%.

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“…It was illustrated that OBMs deteriorated the cement slurry rheological property. It has been reported in the literature that the rheological properties of cement slurry are often reduced with the addition of OBMs due to their incompatibility [34,35]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Research on New Materials to Improve the Bonding Strength and Relieve Contamination of the Cement Slurry with Oil Based Muds

Liu

Guo

et al. 2016

MSF

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During shale gas well drilling and completion, the oil based muds (OBMs) would reduce the bonding strength of cement slurry by filter-cake and oil-wettability. At the same time, mixing cement slurry with the OBMs can lead to contamination, and subsequently creates significant problems, such as, reducing the normal thickening time and the compressive strength, and hence affecting the quality of the cementing of the shale gas well. Therefore in the present investigation, the mechanism of the interface displacement, wetting conversion and the contamination was explored by Atomic Force Microscopy (AFM), X-Ray Diffraction (XRD), scanning electron microscope (SEM) and other methods. And then the new materials with the enhanced bonding strength and the contamination relieving by OBMs were obtained. The results showed that the chemical composition of filter-cake determined the properties of chemical preflush, the combined systems (LSS) efficiently flushed filter-cake and increased the bonding strength. It has been found that the reverse wetting agent (APG) has better reverse wetting properties than Tarim Oilfield current application system, which effectively changes the wettability of cementing surface from lipophilicity to hydrophilic. The OBMs and cement slurry mixing generated the emulsion structure and honeycomb structure, and the structures can affect the rheology and the strength of cement slurry; the contaminative relieve agent (SCW) can form a thin film on the surface of the cement stone, the film covers the hole and improves cement compressive strength, thus the SCW can relieve the contamination by OBMs.

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Effect of Cement Contamination on Some Properties of Drilling Mud

Cited by 10 publications

References 1 publication

Contamination of cement slurries with diesel-based drilling fluids in a shale gas well

Contamination of cement slurries with diesel-based drilling fluids in a shale gas well

Modified Starch as a Filter Controller in Water-Based Drilling Fluids

Research on New Materials to Improve the Bonding Strength and Relieve Contamination of the Cement Slurry with Oil Based Muds

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