Rock/Fluid Chemistry Impacts on Shale Fracture Behavior

Aderibigbe, Aderonke; Lane, Robert H.

doi:10.2118/164102-ms

Cited by 14 publications

(6 citation statements)

References 10 publications

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“…Salt helps to decrease the ionic nature of clay and thus leaves fewer sites remaining for the polymer to adsorb (Menon and Wasan 1987a;Kulshrestha et al 2004). In previous work, it has been shown that salts such as KCl minimize clay hydration and swelling, thereby minimizing the interaction of shale with fluid (van Oort 1994;Patel et al 2001;van Anderson et al 2010;Lane and Aderibigbe 2013). However, with Pride Mountain shale, the zeta potential values are higher in the presence of TMAC.…”

Section: Characterizing Polymer-shale Interaction Through Zeta Potentmentioning

confidence: 99%

Quantitative characterization of polyacrylamide–shale interaction under various saline conditions

et al. 2017

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Interaction of polymer-containing injected fluids with shale is a widely studied phenomenon, but much is still unknown about the interaction of charged polyacrylamides such as anionic and cationic polyacrylamides with shale. The nature of interaction of charged polyacrylamides with shale is not well understood, especially from the perspective of assessing the potential for polyacrylamides to cause formation damage. Zeta potential and rheological measurements were made for Chattanooga and Pride Mountain shales suspended in polyacrylamide solutions with and without inorganic salts and tetramethyl ammonium chloride (TMAC). The change in zeta potential and viscosity with time was recorded. The magnitude of decrease in the absolute value of zeta potential with time is indicative of adsorption of polymer on the surface of shale and serves as a measure of the extent of polymer interaction with shale. The salts that were used in this study are potassium chloride (KCl), sodium chloride (NaCl). This study quantified the interaction of anionic and cationic polyacrylamide with different North American shales. From the experimental results, it was determined that the polyacrylamides can interact strongly with shale, particularly the cationic polyacrylamide. The objective of this study was to determine the extent of interaction of anionic and cationic polyacrylamide with each shale sample in the presence of additives such as salts.

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Section: Characterizing Polymer-shale Interaction Through Zeta Potentmentioning

confidence: 99%

Quantitative characterization of polyacrylamide–shale interaction under various saline conditions

et al. 2017

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“…Hitherto, there still lack of data regarding the impact of hydrogen on subcritical crack growth. However, previous experience and knowledge from Earth's crust deformation [213,221], hydrocarbons exploitation [222][223][224], CO2 geosequestration [225] and mechanical weathering and rock erosion [226][227][228] can help to assess the impact of subcritical crack growth within fractures and reservoirs when hydrogen is involved.…”

Section: Surface Energy Change and Subcritical Crack Growthmentioning

confidence: 99%

Storage Integrity during Underground Hydrogen Storage in Depleted Gas Reservoirs

Zeng¹,

Sarmadivaleh²,

Saeedi³

et al. 2022

Preprint

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The transition of energy from fossil fuels to renewable energy particularly hydrogen is becoming the centre of decarbonization and roadmap to achieve net-zero carbon emission. To meet the requirement of large-scale hydrogen storage as a key part of hydrogen supply chain, underground hydrogen storage can be the ultimate solution to economically store hydrogen thus meet global energy demand. Compared to other types of subsurface storage sites such as salt caverns and aquifers which are limited to geographical locations, depleted gas reservoirs have been raising more interest because of the wider distribution and higher storage capacity. However, safely storing and cycling of hydrogen in depleted gas reservoirs requires caprock, reservoir and wellbore to remain high stability and integrity. Nevertheless, current research on storage integrity during underground hydrogen in depleted gas reservoirs is still scarce and non-systemic. We therefore reviewed the major challenges on storage integrity associated with geochemical reactions, microbial activities, faults and fractures and hydrogen cycling perspectives. The processes and impacts of abiotic and biotic mineral dissolution/precipitation, faults and fracture reactivation and propagation in caprock and host-rock, wellbore instability due to cement degradation and casing corrosion, stress change during hydrogen cycling, etc. on storage integrity were comprehensive reviewed and analysed. Furthermore, a technical screening tool with consideration of controlling variables, risks and consequences on storage integrity was developed to identify the potential risks associated with storage integrity. Lastly, knowledge gaps together with feasible methods and pathways have been identified to mitigate the risks and thus enables large-scale underground hydrogen storage.

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“…Commonly, large volumes of water-based fracturing fluids are injected into the reservoir during the fracturing process. However, there is a large difference between the volume of slick water injected and flowback, which means a lot of slick water remains trapped in the reservoir and will react with the shale matrix [14][15][16]. The interaction between slick water and shale may have a great impact on the storage and flow of shale gas [15,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the wettability of shale is also critical to shale gas production, which is related to the imbibition of fracturing fluid and the possible water blocking effect, which has an important effect on the fluid transport process [16,27]. Prior researches have been done on the reaction principles of slick water and shale matrix, and it was found that the swelling of clay minerals and dissolution of carbonate minerals cause changes in pore structures of shale reservoirs [14,23,24]. Understanding how slick water changes pore structure and physical properties is essential for the design and application of fracturing [26], and the effects of slick water-shale interaction on pore structure and physical properties need further discussion [28].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation into the Effects of Fracturing Fluid-Shale Interaction on Pore Structure and Wettability

Zhang

Lai

et al. 2021

Geofluids

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One of the main techniques for the exploitation of shale oil and gas is hydraulic fracturing, and the fracturing fluid (slick water) may interact with minerals during the fracturing process, which has a significant effect on the shale pore structure. In this study, the pore structure and fluid distribution of shale samples were analyzed by utilizing low-pressure liquid nitrogen adsorption (LP-N2GA) and nuclear magnetic resonance (NMR). The fractal analysis showed that the pore structure of the sample was strongly heterogeneous. It was also found that the effect of slick water on pore structure can be attributed to two phenomena: the swelling of clay minerals and the dissolution of carbonate minerals. The swelling and dissolution of minerals can exist at the same time, and the strength of them at different soaking times is different, leading to the changes in specific surface area and pore size. After the samples were soaked in the slick water for two days, the contact angle reached the minimum value (below 8°), which means the sample is strongly hydrophilic; then the contact angle increased to above 38° with longer soaking times. The connected pore space in the shale matrix is enlarged by the soaking processing. Therefore, an in-depth understanding of the interaction between the fracking fluid and shale is essential to deepen our understanding of changes in the pore structure in the reservoir and the long-term productivity of shale gas.

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Rock/Fluid Chemistry Impacts on Shale Fracture Behavior

Cited by 14 publications

References 10 publications

Quantitative characterization of polyacrylamide–shale interaction under various saline conditions

Quantitative characterization of polyacrylamide–shale interaction under various saline conditions

Storage Integrity during Underground Hydrogen Storage in Depleted Gas Reservoirs

Experimental Investigation into the Effects of Fracturing Fluid-Shale Interaction on Pore Structure and Wettability

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