Chemical Characteristics and Development Significance of Trace Elements in Produced Water with Coalbed Methane in Tiefa Basin

Tong, Chuanxia; Huang, Huazhou; He, Huan; Wang, Bo

doi:10.1021/acsomega.9b02562

Cited by 13 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is an array of other factors that may also impact the dissolved element concentrations. These can include leaching, adsorption, redox, and water mixing (Tong et al, 2019 ); mineral composition (Ahamed et al, 2019 ); natural water content of the formation (Jamshidi & Jessen, 2012 ; Moore, 2012 ); reservoir characteristics such as porosity and permeability (Moore, 2012 ); time since initiation of pumping, well spacing, and density (Kondash et al, 2017 ); and methanogenic organisms that are able reduce heavy metals (Colosimo et al, 2016 ) and WQPs (e.g., pH and temperature).…”

Section: Discussionmentioning

confidence: 99%

The Acute Toxicity of Salinity in Onshore Unconventional Gas Waters to Freshwater Invertebrates in Receiving Environments: A Systematic Review

Willems

Kumar

Nugegoda

2022

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Industries such as unconventional natural gas have seen increased global expansion to meet the increasing energy needs of our increasing global population. Unconventional gas uses hydraulic fracturing that produces significant volumes of produced waters, which can be highly saline and pose a toxic threat to freshwater invertebrates if exposure via discharges, spills, leaks, or runoff were to occur. The primary aim of the present review was to determine the sodium (Na + ) and chloride (Cl − ) content of these waters as an approximate measure of salinity and how these values compare to the NaCl or synthetic marine salt acute toxicity values of freshwater invertebrate taxa. Shale gas produced waters are much more saline with 78 900 ± 10 200 NaCl mg/L and total dissolved solids (TDS) of 83 200 ± 12 200 mg/L compared to coal bed methane (CBM) produced waters with 4300 ± 1100 NaCl mg/L and TDS of 5900 ± 1300 mg/L and pose a far greater toxicity risk from NaCl to freshwater invertebrates. In addition, the toxicity of other major ions (Ca 2+ , K + , Mg 2+ , CO 3 2− , HCO 3 − , and SO 4 2−) and their influence on the toxicity of Na + and Cl − were evaluated. Exposure of untreated and undiluted shale gas produced waters to freshwater invertebrates is likely to result in significant or complete mortality. Shale gas produced waters have higher concentrations of various metals compared with CBM produced waters and are more acidic. We recommend future research to increase the reporting and consistency of water quality parameters, metals, and particularly organics of produced waters to provide a better baseline and help in further investigations.

show abstract

Section: Discussionmentioning

confidence: 99%

The Acute Toxicity of Salinity in Onshore Unconventional Gas Waters to Freshwater Invertebrates in Receiving Environments: A Systematic Review

Willems

Kumar

Nugegoda

2022

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…5 The samples are collected from the water outlet of the CBM wells. The sampling methods were described elsewhere by Huang et al and Tong et al 5,28,47 The concentrations of cations and anions, including Cl − , SO , HCO 3 − , K + , Na + , Ca 2+ , and Mg 2+ , were analyzed with an ICS-1500 ion chromatograph. Isotopes of hydrogen and oxygen were measured using a laser water isotope analyzer (LGR company 912−0026).…”

Section: Geological Description Of the Study Areamentioning

confidence: 99%

“…Existing studies have focused on the water quality over drainage time and the relationship between the water quality and gas production in the Tiefa Basin in China. ,, The purpose of this article is to analyze the effect of the fracking fluid on produced water to determine whether produced water is primitive formation water, explore the causes of changes in water quality, and investigate the water sources based on ionic compositions, δD and δ 18 O, and δ 13 C DIC in produced water in the Tiefa Basin.…”

Section: Introductionmentioning

confidence: 99%

Ion and Stable Isotope Geochemistry of Produced Water in Coalbed Methane Wells in the Tiefa Basin

Huang,

Tong,

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

The potential geochemical information in the produced water of coalbed methane (CBM) wells is conducive to the exploration and development of CBM in the case that the produced water is primitive formation water. A total of 58 produced water samples collected from 13 CBM wells in the Daxing Mine, Tiefa Basin, were investigated. Ionic composition tests and stable isotope analysis were conducted to explore the geochemical characteristics and sources of produced water as well as the method for determining whether the produced water is primitive formation water. The results suggest that the fracking fluid for CBM stimulations is the main factor affecting the ion change of the produced water in the initial stage of drainage. The concentrations of Cl– and Ca2+ + Mg2+ could be taken as the indices to identify whether the produced water is primitive formation water. When the Cl– concentration is lower than 20 mEq/L and the Ca2+ + Mg2+ concentration is lower than 1 mEq/L, the produced water is close to the pristine formation water. Biogenic methanogenic activity may result in a high δ13CDIC and high concentrations of HCO3 – in the pristine formation water in the Tiefa Basin. The data of δD and δ18O in the study area suggest that the formation water might come from atmospheric precipitation, which is later affected by evaporation and the water–rock reaction. The hydrogen isotope values in the produced water derived from the lower coal group display a substantial elevation compared to those from the upper coal group. This disparity in the hydrogen isotope composition presents an opportunity to utilize δD in produced water as a tool for distinguishing the formation water between these two groups.

show abstract

“…Regional and mine structures form different sealing conditions, which have a considerable control effect on the distribution of gas content in coal seams (Moore 2012;Gao et al 2020;Quan et al 2020). Given a large compressive stress in compressional fault, fault gouge and mylonite with compacted structure are relatively developed, and the permeability of gas is poor (Bustin and Clarkson 1998;Zhang et al 2016;Tong et al 2019). Gas migration along the fault or vertical fault plane is relatively difficult, thereby becoming conducive to gas accumulation; meanwhile, the opposite holds for extensional fault.…”

Section: Understanding Of Coal Seam Gas Occurrence Characteristicsmentioning

confidence: 99%

Prediction of gas pressure in thin coal seams in the Qinglong Coal Mine in Guizhou Province, China

Zhang

Wang

et al. 2021

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

Thin coal seams in mines usually lack gas data. Thus, preventing and controlling gas outbursts of thin coal seams are difficult. In this study, a coal structure index, which is used to express the damage degree of coal, was estimated by logging curve. In accordance with the contour line of the floor of the coal seam, structural curvature was calculated to express the complexity of the coal seam structure quantitatively. Subsequently, relationships among the burial depth, thickness, coal structure index, structural curvature were analyzed on the basis of the gas pressure of coal seam. The gas pressure values of the coal seams of Nos. 22, 24, and 27 in the study area were predicted by multiple linear regression (MLR) and were then verified and analyzed. The deviation rate of the MLR method was 6.5%–19.7%, with an average of 13.0%. The average deviation rate between the predicted value and the measured value was 11.6%, except for the measuring point of No. 2, which had a large deviation. Results show that the prediction accuracy of the aforementioned method is acceptable and has practical value in the prediction of gas pressure in thin coal seams without measured data. The results in the gas pressure prediction provide a basis for evaluating the risk of gas outbursts in thin coal seams.

show abstract

Chemical Characteristics and Development Significance of Trace Elements in Produced Water with Coalbed Methane in Tiefa Basin

Cited by 13 publications

References 33 publications

The Acute Toxicity of Salinity in Onshore Unconventional Gas Waters to Freshwater Invertebrates in Receiving Environments: A Systematic Review

The Acute Toxicity of Salinity in Onshore Unconventional Gas Waters to Freshwater Invertebrates in Receiving Environments: A Systematic Review

Ion and Stable Isotope Geochemistry of Produced Water in Coalbed Methane Wells in the Tiefa Basin

Prediction of gas pressure in thin coal seams in the Qinglong Coal Mine in Guizhou Province, China

Contact Info

Product

Resources

About