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Origin of Flowback and Produced Waters from Sichuan Basin, China
Ni, Yunyan1; Zou, Caineng1; Cui, Huiying1; Li, Jian1; Lauer, Nancy E.2; Harkness, Jennifer S.2; Kondash, Andrew J.2; Coyte, Rachel M.2; Dwyer, Gary S.2; Liu, Dan3; Dong, Dazhong1; Liao, Fengrong1; Vengosh, Avner2
2018-12-18
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume52Issue:24Pages:14519-14527
AbstractShale gas extraction through hydraulic fracturing and horizontal drilling is increasing in China, particularly in Sichuan Basin. Production of unconventional shale gas with minimal environmental effects requires adequate management of wastewater from flowback and produced water (FP water) that is coextracted with natural gas. Here we present, for the first time, inorganic chemistry and multiple isotope (oxygen, hydrogen, boron, strontium, radium) data for FP water from 13 shale gas wells from the Lower Silurian Longmaxi Formation in the Weiyuan gas field, as well as produced waters from 35 conventional gas wells from underlying (Sinian, Cambrian) and overlying (Permian, Triassic) formations in Sichuan Basin. The chemical and isotope data indicate that the formation waters in Sichuan Basin originated from relics of different stages of evaporated seawater modified by water-rock interactions. The FP water from shale gas wells derives from blending of injected hydraulic fracturing water and entrapped saline (Cl similar to 50,000 mg/L) formation water. Variations in the chemistry, delta O-18, delta B-11, and Sr-87/Sr-86 of FP water over time indicate that the mixing between the two sources varies with time, with a contribution of 75% (first 6 months) to 20% (>year) of the injected hydraulic fracturing water in the blend that compose the FP water. Mass-balance calculation suggests that the returned hydraulic fracturing water consisted of 28-49% of the volume of the injected hydraulic fracturing water, about a year after the initial hydraulic fracturing. We show differential mobilization of Na, B, Sr, and Li from the shale rocks during early stages of operation, which resulted in higher Na/Cl, B/Cl, Li/Cl, and Sr-87/Sr-86 and lower delta B-11 of the FP water during early stages of FP water formation relative to the original saline formation water recorded in late stages FP water. This study provides a geochemical framework for characterization of formation waters from different geological strata, and thus the ability to distinguish between different sources of oil and gas wastewater in Sichuan Basin.
DOI10.1021/acs.est.8b04345
Funding OrganizationPetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
WOS KeywordHYDRAULIC FRACTURING FLUIDS ; SHALE GAS ; MARCELLUS SHALE ; OIL ; PROSPECTS ; QUALITY ; GROUNDWATER ; EVAPORATION ; CHALLENGES ; IMPACTS
Language英语
Funding ProjectPetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
Funding OrganizationPetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China ; PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000454183400052
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90235
Collection中国科学院地质与地球物理研究所
Corresponding AuthorVengosh, Avner
Affiliation1.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
2.Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Ni, Yunyan,Zou, Caineng,Cui, Huiying,et al. Origin of Flowback and Produced Waters from Sichuan Basin, China[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(24):14519-14527.
APA Ni, Yunyan.,Zou, Caineng.,Cui, Huiying.,Li, Jian.,Lauer, Nancy E..,...&Vengosh, Avner.(2018).Origin of Flowback and Produced Waters from Sichuan Basin, China.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(24),14519-14527.
MLA Ni, Yunyan,et al."Origin of Flowback and Produced Waters from Sichuan Basin, China".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.24(2018):14519-14527.
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