Geochemical processes during hydraulic fracturing: a water-rock interaction experiment and field test study
Geochemical processes during hydraulic fracturing: a water-rock interaction experiment and field test study
复制标题
水力压裂过程中的地球化学过程：水岩相互作用实验和现场试验研究
DOI：
10.1007/s12303-017-0114-5
复制
发表时间：
2017-08
影响因子：
1.2
通讯作者：
Jin Chao
中科院分区：
文献类型：
--
作者：
Li Yiman;Huang Tianming;Pang Zhonghe;Jin Chao
与回流液相关的各种环境问题最近已成为页岩气生产期间水力压裂的关注点。通过油藏条件下的水岩相互作用实验，对四川盆地涪陵区块下志留统龙马溪组页岩水力压裂地球化学反应进行了详细研究，并与现场试验数据进行了对比。结果表明，返排液的总溶解固体（TDS）增加，Ca2+、Na+、Cl-和SO42-占主导地位。 Na+和Cl-的增加被认为是由于石盐溶解并与海相储层中的原位地层水混合引起的。推断主要地球化学反应是黄铁矿氧化和方解石、白云石和斜长石的溶解，导致返排液中主要离子增加。锰、镍、钼、锌等重金属超出了中国饮用水标准，泄漏的潜在威胁值得关注。除CH4外，作为地下水系统的特定污染物，浅层地下水系统的无机地球化学监测还应跟踪TDS，主要离子Cl-、SO42-、Na+、Ca2+，微量元素Li、Ni、Pb、Cu、Zn、Mn、Mo、Rb，以及稳定同位素，如18OH2O、2HH2O、13CDIC。
Various environmental problems related to flowback fluid have recently become a concern for hydraulic fracturing during shale gas production. Detailed studies on the geochemical reactions during hydraulic fracturing are performed for the Lower Silurian Longmaxi shale formation, Fuling block, Sichuan basin, SW China, through water-rock interaction experiment conducted under reservoir conditions, and comparisons with field test data are made. Results show that the total dissolved solids (TDS) of the flowback fluid increases and Ca2+, Na+, Cl–and SO42–make dominant contributions. The increases of Na+and Cl–are assumed to be caused by halite dissolution and mixing with in situ formation water in the marine facies reservoir. The main geochemical reactions are inferred to be pyrite oxidation and the dissolution of calcite, dolomite and plagioclase, resulting in increases of major ions in the flowback fluid. Heavy metals, including Mn, Ni, Mo and Zn, exceed the drinking water criteria of China, and the potential threat from leakage should be a concern. Besides of CH4, as the specific pollutant to groundwater system, inorganic geochemical monitoring of shallow groundwater system should track TDS, major ions of Cl–, SO42–, Na+, and Ca2+, trace elements of Li, Ni, Pb, Cu, Zn, Mn, Mo and Rb, and stable isotopes, such as18OH2O,2HH2Oand13CDIC.
登录
查看更多内容
影响因子：
2.6
作者：
J. Saiers;E. Barth
通讯作者：
J. Saiers;E. Barth
影响因子：
--
作者：
Zhang Qin
通讯作者：
Zhang Qin
影响因子：
--
作者：
M. Key
通讯作者：
M. Key
影响因子：
1.8
作者：
Huang Jinliang
通讯作者：
Huang Jinliang
DOI：
10.2118/175925-ms
发表时间：
2015-10
期刊：
--
影响因子：
--
作者：
A. Zolfaghari;Yingzhe Tang;Jordan Holyk;Mojtaba Binazadeh;H. Dehghanpour;D. Bearinger
通讯作者：
A. Zolfaghari;Yingzhe Tang;Jordan Holyk;Mojtaba Binazadeh;H. Dehghanpour;D. Bearinger