Structure of the hydrogeological field of the Krasnoleninsky arch

International Academic Conference "The state, trends and problems of development of the oil and gas potential of Western Siberia"

地球科学;能源学

Abdrashitova, R.N.^1 ; Salnikova, Yu. I.^1

Industrial University of Tyumen, 38 Volodarskogo st., Tyumen

625000, Russia^1

关键词: Authigenic minerals;    High temperature;    Hydrogeological;    Middle Jurassic;    Neotectonics;    Oil and gas;    Sedimentary covers;    Seismic datas;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/181/1/012001/pdf
DOI  :  10.1088/1755-1315/181/1/012001

来源: IOP

【 摘 要 】

The study is devoted to the problem of formation of the hydrogeological field of the deep oil and gas bearing horizons of the Krasnoleninsky Arch. Analysis of seismic data shows the presence of a large concentration of discontinuous violations, which can be traced from the basement and have a different penetration depth in the sedimentary cover. It is shown that significant fluctuations in the parameters of the composition of groundwater and hydrostatic pressure at the depth of the Lower-Middle Jurassic hydrogeological complex are associated with the receipt of deep high-temperature fluids from discontinuous disturbances that are formed under the influence of neotectonic processes. The pressure deficit can reach 9 MPa, an average of 1.6 MPa, and fluctuations in mineralization values range from 3 g/l to 12 g/l. Data have been obtained indicating the dependence of the occurrence of hydrocarbonate-sodium type waters with low mineralization from the position of faults (this type of water is found in samples taken from wells located at a distance of no more than 3 km from the recorded rupture violation). Chlorcalcium type, according to V.A. Sulin, with mineralization normal for these depths is determined in samples taken also from the Lower-Middle Jurassic complex, but from wells located at a distance of more than 2.5-3 km from the revealed disruption. Evidence of the deep fluids' effect on the complex rocks are provided (the presence of such authigenic minerals as pyrite, siderite, dickite, carbonates, and kaolinite in rocks of the complex).