| 000 | 02423nab a2200253 4500 | ||
|---|---|---|---|
| 005 | 20260520000320.0 | ||
| 008 | 260224s2016 xxu ing | ||
| 041 | _aInglés | ||
| 245 | 0 | 0 |
_aDeep-water depositional mechanisms and significance for unconventional hydrocarbon exploration _bA case study from the lower Silurian Longmaxi shale in the southeastern Sichuan Basin |
| 260 |
_a _b _cmayo 2016 |
||
| 270 | _a04/07/2016 ; 04/07/2016 | ||
| 300 | _a21 p. ; 773-794 | ||
| 520 | _aTranscripción del resumen del autor: The purpose of this work was to study the depositional mechanisms and significance of the Longmaxi shale in the Sichuan Basin in southern China. Seven lithofacies were identified based on the detailed observation of outcrops and cores using petrographic and scanning electron microscope examination of thin sections and other data analyses: (1) laminated calcareous mudstone, (2) laminated carbonaceous mudstone, (3) laminated silty mudstone, (4) laminated claystone, (5) laminated siliceous shale, (6) siltstone, and (7) massive mudstone. The laminated mudstone and laminated claystone originated from suspension deposition, and siliceous shale is associated with ocean upwelling, whereas massive mudstone and siltstone were primarily deposited by turbidity currents. The depositional mechanisms have a great effect on the source rock and reservoir properties. Suspension deposition near oceanic upwelling zones can provide favorable conditions for the production and preservation of organic matter and are thus conducive to the formation of high-quality source rocks (total organic carbon content up to 5.4%). The reservoir storage spaces are primarily interlaminated fractures and organic pores with good physical reservoir properties (high porosity, permeability, and brittle mineral content). Turbidity currents may carry a large quantity of oxygen to the seafloor, resulting in the oxidation of organic matter, which is unfavorable for its preservation. The lithofacies formed by turbidity currents have relatively low total organic carbon contents (average: | ||
| 581 | _a5 | ||
| 773 | 0 |
_tAAPG Bulletin _g100 |
|
| 942 | _cARTICULO | ||
| 100 | 1 |
_aLiang, Chao _955415 |
|
| 100 | 1 |
_aJiang, Zaixing _955416 |
|
| 100 | 1 |
_aCao, Yingchang _955417 |
|
| 100 | 1 |
_aWu, Minghao _955418 |
|
| 100 | 1 |
_aGuo, Ling _955419 |
|
| 100 | 1 |
_aZhang, Chunming _940807 |
|
| 999 |
_c189602 _d189602 |
||